DIPTI METAL INDUSTRIES
ASTM A182 F304H Stainless Steel Flanges: Global Manufacturer & Exporter
Dipti Metal Industries is a leading global ASTM A182 F304H Flanges manufacturer and exporter of ASTM A182 F304H Stainless Steel Flanges from Mumbai, India. F304H is a high-carbon variant of Grade 304 austenitic stainless steel, specifically designed for enhanced high-temperature strength and creep resistance, typically for service above 538°C (1000°F). It offers good oxidation resistance and excellent weldability. We supply a comprehensive range of ASTM A182 F304H flange types, ensuring high quality and performance for critical applications in power generation, chemical processing, petrochemical, and industrial exhaust systems worldwide. The typical HS Code for these products is 7307.21.
Overview: Dipti Metal Industries' Expertise in ASTM A182 F304H Stainless Steel Flanges
Dipti Metal Industries stands as a globally recognized ASTM A182 F304H Flanges manufacturer and ASTM A182 F304H Flanges exporter of high-performance ASTM A182 F304H Stainless Steel Flanges, operating from our advanced facilities in Mumbai, India. ASTM A182 F304H is a specific grade within the ASTM A182 standard, denoting a forged or rolled high-carbon austenitic stainless steel. It is a modification of the standard 304 grade, with a controlled higher carbon content (0.04-0.10%) that enhances its strength and creep resistance at elevated temperatures, making it particularly suitable for service above 538°C (1000°F).
Our commitment to quality ensures that all ASTM A182 F304H flanges are manufactured and supplied in strict adherence to major international standards, including **ASTM A182 (forged F304H), ASME B16.5 (Pipe Flanges and Flanged Fittings NPS 1/2 through NPS 24), ASME B16.47 (Large Diameter Steel Flanges NPS 26 through NPS 60), ASME B16.36 (Orifice Flanges), ASME B16.48 (Line Blanks), and EN 1092-1 (Flanges and their joints - Circular flanges for pipes, valves, fittings and accessories, PN designated)**. Every shipment is accompanied by comprehensive **EN 10204 3.1/3.2 Material Test Certificates (MTCs)**, guaranteeing full chemical and mechanical traceability. Dipti Metal is your reliable partner for F304H Stainless Steel Flange solutions, supporting complex and critical projects worldwide with unparalleled material integrity.
Key Features & Advanced Benefits of Our ASTM A182 F304H Stainless Steel Flanges
Dipti Metal Industries' ASTM A182 F304H Stainless Steel Flanges offer a distinct set of advantages, making them ideal for challenging high-temperature industrial environments:
- Enhanced High-Temperature Strength & Creep Resistance: The controlled higher carbon content in F304H significantly boosts its strength at elevated temperatures and improves its resistance to creep deformation under prolonged stress. This makes it ideal for service above 538°C (1000°F).
- Good Oxidation Resistance: F304H exhibits good resistance to oxidation and scaling in continuous service up to approximately 870°C (1600°F), similar to standard 304 stainless steel.
- Excellent Weldability: F304H can be readily welded using common fusion welding methods. While higher carbon content can increase the risk of sensitization, F304H is often used in applications where post-weld solution annealing is practical or where operating temperatures are high enough to mitigate sensitization effects.
- Good General Corrosion Resistance: Maintains the good general corrosion resistance of standard 304 stainless steel in a wide range of atmospheric and mild chemical environments.
- Thermal Stability: Designed for applications involving prolonged exposure to high temperatures where sustained mechanical properties are essential.
- Cost-Effective for High-Temperature Service: Offers a balance of high-temperature performance and cost-effectiveness compared to more highly alloyed materials, making it a valuable choice for certain elevated temperature applications.
Our Product Forms & Dimensions for ASTM A182 F304H Stainless Steel Flanges
Dipti Metal Industries supplies a comprehensive range of ASTM A182 F304H Stainless Steel Flanges in various types and dimensions, all conforming to strict international standards to meet the demanding requirements of your projects.
ASTM A182 F304H Weld Neck Flanges
Description: Designed with a long tapered hub that can be butt-welded to a pipe, reducing stress concentration at the base of the flange. Ideal for high-pressure, high-temperature, or sub-zero applications where fluid flow is critical.
- Standards: ASME B16.5, ASME B16.47 Series A/B, EN 1092-1
- Size Range: NPS 1/2" to 60" (DN15 to DN1500)
- Pressure Class: 150# to 2500# (PN10 to PN400)
- Facing: Raised Face (RF), Ring Type Joint (RTJ)
ASTM A182 F304H Slip-On Flanges
Description: These flanges slip over the outside of the pipe and are then externally and internally fillet welded. They are easier to align than Weld Neck flanges and are preferred for lower pressure applications, especially where space is a constraint.
- Standards: ASME B16.5, EN 1092-1
- Size Range: NPS 1/2" to 24" (DN15 to DN600)
- Pressure Class: 150# to 600# (PN10 to PN100)
- Facing: Raised Face (RF), Flat Face (FF)
ASTM A182 F304H Blind Flanges
Description: Used to blank off the end of a piping system or a valve opening. They are suitable for high-pressure applications and provide easy access to the pipeline once removed. Commonly used for future expansions or inspection points.
- Standards: ASME B16.5, ASME B16.47 Series A/B, EN 1092-1
- Size Range: NPS 1/2" to 60" (DN15 to DN1500)
- Pressure Class: 150# to 2500# (PN10 to PN400)
- Facing: Raised Face (RF), Flat Face (FF), Ring Type Joint (RTJ)
ASTM A182 F304H Socket Weld Flanges
Description: Designed for small diameter, high-pressure piping systems where the pipe is inserted into a socket and fillet welded around the top. Provides good flow characteristics and is economical for smaller bore applications.
- Standards: ASME B16.5, EN 1092-1
- Size Range: NPS 1/2" to 4" (DN15 to DN100)
- Pressure Class: 150# to 2500# (PN10 to PN400)
- Facing: Raised Face (RF)
ASTM A182 F304H Threaded Flanges
Description: Also known as screwed flanges, these are threaded onto the pipe without welding. Suitable for low-pressure, non-cyclic applications where welding may be hazardous or impossible, often in utility services.
- Standards: ASME B16.5, EN 1092-1
- Size Range: NPS 1/2" to 4" (DN15 to DN100)
- Pressure Class: 150# to 2500# (PN10 to PN400)
- Facing: Raised Face (RF)
ASTM A182 F304H Lap Joint Flanges
Description: These flanges consist of two components: a stub end and a loose backing flange. The stub end is butt-welded to the pipe, and the flange is free to rotate, simplifying bolt hole alignment. Ideal for frequent dismantling for inspection or cleaning.
- Standards: ASME B16.5, EN 1092-1
- Size Range: NPS 1/2" to 24" (DN15 to DN600)
- Pressure Class: 150# to 600# (PN10 to PN100)
- Facing: Flat Face (FF) with a Stub End
ASTM A182 F304H Orifice Flanges
Description: Used with orifice meters to measure the flow rate of fluids in a pipeline. They have additional bolt holes or jack screws for easy installation and removal of orifice plates. Supplied in pairs with tapping points.
- Standards: ASME B16.36
- Size Range: NPS 1" to 24" (DN25 to DN600)
- Pressure Class: 300# to 2500#
- Facing: Raised Face (RF) or Ring Type Joint (RTJ)
ASTM A182 F304H Spectacle Blind Flanges
Description: A safety device consisting of a figure-eight shaped metal piece, half solid and half open. It can be rotated to either completely block flow (blind side) or allow full flow (open side) in a pipeline, primarily for isolation during maintenance.
- Standards: ASME B16.48
- Size Range: NPS 1/2" to 24" (DN15 to DN600)
- Pressure Class: 150# to 2500#
- Facing: Raised Face (RF) or Ring Type Joint (RTJ)
Other ASTM A182 F304H Flange Types
- ASTM A182 F304H Long Weld Neck Flanges: Similar to Weld Neck but with an extended neck, often used for vessels.
- ASTM A182 F304H Reducing Flanges: Combines a flange with a reducer, connecting pipes of different nominal sizes.
- ASTM A182 F304H Ring Type Joint (RTJ) Flanges: Feature a groove for a metal ring gasket, providing a strong, leak-proof seal for high-pressure, high-temperature service.
- ASTM A182 F304H Plate Flanges: Simple flat plates with bolt holes, typically used for low-pressure or non-critical applications.
Technical Specifications: ASTM A182 F304H Stainless Steel Flanges
Our ASTM A182 F304H Stainless Steel Flanges are manufactured and supplied to strict technical specifications, ensuring precise chemical composition and robust mechanical properties for reliable performance in demanding environments.
Chemical Composition (Weight % Max, unless otherwise stated)
| Element | Composition (%) |
|---|---|
| Carbon (C) | 0.04 - 0.10 |
| Manganese (Mn) | 2.00 max |
| Phosphorus (P) | 0.045 max |
| Sulfur (S) | 0.030 max |
| Silicon (Si) | 1.00 max |
| Chromium (Cr) | 18.0 - 20.0 |
| Nickel (Ni) | 8.0 - 11.0 |
Note: The "H" designation indicates a higher carbon range (0.04-0.10%) compared to standard 304, which improves high-temperature strength. Detailed specifications, including trace elements and specific analysis requirements, are available in the full ASTM A182 standard. All material test certificates (MTCs) conform to EN 10204 3.1/3.2.
Mechanical Properties (Minimum Requirements for Annealed F304H)
| Property | Value |
|---|---|
| Tensile Strength | 515 MPa (75 ksi) min |
| Yield Strength (0.2% Offset) | 205 MPa (30 ksi) min |
| Elongation in 50 mm (2 in.) | 30% min |
| Hardness (Brinell) | 217 HB max |
| Hardness (Rockwell B) | 95 HRB max |
Note: The "H" designation implies a higher carbon range for enhanced high-temperature properties. Mechanical properties can vary based on product form and heat treatment. For exact values, refer to the specific ASTM A182 standard.
Equivalent Grades & International Cross-References for ASTM A182 F304H
ASTM A182 F304H is a globally recognized high-carbon variant of austenitic stainless steel. Dipti Metal Industries ensures that our supplied materials conform to the requirements of F304H and its most common international equivalent designations, facilitating seamless integration into diverse global projects. These equivalents represent the same or very similar material chemistry and properties, making them largely interchangeable for many critical high-temperature applications.
| Standard | Grade / Designation | Description |
|---|---|---|
| ASTM (American Society for Testing and Materials) | A182 F304H | Forged or rolled alloy and stainless steel pipe flanges, forged fittings, and valves and parts for high-temperature service (Primary Reference). High carbon variant of 304. |
| UNS (Unified Numbering System) | S30409 | Official UNS designation specifically for 304H Stainless Steel. |
| EN (European Norm) | X6CrNi18-10 (1.4948) | Corresponds to EN 10222-5 (Forgings for pressure purposes) and EN 10088-3 (Stainless steels). This is the European equivalent for 304H, indicating a controlled high carbon range for high-temperature use. |
| JIS (Japanese Industrial Standards) | SUS F304H | Corresponds to JIS G3214 (Stainless steel forgings for pressure uses) and JIS G4303 (Stainless steel bars). Japanese equivalent for forged F304H. |
| DIN (German Institute for Standardization) | 1.4948 (X6CrNi18-10) | German material number, identical to the EN designation, for high-carbon austenitic stainless steel. |
| BS (British Standards) | 304S31 | Older British Standard designation for high carbon 304, now largely superseded by EN standards. |
| AFNOR (French Standards) | Z7CN18-09 | French Standard designation for Stainless Steel 304 with higher carbon. |
| ISO (International Organization for Standardization) | ISO 2604-2 (Equivalent) | While ISO does not have a single 'F304H' equivalent, the chemical composition aligns with several ISO standards for wrought stainless steel. ISO 15156-3 (for NACE) also references this composition for high-temperature use. |
| GOST (State Standard of Russian Federation) | 10Kh18N10 (10Х18Н10) | Closest GOST equivalent for high carbon 304 type stainless steel. |
Note: While these grades are generally considered equivalent for many applications, always consult specific project requirements and applicable codes, as minor differences in chemical composition, heat treatment, or mechanical properties can exist between standards. Dipti Metal Industries provides full certifications to ensure compliance with the specified standard.
HS Code for ASTM A182 F304H Stainless Steel Flanges
For international trade and customs classification, the Harmonized System (HS) Code for Stainless Steel Flanges, including ASTM A182 F304H, typically falls under:
- HS Code: 7307.21
- Description: Flanges of stainless steel.
Note: While this is the most common HS code, specific national customs regulations or the exact product characteristics (e.g., if combined with other materials) might lead to variations. Always verify with your customs broker or relevant authorities for precise classification for your specific shipment.
Extensive Industries & Applications for Dipti Metal Industries' F304H Flanges
Dipti Metal Industries' ASTM A182 F304H Stainless Steel Flanges are indispensable in a broad spectrum of critical industrial sectors and demanding high-temperature environments. Their unique properties ensure reliable and long-lasting performance:
- Power Generation Industry: Essential for superheater, reheater, and boiler tube applications where enhanced high-temperature strength and creep resistance are critical.
- Petrochemical & Refinery Industries: Utilized in critical process piping, heat exchangers, and furnace components exposed to high temperatures, particularly where sustained strength is needed.
- Chemical Processing Industry (High Temperature): Indispensable for piping systems handling hot, corrosive chemicals where its superior high-temperature mechanical properties are required.
- Industrial Exhaust Systems: For components in high-temperature exhaust and flue gas systems where resistance to thermal stresses and oxidation is needed, particularly when operating above 538°C (1000°F).
- Thermal Process Plants: For furnace parts, radiant tubes, and other equipment operating under continuous high-temperature conditions requiring robust material performance.
- Heat Treatment Equipment: Used in fixtures and components for high-temperature heat treatment furnaces.
- Steam Service: For high-temperature steam piping and components where enhanced strength at elevated temperatures is required.
The unparalleled high carbon content for enhanced high-temperature strength and creep resistance, combined with good oxidation resistance and reliability of ASTM A182 F304H Stainless Steel Flanges, make them the preferred choice for ensuring safety, integrity, and longevity in these diverse and demanding global sectors.
Global Export Capabilities & Logistics from India for ASTM A182 F304H Stainless Steel Flanges
Dipti Metal Industries is a proud Worldwide Exporter and Global Supplier of ASTM A182 F304H Stainless Steel Flanges, supported by an extensive network of Dealers, Distributors, and Stockists. We ensure timely and compliant delivery of our premium products, manufactured in our facilities, to major industrial hubs across the globe, with a strong focus on critical industrial regions worldwide, solidifying our position as a top international manufacturing and trading partner.
Key Importing Regions & Global Reach
- Algeria: Algiers, Oran
- Angola: Luanda, Huambo
- Egypt: Cairo, Alexandria, Port Said
- Ghana: Accra, Kumasi
- Kenya: Nairobi, Mombasa
- Libya: Tripoli, Benghazi
- Morocco: Casablanca, Rabat
- Mozambique: Maputo, Beira
- Nigeria: Lagos, Port Harcourt, Abuja (Key for Oil & Gas, Chemical)
- Rwanda: Kigali, Rubavu
- South Africa: Johannesburg, Durban, Cape Town, Sasolburg (Key for Mining & Chemical)
- Tanzania: Dar es Salaam, Mwanza
- Tunisia: Tunis, Sfax
- Uganda: Kampala, Gulu
- Botswana, Burkina Faso, Burundi, Cabo Verde, Central African Republic, Chad, Comoros, Congo (Republic), Congo (DRC), Côte d’Ivoire, Djibouti, Equatorial Guinea, Eritrea, Eswatini, Ethiopia, Gabon, Gambia, Guinea, Guinea-Bissau, Lesotho, Liberia, Madagascar, Malawi, Mali, Mauritania, Mauritius, Namibia, Niger, São Tomé & Príncipe, Senegal, Seychelles, Sierra Leone, Somalia, South Sudan, Sudan, Togo, Zambia, Zimbabwe
- Argentina: Buenos Aires, Cordoba
- Bolivia: La Paz, Santa Cruz
- Brazil: São Paulo, Rio de Janeiro, Salvador (Key for Oil & Gas, Chemical)
- Canada: Calgary, Edmonton, Vancouver, Toronto, Montreal (Key for Oil & Gas, Power Generation)
- Chile: Santiago, Valparaíso
- Colombia: Bogota, Medellin
- Ecuador: Quito, Guayaquil
- Mexico: Mexico City, Monterrey, Guadalajara
- Panama: Panama City, Colón
- Peru: Lima, Arequipa
- USA: Houston, Los Angeles, New York, Chicago, New Orleans (Primary Market for Power Generation, Chemical, Oil & Gas)
- Uruguay: Montevideo
- Venezuela: Caracas, Maracaibo
- Antigua & Barbuda, Bahamas, Barbados, Belize, Costa Rica, Cuba, Dominica, Dominican Republic, El Salvador, Grenada, Guatemala, Guyana, Haiti, Honduras, Jamaica, Nicaragua, Paraguay, Saint Kitts & Nevis, Saint Lucia, Saint Vincent & the Grenadines, Suriname, Trinidad & Tobago
- Bahrain: Manama, Sitra
- Bangladesh: Dhaka, Chittagong
- China: Shanghai, Guangzhou, Tianjin, Shenzhen (Key for Power Generation & Chemical)
- Hong Kong: Hong Kong City
- India: Mumbai, Delhi, Chennai, Kolkata, Bangalore, Hyderabad (Local Markets - Major Industrial Demand)
- Indonesia: Jakarta, Surabaya, Balikpapan (Key for Oil & Gas, Power Generation)
- Iran: Tehran, Mashhad
- Iraq: Baghdad, Basra
- Japan: Tokyo, Osaka, Nagoya (Primary for Power Generation & Petrochemical)
- Jordan: Amman, Irbid
- Kazakhstan: Nur-Sultan, Almaty
- Kuwait: Kuwait City, Ahmadi
- Lebanon: Beirut, Tripoli
- Malaysia: Kuala Lumpur, Johor Bahru, Port Klang
- Myanmar: Yangon, Mandalay
- Oman: Muscat, Sohar, Salalah
- Philippines: Manila, Cebu
- Qatar: Doha, Ras Laffan
- Saudi Arabia: Riyadh, Jeddah, Dammam, Al Khobar, Jubail (Key for Oil & Gas, Chemical)
- Singapore: Singapore City (Key for Petrochemical & Industrial Logistics)
- South Korea: Seoul, Busan, Ulsan (Primary for Power Generation & Shipbuilding)
- Sri Lanka: Colombo, Kandy
- Taiwan: Taipei, Kaohsiung
- Thailand: Bangkok, Rayong, Laem Chabang
- Turkey: Istanbul, Izmir, Ankara
- UAE: Dubai, Abu Dhabi, Sharjah, Ajman, Ras Al Khaimah (Key for Oil & Gas, Chemical)
- Uzbekistan: Tashkent, Samarkand
- Vietnam: Ho Chi Minh City, Hanoi, Da Nang
- Afghanistan, Armenia, Azerbaijan, Bhutan, Brunei, Cambodia, Cyprus, Georgia, Kyrgyzstan, Laos, Maldives, Mongolia, Nepal, North Korea, Syria, Tajikistan, Timor-Leste, Turkmenistan, Yemen
- Austria: Vienna, Salzburg
- Belgium: Antwerp, Brussels, Ghent
- Croatia: Zagreb, Split
- Czechia: Prague, Brno
- Denmark: Copenhagen, Aarhus
- Finland: Helsinki, Tampere
- France: Paris, Marseille, Lyon (Key for Chemical & Power Generation)
- Germany: Frankfurt, Hamburg, Munich, Düsseldorf (Primary for Chemical, Petrochemical & Power Gen)
- Greece: Athens, Thessaloniki
- Hungary: Budapest, Debrecen
- Italy: Milan, Rome, Genoa
- Netherlands: Rotterdam, Amsterdam, The Hague (Key for Petrochemical & Chemical)
- Norway: Oslo, Bergen
- Poland: Warsaw, Krakow
- Portugal: Lisbon, Porto
- Romania: Bucharest, Cluj-Napoca
- Russia: Moscow, Saint Petersburg, Kazan
- Serbia: Belgrade, Novi Sad
- Slovakia: Bratislava, Košice
- Spain: Madrid, Barcelona, Valencia
- Sweden: Stockholm, Gothenburg
- Switzerland: Zurich, Geneva, Basel
- United Kingdom: London, Manchester, Glasgow (Key for Power Generation & Oil & Gas)
- Albania, Andorra, Belarus, Bosnia & Herzegovina, Bulgaria, Estonia, Iceland, Ireland, Kosovo, Latvia, Lithuania, Luxembourg, Malta, Moldova, Monaco, Montenegro, North Macedonia, San Marino, Slovenia, Ukraine, Vatican City
- Australia: Sydney, Melbourne, Perth, Brisbane (Key for Mining, Oil & Gas & Power Gen)
- New Zealand: Auckland, Wellington, Christchurch
- Papua New Guinea: Port Moresby, Lae
- Fiji, Kiribati, Marshall Islands, Micronesia, Nauru, Palau, Samoa, Solomon Islands, Tonga, Tuvalu, Vanuatu
Indian Loading Ports for Global Dispatch
- JNPT (Nhava Sheva)
- Mundra
- Chennai
- Kolkata
- Visakhapatnam
- Pipavav
- Kandla
Professional Export Packing & Documentation
- Packing: Custom crates/pallets for large/heavy flanges; cartons for smaller lots; polybags for individual items, all designed for seaworthy transit.
- Protection: Includes desiccants for moisture control, robust stretch wrap, plastic/plywood flange protectors, and steel banding for secure containment.
- Clear Labeling: Each package is clearly labeled with essential information such as ASTM A182 F304H, flange type, dimensions, pressure class, quantity, heat/lot numbers, purchase order (PO) number, and country of origin (COO).
Why Choose Dipti Metal Industries for Your ASTM A182 F304H Stainless Steel Flanges?
- Leading Global Manufacturer & Specialized Expertise: As a premier global ASTM A182 F304H Flanges manufacturer and ASTM A182 F304H Flanges exporter from Mumbai, we specialize in ASTM A182 F304H Stainless Steel Flanges, offering deep expertise in producing components renowned for superior high-temperature strength and creep resistance in critical power generation, chemical, and industrial applications worldwide.
- Uncompromising Quality & Certifications: Our F304H flanges are sourced from certified mills and manufactured under strict ISO 9001 processes. We provide full material traceability with EN 10204 3.1/3.2 MTCs, guaranteeing that every flange meets stringent ASTM A182 and ASME B16.5/B16.47/B16.36 standards for chemical composition, mechanical properties, and dimensional accuracy.
- Comprehensive Product Range & Customization: We maintain extensive stock of ASTM A182 F304H flanges in all major types (Weld Neck, Slip-On, Blind, Socket Weld, Threaded, Lap Joint, Orifice, Spectacle Blind, etc.), across a wide range of NPS sizes, pressure classes, and facings. Our advanced processing capabilities allow for **custom machining and fabrication** to exact client drawings and specialized specifications, optimizing project timelines and reducing waste.
- Global Network of Dealers & Distributors: With a robust worldwide presence, including a vast network of trusted Dealers, Distributors, and Stockists, we ensure prompt availability, localized support, and efficient supply chains for our global clientele, reaching even remote project sites with F304H Stainless Steel Flanges.
- Expert Technical Consultation: Decades of specialized stainless steel flange expertise enable our seasoned technical team to provide unparalleled guidance on material selection, application suitability, optimal specifications, welding considerations, and compliance for your most critical and demanding projects involving F304H.
- Robust Worldwide Export & Logistics: As a dedicated Worldwide Exporter, we guarantee efficient and reliable global delivery with comprehensive documentation support (including HS Code 7307.21 verification and customs clearance assistance), ensuring smooth logistics and timely project completion across all continents for ASTM A182 F304H Stainless Steel Flanges.
- Competitive Pricing & Superior Value Proposition: Leveraging strategic global sourcing partnerships, streamlined operations, and optimized supply chains, we consistently deliver premium quality F304H flanges at highly competitive prices. Our products offer exceptional long-term value through enhanced safety, superior operational integrity, and improved overall project cost-effectiveness in severe high-temperature environments.
Request a Quote Today for Your ASTM A182 F304H Stainless Steel Flange Requirements!
Are you in search of reliable, high-quality ASTM A182 F304H Stainless Steel Flanges for your power generation, chemical processing, petrochemical, or industrial exhaust projects requiring superior high-temperature strength, creep resistance, and good oxidation resistance? Contact Dipti Metal Industries, your expert leading global ASTM A182 F304H Flanges manufacturer, ASTM A182 F304H Flanges stockist, ASTM A182 F304H Flanges supplier, ASTM A182 F304H Flanges dealer, ASTM A182 F304H Flanges distributor, and worldwide exporter of F304H flanges from Mumbai, India, today. Our dedicated team is ready to discuss your specific requirements including flange type (Weld Neck, Slip-On, Blind, etc.), nominal pipe size (NPS / DN), pressure class, facing (RF, FF, RTJ), quantity, applicable standards (ASME B16.5, B16.47, EN 1092-1), and any custom fabrication needs. Request a personalized, custom quote to secure the most effective and dependable F304H flange solutions that guarantee enhanced operational integrity and prolonged system life in diverse industrial environments. Remember to mention HS Code 7307.21 if relevant for your customs purposes.
Price guidance (non-binding): USD 6.00–1200.00 per piece depending on flange type, dimensions, pressure class, quantity, processing, and delivery terms. Final prices are quotation-based.
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ASTM A182 F304H Stainless Steel Flanges — Frequently Asked Questions
ASTM A182 F304H Stainless Steel Flanges are forged or rolled pipe flanges, fittings, and parts made from Grade F304H austenitic stainless steel, as specified by the ASTM A182 standard for high-temperature service. F304H is a high-carbon variant of the widely used 304 stainless steel. The "H" (High Carbon) designation means its carbon content is intentionally kept in the range of 0.04-0.10%, which significantly enhances its strength and creep resistance at elevated temperatures, typically above 538°C (1000°F). Dipti Metal Industries manufactures and exports a full range of F304H flanges for critical industrial applications globally.
F304H is preferred for high-temperature applications due to its controlled higher carbon content (0.04-0.10%) compared to standard 304 (0.08% max) and 304L (0.03% max). This higher carbon level contributes to:
- Enhanced High-Temperature Strength: At elevated temperatures (typically above 538°C / 1000°F), F304H maintains significantly better tensile and yield strength than lower-carbon 304 grades.
- Superior Creep Resistance: Creep is the tendency of a solid material to slowly move or deform permanently under the influence of persistent mechanical stresses. The higher carbon in F304H improves its resistance to this phenomenon, ensuring structural integrity over long periods at high temperatures.
ASTM A182 F304H and F316 are both austenitic stainless steels, but they are optimized for different primary benefits:
- Composition: F304H is a chromium-nickel stainless steel with higher carbon. F316 is a chromium-nickel-molybdenum stainless steel (2-3% Mo) with standard carbon (or low carbon in 316L).
- Corrosion Resistance: F304H offers good general corrosion resistance. F316, due to its molybdenum content, provides significantly superior resistance to pitting and crevice corrosion, especially in chloride-containing environments (e.g., seawater, certain acids).
- High-Temperature Performance: F304H's high carbon content specifically enhances its high-temperature strength and creep resistance for service above 538°C. While F316 also has good high-temperature strength, F304H is specifically tailored for applications where creep resistance is the primary concern.
ASTM A182 F304H Stainless Steel Flanges are specifically designed for high-temperature service. Due to its elevated carbon content, F304H is suitable for continuous service at temperatures typically above 538°C (1000°F) and up to approximately 870°C (1600°F). In this range, it maintains enhanced high-temperature tensile and creep strength, which is its key advantage over standard 304 or 304L. While it can be used at lower temperatures, its specific benefits are realized in elevated temperature applications found in power generation, industrial furnaces, and certain petrochemical processes where creep resistance is a critical design factor.
Yes, ASTM A182 F304H Stainless Steel Flanges are generally suitable for welding using common fusion welding processes. However, due to its higher carbon content (0.04-0.10%), there is an increased risk of **sensitization** (precipitation of chromium carbides at grain boundaries) if the material is exposed to temperatures between 427°C and 816°C (800°F and 1500°F) for prolonged periods during or after welding. For critical applications where these sensitizing temperatures cannot be avoided, a post-weld solution annealing treatment is often recommended to redissolve the carbides. Alternatively, for applications that will continuously operate at very high temperatures (e.g., above 816°C) where carbides are stable or redissolve, or for components operating below the sensitizing range, F304H performs well. Dipti Metal advises on proper welding procedures and filler materials to ensure optimal joint integrity.
Dipti Metal Industries supplies a comprehensive range of ASTM A182 F304H Stainless Steel Flange types to suit various piping system designs and operational requirements:
- Weld Neck Flanges: For high-pressure, high-temperature, or critical applications.
- Slip-On Flanges: Easy to align, for lower pressure systems.
- Blind Flanges: To seal the end of a piping system.
- Socket Weld Flanges: For small diameter, high-pressure lines.
- Threaded Flanges: For non-welded, low-pressure applications.
- Lap Joint Flanges: For ease of alignment and frequent dismantling.
- Orifice Flanges: For flow measurement.
- Spectacle Blind Flanges: For positive isolation of pipelines.
- We also offer Long Weld Neck, Reducing, Ring Type Joint (RTJ), and Plate Flanges.
For international shipping and customs purposes, the typical Harmonized System (HS) Code for ASTM A182 F304H Stainless Steel Flanges, along with other stainless steel flanges, is **7307.21**. This code specifically covers "Flanges of stainless steel" under the broader category of "Tube or pipe fittings (for example, couplings, elbows, sleeves), of iron or steel." While 7307.21 is the most common and generally applicable code, it's always advisable to confirm the exact HS code with a customs broker or relevant trade authority for your specific country of import to ensure accurate classification and avoid delays.
What Our Customers Say About Our ASTM A182 F304H Stainless Steel Flanges
“Dipti Metal's ASTM A182 F304H Weld Neck Flanges are perfect for our high-temperature furnace applications, providing excellent creep resistance and stability. Their quality and compliance with ASME standards are consistently reliable for critical service.”
— Industrial Furnace Engineer – Project Lead, Thermal Solutions Inc., Houston, USA
“We've sourced F304H Blind and Slip-On Flanges from Dipti Metal for steam and boiler piping. Their superior high-temperature strength is crucial for preventing deformation and ensuring safety. Reliable global deliveries and thorough documentation are highly valued.”
— Power Plant Maintenance Lead – Chief Engineer, PowerGen Maintenance, Düsseldorf, Germany
“For high-temperature sections of our chemical plant, Dipti Metal's ASTM A182 F304H Socket Weld Flanges provide the necessary strength and oxidation resistance. The material's weldability simplifies installation. We appreciate their consistent quality and technical support.”
— Chemical Plant Operations – Process Supervisor, Global Chemical Corp., Singapore
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Seaworthy export packing • Line-wise bagging & tagging • Full documentation & TPI.