DIPTI METAL INDUSTRIES
ASTM A193 B7M Stud Bolts Manufacturer, Exporter & Supplier in Mumbai, India | NACE Sour Service
Dipti Metal Industries is a leading A193 B7M Stud Bolts Manufacturer, ASTM A193 B7M Exporter, and Worldwide ASTM A193 B7M Supplier from Mumbai, India. We specialize in high-quality ASTM A193 Grade B7M Stud Bolts specifically designed for sour service applications (NACE MR0175/ISO 15156 compliant). Our bolts feature precise heat treatment to control hardness (max 22 HRC), ensuring superior resistance to sulfide stress cracking (SSC) in critical oil & gas and petrochemical environments.
We offer a comprehensive range of diameters and lengths, supplied with compatible ASTM A194 Grade 2HM heavy hex nuts. Available finishes include PTFE/Fluoropolymer (Xylan) and Hot-dip Galvanized, all conforming to ASME B16.5 and API standards.
Leadership in B7M Stud Bolt Manufacturing
Recognized globally as a premier B7M Stud Bolt Manufacturer in Mumbai, Dipti Metal Industries provides essential bolting solutions for critical applications. Our A193 B7M Alloy Steel Stud Bolts are engineered from heat-treated chromium-molybdenum alloy steel with strict hardness control to prevent cracking in H2S environments.
Our commitment to precision manufacturing and rigorous quality control—including 100% hardness testing and full traceability—makes us the trusted partner for dependable sour service fastening solutions globally. We supply B7M Stud Bolts with 2H Nuts (or specifically 2HM for full NACE compliance).
Compliance & Standards
- Material: ASTM A193 Grade B7M
- NACE: NACE MR0175 / ISO 15156
- Threads: ASME B1.1 (UNC/UNF/8UN)
- Dimensions: ASME B16.5 / B16.47
- Nuts: ASTM A194 Grade 2HM
Our A193 B7M Fastener Range
We manufacture custom sizes and standard stock items.
Stud Bolt Types
- ASTM A193 B7M Threaded Rod
- A193 B7M Double End Stud
- A193 B7M Fully Threaded Stud
- A193 B7M Tap End Stud
Matching Components
- A193 B7M Heavy Hex Bolts
- B7M Stud Bolts with A194 2HM Nuts
- NACE MR0175 Compliant Washers
- A193 B7M Nuts and Bolts
Coatings & Finishes
- PTFE Coated B7M Stud Bolts
- Hot Dip Galvanized B7M Stud Bolts
- Zinc Coated B7M Bolts
- Black Oxide / Phosphate
Technical Specifications & Data
| Property | Value (Imperial) | Value (Metric) |
|---|---|---|
| B7M Tensile Strength (min) | 100 ksi | 690 MPa |
| B7M Yield Strength (min) | 80 ksi | 550 MPa |
| Elongation in 4D (min) | 18% | 18% |
| B7M Reduction of Area (min) | 50% | 50% |
| B7M Hardness Range (Max) | 22 HRC | 235 HBW |
| Element | Content % |
|---|---|
| Carbon (C) | 0.37 - 0.49 |
| Manganese (Mn) | 0.65 - 1.10 |
| Phosphorus (P) | 0.035 max |
| Sulfur (S) | 0.040 max |
| Silicon (Si) | 0.15 - 0.35 |
| Chromium (Cr) | 0.75 - 1.20 |
| Molybdenum (Mo) | 0.15 - 0.25 |
The main Difference Between B7 and B7M lies in the heat treatment and hardness. ASTM A193 B7M is tempered at a higher temperature to limit hardness to a maximum of 22 HRC, making it resistant to Hydrogen Sulfide (Sour Gas). Standard B7 is stronger but harder, making it susceptible to sulfide stress cracking in sour environments.
Applications & Industries
- B7M Fasteners for Oil & Gas
- B7M Stud Bolts for Petrochemical
- B7M Stud Bolts for Refinery
- B7M Studs for Sour Service
- B7M Bolts for Offshore Platforms
- A193 B7M for High Pressure Service
- ASTM A193 B7M for Valve Assemblies
- B7M Fasteners for Heat Exchangers
- B7M Bolts for Boilers
- A193 B7M in Pressure Vessels
Our Global Reach: Serving Countries Worldwide
DIPTI Metal Industries is a truly global B7M Stud Bolts exporter, proudly supplying certified industrial piping materials, fasteners, gaskets, and valves to a vast network of clients across every continent. Our extensive logistics capabilities ensure reliable and on-time delivery to major industrial hubs and ports around the world.
- India: Mumbai, Delhi, Chennai, Kolkata, Bangalore, Hyderabad
- UAE: Dubai, Abu Dhabi, Sharjah, Jebel Ali
- Saudi Arabia: Riyadh, Jeddah, Dammam, Jubail
- Qatar: Doha, Ras Laffan
- Oman: Muscat, Sohar, Salalah
- Kuwait: Kuwait City, Ahmadi
- Bahrain: Manama, Sitra
- Iraq: Baghdad, Basra, Erbil
- Iran: Tehran, Bandar Abbas, Isfahan
- Singapore: Singapore City
- Malaysia: Kuala Lumpur, Port Klang, Johor Bahru
- Indonesia: Jakarta, Surabaya, Balikpapan
- Thailand: Bangkok, Rayong, Laem Chabang
- Vietnam: Ho Chi Minh City, Hanoi, Haiphong
- Philippines: Manila, Cebu, Davao
- China: Shanghai, Beijing, Guangzhou, Tianjin, Qingdao
- Japan: Tokyo, Osaka, Nagoya, Yokohama
- South Korea: Seoul, Busan, Ulsan, Incheon
- Bangladesh: Dhaka, Chittagong
- Sri Lanka: Colombo, Kandy
- Myanmar: Yangon, Mandalay
- Kazakhstan: Nur-Sultan, Almaty, Atyrau
- Uzbekistan: Tashkent, Samarkand
- Turkmenistan: Ashgabat, Turkmenbashi
- Azerbaijan: Baku, Ganja
- Jordan: Amman, Aqaba
- Lebanon: Beirut, Tripoli
- Syria: Damascus, Aleppo (subject to trade regulations)
- Yemen: Sana'a, Aden (subject to trade regulations)
- Mongolia: Ulaanbaatar
- Nepal: Kathmandu
- Cambodia: Phnom Penh
- Laos: Vientiane
- Brunei: Bandar Seri Begawan
- Taiwan: Taipei, Kaohsiung
- Germany: Frankfurt, Hamburg, Munich, Düsseldorf, Berlin
- United Kingdom: London, Aberdeen, Manchester, Glasgow, Liverpool
- Netherlands: Rotterdam, Amsterdam, The Hague
- France: Paris, Marseille, Lyon, Le Havre, Bordeaux
- Italy: Milan, Rome, Genoa, Venice, Naples
- Spain: Madrid, Barcelona, Valencia, Bilbao
- Russia: Moscow, Saint Petersburg, Kazan, Novorossiysk
- Poland: Warsaw, Krakow, Gdansk
- Belgium: Antwerp, Brussels, Ghent
- Sweden: Stockholm, Gothenburg, Malmö
- Norway: Oslo, Bergen, Stavanger, Trondheim
- Finland: Helsinki, Tampere, Turku
- Denmark: Copenhagen, Aarhus, Odense
- Portugal: Lisbon, Porto, Sines
- Greece: Athens, Thessaloniki, Patras
- Turkey: Istanbul, Ankara, Izmir
- Switzerland: Zurich, Geneva, Basel
- Austria: Vienna, Salzburg, Linz
- Ireland: Dublin, Cork
- Czech Republic: Prague, Brno
- Romania: Bucharest, Constanta
- Ukraine: Kyiv, Odesa (subject to current events)
- Hungary: Budapest, Debrecen
- Croatia: Zagreb, Split
- Serbia: Belgrade, Novi Sad
- Bulgaria: Sofia, Varna
- Slovakia: Bratislava, Kosice
- Lithuania: Vilnius, Kaunas
- Latvia: Riga, Liepāja
- Estonia: Tallinn, Tartu
- Slovenia: Ljubljana, Maribor
- Cyprus: Nicosia, Limassol
- Malta: Valletta, Birkirkara
- Iceland: Reykjavik
- Luxembourg: Luxembourg City
- Belarus: Minsk, Gomel (subject to trade regulations)
- Bosnia and Herzegovina: Sarajevo
- North Macedonia: Skopje
- Albania: Tirana, Durres
- Moldova: Chisinau
- Montenegro: Podgorica
- Kosovo: Pristina
- USA: Houston, Los Angeles, New York, Chicago, New Orleans, Philadelphia
- Canada: Calgary, Edmonton, Vancouver, Toronto, Montreal, Halifax
- Mexico: Mexico City, Monterrey, Guadalajara, Veracruz, Ciudad del Carmen
- Panama: Panama City, Colón
- Trinidad & Tobago: Port of Spain, San Fernando
- Costa Rica: San José, Puerto Limón
- Guatemala: Guatemala City, Puerto Quetzal
- Honduras: Tegucigalpa, Puerto Cortés
- Nicaragua: Managua, Corinto
- El Salvador: San Salvador, Acajutla
- Jamaica: Kingston, Montego Bay
- Dominican Republic: Santo Domingo, Santiago
- Cuba: Havana, Santiago de Cuba (subject to trade regulations)
- Bahamas: Nassau, Freeport
- Barbados: Bridgetown
- Puerto Rico: San Juan
- Belize: Belize City
- Brazil: São Paulo, Rio de Janeiro, Salvador, Curitiba, Santos
- Argentina: Buenos Aires, Cordoba, Rosario, Bahia Blanca
- Chile: Santiago, Valparaíso, Concepción, Antofagasta
- Colombia: Bogotá, Medellín, Cartagena, Barranquilla
- Peru: Lima, Callao, Arequipa, Trujillo
- Venezuela: Caracas, Maracaibo, Puerto La Cruz (subject to trade regulations)
- Ecuador: Quito, Guayaquil, Manta
- Bolivia: La Paz, Santa Cruz, Cochabamba
- Uruguay: Montevideo, Salto
- Paraguay: Asunción, Ciudad del Este
- Guyana: Georgetown
- Suriname: Paramaribo
- French Guiana: Cayenne
- South Africa: Johannesburg, Durban, Cape Town, Sasolburg
- Nigeria: Lagos, Port Harcourt, Abuja, Kano
- Egypt: Cairo, Alexandria, Port Said, Suez
- Algeria: Algiers, Oran, Skikda
- Morocco: Casablanca, Rabat, Tangier
- Angola: Luanda, Lobito
- Kenya: Nairobi, Mombasa
- Tanzania: Dar es Salaam, Mwanza
- Ghana: Accra, Tema, Kumasi
- Mozambique: Maputo, Beira
- Cameroon: Douala, Yaoundé
- Libya: Tripoli, Benghazi (subject to current events)
- Tunisia: Tunis, Sfax
- Ethiopia: Addis Ababa, Dire Dawa
- Côte d'Ivoire: Abidjan
- Senegal: Dakar
- Zambia: Lusaka, Ndola
- Zimbabwe: Harare, Bulawayo
- DR Congo: Kinshasa, Lubumbashi
- Sudan: Khartoum, Port Sudan (subject to current events)
- Uganda: Kampala, Entebbe
- Gabon: Libreville, Port-Gentil
- Mauritius: Port Louis
- Reunion: Saint-Denis
- Djibouti: Djibouti City
- Eritrea: Asmara, Massawa
- Somalia: Mogadishu (subject to current events)
- Australia: Sydney, Melbourne, Perth, Brisbane, Adelaide, Darwin
- New Zealand: Auckland, Wellington, Christchurch
- Papua New Guinea: Port Moresby, Lae
- Fiji: Suva, Nadi
- New Caledonia: Nouméa
- Solomon Islands: Honiara
- Vanuatu: Port Vila
- Samoa: Apia
- Tonga: Nukuʻalofa
- Kiribati: South Tarawa
- Micronesia: Palikir
- Marshall Islands: Majuro
- Palau: Ngerulmud
- Tuvalu: Funafuti
- Nauru: Yaren
What Our Customers Say
"Dipti Metal supplied NACE-compliant ASTM A193 B7M stud bolts with A194 2HM nuts (PTFE coated) for our sour gas processing facility. The hardness control and SSC resistance are absolutely critical."
— Oil & Gas Production Engineer, ADNOC, UAE
"We use Dipti Metal's B7M stud bolts in sections exposed to H2S where a balance of strength and NACE compliance is essential. The hot-dip galvanized finish provides excellent protection."
— Piping Integrity Lead, Sabic, Saudi Arabia
Frequently Asked Questions
The primary difference is hardness and strength. B7M is heat-treated and tested to ensure 100% of pieces are below 22 HRC (235 HB) to comply with NACE MR0175 for sour service. Standard B7 has higher tensile strength but is susceptible to cracking in H2S environments.
ASTM A194 Grade 2HM Heavy Hex Nuts are the correct compatible nuts. They are also heat-treated to control hardness, making them suitable for NACE sour service applications alongside B7M studs.
Yes, we provide a full B7M Stud Bolt Manufacturer Certificate (MTC EN 10204 3.1) with every shipment, detailing chemical analysis, mechanical properties, and hardness test results.
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