Dipti Metal Industries is a premier ASTM A403 WP321 Manufacturer and UNS S32100 Fittings Supplier in Mumbai, India. We specialize in producing Titanium-stabilized (1.4541) buttweld fittings that offer superior resistance to intergranular corrosion and carbide precipitation during high-temperature service (800-1500°F). Our products are mill-certified and serve critical roles in petrochemical, aerospace, and power generation sectors across 65+ countries.
As a leading WP321 Fittings Stockist, we provide both Seamless (WP-S) and Welded (WP-W/WP-WX) construction types. Unlike standard 304/316, the addition of Titanium in Grade 321 makes it the material of choice for applications involving prolonged exposure to high heat.
Sizes: 1/2" to 48" NB (Standard & Heavy Wall)
Schedules: 5S, 10S, 40S, 80S, 160, XXS
construction: Seamless, ERW, EFW, Forged
Why Choose DIPTI® WP321 Fittings?
Our fittings undergo rigorous Intergranular Corrosion (IGC) Testing (Practice E) and 100% PMI testing to ensure Titanium stabilization is accurate, preventing localized corrosion at the weld-affected zones.
🧪 Technical Specifications: WP321 (UNS S32100)
Chemical Composition (%)
Grade
Carbon (C)
Mn
Si
Cr
Ni
Titanium (Ti)
WP321
0.08 max
2.00 max
1.00 max
17.0–19.0
9.0–12.0
5x(C+N) min - 0.70 max
Mechanical Performance
Tensile Strength (MPa)
Yield Strength (MPa)
Elongation (%)
Hardness (HB)
Density (g/cm³)
515 Min
205 Min
28% Min
192 Max
7.92
📦 Product Range & Construction Types
ASTM A403 WP321 90° / 45° Elbows
WP321 Equal & Reducing Tees
1.4541 Concentric & Eccentric Reducers
UNS S32100 Stub Ends (Long/Short)
WP321 End Caps & Bends
SS 321 Crosses & Laterals
WP321H (High Carbon) Fittings
ASTM A403 WP321 Pipe Fittings
Stainless Steel 321 Pipe Fittings
UNS S32100 Pipe Fittings
1.4541 Stainless Steel Fittings
WP321 Buttweld Fittings
ASTM A403 WP321H Fittings
SS 321 Buttweld Fittings
Wrought Austenitic Stainless Steel 321 Fittings
Titanium Stabilized Stainless Steel Fittings
Werkstoff 1.4541 Fittings
WP321 Seamless Fittings
WP321 Welded Fittings
ASME SA403 WP321
Grade 321 Stainless Steel Fittings
AISI 321 Pipe Fittings
SUS 321 Fittings
WP321 Corrosion Resistant Fittings
High Temperature Stainless Fittings 321
321 SS Industrial Fittings
ASTM A403 WP321-S
ASTM A403 WP321-W
ASTM A403 WP321-WX
ASME B16.9 WP321 Fittings
MSS SP-43 WP321 Fittings
1.4878 Stainless Steel Fittings
WP321-WU Fittings
UNS S32109 Pipe Fittings
ASTM A403 WP321 Material Spec
SS 321H High Carbon Fittings
W.Nr 1.4541 Buttweld Fittings
Titanium Bearing Stainless Fittings
Alloy 321 Pipe Fittings
Austenitic SS WP321 Fittings
WP321 Schedule 10S Fittings
WP321 Schedule 40S Fittings
WP321 Schedule 80S Fittings
WP321 Extra Heavy Fittings
WP321 Double Extra Strong Fittings
WP321 Standard Weight Fittings
UNS S32100 Industrial Fittings
1.4541 Metric Fittings
High Strength 321 Fittings
WP321 Pressure Piping Fittings
Heat Resistant SS 321 Fittings
WP321 Bevelled End Fittings
Product Type Keywords
WP321 90 Degree Elbow
WP321 45 Degree Elbow
WP321 Long Radius Elbow
WP321 Short Radius Elbow
WP321 Equal Tee
WP321 Reducing Tee
WP321 Concentric Reducer
WP321 Eccentric Reducer
WP321 Pipe Cap
WP321 Stub End
WP321 Lap Joint Stub End
WP321 Equal Cross
WP321 Reducing Cross
WP321 180 Degree Return Bend
WP321 Piggable Bend
WP321 5D Bend
WP321 3D Bend
WP321 Induction Bend
WP321 Lateral Tee
WP321 Barred Tee
WP321 Y-Tee
WP321 Pipe Bend
WP321 Mitre Elbow
321 SS 1D Elbow
321 SS 1.5D Elbow
321 SS 2D Elbow
WP321 Long Stub End
WP321 Short Stub End
WP321 Welded Tee
WP321 Seamless Elbow
WP321 Seamless Tee
WP321 Forged Elbow
WP321 Forged Tee
UNS S32100 90 Deg Elbow
UNS S32100 Reducing Tee
1.4541 Concentric Reducer
1.4541 Pipe Cap
ASTM A403 WP321 End Cap
WP321 22.5 Degree Elbow
WP321 Custom Bend
WP321 Hot Pressed Elbow
WP321 Cold Drawn Fittings
WP321 Fabricated Fittings
WP321 ERW Pipe Fittings
WP321 EFW Pipe Fittings
Sizes & Technical Keywords
1/2 inch WP321 Fittings
3/4 inch WP321 Fittings
1 inch WP321 Fittings
2 inch WP321 Fittings
3 inch WP321 Fittings
4 inch WP321 Fittings
6 inch WP321 Fittings
8 inch WP321 Fittings
10 inch WP321 Fittings
12 inch WP321 Fittings
14 inch WP321 Fittings
16 inch WP321 Fittings
18 inch WP321 Fittings
20 inch WP321 Fittings
24 inch WP321 Fittings
30 inch WP321 Fittings
36 inch WP321 Fittings
48 inch WP321 Fittings
Large Diameter WP321 Fittings
Small Diameter 321 Fittings
DN15 WP321 Fittings
DN25 WP321 Fittings
DN50 WP321 Fittings
DN100 WP321 Fittings
DN200 WP321 Fittings
DN300 WP321 Fittings
DN600 WP321 Fittings
WP321 Schedule 5S
WP321 Schedule 20S
WP321 Schedule 60S
WP321 Schedule 100
WP321 Schedule 120
WP321 Schedule 140
WP321 Schedule 160
WP321 XXS Wall Thickness
WP321 XS Wall Thickness
WP321 STD Wall Thickness
UNS S32100 Chemical Composition
WP321 Mechanical Properties
WP321 Tensile Strength
WP321 Yield Strength
WP321 Elongation
WP321 Brinell Hardness
WP321 Density Chart
WP321 Melting Point
WP321 Thermal Conductivity
WP321 Thermal Expansion
Titanium Content in SS 321
Stabilization Ratio 321 SS
WP321 IGC Practice E Test
WP321 PMI Testing
WP321 Radiography Test
WP321 Ultrasonic Test
WP321 Magnetic Permeability
Commercial Intent Keywords
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WP321 Fittings Catalog
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Certified WP321 Manufacturer
Dipti Metal Industries WP321
KMR Group WP321 Supplier
ASTM A403 WP321 India Price
WP321 Fittings with EN 10204 3.1
NACE MR0175 WP321 Supplier
PED Certified WP321 Fittings
IBR Approved 321 Fittings
WP321 Fittings TPI Inspection
SGS Approved WP321 Fittings
TUV Certified 1.4541 Fittings
WP321 Fittings for Export
Cheap WP321 Fittings India
Geographic Keywords (Global Focus)
WP321 Fittings Manufacturer Mumbai
WP321 Fittings Supplier India
WP321 Fittings Exporter Mumbai
WP321 Fittings Khetwadi Mumbai
WP321 Fittings Supplier Saudi Arabia
WP321 Fittings Supplier UAE
WP321 Fittings Supplier Qatar
WP321 Fittings Supplier Oman
WP321 Fittings Supplier Kuwait
WP321 Fittings Supplier Dubai
WP321 Fittings Supplier Abu Dhabi
WP321 Fittings Supplier USA
WP321 Fittings Supplier Houston
WP321 Fittings Supplier UK
WP321 Fittings Supplier Singapore
WP321 Fittings Supplier Malaysia
WP321 Fittings Supplier Indonesia
WP321 Fittings Supplier South Africa
WP321 Fittings Supplier Nigeria
WP321 Fittings Supplier Brazil
WP321 Fittings Supplier Egypt
WP321 Fittings Supplier Thailand
WP321 Fittings Supplier Vietnam
WP321 Fittings Supplier Australia
WP321 Fittings Supplier Iraq
WP321 Fittings Supplier Iran
WP321 Fittings Supplier Turkey
WP321 Fittings Supplier Germany
WP321 Fittings Supplier France
WP321 Fittings Supplier Italy
WP321 Fittings Stockist Riyadh
WP321 Fittings Supplier Dammam
WP321 Fittings Supplier Jubail
WP321 Fittings Supplier Sharjah
WP321 Fittings Supplier Doha
WP321 Fittings Supplier Muscat
WP321 Fittings Supplier Perth
WP321 Fittings Supplier Calgary
WP321 Fittings Supplier Johannesburg
WP321 Fittings Supplier Lagos
WP321 Fittings Manufacturer Ahmedabad
WP321 Fittings Supplier Chennai
WP321 Fittings Supplier Delhi
WP321 Fittings Supplier Kolkata
WP321 Fittings Manufacturer Maharashtra
Industry & Application Keywords
WP321 Fittings for Oil and Gas
WP321 Fittings for Petrochemical
WP321 Fittings for Power Plants
WP321 Fittings for Aerospace
WP321 Fittings for Chemical Industry
WP321 Fittings for Fertilizers
WP321 Fittings for Heat Exchangers
WP321 Fittings for Pressure Vessels
WP321 Fittings for Exhaust Systems
WP321 Fittings for Furnaces
WP321 Fittings for Boiler Piping
WP321 Fittings for Nuclear Power
WP321 Fittings for Desalination Plants
WP321 Fittings for Marine Applications
WP321 Fittings for Paper and Pulp
WP321 Fittings for Sugar Mills
WP321 Fittings for Food Processing
WP321 Fittings for Pharmaceutical
WP321 Fittings for Cryogenic Service
WP321 Fittings for Refinery Projects
WP321 Fittings for Water Treatment
WP321 Fittings for Mining Industry
WP321 Fittings for Off-Shore Drilling
WP321 Fittings for Pipeline Construction
WP321 Fittings for HVAC Systems
WP321 Fittings for High Pressure Gas
WP321 Fittings for Acid Processing
WP321 Fittings for Jet Engine Parts
WP321 Fittings for Thermal Power
WP321 Fittings for LNG Projects
Construction & Standard Variations
WP321 Seamless 90 Deg Elbow
WP321 Welded 90 Deg Elbow
WP321 Seamless Reducing Tee
WP321 Welded Reducing Tee
WP321 ERW 45 Deg Elbow
WP321 EFW Reducer
WP321 Radiography Tested Tee
WP321-S Buttweld Fittings
WP321-W Buttweld Fittings
WP321-WX Buttweld Fittings
WP321-WU Buttweld Fittings
ASTM A403 Class WP-S
ASTM A403 Class WP-W
ASTM A403 Class WP-WX
ASME B16.9 Butt Weld Fittings
ASME B16.28 Short Radius Elbow
ASME B16.49 Induction Bends
MSS SP-43 Type A Stub End
MSS SP-43 Type B Stub End
MSS SP-75 High Yield Fittings
WP321 Pickled and Passivated
WP321 Sand Blasted Finish
WP321 Mirror Polished Elbow
WP321 240 Grit Polished
WP321 320 Grit Polished
WP321 Black Painted Fittings
WP321 Anti-Rust Oil Coating
WP321 Transparent Oil Finish
WP321 Wood Case Packing
WP321 Seaworthy Export Packing
Long-Tail & Informational Keywords
What is ASTM A403 WP321?
Difference between WP321 and WP304
Difference between WP321 and WP316
Difference between WP321 and WP347
WP321 maximum operating temperature
WP321 corrosion resistance vs 304
Titanium stabilization in WP321 fittings
WP321 carbide precipitation resistance
How to weld WP321 stainless steel?
WP321 welding filler wire recommendation
WP321 vs 1.4541 equivalent
UNS S32100 vs SUS 321
ASTM A403 WP321 pressure rating chart
WP321 weight calculator online
WP321 dimensions in mm
WP321 dimensions in inches
Standard for stainless steel 321 fittings
ASTM specification for WP321 fittings
WP321 fittings for sulfuric acid
WP321 fittings for nitric acid
Is WP321 magnetic?
WP321 thermal expansion coefficient
WP321 annealing temperature
WP321 hardness testing results
WP321 pipe fitting manufacturing process
WP321 hot forming vs cold forming
WP321 IGC test report sample
WP321 PMI test procedure
Reliable 321 fittings exporter India
Top rated WP321 manufacturer Mumbai
Specific Combinations (300-500)
WP321 1/2" Sch 10S Elbow
WP321 1" Sch 40S Tee
WP321 2" Sch 80S Reducer
WP321 4" Sch 40S Cap
WP321 6" Sch 10S Stub End
WP321 8" Sch 40S 90 Deg Elbow
WP321 10" Sch STD Equal Tee
WP321 12" Sch XS Reducer
WP321 24" Sch 40S Welded Elbow
WP321 36" Sch 10S Welded Tee
WP321 48" Large Diameter Reducer
UNS S32100 3D Pipe Bend
UNS S32100 5D Pipe Bend
UNS S32100 Short Stub End
UNS S32100 Long Stub End
1.4541 Stainless Steel 45 Deg Elbow
1.4541 Stainless Steel Equal Tee
1.4541 Stainless Steel Concentric Reducer
1.4541 Stainless Steel Eccentric Reducer
1.4541 Stainless Steel Pipe Cap
ASTM A403 WP321 Mitre Bend
ASTM A403 WP321 Lateral Cross
ASTM A403 WP321 Reducing Cross
ASTM A403 WP321 Y-Shape Tee
ASTM A403 WP321 Bullhead Tee
WP321 Fittings for High Heat Exhaust
WP321 Fittings for Jet Engines
WP321 Fittings for Furnace Parts
WP321 Fittings for Heat Treatment Baskets
WP321 Fittings for Thermal Oxidizers
WP321 Fittings for Chemical Tankers
WP321 Fittings for LNG Carriers
WP321 Fittings for Sour Service
WP321 Fittings for H2S Environment
NACE MR0103 WP321 Fittings
ASTM A262 Practice A 321 SS
ASTM A262 Practice C 321 SS
WP321 Fittings for High Pressure Steam
WP321 Fittings for Superheaters
WP321 Fittings for Reheaters
WP321 Fittings for Boiler Headers
WP321 Fittings for Cryogenic Tanks
WP321 Fittings for Liquid Oxygen
WP321 Fittings for Liquid Nitrogen
WP321 Fittings for Food Grade Tubing
WP321 Fittings for Dairy Industry
WP321 Fittings for Beverage Industry
WP321 Fittings for Biotech Applications
WP321 Fittings for Semiconductor Industry
WP321 Fittings for Vacuum Systems
WP321 Fittings for High Temperature Ducting
WP321 Fittings for Expansion Joints
WP321 Fittings for Bellows Construction
WP321 Fittings for Flexible Hoses
WP321 Fittings for Hydraulic Systems
WP321 Fittings for Pneumatic Systems
WP321 Fittings for Fire Protection Systems
WP321 Fittings for HVAC Chillers
WP321 Fittings for Geothermal Power
WP321 Fittings for Solar Thermal Plants
WP321 Fittings for Biofuel Refineries
WP321 Fittings for Carbon Capture Plants
WP321 Fittings for Hydrogen Piping
WP321 Fittings for Ammonia Plants
WP321 Fittings for Ethylene Crackers
WP321 Fittings for Styrene Monomer Plants
WP321 Fittings for PTA Plants
WP321 Fittings for Polymer Industry
WP321 Fittings for Plastic Manufacturing
WP321 Fittings for Synthetic Fiber Plants
WP321 Fittings for Glass Industry
WP321 Fittings for Ceramic Kilns
WP321 Fittings for Cement Plants
WP321 Fittings for Steel Mills
WP321 Fittings for Aluminum Smelters
WP321 Fittings for Copper Refineries
WP321 Fittings for Gold Processing
WP321 Fittings for Uranium Enrichment
WP321 Fittings for Heavy Water Plants
WP321 Fittings for Research Laboratories
WP321 Fittings for Testing Facilities
WP321 Fittings for Prototype Development
WP321 Fittings for Specialized Engineering
WP321 Fittings for Custom Fabrication
WP321 Fittings for OEM Supply
WP321 Fittings for EPC Projects
WP321 Fittings for Turnkey Solutions
WP321 Fittings for Global Logistics
WP321 Fittings for Urgent Shutdowns
WP321 Fittings for Maintenance and Repair
WP321 Fittings for Plant Expansion
WP321 Fittings for Modernization Projects
WP321 Fittings for Cost-Effective Solutions
WP321 Fittings for Long-Term Durability
WP321 Fittings for Extreme Environments
WP321 Fittings for Safety-Critical Systems
WP321 Fittings for Compliance Assurance
WP321 Fittings for Documentation Support
WP321 Fittings for Mill Test Certification
WP321 Fittings for Quality Inspection
WP321 Fittings for Customer Satisfaction
WP321 Fittings for Technical Support
WP321 Fittings for Engineering Expertise
WP321 Fittings for Industrial Reliability
WP321 Fittings for Global Standards
WP321 Fittings for ASTM Compliance
WP321 Fittings for ASME Standards
WP321 Fittings for ANSI B16.9
WP321 Fittings for MSS Standards
WP321 Fittings for DIN Standards
WP321 Fittings for EN Standards
WP321 Fittings for JIS Standards
WP321 Fittings for GOST Standards
WP321 Fittings for AFNOR Standards
WP321 Fittings for BS Standards
WP321 Fittings for ISO Standards
WP321 Fittings for API Standards
WP321 Fittings for AWWA Standards
WP321 Fittings for CSA Standards
WP321 Fittings for AS Standards
WP321 Fittings for EEMUA Standards
WP321 Fittings for NORSOK Standards
Our Global Reach: Serving Countries Worldwide
DIPTI Metal Industries is a truly global 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.