Stainless steel pipe fittings come in a variety of types, sizes, and grades. Two of the most common are grade 321 and grade 321H. Both are made of chromium-nickel stainless steel alloys that offer high strength and excellent corrosion resistance.


SS Grades 321/321H Butt weld Pipe Fittings Stockists, ASTM A403 Stainless Steel WP321H Pipe Elbow, WP321 Stainless Steel Buttweld Tee Dealer, SS 321 Pipe Fittings, Stainless Steel WP321 Pipe Fittings, WP321H SS Butt weld Pipe Fittings, Alloy 321H Pipe Fittings, Steel 321 Pipe Fittings Suppliers, Stainless Steel 321H ASME SA403M Buttweld Reducer, Distributors of Stainless Steel WP321 Buttweld Fittings in Mumbai, India.

Grade 321 (also known as UNS S32100) is titanium stabilized austenitic stainless steel that offers good strength and excellent corrosion resistance at temperatures up to about 900°C (1650°F). Steel 321 Pipe Fittings also has good resistance to oxidation in intermittent service up to 870°C (1600°F). The alloy offers improved intergranular corrosion resistance after welding or stress relieving. Stainless Steel 316H Pipe Fittings, Stainless Steel 316TI Pipe Fittings and many more grades are also available.


UNS S32109 SS 45°/90°/180° Butt weld Elbow, UNS S32100 Stainless Steel Welded Pipe Fittings Suppliers, Stainless Steel 321H Equal Tee Wholesaler, SS 321H Pipe Fittings, Grade WP321 Stainless Steel Unequal Cross Exporters, ASME B16.28 WP321H SS Butt weld Reducing Tee, WP321 SS ANSI B16.9 Short & Long Radius Elbow, Type 321/321H Austenitic Stainless Steel Butt weld Seamless Pipe Fitting.

What is Grade 321H?

Grade 321H (UNS S32109) is a higher carbon version of grade 321 stainless steel. It provides an even better level of corrosion resistance than grade 321 due to its increased carbon content. This makes it ideal for applications that require superior weldability, such as aircraft exhaust systems, automotive headers, manifolds, mufflers and tailpipes, steam superheater tubes, expansion joints, boiler tubes, heat exchanger tubing and condenser tubing.

Stainless Steel 321/321H Pipe Fittings

Stainless Steel 321/321H Pipe Fittings

Stainless Steel 321 Pipe Fittings can be used in both general service industries specialty applications where their high temperature metallurgical properties are required. This includes processing industries such as petrochemical plants, power plants, oil refineries, chemical plants and pulp/paper mills. ASTM A403 Stainless Steel WP321H Pipe Fittings can also be used for architectural applications such as handrails or balustrades in commercial buildings or residential dwellings. Moreover, they are commonly used for food processing equipment such as dairy processing equipment or brewing systems.

Stainless Steel 321H Pipe Fittings can be found in aircraft exhaust systems or automotive headers where their superior weldability is needed.Stainless Steel WP321 Pipe Fittings are available in two main grades: grade 321 and grade 321H pipe fittings. Both grades offer high strength and excellent corrosion resistance, however, grade 321H offers the added benefit of superior weldability due to its higher carbon content when compared with grade321 stainless steel pipe fittings. Grade321 can be used for a variety of general service industries while Grade321H has specific uses within highly specialized fields such as aircraft exhausts or automotive headers where superior weldability is needed. Different types of products are available, such as Duplex Steel UNS S31803 Round Bars, Duplex Steel ASTM A479 UNS S32205 Nuts, etc.

What is Stainless Steel 321 and why is it used for pipe fittings?

Stainless Steel 321 is a type of austenitic stainless steel that contains titanium as a stabilizing element. It has excellent corrosion resistance and high-temperature strength, making it a popular choice for use in high-temperature applications such as pipe fittings.

What are the benefits of using Stainless Steel 321 pipe fittings?

Stainless Steel 321 pipe fittings offer several benefits, including excellent corrosion resistance, high-temperature strength, and good weldability. They are also resistant to intergranular corrosion and have good oxidation resistance.

What are the applications of Stainless Steel 321H pipe fittings?

Stainless Steel 321H is a high carbon version of Stainless Steel 321 and is known for its excellent high-temperature strength and corrosion resistance. Stainless Steel 321H pipe fittings are used in a variety of applications across many industries.

MSS SP-79 Stainless Steel 321 End Pipe Cap Suppliers, Werkstoff No 1.4878 SS Butt weld Eccentric Reducer Traders, ASTM A403 WP321 Pipe Fittings, DIN 1.4541 Stainless Steel Concentric Reducer, SS 321H MSS-SP-43 Buttweld Swage Nipple, Stainless Steel SUS 321 Stub Ends Exporters.

SS 321/321H Butt weld Pipe Fittings Specification

SpecificationsASTM A403 / ASME SA403

DimensionsASME/ANSI B16.9, ASME B16.28, MSS-SP-43, MSS SP-79

Size1/8” NB TO 48” NB. (Seamless & 100% X-Ray Welded, Fabricated)

Type Seamless / Welded / Fabricated

Bending RadiusR=1D, 2D, 3D, 5D, 6D, 8D, 10D or Custom

Thickness Sch 5s, Sch 10s, Sch 40s, Sch 80s, Sch 160s, Sch XXS

Grade 321/321H UNS (S32100, S32109), DIN (1.4541, 1.4878)

Get Quote

Stainless Steel WP321/321H Butt weld Fittings Equivalent Indian Standard

STANDARD WERKSTOFF NR. UNS JIS EN
SS 321 1.4541 S32100 SUS 321 X6CrNiTi18-10
SS 321H 1.4878 S32109 SUS 321H X12CrNiTi18-9

ASTM A403 SS WP321/321H Pipe Fittings Chemical Composition

Grade C Mn Si P S Cr N Ni Ti
SS 321 0.08 max 2.0 max 1.0 max 0.045 max 0.030 max 17.00 - 19.00 0.10 max 9.00 - 12.00 5(C+N) – 0.70 max
SS 321H 0.04 – 0.10 2.0 max 1.0 max 0.045 max 0.030 max 17.00 - 19.00 0.10 max 9.00 – 12.00 4(C+N) – 0.70 max

WP321/321H Stainless Steel ASME SA403 Butt weld Fittings Mechanical Properties

Density Melting Point Tensile Strength Yield Strength (0.2%Offset) Elongation
8.0 g/cm3 1457 °C (2650 °F) Psi – 75000 , MPa – 515 Psi – 30000 , MPa – 205 35 %

Other Types of 321/321H Stainless Steel Butt weld Pipe Fittings

  • Stainless Steel WP321 Elbow
  • WP321H Stainless Steel Pipe Tee
  • Stainless Steel WP321 Buttweld Cross
  • SS 321 Butt weld Pipe Reducer
  • Stainless Steel 321H End Cap

Stainless Steel WP321 Pipe Fittings, 321H SS Buttweld Fittings, WP321 Steel Pipe Fittings, Stainless Steel WP321H Butt weld Pipe Fittings, Stainless Steel WP321 Pipe Fittings, Stainless Steel WP321H Butt Weld Pipe Fittings, WP321 Stainless Steel Butt weld Fittings, SS Pipe Fittings, SS 321 Buttweld Elbow, Stainless Steel 321H Pipe Elbow Stockists, ASTM A403 Stainless Steel 321 Butt weld Elbow, WP321 Stainless Steel Austenitic 45Deg. Pipe Elbow, SS WP321H 90° Degree Elbow, Steel SUS 321 180 Degree Elbow Traders, MSS-SP-43 321 Short Radius Elbow, MSS SP-79 Steel WP321 LR Elbow, ANSI B16.9 Stainless Steel WP321H SR Elbow, WP321 SS ASME SA403 Long Radius Elbow, Stainless Steel Grades in 321/321H R=1D, 2D, 3D, 5D, 6D, 8D, 10D Butt weld Elbow, Werkstoff No 1.4541 Stainless Steel Buttweld Tee, Stainless Steel DIN 1.4878 Equal Tee, UNS S32100 Stainless Steel Unequal Tee, Steel 321 Reducing Tee Stockholder, 321H Fabricated Tee Supplier, EN X6CrNiTi18-10 / X12CrNiTi18-9 Steel 321 Buttweld Reducers, Supplier of Stainless Steel WP321 Concentric Reducer, WP321H SS A403 Concentric Reducer, Manufacturer of Eccentric Reducer Traders, Stainless Steel WP321 Butt weld Pipe Cross, ASME B16.28 SS WP321 Equal Cross Dealer, Stainless Steel and Austenitic Unequal Cross Stockholders, UNS S32109 Stainless Steel Reducing Cross Dealers in India, SA403 SS 321 End Pipe Cap Wholesaler, Stainless Steel 321H Buttweld Pipe Cap, Supplier of Stainless Steel 321H End Cap, 321 Stainless Steel Butt weld Seamless Pipe Fittings Stockholders, Exporters of Steel WP321 Welded Pipe Fittings, ASTM A403M SS WP321H Stub End Stockists

We are Suppliers and Exporters of Stainless Steel 321/321H Pipe Fittings in Cities Like

Thiruvananthapuram, Doha, Milan, La Victoria, Colombo, Singapore, Secunderabad, Pimpri-Chinchwad, Visakhapatnam, Ho Chi Minh City, Surat, Chennai, Mexico City, Dallas, Gurgaon, Cairo, Jaipur, Jakarta, Ernakulam, Kanpur, Chiyoda, Al Jubail, Hyderabad, Faridabad, Noida, London, Aberdeen, Port-of-Spain, Lagos, Australia, Haryana, Moscow, Howrah, Petaling Jaya, Al Khobar, Dammam, Sydney, Sharjah, Algiers, Mumbai, Karachi, Manama, Indore, Jeddah, Seoul, Courbevoie, Los Angeles, Nashik, Ahvaz, Hanoi, Santiago, Baroda, Edmonton, Muscat, Dubai, Bangkok, Granada, Thane, Kuwait City, Kolkata, Nagpur, Chandigarh, Ludhiana, Rajkot, Geoje-si, Brisbane, Ulsan, Rio de Janeiro, Gimhae-si, Turkey, Riyadh, Ahmedabad, Istanbul, Atyrau, Bogota, Perth, Kuala Lumpur, Houston, Montreal, Navi Mumbai, Calgary, Pune, Lahore, Vadodara, New Delhi, Abu Dhabi, Hong Kong, Bhopal, Ranchi, Bengaluru, Caracas, Vung Tau, New York, Coimbatore, Jamshedpur, Tehran, Madrid, Busan, Toronto.

We are Suppliers and Exporters of 321/321H SS Butt weld Fittings in Countries Like

Estonia, Portugal, Ireland, Mexico, New Zealand, Ghana, Azerbaijan, mexico, srilanka, thailand, malaysia, Philippines, India, Turkey, Lithuania, Bolivia, Kuwait, Italy, Bahrain, Austria, Indonesia, Croatia, Yemen, Taiwan, Puerto Rico, Afghanistan, Venezuela, Gambia, Romania, Thailand, Slovakia, United Arab Emirates, Denmark, cyprus, Ecuador, Jordan, Mexico, Mongolia, Canada, Japan, Sri Lanka, Costa Rica, China, Bulgaria, Kenya, Chile, Netherlands, Morocco, Norway, Hungary, Poland, Bhutan, Vietnam, Nigeria, Switzerland, France, Oman, Namibia, Qatar, Macau, Poland, Nigeria, Saudi Arabia, Hong Kong, Ukraine, Russia, Spain, Zimbabwe, Gabon, Tibet, brazil, South Korea, United Kingdom, Kazakhstan, South Africa, Sweden, Lebanon, Singapore, Germany, Brazil, Bangladesh, Czech Republic, Peru, Libya, Malaysia, Argentina, Trinidad & Tobago,Tunisia, United States, Greece, Colombia, Australia, Finland, Belgium, Nepal, Algeria, Israel, Chile, Belarus, Serbia, Egypt.