Stainless Steel 321 / 321H Pipe Fittings Manufacturer

Stainless Steel 321 Pipe Fittings are made up of an alloy that contains chromium and nickel. The difference between the two is that 321H has a higher carbon content, which increases its strength at high temperatures. Both are austenitic stainless steels that have excellent resistance to oxidation and corrosion.

One of the main benefits of Stainless Steel 321H Pipe Fittings is their high corrosion resistance, making them ideal in harsh environments or industries where chemical exposure is common. They also have excellent heat resistance & are often used in high-temperature applications. SS 1.4878 Pipe Fittings are durable and long-lasting, requiring minimal maintenance, making them a cost-effective choice.

Stainless Steel 321 Pipe Fittings are commonly used in the chemical, petrochemical, and pharmaceutical industries. Due to their excellent corrosion resistance, they are ideal for use in harsh or corrosive environments. They are also used in heat exchangers, radiography devices & food processing equipment. ASTM A403 WP 321H Pipe Fittings are used in the transportation industry for fuel lines and exhaust systems. We provide an extensive range of products, such as Nickel Alloy 201 Forged Fittings,Titanium Grade 5 Flanges, and many others.

UNS S32100 Butt Weld Fittings possess notable properties that make them valuable components in industrial systems. Their high-temperature stability is a standout feature, as they can maintain their strength and corrosion resistance even in elevated temperature environments. This attribute is particularly useful in applications involving exhaust systems, furnaces, and other heat-intensive processes. SS 321 Pipe Fittings exhibit exceptional corrosion resistance, thanks to their composition rich in chromium and nickel. The high-quality stainless steel  products we provide at Global Steel include Stainless Steel 347 Pipe Fittings, Stainless Steel 904L Pipe Fittings and more.

This makes them suitable for handling corrosive fluids and gases in chemical processing and petrochemicals. SS 321H Pipe Fittings are known for their weldability and formability, which streamline installation processes and allow for versatile designs. Their combination of high-temperature resistance, corrosion resistance, and ease of fabrication contributes to their importance in ensuring reliable fluid transportation and control in various industrial sectors.

What is SS 321H Pipe Fitting?

SS 321H Pipe Fittings are components used in installing, connecting, and maintaining piping systems made from stainless steel grade 321H. Stainless Steel 321H is a high-carbon version of 321, offering enhanced creep resistance at elevated temperatures.

In which industries are SS 321H Pipe Fittings commonly used?

SS 321H Pipe Fittings are applied in industries with high-temperature and corrosive conditions. Some common industries include petrochemical, chemical processing, power generation, heat exchangers, and furnace components. Their resistance to oxidation and scaling makes them valuable in applications involving combustion gases and hot liquids.

What are the characteristics of Stainless Steel 321 Pipe Fittings?

Stainless Steel 321 Pipe Fittings possess excellent corrosion resistance, making them suitable for corrosive environment applications. They also offer good mechanical properties at elevated temperatures, rendering them ideal for high-temperature applications.

Specification of SS 321,321H Pipe Fittings

Standards ASTM A403 / ASME SA403
Dimensions ASME/ANSI B16.9, ASME B16.28, MSS-SP-43, BS4504, BS4504, BS1560, BS10
  • Seamless Butt Weld Fittings : 1/2″ – 10″
  • Welded Butt Weld Fittings : 1/2″ – 48″
Type Seamless / Welded / Fabricated
Thickness SCH10, SCH20, SCH30, STD SCH40, SCH60, XS, SCH 80, SCH 100, SCH 120, SCH 140, SCH 160, XXS available with NACE MR 01-75
Bending Radius R=1D, 2D, 3D, 5D, 6D, 8D, 10D or Custom
Stainless Steel 321 / 321H Pipe Fittings

Equivalent Grades

SS 321 1.4541 S32100 SUS 321 X6CrNiTi18-10
SS 321H 1.4878 S32109 SUS 321H X12CrNiTi18-9

Manufacturing Standards

ASME B16.9 ASTM A403 WP321 Fittings Factory-Made Wrought Buttwelding FittingsLong Radius Elbows, Long Radius Reducing Elbows, Long Radius Returns, Short Radius Elbows, Short Radius 180-deg Rerurns, 3D elbows, Straight Tees, Straight Crosses, Reducing Outlet Tees, Reducing Outlet
Crosses, Lap Joint Stub Ends, Caps, Reducers
ASME B16.28 Short Radius Elbows, Short Radius 180-deg Returns
MSS SP43Wrought and Fabricated Butt-Welding Fittings for Low Pressure, Corrosion Resistant ApplicationsLong Radius Elbows, Straight and Reducing-on-the-Outlet Tees, Lap Joint Stub ends, caps, long radius 180 Degree returns, concentric reducers, eccentric reducers
Mss SP75 Long Radius Elbows, 3R elbows, straight tees, reducing outlet tees, caps, reducers

Different Types

Buttweld Elbow

SS 321,321H Pipe Elbow

Butt weld Tee

SS 321,321H Pipe Tee

Butt weld Cross

SS 321,321H Pipe Cross


SS 321,321H Reducers

Buttweld Pipe Cap

SS 321,321H Pipe Cap

Buttweld Stubends

SS 321,321H Stub End

Contact us to get a quick quote for your requirement.

We offer These Stainless Steel 321/321H Buttweld Pipe Fittings as per DIN, ISO, JIS or ANSI Standard.

Available Stock

  • Stainless Steel 321 Pipe Reducing Tee
  • Stainless Steel 321 Lap Joint Stub Ends
  • SS 321H Reducers
  • Stainless Steel 321H 45° Short Radius Elbow
  • 321 Stainless Steel 1D Elbow
  • 321 SS Pipe Fittings
  • SS 321H 3D Elbow
  • ANSI B16.9 Stainless Steel 321 Pipe Caps
  • UNS S32100 Buttweld Fittings
  • UNS S32109 Stainless Steel 2D Elbow
  • SS 321H Butt weld Elbow
  • ASME B16.28 SS 321 Two Joint Pipe Fittings
  • Grade 321 Stainless Steel Pipe Fittings
  • 321 SS Two Halve Butt weld Fittings
  • Type 321H SS Industrial Buttweld Fittings
  • INOX 321H Buttweld Pipe Fittings
  • Stainless Steel 321 180° Buttweld Elbow
  • Stainless Steel 321H Concentric Reducer
  • SS 321 90° LR Elbow
  • SS 321 Eccentric Reducer
  • Stainless Steel 321 Buttweld Elbow
  • SS 321H Pipe Fittings
  • ANSI B16.28 321H SS Seamless Pipe Fittings
  • Austenitic Stainless Steel 321H 45 Degree Pipe Elbow
  • SS 321 Butt Weld Elbows 90°-SR- ASME B16.9
  • Stainless Steel 321 Reducing Elbow
  • Stainless Steel 321H Buttweld Pipe Nipple
  • 321 SS Stub End
  • SS 321 Buttweld Pipe Fittings
  • SS 1.4878 Two Joint Pipe Fittings
  • Stainless Steel 321H Pipe Bends
  • ASTM A403 WP 321H Stainless Steel Lateral Tee

Dimensional Tolerances

1/2 TO 2-1/2+1/16±1/32Not less than 87-1/2% of Normal Thickness±1/16±1/16±1/8±1/4±1/4±1/3212 to 41/321/16


5 to 81/161/8
3 TO 3-1/2±1/16±1/16±1/16±1/16±1/8±1/4±1/4±1/3210 to 123/323/16
4±1/16±1/16±1/16±1/16±1/8±1/4±1/4±1/3214 to 163/321/4
5 TO 8+1/32±1/16±1/16±1/16±1/4±1/4±1/4±1/3218 to 241/83/8


10 TO 18+1/16±1/8±3/32±3/32±1/4±3/8±1/4±1/16 All dimensions are in inches 


20 TO 24+1/4±3/32±3/32±3/32±1/4±3/8±1/4±1/16


Chemical Structure

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

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 %

We Serve Application Industry

Application Industry

Butt weld Pipe Fittings applications are as diverse as the industries they serve driven primarily by the aerospace, railway, construction and automotive industries with petrochemical, nuclear, medical, Oil & Gas, Chemical, Pharmaceutical, Food & Beverage, Nuclear, Thermal Power plants, Paper and Pulp, marine and mining, etc.

Oil & Gas Industry

Petrochemical Industry

Power Generation Industry

Chemical Industry

Global Steelindia

Global Steel is a significant manufacturer and exporter of all ferrous and non-ferrous metals. As a pioneer and leader in the industry, Global Steel is at the forefront of technology and research.

Quick Contact

Shop No.6, Sonarika Bldg, 25/C, Chandawadi, Cawasji Patel Tank, Mumbai, Maharashtra 400004