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SS 321 Tubing Manufacturers. SS 321 Tubing Suppliers - Wholesale Prices for SS 321 Tubing

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Stainless Steel 321 Tubing


Manufacturers of Stainless Steel 321 Tubing, SS 321H Tubing Suppliers in India

Metline Industries is a market leader and manufacturer of stainless steel 321/321H seamless and welded tubing in India. Metline is a specialist supplier of stainless steel 321 tubing, with high quality and low prices. We are located in Mumbai, and are engaged in the manufacture and supply of SS 321 tubing to all major industrial centers in India and overseas. Our high quality 321 stainless steel tubing’s are widely accepted by end users across the globe. We can offer 321 stainless steel tubings in size range of 1/8″ to 2″, with light and heavy wall thickness and in seamless or welded forms.

Get in Touch With Us, If You are Looking to Buy Stainless Steel 321 Tubing!

Call Us Now +919833604219 or Email Us “”

“Best Quality & Prices for SS 304 Tubing is What you Can Expect from Metline Industries”

“We Provide 100% Replacement Guarantee On Our All Our Stainless Steel Products” We are professional manufacturer and supplier of stainless steel products, including stainless steel decorative pipes, industrial stainless welded pipes, stainless steel seamless pipes as well as special-shaped pipes in stainless steel. Our customers can also buy from us, all stainless steel pipes fittings, stainless steel flanges and flexible hoses required along with pipes from us at best prices. “Our Quality Would Never be Compromised

For all your  questions and enquiries please contact our sales department by dialing the following number:
+919892451458/9833604219 or send an email to


AISI 321 (1.4541, S32100) Stainless Steel Tubing | AISI 321H (1.4940, S32109) Stainless Steel Tubing

Grade 321 is a common austenitic 18/8 stainless steel alloy, with the addition of titanium, making it a good choice in high temperature environments of up to 900° C. 321 stainless steel has good welding and forming capabilities and is widely used in operating temperature environments in excess of 500° C. Stainless steel 321H, commonly referred as UNS S32109, is the higher carbon version of the 321 grade, to provide higher temperature strength.

Stainless Steel 321/321H pipes and tubes are available in both seamless and welded form in OD and NB sizes. In addition to standard sizes, which are available in stock, our specialty is to manufacture and supply custom size 321/321H cold drawn seamless tubes from our factory.

321/321H Stainless Steel Pipes, Tube Chemical Composition

Grade C Mn Si P S Cr Ni Ti N
321 0.08 max. 2.00 max. 0.75 max. 0.045 max. 0.03 max. 17.0 – 19.0 9.0-12.0 5 x (C+N) min. 0.1
321H 0.04 – 0.10 2.00 max. 0.75 max. 0.045 max. 0.03 max. 17.0 – 19.0 9.0-12.0 5 x (C+N) min. 0.1

321/321H Stainless Steel Pipes, Tube Mechanical Properties

Density 7.92
Melting Range,℃ 1398-1446
Elongation % 40
Tensile Strength (Mpa) 515
Yield Strength (Mpa) 205
Hardness (Brinell) 217

321/321H Stainless Steel Pipes, Tube Stock and Supply Range

Sr. No. Product Description Outside Diamter, OD (in mm) Wall Thickness, WT (in mm)
1 321/321H Stainless Steel Round Pipe/Tube 6mm – 630mm 0.5mm-30mm
2 321/321H Stainless Steel Square Pipe/Tube 12.7mm* 12.7mm to 300mm* 300mm 0.5mm-30mm
3 321/321H Stainless Steel Rectangular Pipe/Tube 10*20mm to 100*200mm 0.5mm-30mm
4 321/321H Stainless Steel Colour Coated Pipe/Tube 6mm to 630mm 0.5mm-30mm
5 321/321H Stainless Steel Ornamental Tubes 12.7mm to 76.2mm 0.5mm-2.0mm
6 321/321H Stainless Steel Electropolished Pipes/Tubes 12.7mm to 250mm 0.5mm-30mm
7 321/321H Stainless Steel Slot Round Pipe/Tube 12.7mm to 76.2mm 0.5mm-2.0mm
8 321/321H Stainless Steel Triangle Tube 16mm to 85mm 0.5mm-3.0mm
9 321/321H Stainless Steel Hexagonal Tube 13mm to 85mm 0.5mm-2.0mm
10 321/321H Stainless Steel Handrail Tube 0.5mm-2.0mm
11 321/321H Stainless Steel U Shaped Tube 20mm to 200mm 0.5mm-2.0mm
12 321/321H Thin-Wall Stainless Steel Tube 22mm*0.7mm to 108mm*2.0mm 0.5mm-2.0mm
13 321/321H Inner/Outside Polished Stainless Steel Tube, Pipes 12.5mm to 203.2mm 1.0mm – 5mm
14 321/321H Stainless Steel Capillary Tube 0.28mm to 10mm 0.08mm – 1.2mm
15 321/321H Stainless Steel Seamless Tube 6mm to 430mm 0.8mm – 30mm

Wide Production Range of Stainless Steel 321/321H Seamless Tubing

  1. Product Name: Seamless Austenitic Stainless Steel 321/321H Boiler Tubing, 321/321H Super Heater Tubing, 321/321H Heat-Exchanger Tubing
    Manufacturing Process: Cold Rolled 321/321H Tubing, Hot Rolled 304/304L Tubing
    Surface Condition: Annealed and Pickled, Polished 180-400 Grit
  2. Delivery conditions: Solution Annealed, Pickled with Plain Ends/Bevel Edges Ends, Polished, Electropolished
  3. Manufacturing Standards: ASTMA213, ASTMA312, ASTM A269, ASTMA511, ASTM A789, ASTM A790, DIN17456, DIN17458, EN10216-5, EN17440, JISG3459, JIS3463
  4. Other Steel Grades: 304 ,304L, 304H, 304N, 316, 316L, 316Ti, 317L, 310S, 321, 321H, 347H, S31803, S32750, 347, 330, 825, 904L, 12X18H9, 08X18H10, 03X18H11, 08X18H10T, 20X25H20C2, 08X17H13M2T, 08X18H12E, 1.4301, 1.4306, 1.4401, 1.4404, 1.4435, 1.4541, 1.4571, 1.4563, 1.4462, 1.4845, SUS304, SUS304L, SUS316, SUS316L, SUS321, SUS310S etc.
  5. Size: Out diameter:   ANSI 1/8-24(6mm-630mm), Wall thickness:  ANSI 5S-160S (0.9mm-30mm), Length: Max.25 meters
  6. MOQ = 100 KGS for In Stock Sizes, 1000 KGS for Manufacturing QTY.
  7. Delivery: Immediate for In Stock Regular Sizes
  8. Testing: PMI for Chemical Composition, Yield Strength, Tensile Strength, Elongation, Hardness Test, Flattening Test, Flaring Test, Eddy Current Test, Ultrasonic Test, Hydrostatic Test, Corrosion Test, etc.
  9. Packing: In Bundles or SeaWorthy Wooden Cases

Applications for Stainless Steel 321/321H Tubing

Petroleum, Chemical Industry, Chemical Fiber, Smelting, Medical Machinery, Paper Making, Refrigeration, Mechanical Equipment, Food Processing, Water Treatment Plants, Architecture, Aerospace, Shipbuilding, Boiler * Heat Exchangers


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