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321/321H Stainless Steel Pipes. Stockists & Suppliers of ASTM A312 TP321 Stainless Steel Pipes

321/321H Stainless Steel Pipes


321/321H Stainless Steel Pipe Manufacturers & Suppliers –  1.4541 , UNS S32100, UNS S32109, 1.4878

Metline is one of the best manufacturers and suppliers of ss 321 pipes in India, with exports to over 60 countries across the globe. We produce and sell industrial stainless steel 321 pipes, ss 321 seamless pipes, and ss 321 seamless tubing in size range of 6mm to 1000mm OD.

We have over 10 years of export experience in stainless steel 321 pipes and tubes. After many years’ of development, Metline has grown into a renowned manufacturer of stainless steel 321/321H pipes. The main products include welded 321 stainless steel pipes, seamless 321 stainless steel pipes, and sanitary stainless steel pipes etc. SS 321/321 stainless steel pipes are mainly used in the industries of petrochemical, natural gas, papermaking, brewery and water processing etc.

GradeStainless Steel 321 (1.4541, S32100), Stainless Steel 321H (S32109, 1.4878)
ProductStainless Steel 321/321H Pipes
TypeSeamless & Welded Pipes, Large Diameter Fabricated, ERW, 100% X Ray Welded
Seamless Pipe Sizes6mm OD to 762 OD  x 0.5mm thk to 70mm thk
Welded Pipes Sizes15mm OD to 2200 OD × 0.5mm thk to 80mm thk
SpecificationASTM A312, ASTM A213, ASTM A358, ASTM A813, ASTM A814
DimensionsASME/ANSI B36.10/19
Test CertificatesEN 10204 3.1, 3.2
Approvals & InspectionTUV, GL, ABS, BVQI, SGS, Lloyds
HS Code7306, 7304
FinishAnnealed & Pickled, Polished

Contact Us If You are Looking to Buy 321/321H Stainless Steel Pipes!

Call Us Now +919833604219 or Email Us “sales@metline.in”

An international piping materials supplier, Metline welcomes you to send us your enquiries for stainless steel 321 pipes, fittings & flanges and allow us to partner in your growth. We can assure you the best quality products, with the most competitive prices in the industry.

All pipes supplied by Metline are tested according to requirements of the appropriate standards. In all cases the tube leaking test is performed, and supplied with Test Certificates at per EN 10204 3.1 or NABL approved lab test reports. We focus on each and every customer with a personal touch, making us one of the top supplier of stainless steel pipes and a reliable business partner for all industrial buyers.


AISI 321 Pipes Manufacturers (1.4541, S32100)  | AISI 321H Pipe Manufacturers (S32109, 1.4878) – ASTM A312 TP321

Metline is one of the largest manufacturing and stockholding company in India, supplying stainless steel 321/321H pipes as well as stainless steel 321 fittings and stainless steel 321 flanges.

Given our extensive expertise and knowledge in stainless steel industry we can offer stainless steel 321 pipes, at the most competitive prices in the Industry. We are wholesaler for stainless, acid and heat-resistant steel pipes, fittings and flanges with extensive stocks.

Stainless Steel 321 is a basic austenitic 18/8 steel (Grade 304) stabilised by Titanium (321) addition. SS 321 is used because they are not sensitive to intergranular corrosion after heating within the carbide precipitation range of 425-850°C. Stainless Steel 321 is the grade of choice for applications in the temperature range of up to about 900°C, combining high strength, resistance to scaling and phase stability with resistance to subsequent aqueous corrosion. SS 321H is a modification of SS 321 with a higher carbon content, to provide improved high temperature strength.

321/321H Stainless Steel Pipes, Tube Chemical Composition

NI9.0 – 12.09.0 – 12.0
C0.08 max0.04 – 0.10
MN2.0 max2.0 max
P0.045 max0.045 max
S0.030 max0.030 max
SI1.0 max1.0 max
CR17.0 – 19.017.0 – 19.0
TI5(C+N) – 0.70 max4(C+N) – 0.70
N0.10 max0.10 max

321/321H Stainless Steel Pipes, Tube Mechanical Properties

Density8.0 g/cm3
Melting Point1454 °C (2650 °F)
Tensile StrengthPsi – 75000 , MPa – 515
Yield Strength (0.2%Offset)Psi – 30000 , MPa – 205
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