Stainless Steel Welded Pipe duplex ASTM A790/ASTM A789 GB/T21832-2008

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1、Structure of Stainless Steel Welded Pipe duplex ASTM A790/ASTM A789 GB/T21832-2008 Description:

    Stainless steel welded pipe is actually a cover term, covering a wide range of alloy and making them suitable for different attributes that are used in a very wide and large numbers of different industries. Stainless steel pipe is resistant to erosion, highly flexible, powerful, easy to use, and can be done in distinct approaches, which means that more and more stainless steel was used as a construction material for large-scale, high impact buildings. It can be molded, rolling, and it can create amazing shapes to make it perfect, It is used as experimental buildings, The use of steel pipe welding of large stainless steel covers other examples.

2、Main Features of the Stainless Steel Welded Pipe duplex ASTM A790/ASTM A789 GB/T21832-2008:

• High manufacturing accuracy

• High strength

• Small inertia resistance

• Strong heat dissipation ability

• Good visual effect

•Reasonable price 

3、Stainless Steel Welded Pipe duplex ASTM A790/ASTM A789 GB/T21832-2008 Images:

4、Stainless Steel Welded Pipe duplex ASTM A790/ASTM A789 GB/T21832-2008 Specification:

composition of duplex stainless pipe(%) 

Steel grade
S32750((SAF2507) 00Cr22Ni7Mo4N0.031.200.800.0200.03524.0/ 26.06.0/ 8.03.0/ 5.00.500.24/ 0.32


00Cr22Ni5Mo3N 23.04.50/ 6.502.50/ 3.50
0.08/ 0.20


0.031.2/ 2.001. 4/ 2.000.0300.03018.0/ 19.04.25/ 5.252.50/ 2.00
0.05/ 0.10

Mechanical Properties of duplex pipe:

 Steel Grade
Heat Treatment Temperature ℃Ab(MPa)≥As(MPa)≥∮≥brinellrockwell


1025-1125 water






Outer Diameter



0.3mm - 3.0mm


6m or as customers' request


180G, 320G, 400G Satin / Hairline

400G, 500G, 600G or 800G Mirror finish


Decoration construction, upholstery, industry instrument


Squash test, extended test, water pressure test, crystal rot test, heat treatment, NDT

 5、FAQ of Stainless Steel Welded Pipe duplex ASTM A790/ASTM A789 GB/T21832-2008:


How is the quality of your products?
    Our products are manufactured strictly according to national and internaional standard, and we take a test on every pipe before delivered out. If you want see our quality certifications and all kinds of testing report, please just ask us for it.
Guaranteed: If products’ quality don’t accord to discription as we give or the promise before you place order, we promise 100% refund.

How about price?
    Yes, we are factory and be able to give you lowest price below market one, and we have a policy that “ for saving time and absolutely honest business attitude, we quote as lowest as possible for any customer, and discount can be given according to quantity”,if you like bargain and factory price is not low enough as you think, just don’t waste your time.Please trust the quotation we would give you, it is professional one.

Why should you chose us?
    Chose happens because of quality, then price, We can give you both.Additionally, we can also offer professional products inquiry, products knowledge train(for agents), smooth goods delivery, exellent customer solution proposals.Our service formula: good quality+good price+good service=customer’s trust
SGS test is available, customer inspection before shipping is welcome, third party inspection is no problem.

Any question, pls feel free to contact us !

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