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

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25 m.t.
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5000 m.t./month

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Product Description:

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
C≤Mn≤Si≤S≤P≤CrNiMoCu≤N
S32750((SAF2507) 00Cr22Ni7Mo4N0.031.200.800.0200.03524.0/ 26.06.0/ 8.03.0/ 5.00.500.24/ 0.32
S31803(SAF2205)

 

00Cr22Ni5Mo3N
0.032.001.00.020.03021.0/ 23.04.50/ 6.502.50/ 3.50
0.08/ 0.20
S31500(3RE60)

 

00Cr18Ni5Mo3Si2
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
S32750(SAF2507)

 

00Cr22Ni5Mo3N
1025-1125 water
8005501531032
S31803(SAF2205)

 

00Cr22Ni5Mo3N
1020-11006204502529030.5
S31500(3RE60)

 

00Cr18Ni5Mo3Si2
980-10406304403029030.5


Details:


Outer Diameter

6mm--159mm

Thickness

0.3mm - 3.0mm

Length

6m or as customers' request

Surface

180G, 320G, 400G Satin / Hairline

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

Application

Decoration construction, upholstery, industry instrument

Test

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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Q:Why is stainless steel magnetic?
Many customers often think that the magnet adsorption of stainless steel, to verify its merits and authenticity, and do not smoke without magnetism, that is good, genuine; smokers are magnetic, is considered a fake fake. In fact, this is a very one-sided, not practical, and the wrong way to identify, I hope the following content for your help!
Q:Classification, advantages and disadvantages of stainless steel welding
The utility model has the advantages of universal use and easy operation, and is mainly regulated by people, and the welding seam material is an electric welding strip. Manual welding can weld almost all of the material, even outdoors, so it has good adaptability and is usually powered by direct current.Welding, either titanium type electrode, can also be sealed. The titanium electrode is easy to weld, the welding seam is beautiful, and the welding slag is easy to remove. But the drawback is that if you do not use it for a long time, you must bake it again to prevent moisture accumulation.
Q:What are the categories of stainless steel pipes with acid and alkali resistance?
Stainless steel is usually classified according to the organization of the matrix, as follows:The ferritic stainless steel (200 and 400) the chromium content in 15%~30%, with a body centered cubic crystal structure. This kind of steel does not contain nickel, sometimes also contain a small amount of Mo, Ti, Nb and other elements, this kind of steel has high heat conductivity, low expansion coefficient, good oxidation resistance and anti stress excellent characteristics of stress corrosion, used formanufacturingthecorrosionresistanceofthe atmosphere, water vapor, waterandoxidizing parts. Ferritic stainless steel prices are relatively low and stable, and has many unique characteristics and advantages, it has been proved that in many of the original that can only use austenitic stainless steel (300) application of ferritic stainless steel is a very excellent substitute materials, ferritic stainless steel containing nickel, the main elements of Cr (>10%) and iron, chromium stainless steel special corrosion resistant elements, its price is relatively stable.. Chromium 12% ~ 30%. Its corrosion resistance and toughness increase with the increase of chromium content, and the weldability is excellent.
Q:What's the easiest way to distinguish between stainless steel 202 and 304?
304# and 202# are American Standard grade 304 is 0Cr18Ni9202shi 1Cr18Nn8Ni5N
Q:Mechanical properties of stainless steel tubes
High temperature fatigue is the process of damage to fracture due to repeated stress changes in the material at high temperature. The results show that, at a certain high temperature, the fatigue strength of the 8 power high temperature of 10 is 1/2 of the high temperature tensile strength at this temperature.
Q:Stainless steel pipe specification 25*2 what does it mean?
Outside diameter 25MM, wall thickness 2MM, this tube is too thick, our company has thin wall stainless steel tube
Q:Why does the 304 stainless steel pipe leak?
Austenitic stainless steels are extremely sensitive to chloride ion and can occur in a very short time if the temperature and concentration are appropriate. Therefore, the relevant standards and specifications in the clear requirements for austenitic stainless steel pressure vessels for hydraulic pressure test, there are strict requirements on the chloride ion concentration of the water, and after the test to put water clean, dry. In order to avoid residual moisture in the chloride ion corrosion of stainless steel.
Q:What is the welding of stainless steel?
Sheet argon arc welding greater than 10mm by hand welding or gas shielded welding
Q:Can magnets attract stainless steel tubes?
Can not. The structure of iron ion in stainless steel tube has changed
Q:Stainless steel seamless steel tube, ordinary seamless steel pipe, which is good?
The general stainless steel tube is wear-resistant, high temperature resistance, corrosion resistance. Plain carbon steel seamless tubes resist pressure better than stainless steel.

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