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202 Seamless l Stainless Steel Pipe

The seamless steel pipe is made of perforated whole round steel, and the steel pipe without weld seam on the surface is called seamless steel pipe. According to the production method, seamless steel pipes can be divided into hot-rolled seamless steel pipes, cold-rolled seamless steel pipes, cold-drawn seamless steel pipes, extruded seamless steel pipes, and pipe jacking. According to the cross-sectional shape, the seamless steel pipe is divided into two types: round and special-shaped. The maximum diameter is 900mm and the minimum diameter is 4mm. According to different uses, there are thick-walled seamless steel pipes and thin-walled seamless steel pipes. Seamless steel pipes are mainly used as petroleum geological drilling pipes, cracking pipes for petrochemical industries, boiler pipes, bearing pipes and high-precision structural steel pipes for automobiles, tractors and aviation.
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Product Description

202 stainless steel is one of the 200 series of stainless steel, gb model is 1Cr18Mn8Ni5N. 202 stainless steel is widely used in building decoration, municipal engineering, highway guardrail, hotel facilities, shopping malls, glass handrails, public facilities and other places.


It is made by high-precision automatic pipe making equipment through self-dissolution welding, roll-forming, and welding by filling gas protection (inside and outside of the pipe) without any metal filler. The welding method is TIG technology, and the online solution eddy current flaw detection is performed.

Seamless Stainless Steel.jpg-1000


Chemical composition/%
brand C Si Mn P S Ni Cr Mo Cu N Other
202 ≤0.15 ≤1.0 ≤7.5~10.0 ≤0.060 ≤0.03 4.00~6.00 17.0~19.0 -- -- ≤0.25



brand Heat treatment The yield strength Mpa Tensile strength Mpa Modulus of elasticity  psi HBS HRB HV
202 1010~1120Fast cooling ≥275 ≥520 ≥400000 ≤207 ≤95 ≤218


Now the comparison table of some Austenitic stainless steels between Chinese and American brands is listed below:


Before is The Chinese GB brand, in parentheses is the American ASTM brand, (/) means there is no corresponding brand.


1Cr17Mn6Ni5N(201), 1Cr18Mn8Ni5N(202), 1Cr17Ni7(301),


1 cr18ni9 (302), Y1Cr18Ni9 Y1Cr18Ni9Se (303) 303 (se),


Cr19ni9, 0Cr18Ni9 (304), 0Cr19Ni10, 0Cr18Ni10(304L), 0Cr19Ni9N(304N1),


0Cr19Ni10NbN(304N2), 0Cr18Ni10N(304LN), 1Cr18Ni12, 1Cr18Ni12Ti(305),


0Cr23Ni13(309S), 0Cr25Ni20, 0Cr25Ni20Si2(310S), 0Cr17Ni12Mo2,


0Cr18Ni12Mo2Ti(/)00Cr17Ni14Mo2(316L), 0Cr17Ni12Mo2N(316N), 00Cr17Ni13Mo2N(316LN), 0Cr18Ni12Mo2Cu2(316J1), 00 cr18ni14mo2cu2 j1l (316), 0 cr19ni13mo3 (317).


1Cr18Ni12Mo3Ti(/), 0Cr18Ni12Mo3Ti(/), 00Cr19Ni13Mo3, 00Cr17Ni14Mo3 (317L),


0Cr18Ni16Mo5(317J1), 1Cr18Ni9Ti(321), 0Cr18Ni11Ti, 0Cr18Ni9Ti(321L),


0Cr18Ni11Nb(347), 0Cr18Ni9TiCu3(XM7), 0Cr18Ni13Si4(XM15J1)


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