What is the difference between 201 and 202?202 stainless steel is one of 200 series stainless steel, the national standard model is 1Cr18Mn8Ni5N.200 series stainless steels are low nickel and high manganese stainless steels with nickel content and manganese content of about 8%.202 is the American sign number, instead of 1Cr18Ni9.Austenitic stainless steel is characterized by high phase transition temperature, so it can be used as heat resistant steel.To make austenitic stainless steel phase change, must be heated to more than 1000℃, and at 350℃, will not occur in the change of metallographic structure, that is, the performance of steel does not change fundamentally.Will only be due to heat and lead to expansion, but little change, under normal circumstances can be ignored, 202 stainless steel has good high temperature resistance.It is its this performance, 202 stainless steel widely used in building decoration, municipal engineering, highway guardrail, hotel facilities, shopping malls, glass handrails, public facilities and other places.By high-precision automatic pipe making equipment, through self-etching welding, roll forming, without any metal filler, filled with gas protection (inside and outside of the pipe) welding, welding method is TIG process, and online solid solution eddy current detection.

On the label, 202 has one more manganese than 201, and three more nickel.In the practical application, 202 is slightly better than 201 in terms of utility, but most market users accept the 201 material decorative tube with lower price and similar actual utility to 202.202 chromium and manganese than 201 a little more, mechanical and corrosion resistance is also slightly better, but strictly speaking the performance of these two kinds of stainless steel difference in essence is not big, especially in the corrosion resistance difference is not big.

201 and 202 stainless steel surface only slightly different, but the actual look or there are more different, through the introduction of this paper, also hope to help industry users in the selection of procurement, can find more suitable for their own products of stainless steel material, improve the application efficiency, save the actual cost.