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20Cr Alloy Seamless Steel Pipes: 20Cr alloy steel pipe is a kind of high-precision steel pipe material after cold drawing or hot rolling treatment. Because the inner and outer walls of precision steel pipes have no oxide layer, no ...

40Cr Alloy Seamless Steel Pipe: before welding, and is generally used in the state of quenching and tempering. 1. Incoming Raw Material Inspection2. Raw Material Segregation to avoid steel grade mix-up3. Heating and Hammering End ...

API 5L Grade B Carbon Steel Pipe Line Pipe: Types. Usually PSL1 is used, which is equivalent to ASTM A106 B and A53 B. PSL2 is a higher specification grade pipe with stricter requirements for chemical and mechanical strength. PSL2 requires ...

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20Cr Alloy Seamless Steel Pipes