... :Seamless,Website:http://www.xf-stainless-steel.com,welded,annealed,hardened,heat treated and cold treatedType:Round, ... , ASTM A249,ASTM A312,etc.Seamless pipe:OD:3-577mm,Wall thickness:0.4-14mmWelded pipe:OD:6-219mm,Wall thickness:0.3 ... -4mmLength:1-6m Surface treatment:No.1,2B,BA,No.4,hairline ...