1.grade : astm a335 p12 2.standard : ASTM JIS DIN GB EN 3.have stock 4.high quality 5.best price Main standardGB,ASTM, AISI, SAE, API ... ,4150,P91,T91 P92,T92, P5, P9,T5,T9,P11,P12,P22stainless304,316,304L,316L,316LN,316H,316Ti.316Lmod(724L),321 ...