不锈钢（Stainless Steel）指耐空气、蒸汽、水等弱腐蚀介质和酸、碱、盐等化学浸蚀性介质腐蚀的钢，又称不锈耐酸钢。实际应用中，常将耐弱腐蚀介质腐蚀的钢称为不锈钢，而将耐化学介质腐蚀的钢称为耐酸钢。由于两者在化学成分上的差异，前者不一定耐化学介质腐蚀，而后者则一般均具有不锈性。不锈钢的耐蚀性取决于钢中所含的合金元素
常顺供应不锈钢板，钢棒，钢带，圆钢，钢丝：美国：201,202,301,302,303,303Se,304,304L,
XM21,305,309S,310S,316,316L,316N,317,317L,321,347,XM7,XM15,405,430,430F,434,XM27,
403,410,410S,420,420F,431,440A,440B,440C,630,631,632,
日本：:SUS201,SUS202,SUS301,SUS302,SUS303,SUS303Se,SUS304,SUS304L,
SUS304N1,SUS304N2,SUSLN,SUS305,SUS309S,SUS310S,SUS316,SUS316L,SUS316LN,
SUS316J1,SUS317,SUS317J1,SUS321,SUS631,SUS630,SUS440B,SUS440C,SUS440F,
SUS440C,SUS440A,SUSU440B,SUS431,SUS420J2,SUS420F,SUS420J2,SUS420J1,SUS410J1,
SUS410S,SUS403,SUSXM27,SUS44JI,SUS434,SUS430F,SUS410L,SUS405,SUS329JI,SUSXM15J1,SUSXM7,SUS347