National Standard: GB52; GB/T6170; GB/T6171; GB/T6177; GB/T41
Germany Standard: DIN934; DIN555; DIN980; DIN985; DIN1587
International Standard: ISO4032; ISO4033
Japan Standard: JIS B 1181
Grade 4 Grade 6: SWRM10; S35C; A3
Grade8: S35C; 45#
Stainless Steel:304; 304M; 304B;304HC; 304L; 316; 316L, etc.
Black Oxide、 Zinc、 Yellow Zinc、 Hot Dipped Galvanizing、 Dacromet