SS490 Me Hlau H nqaj
SS490 Kev Tsim Kho Hlau yog hais txog tus qauv hlau steel nrog ib qho tsawg kawg nkaus ntawm 490 MPa, uas muaj zog dua li lwm cov qib xws li SS400. SS490 H-nqaj yog tsim los ntawm cov roj carbon ua zoo los ntawm cov txheej txheem kub kub, thaum txhim kho cov khoom siv tshuab H "muaj peev xwm zoo heev.