Siv rau yob txoj kev ntawm steel hlab. Kev poob lawm ntawm chais yuav siv tau los khoov sawb steel rau hauv steel hlab qhov yuav tsum tau taub.
Khoom siv: GCr15 los yog Cr12 los yog Cr12MoV
Hardness ntawm cov menyuam: HRC58-62
Deepness ntawm quench hardening: ≥ 10 hli
Roughness ntawm deg: Ra≤0.8um
