Hom: SAE1144

Txheem: Astm A108-1999

Cov txheej txheem khoom: Cais kos, sib tsoo

Cov Khoom Lag Luam: Round pas nrig, hexagonal pas nrig, square pas, square pas, cov khoom siv puab

Dawb Txiav Hlau Rau Kev Siv

Siv raws li tig hlau, siv dav hauv cov txheej txheem.

Tshuaj lom neeg cov tshuaj:

Cov pa roj carbon C: 0.40 ~ 0.48

≤0.040

Sulphur S: 0.24 ~ 0.33

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