Cov hlau tuaj yeem muab faib ua cov pa roj carbon tsawg, nruab nrab carbon steel thiab siab carbon steel. Tsawg carbon steel - cov ntsiab lus carbon feem ntau tsawg dua 0.25%; nruab nrab carbon steel - carbon cov ntsiab lus feem ntau ntawm 0.25 thiab 0.60%; high carbon steel - cov ntsiab lus carbon feem ntau ntau dua 0.60%.
Tus txheej txheem kev tswj hwm: kuv lub teb chaws Taiwan CNS tus qauv steel tooj S20C, German DIN tus qauv khoom tus lej 1.0402, German DIN tus qauv steel tooj CK22 / C22. British BS tus qauv steel tooj IC22, Fabkis AFNOR tus qauv steel tooj CC20, Fabkis NF tus qauv steel tooj C22, Italian UNI tus qauv steel tooj C20/C21, Belgium NBN txheem steel nab npawb C25-1, Sweden SS txheem steel tooj 1450, Spain UNE txheem steel No. F.112, American AISI/SAE standard steel No. 1020, Japanese JIS standard steel No. S20C/S22C.
Chemical muaj pes tsawg leeg: Carbon C: 0.32～0.40 Silicon Si: 0.17～0.37 Manganese Mn: 0.50～0.80 Sulfur S: ≤0.035 Phosphorus P: ≤0.035 Chromium Cr: ≤0.25 Nickel5 ≤ 200. : Tensile zog σb (MPa): ≥530 (54) Yield zog σs (MPa): ≥315 (32) Elongation δ5 (%): ≥20 Cheeb Tsam shrinkage ψ (%): ≥45 Impact zog Akv (J): ≥ 55 cuam tshuam toughness tus nqi αkv (J / cm²): ≥69 (7) Hardness: unheated ≤197HB Qauv loj: qauv loj yog 25 hli Kev ua tau zoo National standard: GB699-1999
