Enwere ike kewa nke ọma n'ime obere carbon ígwè, ala carbon steel na akwa carbon dị elu. Carbon ígwè dị ala - ọdịnaya carbon na-erughị 0.25%; igwe carbon carbon - ọdịnaya carbon dị n'etiti 0,25 na 0.60%; Mpempe carbon dị elu - ọdịnaya carbon dị ukwuu karịa 0.60%.
Standard Standard: Obodo m Taiwan Cns Standard Stael S20c, Germany Star Standard nọmba 1.0402, German Dan Standard Stael CK22 / C22. Nọmba nke British BS Standard Standard Mong Station CC20, Asambodo NF Standard C25, Spain Anisa Standard C25, Spain Anisi / Sae Standard Standard No. 1020, Japanese JIS Japan Nzọụkwụ Nke S20c / S22c.
Ngwakọta kemịkal: carbon c: 0.30 silicon si: 0.17 ~ 0.035.25 nicken cu: ≤0.25.25.25.25 σb (MPA): ≥530 (54) mkpụrụ ikike σ σ5 (3): 25mm teknụzụ National Protional Romance: GB699-1999