Carbon Steels are mostly used as engineering steels and hardness can be controlled by adjusting carbon content and heat treatment.
Qualities:
C8 (SAE 1008), C10 (SAE 1010), C22 (SAE 1020), 1025,SAE, C30, C30E, CK30 (SAE 1030), C35, C35E, CK35 (SAE 1035), C40, CK40 (SAE 1040), C45, C45E, CK45, C45R (SAE 1045), C50, C50E, CK50, C50R, Cf53 (SAE 1050), C60, C60E, CK60 (SAE 1060), C70, C70E, CK70 (SAE 1070)
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