1075 and CS75 are wrought high-carbon (carbon = 0.70-0.80%) non-alloy steels that have a lower manganese content (manganese = 0.40-0.70%) than 1074 (manganese = 0.50-0.80%). They are used in the cold worked, quenched and tempered, or austempered condition. These steels are widely used for highly stressed parts that require higher strength levels than can be achieved by the lower carbon grades. They are also used for applications where the higher carbon is needed to improve wear characteristics. Source: Ref 1-3
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