| 摘要 |
Cold-rolled, non-microalloyed carbon manganese steel (0.04% to 0.15% C, 0.25% to 0.70% Mn) is preheated at 700.degree. to 1000.degree.F, heated to 1625.degree. to 1725.degree.F, and quenched to 650.degree. to 750.degree.F in a continuous process to develop minimum yield strength of 275 MPa, minimum tensile strength of 345 MPa, and 22% minimum elongation.
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