冷轧防弹钢板的性能通过淬火强化，低温回火后的力学性能为：σs≥180kg/mm2, σb≥200kg/mm2,δs≥8%,同时具有一定的焊接性能和深冲性能（退火状态）。它与国外低合金超高强度钢比较，如美国的D6AC、4340、300M、前苏联的30CrMnSiNi2A等，在强度指标方面是相当的。其冷轧薄板的实际使用强度均超过180Kg/mm2，延伸率超过8%。在抗弹性能方面，超过美国钢盔用高碳高锰高合金奥氏体钢，日本，前苏联，德国防弹用中低合金超高强度钢。可见该钢在综合性能上是非常优秀的。但它并不是xx无缺的，它的防脱碳能力差，对后期热处理设备要求较高。

The function of FD---l steel cold-rolled steel plate is strengthened through quenching, the mechanics function after the tempering of low temperature is: σs≥180 kg／mm2, σb≥200 kg／mm2, δ5≥8%. At the same time it has certain welding function and deep impact function (annealing state). It is compared with foreign low alloy extra high strength steel, for example, American D6AC, 4340, 300M, the former Soviet Union 30CrMnSiNi2A and etc., which aspect of the strength index of the steel is the same. The actual use strength of its cold-rolling thinner plate exceeds 180 kg／mm2, and its extending rate exceeds 8%. The aspect of anti-bullet function exceeds American helmet to use the high-carbon, high-manganese and high-alloy austenitic steel, Japan, the former Soviet Union, Germany bulletproof to use the low-and-middle alloy steel of extra high strength, all of these proves that this steel is very excellent on integral performance. But, it is not perfect, and its anticreeping carbon ability is lower and its later stage of heat-treating equipment needs higher.

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