65mn carbon steel???

What I found on it.

The mechanical properties of 65Mn Spring Steels are outlined in the following table. 65Mn steel, after heat treatment and cold drawing hardening, high strength, it has a certain toughness and plasticity; In the same surface hardening case, completely and the fatigue limit and alloy spring.
65Mn Spring Steel | 080A67 | 1066 -GB/T 1222 - Special steel china ...
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65mn carbon steel???