English
English
Strength: 6 Materials: carbon steel, alloy steel
Material: medium carbon steel
Material description: C 0.42-0.50, Mn0.50-0.80，Si0.17-0.37，Cr≤0.25，Cu≤0.30，Ni≤0.30，P≤0.035，S≤0.035， It is similar to American grade 1045, Japanese grade S45C, German, British, and French C45, and ISO standard C45E4
Surface treatment: Blackening (without quenching)
Surface treatment content: Blackening is a common method of metal heat treatment, which is to create a layer of oxide film on the metal surface to isolate air and achieve the purpose of rust prevention.
