Pins and keys: Japan-S45C
America-1040-1050
Germany- CK45
China-35#,45#
Stamping parts: Japan-SK5、SK7
America-1050-1075
Germany-StCk67、1070-1095
China-65mn、T8、T10、50CrV、60Si2mn
Note: 65mn is the preferred material in China