1. Grade: 

(1) Carbon steel:

Chinese Standard: 20#, 25#, 35#, 45#, 50#, 60#;

Japan Standard: S20C, S25C, S35C, S45C, S55C, S60C;

US Standard: AISI1020, AISI1040, AISI1045, AISI1050;

Europe Standard: CK15, C. 22, C45, CK45, C60, CK60; C45E;

(2) Alloy Steel: Chinese Standad: 16Mn, 20Mn, 30Mn2, 30Mn5, 40Cr, Q345D, Q345E, Q390; 42CrMo, 20CrMo, 38CrMoAl, 40CrNiMo; 48CrMo, 5CrNiMo; Janpan Standard: SCM415, SCM420, SCM440, SNCM439, SNCM220; SACM645 USA Standard: SAE4140, SAE4130, SAE9840, SAE4340, AISI4145H, SAE4150, SAE8620.

(3) Europe Standard:

42CrMo4, 25CrMo4, 34CrNiMo6, 39CrNiMo3, 17NiCrMo6, 18CrNiMo7-6, S355J2G3, ASTM A105, ST52-3, 16MnCr5, 20MnCr5, 16MnCrS5, 20MnCrS5, 21CrMoV511, 56NiCrMoV7, 18NiCrMo5, 30CrNiMo8, 34NiCrMo16, 41CrAlNi7, 34CrAlNi7, B7, B16, F11, F12, F22, F5, F9, 51Cr4.

Surface Treatment: painting,plating,polishing,black oxide,transparent anti-rust oil

Heat treatment: Normalized / Annealed / Quenched / tempered

Product Advantages:

1) High strength

2) Good machining property

3) Good comprehensive property balance