Chemical composition 
 Element C Si Mn Cr MO Ni 
 Content (%) 0.3 1.4 2.0 0.2 0.9 0.33 


 Factory hardness: Pre-hardened to 35 ~ 39HRC 

 Features: pre-hardening process, uniform hardness, good polishing, high tensile strength and compressive strength 
 Uses: Large plastic injection products, such as home appliances, computer casings, etc., required more than 50 million times the production of plastic injection products, heavy-duty plastic model of the slider, compression molds.