Large-scale mold plate, the surface of the requirements of household appliances. b) applies to a large mirror plastic mold, such as cars, home appliances, audio and video products. c) can be used to mirror polishing requirements of plastic mold, suitable for PA, POM, PS, PE, PP, ABS, plastic injection mold, blow mold. d) The highly-polished, and high requirements of the mold cavity. 

 Chemical composition 
 Element c Si Mn Mo Cr Ni 
 0.28 ~ 0.40 0.20 ~ 0.80 0.60 ~ 1.00 0.30 ~ 0.55 1.40 ~ 2.00 0.80 ~ 1.20