German Sa Site 2738 Pre-hardened plastic mold steel 
 Chemical composition: (C: 0.37) (Cr: 2.00) (Ni: 1.00) (Mn: 1.40) (Mo: 0.20) (S: <0.006) 
 2378 tool steel properties Application: 
 Steel to join nickel-component, uniform hardness, cutting good. The size of the high requirements for the plastic mold, especially for electrical erosion operation. 
 2738 added about 1% nickel content, the pre-hardness. 
 The addition of nickel to improve its hardenability performance, large cross-section hardness distribution plate. 
 2738 tool steel types: P20 steel 
 2738 tool steel strengths: Department of Pre-hardened mold steel, processing and polishing of the good. 
 2378 tool steel mainly used in large plastic mold, mold rack, such as car bumpers, TV shell, etc. Suitable for high degree of mold, such as finishing production PS (PS) and non-quenching super-glue (ABS), etc. 
 2378 tool steel characterized by: 
 Excellent processing performance, power polishing and cutting loss. 
 2738H in the 2738's based on the hard and improved by, adding nickel content of steel, even hardness, has excellent processing properties and polished performance. 
 Mainly used in high demand the size of the plastic mold for TV, fax machines, home appliances plastic parts, automotive components require a certain polishing plastic mold. 
 Factory state: 
 After hardening and tempering to HB290-330