... Plastic mould steel block 2) Specification: 120-800mm * 200-1900mm 3) Q+T 30-38HRC P20+Ni/3Cr2NiMo/DIN1.2738/718 ... /M238 Applications: Injection moulds for thermo-plastics, extrusion dies for thermo-plastics, blow moulds, forming tools, machine components.Steel ... ,250.90 – 1.20Similar grade: AISI-P20+Ni,718,M238Hardening : 1050 - 850 °C (oil)Delivery Condition ... Size, 400x 500mm P20+Ni/ 718 mould steel