Inner Mould Components (Core Insert and Cavity Insert, Slider,Lifter,Insert and etc)
Mould with Low Requirement,Cheapest or less Mould life: 45# (C1045 American Standard, CK40 German Standard, S45C Japanese Standard), 50# (C1045 American Standard, CK53 German Standard, S45C Japanese Standard)

Mould with Common Requirement: P20 Pre-hardened plastic mould steel (P20 American Standard, 1.2311 German Standard, 618 Sweden, 3Cr2Mo Chinese Standard)
Mould with a Little High Requirement: 718 super pre hardened plastic mould steel (P20+Ni American Standard, 1.2738 German Standard, 718 Sweden, 3Cr2NiMo Chinese Standard)
Mould with Higher Requirement: 738 (4Cr2NiMnMo Chinese Standard)
Mould needing polishing to be mirror gloss: NAK80 (P21H American Standard, NAK80 Japanese Standard, 12Ni3 Chinese Standard) Mirrored plastic mould steel

Corrosion-resistant plastic mould: If the plastics,using for injection, engender corrosive gas to corrode mould, choose M300 Corrosion-resisting steel (Austria) (3Cr17Mo Chinese Standard).It need mirror polishing while using.

S136H corrosion-resistant mirrored mould steel (420 American Standard, 1.2083 German Standard, S136H Sweden, 3Cr13 Chinese Standard)

Mould Base:

Mould with the minimum requirement: 45# (C1045 American Standard, CK40 German Standard, S45C Japanese Standard)

Common: 50# (C1045 American Standard, CK53 German Standard, S50C Japanese Standard)

Large Mould Base with General Requirement: 55# (C1045 American Standard, CK56 German Standard,S55C Chinese Standard)

Large Mould Base with High Requirement: GS638 (P20 American Standard, GS638 German Standard, 42CrMo Chinese Standard)

Accessories

Guide Pillar:20# (S20C) or 20Mn2B (SMn420). Treatment: Carburizing and quenching. Hardness is no less than 55HRC after treatment.

T8A,T10A: Treatment: surface hardening. Hardness is no more than 55HRC after treatment.

45# Treatment:hardening and tempering, surface hardening,and low temperature tempering. Hardness is no less than 55HRC after treatment.

Guide Sleeve: Brass H62 or Bronze Alloy
Bushing Block: 45#,50#,55#. Treatment: Surface hardening. Hardness is no less than 55HRC
Push Rod,Ejector Pin,Sprue Puller and etc.: T8,T8A,T10,T10A Treatment:quenching, low temperature tempering. Hardness is no less than 55HRC

45#,50#,55# Treatment:quenching. Hardness is no less than 45HRC.

All plate materials: 45#,50#,40Cr (quenching and tempering);structural steel:Q235-Q275; Large plates: Ductile Cast Iron.