In order to help mould users know what mould steel is suitable for their product, here our technical dept. share with everyone the classifications and functions of several common mould steels.

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.

Above is just the simple analysis for mould steels. If there are more questions, pls call national toll-free hotline of New Vision Plastic Mould Co.,Ltd: 400-189-0576. We will offer you our service faithfully!