There is also a lot of knowledge in material selection of injection mold products.Good injection mold is the quality of the material. The following is a brief introduction of the plastic mold steel material, which is often used for the inner mold pieces (mold kernels, sliders, inclined tops, inserts, etc.) :
No required molds, cheap or not used much: 45# (C1045 US CK40 German S45C standard), 50# (C1045 US CK53 German S50C standard)
General requirements: P20 pre-hardened plastic mold steel (P20 US 1.2311 German 618 Swedish 3Cr2Mo GB)
High demand mold: 718 super hard plastic mold steel (P20+Ni American standard 1.2738 German standard 718 Swedish 3Cr2NiMo NATIONAL standard)
Mold with higher requirements: 738 (4Cr2NiMnMo NATIONAL Standard)
The mold shall be polished to mirror gloss: MIRROR plastic mold steel NAK80 (P21H American standard NAK80 Japanese standard 12Ni3).
High quality materials can have high quality mold, and then to injection qualified products.