In general, we select the steel according to the functional of parts :

1.For mold base part : 45#、S45C、S50C etc.

2.For mold cavity / core: P20、2311、738、738H、718、718H、NAK80、2316、2316H、2083、2083H、S136、S136H etc

3. For harden treatment material: 2344、8407、SKD11、SKD61H13、etc.

3.For Shaped parts : perhardened steel would be good choice. Such as P20、P5、NAK55、NAK80、738、718、420.

4.For cooling parts , choices including aluminum alloy steel, brass, red bronze, BeCu and pure copper.