How To Select Suitable Mould Steel?

At SWY MOULD, we use several types of mould steel, each with different properties to meet various customer needs. Below is an overview of the common mould steels we use:

1. Cavity/Core, Slider, Angle Lifter, Insert, etc.:

• Basic with lower mold life (most affordable):

45# (ANSI: C1045; DIN: CK40; JIS: S45C), 50# (ANSI: C1050; DIN: CK53; JIS: S50C)

• For common requirements:

P20 prehardening mold steel (ANSI: P20; DIN: 1.2311; Sweden: 618; GB: 3Cr2Mo)

• For slightly higher requirements:

718 super pre-hardening mold steel (ANSI: P20+Ni; DIN: 1.2738; Sweden: 718; GB: 3Cr2NiMo)

• For higher requirements:

738 (GB: 4Cr2NiMnMo)

• For high gloss polish requirements:

NAK80 (ANSI: 921H; JIS: NAK80; GB: 12Ni3)

• For corrosion resistance (when the raw material may corrode the mold):

M300 (Austria), GB: 3Cr17Mo

• For both high gloss polish and corrosion resistance:

S136H (ANSI: 420; DIN: 1.2083; Sweden: S136H; GB: 3Cr13)

2. Mold Base:

• For the lowest requirements:

45# (ANSI: C1045; DIN: CK40; JIS: S45C)

• For common requirements:

50# (ANSI: C1045; DIN: CK53; JIS: S50C)

• For common requirements with larger sizes:

55# (ANSI: C1055; DIN: CK56; GB: S55C)

• For high requirements with larger sizes:

GS638 (ANSI: P20; DIN: GS638; GB: 42CrMo)

3. Spare Parts:

• Guide pillar:

20# (S20C) or 20Mn2B (SMn420), treated by carburizing and quenching to over 55HRC;

T8A & T10A, treated with surface hardening to under 55HRC;

45#, treated with tempering, surface hardening, and low temperature for over 55HRC

• Guide bush:

Brass H62 or bronze alloy

• Bush sleeve:

45#, 50#, 55#, treated with surface hardening for over 55HRC

• Push rod, ejector pin, sprue puller, etc.:

T8, T8A, T10, T10A, treated with hardening and low temperature for over 55HRC;

45#, 50#, 55#, treated with hardening for over 45HRC

• All plate materials:

45#, 50#, 40Cr (hardened & tempered);

Structure steel: Q235–Q275;

Large plates: ductile cast iron

If you're unsure which mold steel or spare parts to choose, feel free to contact Shine at shine@swymould.com or +86 157 5766 8880. We can guide you through the process or help you select the most suitable materials based on your specific requirements.