Ideal Material 4kh5mfs Stee For Aluminum And Zinc Alloy Die Casting Molds - China

Why 4KH5MFS Steel is an Ideal Material for Aluminum and Zinc Alloy Die-Casting Molds

1 - Excellent thermal fatigue resistance and resistance to thermal cracking (a key pain point in die-casting)

Die-casting cycle: Filling with high-temperature molten metal followed by rapid water cooling; the mold cavity repeatedly withstands severe thermal shock.

- Cr-Mo-V composite alloy system balances thermal conductivity and toughness, making it resistant to surface network-like thermal cracking;

- Zinc alloy casting temperatures range from 380–430°C and aluminum alloys from 600–680°C; this steel retains stable high-temperature hardness at 600°C, resisting surface peeling and cracking during long-term cycling;

- ESR (Electroslag Remelting) ensures extremely low inclusion levels and uniform hardness in large mold cores with strong isotropy, significantly reducing premature failure due to edge chipping or cracking.

2 - Resistance to molten metal erosion; reduced aluminum/zinc sticking and galling

- High chromium content forms a dense protective oxide film that isolates the mold from chemical erosion by molten aluminum or zinc, preventing pitting and erosion in the cavity;

- Compatibility with nitriding and PVD coatings doubles anti-sticking performance, resulting in smooth casting surfaces and reduced frequency of polishing or mold repair;

- Offers over 40% greater resistance to aluminum erosion compared to standard 5CrNiMo or 8402 steels.

3 - Dual compatibility for zinc and aluminum die-casting; exceptional versatility

1) **Zinc alloy die-casting (low-temperature conditions)**

Low melting points and mild corrosivity make 4KH5MFS steel highly cost-effective; ideal for toys, hardware, and small decorative parts, with a stable service life of 80, 000–150, 000 shots;

2) **Aluminum alloy die-casting (high-temperature, high-pressure conditions)**

For automotive and 3C structural components (e.g., A380, ADC12 alloys), this steel serves as a preferred upgrade to H13 (4Cr5MoSiV1); it withstands high-temperature erosion, achieving a service life of 100, 000–300, 000 shots;

High-wear components such as shot sleeves, spreader cones, and cores can all be manufactured using this steel series.

Company Contact:

• Posted By: Dongguan Songshun Mould Steel Co., Ltd.

• Phone: 0086 0769 85475596

• Address: 1st Floor, No. 1, Dongda Fourth Street, Shatou Community, Chang'an Town, Dongguan , GuangDong , China

• Email:

• Website: https://songshunsteel.com/

• Business Description: Established in 2009,Songshun Steel supplies a wide range of carbon, alloy and tool steel products, including high speed tool steel, cold work tool steel, hot work tool steel, plastic mould steel, engineering steel and machine structural steel etc.
  
  After more than 10 years development and growing, Songshun Steel becomes one comprehensive special steel factory, stockist and exporter.
  
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