Gost 4kh5mf1s Steel For Die Casting Dies Why Engineers Choose It - China

GOST 4KH5MF1S steel is a Russian GOST-standard 5% chromium hot‑work tool steel, widely recognised as the GOST counterpart to global benchmark AISI H13 / DIN 1.2344 (X40CrMoV5‑1) / JIS SKD61for die‑casting tooling, governed by GOST 5950 - It is the dominant choice for aluminium, magnesium and zinc high‑pressure die‑casting dies across Russia, CIS and many international foundries.

The Main Reasons Engineers Select GOST 4KH5MF1S steel for Die‑Casting Dies

✅ Outstanding Thermal Fatigue Resistance (Anti Heat‑Checking)

Die casting dies suffer cyclic shock: molten aluminium (~660°C) fills the cavity, then rapid water‑cooling.

This repeated thermal expansion / contraction creates fine surface cracks called **heat checking**, the #1 failure mode for die casting moulds.

4Kh5MF1S’s Cr‑Mo‑V microstructure resists these surface cracks far better than low‑alloy hot work steels, greatly extending die service life in high‑volume production.

✅ Good Hot Hardness & Anti‑Temper Softening

When continuously exposed to hot molten metal, many steels gradually lose hardness.

Molybdenum and vanadium carbides keep 4Kh5MF1S retaining its hardness at service temperatures up to ~600°C, so the cavity surface will not deform or dent under high injection pressure.

✅ High Toughness + Resistance to Gross Cracking

Not only fine heat cracks: die blocks also risk catastrophic big cracks under clamping force and thermal shock.

GOST 4KH5MF1S steel delivers excellent impact toughness, reducing risk of sudden die split, especially for large dies with sharp corners, deep ribs and thin inserts.

It can safely run with internal water cooling channels.

✅ Erosion & Wash Resistance Against Molten Aluminium

High‑velocity molten alloy flow scours the die cavity surface at gates and runners.

Hard vanadium carbide phases improve resistance to molten metal wash, slowing cavity dimensional wear and keeping casting surface quality stable over tens of thousands of shots.

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• 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

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• 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.
  
  Combined with experienced exporting team and professional technical knowledge, Songshun Steel offers both technical advice and support, as well as global professional steel solution and service.
  
  Due to satisfactory reliable quality and professional service, Songshun expands our market worldwide, such as Colombia, Chile, Spain, Turkey, Iran, Vietnam, Malaysia ,UAE, Canada, Brazil, Mexico and so on.
  
  Songshun specialized in Special Steel for almost 20 years.
  
  We can supply mold steel, high speed steel, alloy steel, free cutting steel and etc.
  
  Welcome your contact 24 hours a day!!!
  
  Skype/Whatsapp/We chat: +86-18269260283
  
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