4Cr5MoSiV Tool Steel

The chemical ratio of 4Cr5MoSiV tool steel is particularly strengthened with Mo, Si and V elements, which endows it with excellent high-temperature strength, thermal hardness and thermal fatigue resistance, making it suitable for various mold applications that require high temperature, high pressure and repeated thermal shock.

4Cr5MoSiV Tool Steel – Product Forms & Inventory Specifications

Supply Condition

  1. Annealed
  2. Machined

Available Forms

  1. Round bars
  2. Plates / Flat bars
  3. Custom-cut pieces

Processing Services

  1. Sawing.
  2. Rough machining.
  3. Custom heat treatment.

Standard Size Range (Availability varies by stock)

  1. Diameter (Round bar): Φ10 mm – Φ65 mm / Φ70 mm – Φ400 mm / Φ500 mm / Φ600 mm / Φ700 mm.
  2. Plate/Flat Thickness: 8 – 45 mm / 50 – 500 mm.
  3. Width: 50 – 1000 mm / 50 – 1500 mm.
  4. Forged Discs: Up to Ø1200 mm.

4Cr5MoSiV Tool Steel – Forming Methods

  1. Hot Rolled
  2. Hot Forged

4Cr5MoSiV Tool Steel – Surface Finish Options

  1. Black.
  2. Grinded.
  3. Sandblasted.
  4. Turned/Machined/Milled/Bright.
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What is 4Cr5MoSiV Tool Steel?

4Cr5MoSiV is a domestic hot work tool steel developed in accordance with the GB/T 1299 series standards. It is one of the most important steel grades in China corresponding to international H13 (DIN 1.2344 / JIS SKD61 / ASTM H13).

International Equivalent Grades of 4Cr5MoSiV Tool Steel

International Equivalent Grades of 4Cr5MoSiV Tool Steel

Chemical Composition of 4Cr5MoSiV Tool Steel

Chemical Composition of 4Cr5MoSiV Tool Steel

4Cr5MoSiV Steel Product Specifications

4Cr5MoSiV Steel Product Specifications

4Cr5MoSiV Steel Heat Treatment and Performance Indicators

  1. Annealing: 860-890 °C slow cooling followed by furnace cooling. Annealing hardness approximately  ≤229 HBW (for ease of machining).
  2. Quenching: 1020-1080 °C followed by oil cooling or air cooling, with hardness reaching  56-58 HRC; The hardness of large cross-sections is slightly lower.
  3. Tempering: Double tempering at 560-580 °C, with the final hardness stabilized at 47-49 HRC; Low-temperature tempering can also be used to relieve stress.

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