Mechanic industry

1.2312 vs. P20: Steel Material Comparison

Below is a brief comparison of steel materials 1.2312 and P20, both popular choices for mold manufacturing. These materials are often used in various industrial applications, and understanding their differences can be vital in selecting the right material for a specific project.

1.2312 vs. P20: Steel Material Comparison

1.2312 Steel

  • Composition: Typically contains 0.4% C, 1.9% Mn, 1.5% Cr, 0.2% Mo, 0.03% S
  • Hardness: Around 28-32 HRC
  • Properties: Excellent machinability, improved toughness compared to standard P20, and good weldability
  • Applications: Suitable for plastic molds, die casting molds, and other tooling applications

P20 Steel

  • Composition: Generally contains 0.28-0.4% C, 0.6-1% Mn, 1.4-2% Cr, 0.3% Mo
  • Hardness: Roughly 28-32 HRC
  • Properties: Good machinability, polishability, and decent toughness
  • Applications: Widely used in plastic injection molds, die holders, backers, etc.

Here’s a comparison table summarizing the key aspects:

Property1.2312 SteelP20 Steel
Carbon (C)0.4%0.28-0.4%
Manganese (Mn)1.9%0.6-1%
Chromium (Cr)1.5%1.4-2%
Molybdenum (Mo)0.2%0.3%
Hardness (HRC)28-3228-32
ApplicationsPlastic molds, die castsPlastic injection molds


While 1.2312 and P20 are quite similar in terms of hardness and general applications, 1.2312 offers improved toughness and may provide better performance in specific scenarios. Understanding the exact requirements of a project is crucial in selecting the appropriate steel material.

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