Tool steels are crucial in the manufacturing and mold-making industries due to their excellent strength, hardness, and resistance to deformation at high temperatures. One widely used tool steel grade is 1.2311, which is known for its good polishability, machinability, and uniform hardness. For international engineers, importers, or manufacturers who deal with various steel standards such as AISI, DIN, JIS, and EN, understanding the equivalent of steel grades like 1.2311 is essential.
This article explores the tool steel equivalents of 1.2311, its properties, common applications, and how to make the best sourcing decisions for tool steel in global markets.
1.2311 is a pre-hardened plastic mold steel under the DIN (Deutsches Institut für Normung) standard. It is primarily used for plastic molds and tooling that require excellent polishability and good toughness.
The typical composition of 1.2311 is:
Carbon (C): 0.35 – 0.40%
Chromium (Cr): 1.80 – 2.10%
Manganese (Mn): 1.30 – 1.60%
Molybdenum (Mo): 0.15 – 0.25%
Silicon (Si): 0.20 – 0.40%
This chemical balance gives 1.2311 excellent properties for plastic mold applications and machining.
When working internationally or sourcing from different suppliers, knowing the equivalent grades of 1.2311 in other standards is vital. Here are the most recognized equivalents:
| Standard | Equivalent Grade |
|---|---|
| AISI / SAE | P20 |
| JIS (Japan) | SCM4 |
| GB (China) | 3Cr2Mo |
| EN (Europe) | 40CrMnMo7 |
Both grades are prehardened to about 28-32 HRC, making them ready to use without further heat treatment in most applications.
Tool steels like 1.2311 and its equivalent P20 are highly versatile. Common applications include:
Injection mold bases
Blow molds
Die casting molds
Machinery parts
Plastic forming tools
Prototype tooling
Due to their good dimensional stability and high impact strength, these materials are suitable for medium and large-sized molds.
Using equivalent grades like P20 or SCM4 in place of 1.2311 can offer flexibility and cost-efficiency. Here are some of the major benefits:
With equivalents like P20 and SCM4, users can source similar materials globally from trusted suppliers like sakysteel.
Equivalents may be more readily available or cost-effective in certain regions, allowing for better procurement strategies.
Most equivalents of 1.2311 are manufactured to provide similar hardness, toughness, and machining behavior.
Using equivalents ensures that production is not halted due to a lack of 1.2311 availability.
Choosing the right equivalent requires consideration of several factors:
If you are working in North America, P20 is the best choice. In Japan, SCM4 is more commonly used.
Consider the required hardness, thermal conductivity, polishability, and wear resistance. All equivalents are not 100% interchangeable.
Ensure the material is certified according to international standards. sakysteel offers MTC (Mill Test Certificate) for all tool steel supplies.
Although 1.2311 and its equivalents are supplied in pre-hardened condition, additional surface treatment or nitriding can improve wear resistance.
Use carbide cutting tools
Maintain steady coolant supply
Avoid high cutting speeds to reduce work hardening
Annealing is not required before use
Surface nitriding can enhance wear resistance without altering core toughness
1.2311 and its equivalents offer good polishability, especially important in plastic mold making. A mirror finish is achievable when proper polishing techniques are used.
When sourcing 1.2311 or its equivalents like P20, it’s essential to work with trusted steel suppliers.
sakysteel, a professional stainless and alloy steel supplier, offers:
Certified 1.2311 / P20 tool steel
Cut-to-size services
Global shipping
MTC documentation
sakysteel ensures stable quality, traceability, and competitive pricing across all major tool steel grades.
Understanding the tool steel equivalent of 1.2311 is crucial for effective material selection in plastic mold and tooling applications. The most common equivalent is AISI P20, which shares similar mechanical and chemical properties. Other equivalents include SCM4 in Japan and 3Cr2Mo in China.
Whether you’re working on injection molds, die cast parts, or heavy-duty tooling, using the correct equivalent material ensures optimal performance and cost-efficiency. Always consult your material engineer and rely on reputable suppliers like sakysteel to meet your tool steel requirements.