What Is the Chinese Equivalent of D2 Steel?
For buyers searching for the Chinese equivalent of D2 steel, the corresponding grade in the Chinese GB (Guojia Biaozhun) standard system is Cr12Mo1V1.
For specifications, supply forms, and inspection standards, see our D2 Tool Steel product page.
Both D2 and Cr12Mo1V1 are high-carbon, high-chromium cold-work tool steels used where high wear resistance, deep hardening capability, and dimensional stability after heat treatment are required.
Why Equivalent Grades Exist in Tool Steel Standards
When comparing steels across different national or international standards, there is rarely a perfectly identical equivalent grade. Instead, steels are typically treated as comparable when their chemical composition ranges and performance characteristics are similar.
This occurs because different countries historically developed independent steel standards. As a result, allowable alloying limits may differ slightly between systems.
Therefore, while Cr12Mo1V1 is widely recognized as the Chinese equivalent of D2 tool steel, the full specification should still be reviewed before substitution in critical tooling applications.
Chemical Composition Comparison
The chemical compositions of AISI D2 and GB Cr12Mo1V1 are highly similar, which is why they are generally considered functional equivalents for cold-work tooling.
| Element | AISI D2 (ASTM A681) | Cr12Mo1V1 (GB) |
| Carbon (C) | 1.40–1.60% | 1.40–1.60% |
| Chromium (Cr) | 11.00–13.00% | 11.00–13.00% |
| Molybdenum (Mo) | 0.70–1.20% | 0.70–1.20% |
| Vanadium (V) | 0.50–1.10% | ≤1.10% |
| Manganese (Mn) | 0.30–0.50% | ≤0.60% |
| Silicon (Si) | 0.10–0.60% | ≤0.60% |
| Cobalt (Co) | — | ≤1.00% |
Sources: ASTM A681 tool steel standard; Die Materials and Heat Treatment Technology Q&A
The high carbon and chromium content promotes the formation of chromium-rich carbides, responsible for their high wear resistance.
International Equivalent Grades of D2 Tool Steel
Because D2 is widely used in the tooling industry worldwide, multiple international standards define closely comparable grades.
| Standard System | Equivalent Grade |
| AISI / ASTM (USA) | D2 |
| GB (China) | Cr12Mo1V1 |
| DIN / EN (Germany) | 1.2379 |
| JIS (Japan) | SKD11 |
| AFNOR (France) | Z160CDV12 |
| BS (United Kingdom) | BD2 |
| SS (Sweden) | 2310 |
In addition to these standardized grades, several steel manufacturers produce proprietary versions of the same material family, including ASSAB XW-42, Hitachi SLD, Daido DC11, and Böhler K110.
Are D2 and Cr12Mo1V1 Interchangeable?
Although Cr12Mo1V1 is commonly treated as the Chinese equivalent of D2 steel, international grade substitution should still be evaluated carefully. Even small variations in composition limits or steelmaking processes can influence factors such as:
- carbide distribution
- retained austenite levels
- hardenability
- toughness after tempering
For this reason, cross-standard substitutions should be validated through engineering review and heat-treatment evaluation, especially for tooling subjected to high loads or long production cycles.
Typical Industrial Applications
D2 and its international equivalents are widely used in demanding cold-working operations because of their combination of high wear resistance and dimensional stability. Typical applications include:
- Blanking dies and punching dies
- Cold-forming and deep drawing dies
- Thread-rolling dies
- Shear blades and slitter knives
- Forming rolls
- Precision gauges and measuring tools
Notes for International Procurement
When purchasing Cr12Mo1V1 as the Chinese equivalent of D2 steel, buyers should confirm compliance with the required specifications and heat-treatment conditions. In practical procurement, engineers often verify additional factors such as:
- internal cleanliness and inclusion ratings
- carbide distribution uniformity
- dimensional tolerances and inspection standards
Selecting materials purely on the basis of chemical composition without considering metallurgical processing and heat treatment can reduce tooling life or cause premature failure.
Technical Summary
The Chinese equivalent of D2 steel is the GB standardized grade Cr12Mo1V1. Both steels belong to the family of high-carbon, high-chromium cold-work tool steels containing approximately 1.40–1.60% carbon and 11–13% chromium.
Because their chemical compositions and heat-treatment responses are highly comparable, the two grades are widely used in similar tooling applications such as blanking dies, forming tools, and shear blades. However, as with any international material substitution, the full specifications and processing conditions should be reviewed before use in production.
Related Page
FAQ
The corresponding Chinese grade for D2 tool steel in the GB (Guojia Biaozhun) standard system is Cr12Mo1V1. Both are high-carbon, high-chromium cold-work tool steels.
They are highly similar, featuring 1.40–1.60% carbon and 11.00–13.00% chromium. They also share comparable levels of molybdenum and vanadium, ensuring high wear resistance.
While generally considered functional equivalents, they should be evaluated carefully before substitution. Small variations in composition or steelmaking can affect carbide distribution, hardenability, and toughness.
Like D2, Cr12Mo1V1 is used for blanking, punching, and thread-rolling dies. It is also ideal for shear blades, forming rolls, and precision gauges.
Equivalent grades exist because different countries historically developed independent steel standards. This results in slight variations in allowable alloying limits across national systems such as AISI and GB.
Buyers should verify internal cleanliness, uniform carbide distribution, and dimensional tolerances. It is also critical to confirm compliance with required heat-treatment conditions and inspection standards.
Yes, its high carbon and chromium content promotes chromium-rich carbides that provide excellent wear resistance. This makes it suitable for demanding cold-working operations and long production cycles.