A2 / X100CrMoV5 vs D2 / X155CrVMo12-1: 22% composition overlap. Significantly different materials serving different application areas.
A2 / X100CrMoV5 vs D2 / X155CrVMo12-1
Side-by-side chemical composition and mechanical property comparison.
Overview
A2 / X100CrMoV5
1.2363
Air-hardening cold-work tool steel. Combines good wear resistance with excellent dimensional stability during heat treatment (minimal distortion). Used for punching/blanking dies, forming tools, shear blades, gauges, and precision tooling where low distortion is critical.
D2 / X155CrVMo12-1
1.2379
Premium high-carbon high-chromium cold-work tool steel with vanadium and molybdenum. Air-hardening with minimal distortion. Superior wear resistance and edge retention. The global benchmark for cold stamping dies, blanking tools, shear blades, and forming tools.
| A2 / X100CrMoV5 | D2 / X155CrVMo12-1 | |
|---|---|---|
| Material Number | 1.2363 | 1.2379 |
| Category | Tool Steel | Tool Steel |
| Standard | EN ISO 4957 | EN ISO 4957 |
Chemical composition (wt%)
| Element | A2 / X100CrMoV5 | D2 / X155CrVMo12-1 | Overlap |
|---|---|---|---|
| C | 0.95–1.05% | 1.45–1.6% | No overlap |
| Si | 0.1–0.4% | 0.1–0.4% | OK |
| Mn | 0.4–0.8% | 0.15–0.45% | Partial |
| P | — | 0–0.03% | — |
Mechanical properties
| Property | A2 / X100CrMoV5 | D2 / X155CrVMo12-1 | Unit |
|---|---|---|---|
| hardness_hrc | 57–62 | 58–62 | HRC |
| hardness_hb | ≤ 229 | ≤ 255 | HB |
| e_modulus | ≥ 210 | ≥ 210 | GPa |
Compatibility Assessment
A2 / X100CrMoV5 and D2 / X155CrVMo12-1 have significantly different compositions (22% overlap). These materials are not interchangeable and serve different application areas.
Automated assessment based on composition analysis
Frequently Asked Questions
Is A2 / X100CrMoV5 the same as D2 / X155CrVMo12-1?
A2 / X100CrMoV5 and D2 / X155CrVMo12-1 have a 22% composition overlap. They are generally not directly interchangeable.
Can I replace A2 / X100CrMoV5 with D2 / X155CrVMo12-1?
Generally not recommended. The compositions differ significantly (22% overlap). These materials have different alloying concepts and are intended for different applications.
What is the difference between A2 / X100CrMoV5 and D2 / X155CrVMo12-1?
The main differences are in the following elements: C, Mn, Cr, Mo. A2 / X100CrMoV5 is a Tool Steel grade, while D2 / X155CrVMo12-1 is a Tool Steel grade.
Related Comparisons
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Data provided for reference only. Always verify against the applicable specification for critical applications.
All data is for reference only. Equivalents indicate similarity, not identity. Always verify against the applicable specification for safety-critical applications. materialref.com accepts no liability for decisions based on this data.