10CrMo9-10 vs 18CrNiMo7-6: 36% composition overlap. Significantly different materials serving different application areas.
10CrMo9-10 vs 18CrNiMo7-6
Side-by-side chemical composition and mechanical property comparison.
Overview
10CrMo9-10
1.7380
Low-carbon Cr-Mo steel for elevated temperature pressure equipment. Excellent creep resistance up to 530°C. The standard grade for boiler tubes, headers, and pressure vessels in power generation and petrochemical industries.
18CrNiMo7-6
1.6587
Premium Cr-Ni-Mo case-hardening steel for the most demanding gear applications. Excellent core toughness and hardenability for large cross-sections. The standard gear steel for wind turbines, heavy-duty gearboxes, and aerospace gearing.
| 10CrMo9-10 | 18CrNiMo7-6 | |
|---|---|---|
| Material Number | 1.7380 | 1.6587 |
| Category | Alloy Steel | Alloy Steel |
| Standard | EN 10028-2 | EN 10084 |
Chemical composition (wt%)
| Element | 10CrMo9-10 | 18CrNiMo7-6 | Overlap |
|---|---|---|---|
| C | 0.08–0.14% | 0.15–0.21% | No overlap |
| Si | 0–0.5% | 0–0.4% | OK |
| Mn | 0.4–0.8% | 0.5–0.9% | Partial |
| P | 0–0.02% | 0–0.025% | OK |
Mechanical properties
| Property | 10CrMo9-10 | 18CrNiMo7-6 | Unit |
|---|---|---|---|
| tensile_strength | 450–600 | 1050–1350 | MPa |
| yield_strength | ≥ 280 | — | MPa |
| elongation | ≥ 18 | — | % |
Compatibility Assessment
10CrMo9-10 and 18CrNiMo7-6 have significantly different compositions (36% overlap). These materials are not interchangeable and serve different application areas.
Automated assessment based on composition analysis
Frequently Asked Questions
Is 10CrMo9-10 the same as 18CrNiMo7-6?
10CrMo9-10 and 18CrNiMo7-6 have a 36% composition overlap. They are generally not directly interchangeable.
Can I replace 10CrMo9-10 with 18CrNiMo7-6?
Generally not recommended. The compositions differ significantly (36% overlap). These materials have different alloying concepts and are intended for different applications.
What is the difference between 10CrMo9-10 and 18CrNiMo7-6?
The main differences are in the following elements: C, Mn, Cr, Mo. 10CrMo9-10 is a Alloy Steel grade, while 18CrNiMo7-6 is a Alloy Steel grade.
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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.