100Cr6 vs 18CrNiMo7-6: 30% composition overlap. Significantly different materials serving different application areas.
100Cr6 vs 18CrNiMo7-6
Side-by-side chemical composition and mechanical property comparison.
Overview
100Cr6
1.3505
High-carbon chromium bearing steel. The most widely used bearing steel worldwide. Extremely high hardness and wear resistance after heat treatment. Standard for ball and roller bearings, precision shafts, and measuring instruments.
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.
| 100Cr6 | 18CrNiMo7-6 | |
|---|---|---|
| Material Number | 1.3505 | 1.6587 |
| Category | Alloy Steel | Alloy Steel |
| Standard | EN ISO 683-17 | EN 10084 |
Chemical composition (wt%)
| Element | 100Cr6 | 18CrNiMo7-6 | Overlap |
|---|---|---|---|
| C | 0.93–1.05% | 0.15–0.21% | No overlap |
| Si | 0.15–0.35% | 0–0.4% | OK |
| Mn | 0.25–0.45% | 0.5–0.9% | No overlap |
| P | 0–0.025% | 0–0.025% | OK |
Mechanical properties
| Property | 100Cr6 | 18CrNiMo7-6 | Unit |
|---|---|---|---|
| hardness_hrc | 60–66 | 58–62 | HRC |
| hardness_hb | ≤ 223 | ≤ 229 | HB |
| e_modulus | ≥ 210 | ≥ 210 | GPa |
Compatibility Assessment
100Cr6 and 18CrNiMo7-6 have significantly different compositions (30% overlap). These materials are not interchangeable and serve different application areas.
Automated assessment based on composition analysis
Frequently Asked Questions
Is 100Cr6 the same as 18CrNiMo7-6?
100Cr6 and 18CrNiMo7-6 have a 30% composition overlap. They are generally not directly interchangeable.
Can I replace 100Cr6 with 18CrNiMo7-6?
Generally not recommended. The compositions differ significantly (30% overlap). These materials have different alloying concepts and are intended for different applications.
What is the difference between 100Cr6 and 18CrNiMo7-6?
The main differences are in the following elements: C, Mn, Cr, Mo. 100Cr6 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.