18CrNiMo7-6 vs 20MnCr5: 60% composition overlap. Moderate differences, generally not direct substitutes.
18CrNiMo7-6 vs 20MnCr5
Side-by-side chemical composition and mechanical property comparison.
Overview
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.
20MnCr5
1.7147
Manganese-chromium case-hardening steel with higher core strength than 16MnCr5. Used for heavily loaded gears, shafts, camshafts, and transmission components requiring high surface hardness with tough core. Popular in automotive and heavy machinery.
| 18CrNiMo7-6 | 20MnCr5 | |
|---|---|---|
| Material Number | 1.6587 | 1.7147 |
| Category | Alloy Steel | Alloy Steel |
| Standard | EN 10084 | EN 10084 |
Chemical composition (wt%)
| Element | 18CrNiMo7-6 | 20MnCr5 | Overlap |
|---|---|---|---|
| C | 0.15–0.21% | 0.17–0.22% | Partial |
| Si | 0–0.4% | 0–0.4% | OK |
| Mn | 0.5–0.9% | 1.1–1.4% | No overlap |
| P | 0–0.025% | 0–0.025% | OK |
Mechanical properties
| Property | 18CrNiMo7-6 | 20MnCr5 | Unit |
|---|---|---|---|
| hardness_hrc | 58–62 | 58–62 | HRC |
| tensile_strength | 1050–1350 | 900–1200 | MPa |
| hardness_hb | ≤ 229 | ≤ 217 | HB |
Compatibility Assessment
18CrNiMo7-6 and 20MnCr5 have moderate differences (60% overlap). They are generally not direct substitutes. Consider the specific requirements of your application.
Automated assessment based on composition analysis
Frequently Asked Questions
Is 18CrNiMo7-6 the same as 20MnCr5?
18CrNiMo7-6 and 20MnCr5 have a 60% composition overlap. They are generally not directly interchangeable.
Can I replace 18CrNiMo7-6 with 20MnCr5?
Generally not recommended. The compositions differ significantly (60% overlap). These materials have different alloying concepts and are intended for different applications.
What is the difference between 18CrNiMo7-6 and 20MnCr5?
The main differences are in the following elements: C, Mn, Cr. 18CrNiMo7-6 is a Alloy Steel grade, while 20MnCr5 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.