18CrNiMo7-6 vs 22MnB5: 37% composition overlap. Significantly different materials serving different application areas.
18CrNiMo7-6 vs 22MnB5
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.
22MnB5
1.5528
THE press hardening (hot stamping) boron steel — used in virtually every modern car for B-pillars, bumper beams, and side impact reinforcements. As-delivered: ferritic-pearlitic, UTS 450-750 MPa, formable. After hot stamping + die quenching: fully martensitic, UTS 1300-1650 MPa. Boron (0.002-0.005%) provides critical hardenability at low cost. Usually AlSi or Zn coated to prevent oxidation during austenitizing at 880-950°C.
| 18CrNiMo7-6 | 22MnB5 | |
|---|---|---|
| Material Number | 1.6587 | 1.5528 |
| Category | Alloy Steel | Alloy Steel |
| Standard | EN 10084 | EN 10083-3 |
Chemical composition (wt%)
| Element | 18CrNiMo7-6 | 22MnB5 | Overlap |
|---|---|---|---|
| C | 0.15–0.21% | 0.2–0.25% | 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 | 22MnB5 | Unit |
|---|---|---|---|
| hardness_hrc | 58–62 | 42–50 | HRC |
| tensile_strength | 1050–1350 | 450–750 | MPa |
| hardness_hb | ≤ 229 | — | HB |
Compatibility Assessment
18CrNiMo7-6 and 22MnB5 have significantly different compositions (37% overlap). These materials are not interchangeable and serve different application areas.
Automated assessment based on composition analysis
Frequently Asked Questions
Is 18CrNiMo7-6 the same as 22MnB5?
18CrNiMo7-6 and 22MnB5 have a 37% composition overlap. They are generally not directly interchangeable.
Can I replace 18CrNiMo7-6 with 22MnB5?
Generally not recommended. The compositions differ significantly (37% overlap). These materials have different alloying concepts and are intended for different applications.
What is the difference between 18CrNiMo7-6 and 22MnB5?
The main differences are in the following elements: C, Mn, Cr. 18CrNiMo7-6 is a Alloy Steel grade, while 22MnB5 is a Alloy Steel grade.
View full data for each material:
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.