22MnB5 vs 27MnCrB5-2: 65% composition overlap. Moderate differences, generally not direct substitutes.
22MnB5 vs 27MnCrB5-2
Side-by-side chemical composition and mechanical property comparison.
Overview
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.
27MnCrB5-2
1.7182
Manganese-chromium-boron steel for direct hardening and hot stamping. Boron addition (0.0008-0.005%) dramatically improves hardenability at low cost. The standard grade for automotive press-hardened body-in-white components (B-pillar, side impact beams, bumper reinforcements).
| 22MnB5 | 27MnCrB5-2 | |
|---|---|---|
| Material Number | 1.5528 | 1.7182 |
| Category | Alloy Steel | Alloy Steel |
| Standard | EN 10083-3 | EN 10083-3 |
Chemical composition (wt%)
| Element | 22MnB5 | 27MnCrB5-2 | Overlap |
|---|---|---|---|
| C | 0.2–0.25% | 0.24–0.3% | Partial |
| Si | 0–0.4% | 0–0.4% | OK |
| Mn | 1.1–1.4% | 1.1–1.4% | OK |
| P | 0–0.025% | 0–0.025% | OK |
Mechanical properties
| Property | 22MnB5 | 27MnCrB5-2 | Unit |
|---|---|---|---|
| tensile_strength | 450–750 | 900–1100 | MPa |
| yield_strength | 300–600 | ≥ 700 | MPa |
| elongation | 12–18 | ≥ 12 | % |
Compatibility Assessment
22MnB5 and 27MnCrB5-2 have moderate differences (65% overlap). They are generally not direct substitutes. Consider the specific requirements of your application.
Automated assessment based on composition analysis
Frequently Asked Questions
Is 22MnB5 the same as 27MnCrB5-2?
22MnB5 and 27MnCrB5-2 have a 65% composition overlap. They are generally not directly interchangeable.
Can I replace 22MnB5 with 27MnCrB5-2?
Generally not recommended. The compositions differ significantly (65% overlap). These materials have different alloying concepts and are intended for different applications.
What is the difference between 22MnB5 and 27MnCrB5-2?
The main differences are in the following elements: C, Cr. 22MnB5 is a Alloy Steel grade, while 27MnCrB5-2 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.