22MnB5
1.5528THE 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.
International equivalents
| Flag | Standard | Country | Grade | Number | Match |
|---|---|---|---|---|---|
| 🇪🇺 | EN | Europe | 22MnB5 / 1.5528 | 1.5528 | 100% |
| 🇩🇪 | VDA | Germany | CR1100T-MB (VDA 239-500) | — | 95% |
Sources: EN 10083-3, VDA 239-500
Mechanical properties — Pro
As Delivered
| Property | Value | Unit |
|---|---|---|
| Tensile Strength | ||
| Yield Strength | ||
| Elongation | ||
| Density |
Press Hardened
| Property | Value | Unit |
|---|---|---|
| Tensile Strength | ||
| Yield Strength | ||
| Elongation | ||
| Hardness HRC |
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