38MnB5
1.5531Boron press-hardening steel — higher C (0.36-0.42%) than 22MnB5 (0.20-0.25%) for higher final strength (UTS ~1800 MPa vs ~1500 for 22MnB5). Used for ultra-high-strength automotive structural parts where 22MnB5 is not strong enough: A/B-pillar reinforcements, bumper beams, door intrusion beams. Hot-stamped at 880-950°C then die-quenched to full martensite.
International equivalents
| Flag | Standard | Country | Grade | Number | Match |
|---|---|---|---|---|---|
| 🇪🇺 | EN | Europe | 38MnB5 / 1.5531 | 1.5531 | 100% |
Sources: EN 10083-3
Mechanical properties — Pro
Press Hardened
| Property | Value | Unit |
|---|---|---|
| Tensile Strength | ||
| Yield Strength | ||
| Elongation | ||
| Hardness HRC | ||
| Elastic Modulus | ||
| Density |
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