BM 380
Special ultra-hard alloy (36–40 HRC) with compressive strength up to 1,579 MPa for precision stamping dies and deep-drawing tooling.
Chemical composition
| Copper | Remainder |
|---|---|
| Aluminum | 14.0–16.0% |
| Iron | 4.5–6.5% |
| Cobalt | 2.0–3.0% |
| Manganese | 2.0–2.5% |
Mechanical properties
| Tensile strength | 600–750 MPa |
|---|---|
| Yield strength | 500–600 MPa |
| Elongation | 0.0–0.2 % |
| Rockwell C hardness | 36–40 |
| Compressive strength | 1351–1579 MPa |
| Density | 6.95 kg/dm³ |
Informational values. Vary by manufacturing process, geometry, and dimensions.
Formats
Typical applications
- Precision stamping and lamination dies
- Deep drawing
- Die components and punch tools
- Forming rollers
- Eliminates deformation and weld spatter on stainless and carbon steel
Manufacturing processes
- Extrusion
- Forging
Aluminum bronze alloys
- BM 863
High-strength copper-zinc-aluminum-manganese alloy balancing hardness, ductility, and corrosion resistance for critical mechanical components.
- BM 954
Aluminum-iron bronze with excellent balance between fatigue resistance, wear, and ductility — the family reference for structural parts and molds.
- BM 300
High-aluminum bronze (12.5–13.5%) with very high compressive strength, designed for guide bushings, wear plates, and operations without continuous lubrication.
- BM 959
BM 300 variant tuned for tube-forming, bending rollers, and similar non-impact operations.
- BM 340
Duplex-structure alloy (13.5–14% Al) with 1,230–1,351 MPa compressive strength, optimized for forming mandrels and drawing tools.