BS 4659 BH21 Steel — Specifications & Listings
BS 4659
British tungsten hot work tool steel
Grade Details
| Grade | BS 4659 BH21 |
| Standard | BS 4659 |
| Description | British tungsten hot work tool steel |
| Applications | Hot extrusion dies, brass/bronze forging dies |
Equivalent / Similar Grades
Chemical Composition (%)
| C |
Mn |
Cr |
W |
V |
| 0.26–0.36 |
0.15–0.40 |
3.00–3.75 |
8.50–10.00 |
0.30–0.60 |
Mechanical Properties
| Hardness HRC (hardened) |
36–54 |
| Hardness HB (annealed) |
≤229 |
Typical Available Sizes
| Round Bar |
16mm–300mm dia |
| Flat Bar |
20×10mm–300×100mm |
Sizes are indicative. Contact seller for exact availability.
Active BS 4659 BH21 Listings on M-EX