BÖHLER W300 ISODISC is a 5% chromium hot‑work tool steel (1.2343 / X37CrMoV5‑1) known for its hot toughness, thermal resistance, and durability, making it a standard choice for extrusion, forging, and low‑pressure die casting, with the ISOBLOC variant offering enhanced cleanliness and toughness.
Chemical Analysis
| C | Si | Mn | Cr | Mo | V |
| 0.38 | 1.10 | 0.40 | 5.00 | 1.20 | 0.40 |