BÖHLER W300 ISOBLOC is a 5% chromium steel and corresponds to material number 1.2343 (X37CrMoV5-1). Produced via the electroslag remelting process (ESR), this tool steel has very high hot toughness as well as good hot hardness and very good resistance against heat-checkings. The combination of these properties makes it a top performer in high- and low-pressure die casting as well as in closed-die and open-die forging. In addition, this material has very good polishability and is therefore also often used as a molding material for plastic injection molds.
| High temperture strength | High temperature toughness | High_ temperature wear resistance | Machinability supplied |
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| SEL | EN | UNS | AISI | JIS | NADCA |
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| 1.2343 | X37CrMoV5-1 | T20811 | H11 | SKD6 | D1830 |
| EN ISO | JIS | NADCA |
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| 4957 | G4404 | #207 |
| C | Si | Mn | Cr | Mo | V | |
|---|---|---|---|---|---|---|
| 0.38 | 0.90 | 0.40 | 5.20 | 1.30 | 0.45 |
