| AISI W1 | |
 | |
| Category | Steel |
| Class | Tool steel |
| Type | Water-hardening tool steel |
| Designations | United States: ASTM A686 , SAE J437 (W108) , SAE J437 (W109) , SAE J437 (W112) , SAE J437 (WhO) , SAE J438 (W108) , SAE J438 (W109) , SAE J438 (W110) , SAE J438 (W112) , UNS T72301 |
| Composition | |
| |
| Element | Weight % |
| C | 0.70-1.50 |
| Mn | 0.10-0.40 |
| Si | 0.10-0.40 |
| Cr | 0.15 |
| Ni | 0.20 |
| Mo | 0.10 |
| W | 0.15 |
| V | 0.10 |
| Cu | 0.20 |
| P | 0.025 |
| S | 0.025 |
| Mechanical Properties | |
| |
| Properties | Conditions | ||
| T (°C) | Treatment | ||
| Density (×1000 kg/m3) | 7.84 | 25 | |
| Poisson's Ratio | 0.27-0.30 | 25 | |
| Elastic Modulus (GPa) | 190-210 | 25 | |
| Thermal Properties | |
| |
