Tool Steel S7
Tool Steel S7 is a shock-resistant tool steel with the highest toughness of any tool steel grade. It can withstand repeated impact loading without cracking and is commonly used for cold and hot work applications requiring maximum impact resistance.
Machinability
42/100
Tolerance
±0.02 mm
Category
Tool Steel
Material Properties
| Property | Value |
|---|---|
| Tensile Strength | 1,517 MPa (220 ksi) |
| Yield Strength | 1,310 MPa (190 ksi) |
| Hardness | 54-58 HRC |
| Density | 7.83 g/cm³ |
| Machinability Rating | 42/100 |
| Thermal Conductivity | 30.0 W/m·K |
| Melting Point | 1,425 °C |
| Tolerance | ±0.02 mm |
Common Grades
S7AISI S7
Advantages
- Highest toughness of tool steels
- Excellent shock resistance
- Good hot hardness
- Versatile (hot and cold work)
Limitations
- Lower wear resistance than D2/A2
- Expensive
- Sensitive to decarburization
Common Applications
Chisels
Punches
Shear blades
Injection mold cavities
Gripper jaws
Impact tools
Industries Served
Tooling & Die MakingPlastics MoldingIndustrial Machinery
Available Surface Finishes
Black OxideNitridePolished