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

±0.01 mm

Category

Tool Steel

Material Properties

PropertyValue
Tensile Strength1,517 MPa (220 ksi)
Yield Strength1,310 MPa (190 ksi)
Hardness54-58 HRC
Density7.83 g/cm³
Machinability Rating42/100
Thermal Conductivity30.0 W/m·K
Melting Point1,425 °C
Tolerance±0.01 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

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