Products: KAPSTAR Mold Steel

KAPSTAR Mold Steel

  • KAPSTAR is a precipitation hardening mold steel ideal for plastic injection and rubber compression molds.
  • KAPSTAR is supplied at approximately 40 Rc. Additional heat treating is not required however, if a higher hardness is required, the material can achieve a higher hardness through nitride processing.
  • KAPSTAR can be machined and polished and enter production immediately. KAPSTAR can provide as much as three times greater in-service tool life than P-20. It is through-hardened steel that exhibits uniform hardness through thick and thin sections.
  • KAPSTAR at 40 Rc machines up to 50% faster than P-20 at 30 Rc.
  • KAPSTAR is sold in the precipitation/age hardened condition. Typical hardness is BHN 344/371 Rc 37/42.
  • KAPSTAR maximum working hardness is BHN 344/371 Rc 42 (as supplied).

Typical Applications

  • Plastic Injection Molds
  • Composite Molds
  • Pressure Plates
  • Rubber Molds
  • Blow Molds

Chemical Composition (Typical)

  • Carbon: 0.12%
  • Silicon: 0.40%
  • Manganese: 1.50%
  • Chromium: 0.50%
  • Molybdenum: 0.25%
  • Vanadium: 0.10%