• An air hardening tool steel
  • High abrasion resistance coupled with toughness
  • The wear resistant are not as great as D2 and D3
  • When cutting edge is less lible to crumble in srvice
  • Cold forging dies and coining dies, cold heading dies
  • Shear blades
  • Cutting knives for paper,wood,fibre
  • Knurling tools
ST 52-3 Steel Round Bar

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