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Cold Work Tool Steel Alloy Comparison


Cold Work SteelShock SteelHot Work Tool SteelHigh Speed SteelAerospace
    Use checkboxes to select two or more alloys.
  ASTM Grade Name Description MI1 HRC   Toughness
  Wear Resistance
  Grindability
  O1  LSS™ O1  An oil hardening, non-shrinking tool steel with good toughness and moderate dimensional stability in heat treatment.  95  60 





  O6  Graph-Mo®  An oil hardening, graphitic tool steel with excellent non-seizing properties. The graphite particles provide self-lubricity and hold applied lubricants.  125  60 





  L6  LSS™ L6  An oil hardening, general purpose tool and die steel. The nickel content provides enhanced impact toughness.  75  57 





  A2  LSS™ A2  A general purpose, air hardening tool and die steel.  70  60 





    LSS™ A7 Mod.  An air hardening, highly abrasion resistant tool steel. Used in severe wear applications such as brick molds and shot-blast liners.   40  61 





  A8  LSS™ MGR™  An air hardening steel with good toughness which can be used in cold work and some limited hot work tooling applications.  75  59 





  A9  LSS™ A9  An air hardening steel with enhanced toughness which can be used in both cold work and hot work tooling applications.  70  56 





  A10  Graph-Air®  An air hardening graphitic tool steel. More dimensionally stable during heat treatment than O6 graphitic tool steel.  85  60 





  D2  LSS™ D2  A general purpose, 12% chromium, air hardening, wear resistant tool steel. Good dimensional stability during heat treatment.   50  62 





  D3  LSS™ D3  An air hardening, high carbon, 12% chromium tool steel with improved wear resistance.  45  63 





  D7  LSS™ D7  An air-hardening tool steel with maximum wear resistance for an ingot cast steel. Large, hard carbides resist wear from abrasive particles.  35  63 





    LSS™ Vertex  A versatile, air hardening die steel with a unique combination of high strength, high toughness and very good wear resistance.  65  62 





    Lescowear™ and PGK™  Two very similar air hardening tool steels with a unique combination of toughness and wear resistance.  55  60 





  S1  LSS™ S1  An oil hardening, shock resistant tool steel designed for applications involving high impact or sudden shock loading.  70  57 





  S7  LSS™ S7  An air hardening, shock resistant tool steel with better dimensional stability in heat treatment.  70  57 





  H13  LSS™ H13  A 5% chromium hot work steel which is often used in cold work tooling applications which need high toughness but not high strength.  65  48 





  H13S  Viscount 44®  Resulfurized (machinable) prehardened H13 which can be used for a variety of tooling and maintenance applications.   40  44 





  M2  Double Six™  A general-purpose, high speed steel which is sometimes used in cold work applications which require high strength but not high toughness.  50  64 





    CPM® 1V®  A powder metal tool steel with a unique combination of high toughness and high strength for both cold and hot work applications.  60  57 





  M4  CPM® Rex M4 HC  A powder metal tool steel with a unique combination of high strength, toughness and wear resistance for both cold and hot work tools.  55  63 





    CPM® 9V®  A powder metal tool steel which provides high toughness and wear resistance at a moderate strength level.   50  53 





    CPM® 10V®  A powder metal tool steel which provides extremely high wear resistance in combination with high strength and good toughness.  50  63 





Machinability Index: Relative machinability, as a percentage, compared to machining a 1% carbon tool steel.