NAK80 Plastic Mold Steel

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Product Description

NAK80 Plastic Mould Steel

Equivalent grades: 15Ni3Mn/HPM50/GEST80/P21

NAK80 is a 40 HRC pre-Hardened, high performance, high precision, mold steel. Applications include plastic molds, rubber molds, jigs & fixtures, and press dies.

  • Machines up to 20 percent faster than 30 HRc P20
  • Pre-hardened to 38-42 HRC
  • Uniform microstructure & hardness (40 HRC between surface & interior)
  • Never needs stress relieving, even after heavy machining
  • Highly weldable, HAZ gets softer not harder (re-age harden to bring back to 40 HRC)
  • EDM layer is easy to remove
Unique Characteristics:
  • Super clean, Vacuum-Arc Remelt manufacturing process.
  • 40 HRc hardness.
  • Age-hardened for uniformity of hardness throughout, even in heavy sections.
  • When welded, NAK leaves no witness lines after re-aging.
  • Uniform grain structure with no pin holes, inclusions or hard spots.
  • Machines up to 20% faster than 30 HRc P20 mold steels.
  • Never needs stress relieving, even after heavy machining.
  • Polishes to a superior No. 1 finish, even over welded areas.
  • Welding
     As a result of low carbon content, age hardening, and the availability of NAK weld rod, hardness is lowered in the heat-affected zone during the welding process, NAK 80 can be re-aged to 40 HRc with no distortion or stress put into the mold. Polish, texture and wear in welded area are indistinguishable from adjoining “parent steel” on the finished product.
  • Machining
     Machines to a superior surface with negligible dimensional change up to 20% faster than P20. Positive rake cutters with concave, chip breaking inserts work best, and last up to twice as long as P20 mold steels.
  • EDM
     The soft recast layer (approximately 32 HRc) is much thinner and is easier to remove than steels with a recast layer that is equivalent to their “as quenched” hardness. With NAK80, no post EDM stress relieving is ever needed.
  • Stability
     Age hardening eliminates the stresses inherent in quenched and tempered