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Ensinger PEI

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International Mold Steel NAK80 Precipitation Hardened Mold Steel
Categories: Metal; Ferrous Metal; Tool Steel; Mold Steel

Material Notes: Description: NAK80 is a precipitation or age-hardened mold steel with a uniform through hardness of approximately 40 HRc. It is super clean, Vacuum-Arc Remelted steel with uniform grain structure, uniform hardness, and excellent dimensional stability.

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.

Applications:

  • Clear lens molds
  • Extremely critical diamond finish applications
  • Molds requiring special EDM finish

Information provided by International Mold Steel.

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Mechanical PropertiesOriginal ValueComments
Hardness, Rockwell C 40
Tensile Strength, Ultimate 183400 psi
Tensile Strength, Yield 147600 psi
@Strain 0.2 %
Elongation at Break 16.1 %Elongation in 2" (longitudinal)
Reduction of Area 41.9 %
Modulus of Elasticity 30000 ksi
@Temperature 23.0 °C
Charpy Impact 8.10 ft-lbV-Notch, Longitudinal
 8.50 ft-lbV-Notch, Transverse
 
Electrical PropertiesOriginal ValueComments
Magnetic Permeability <= 380
Magnetic Coercive Force, Hc 14 Oe
Magnetic Saturation Flux Density, Bmax 16360 GaussSaturate Magnetism
Magnetic Remanence, Br 8500 GaussResidual Magnetism
 
Thermal PropertiesOriginal ValueComments
CTE, linear 6.30 µin/in-°F
@Temperature 20.0 - 100 °C
 7.00 µin/in-°F
@Temperature 20.0 - 200 °C
 7.50 µin/in-°F
@Temperature 20.0 - 300 °C
Thermal Conductivity 286.8 BTU-in/hr-ft²-°F
@Temperature 93.3 °C
 292.8 BTU-in/hr-ft²-°F
@Temperature 204 °C
 
Component Elements PropertiesOriginal ValueComments
Aluminum, Al 1.0 %
Carbon, C 0.15 %
Copper, Cu 1.0 %
Iron, Fe 93.05 %
Manganese, Mn 1.5 %
Nickel, Ni 3.0 %
Silicon, Si 0.30 %

Some of the values displayed above may have been converted from their original units and/or rounded in order to display the information in a consistent format. Users requiring more precise data for scientific or engineering calculations can click on the property value to see the original value as well as raw conversions to equivalent units. We advise that you only use the original value or one of its raw conversions in your calculations to minimize rounding error. We also ask that you refer to MatWeb's terms of use regarding this information. Click here to go back to viewing the property data in MatWeb's normal format.

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NIMS01 / 17380

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