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NAK80 Steel Properties

 Equivalent NAK80

Product  : NAK80 Plastic Mould Steel
Kategori : Precipitation Hardening Steel
Standard: JIS
Grades   : NAK80

AISI P21, GB/T 10Ni3MnCuAl, ASTM A681

  • High precision, high mirror & surface polish
  • Super clean, Vacuum-Arc Remelted steel with uniform grain structure
  • Age-hardened for uniformity of hardness throughout, even in heavy sections.
  • Uniform microstructure & hardness approximately 40 HRC
  • Excellent dimensional stability
  • 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, etc
NAK80 steel is a precipitation or age-hardened mold steel with a uniform through hardness of approximately 40 HRC. NAK80 tool steel is the improved steel grade of NAK55, on mirror surface, EDM surface and toughness.

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Chemical Composition NAK80, 10Ni3MnCuAl & P21 Mold Steel
Grade C Si Mn Ni Cu Mo Al
NAK80 0.15 0.30 1.50 3.00 1.00 0.30 1.00
10Ni3MnCuAl 0.06-0.16 0.40 1.4-1.7 2.7-3.3 0.8-1.2 0.2-0.5 0.7-1.2
P21 0.18-0.22 0.2-0.4 0.2-0.4 3.90-4.25 0.2-0.3 0.15-0.25 1.05-1.25

Mechanical Properties
Tensile Strength (Psi) 183,400
Yield Strength (Psi) 147,600
Elongation in 2" (%) 16.1
Hardness (HRc) 40
Reduction of Area (%) 41.9
Charpy V-notch Impact Strength (toughness):
Longitudinal (ft/lb) 8.1
Transverse (ft/lb) 8.5

Physical Properties
Density (×1000 kg/m3) 7.72
Modulus of elasticity (Psi) 30.0 x 10-6
Thermal conductivity (100oC) [W/m.K] 41.3
Maximum Magnetic Permeability 380
Saturated Magnetism (Gauss) 16,360
Residual Magnetism (Gauss) 8,500
Coercive force (Oersted) 14.0

Plastic molds, High-mirror polish mold, Precision long run mold, rubber molds, jigs & fixtures, and press dies. etc


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