International Mold Steel NAK-HH Precipitation Hardened Mold Steel

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International Mold Steel NAK-HH Precipitation Hardened Mold Steel (discontinued **)
Categories:	Metal; Ferrous Metal; Tool Steel; Mold Steel
Material Notes:	Description: NAK-HH is a precipitation, or age hardened mold steel with a through hardness of approximately 45/48 HRC. NAK-HH is ideal for use in plastic, composite and rubber molds where impact resistance is not critical. It is vacuum-arc re-melted steel with uniform grain structure, uniform hardness and excellent dimensional stability. Unique Characteristics: Vacuum-arc re-melt manufacturing process. 45 HRC hardness. Uniform hardness throughout, even in heavy sections. Uniform grain structure with no pinholes, inclusions or hard spots. Machines up to 30% faster than 30 HRC P20 mold steels. Never needs stress relieving, even after heavy machining. Information provided by International Mold Steel.
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Mechanical Properties	Metric	English	Comments

Hardness, Rockwell C	45	45
Tensile Strength, Ultimate	1359 MPa	197100 psi	Transverse
	1385 MPa	200900 psi	Longitudinal
Tensile Strength, Yield	1009 MPa @Strain 0.2 %	146300 psi @Strain 0.2 %	Transverse
	1031 MPa @Strain 0.2 %	149500 psi @Strain 0.2 %	Longitudinal
Elongation at Break	4.0 %	4.0 %	Transverse
	11 %	11 %	Longitudinal
Reduction of Area	6.0 %	6.0 %	Transverse
	22 %	22 %	Longitudinal
Charpy Impact, Notched	11.0 J/cm²	52.4 ft-lb/in²	U-notch, Transverse
	16.0 J/cm²	76.1 ft-lb/in²	U-notch, Longitudinal

**
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NIMS02 / 17381

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