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Descriptions:
NAK80 steel 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. NAK80 tool steel is the improved steel grade of NAK55, on mirror surface, EDM surface and toughness.
Applications:
NAK80 steel is mainly used for plastic molds for the following:
Transparent products and others for which mirror finished surface are particularly important
Products for which electrical discharge machined surfaces are very important
Typical for clear lens molds, extremely critical diamond finish applications, and molds requiring special EDM finish.
JIS |
C |
Si |
Mn |
Ni |
Cu |
Mo |
Al |
NAK80 |
0.15 |
0.30 |
1.50 |
3.00 |
1.00 |
0.30 |
1.00 |
Heat Treatment:
Heat NAK80 steel to 640-660oC, cool slowly. This will produce a maximum Brinell hardness of 330.
Harden steel NAK80 from a temperature of 880-900oC followed by oil quenching. Hardness after quenching is 41 HRC.
Heat up to 550oC with heating speed 60oC/h, then hold 5 hours at temperature and then cool slowly in the air.7. Stability
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