NAK 55® is a unique pre-hardened material that is uniformly supplied at 38-42 HRC but yet is highly machinable, does not require stress relieving, and is highly weldable. NAK 55® is also one of the most stable materials on the market. It is available in Plate, Block, and Round Bar forms. NAK 55® is supplied pre-hardened at 38-42 HRC.
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