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Date: 07/27/03 at 10:21 AM
Posted by: Aguinaldo Gonsalez
E-mail: gui.pg@ig.com.br

In Reply to: NiHard 4 posted by Ramin_Pejman on 01/18/02 at 1:22 PM:

Usually nihard 4 has hardness as cast.
If necesary more hardness you need to remove the alloys in solution in the matriz.
Heat at 800 C slowly 75 a 80 C
maintenance 1 hr more 1 hr for each 25 mm
cool slow until 500 C
Stress relieve 250 a 350 C

You need more information contact me

sorry my english is not good

Aguinaldo gonsalez

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