sfDuck Posted October 16, 2009 Share Posted October 16, 2009 I have a shaft from an auto transmission which I forged into a raising hammer and was wondering what colour to draw it to? (4140 steel) Thanks! Quote Link to comment Share on other sites More sharing options...
David Einhorn Posted October 16, 2009 Share Posted October 16, 2009 You might try:Houghtonhttp://www.iforgeiron.com/forum/f11/axles-what-metal-4622/ Quote Link to comment Share on other sites More sharing options...
rthibeau Posted October 17, 2009 Share Posted October 17, 2009 I'd wait 'til purple just creeps to the edge of the face then fully quench. Quote Link to comment Share on other sites More sharing options...
Frank Turley Posted November 13, 2009 Share Posted November 13, 2009 How about before drawing? Normalize at 1600-1700F. Anneal 1500-1550F. Harden in oil, 1525-1575F. Quote Link to comment Share on other sites More sharing options...
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