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A2 Tool Steel Hardness (before heat treating, raw material state)

FrankTartaglia

Plastic
Joined
Apr 25, 2019
Hello All,
Can someone tell me what the Rc hardness range is for soft A2 tool steel (before hardening)?
I am trying to do a comparison study on materials and I am having trouble finding accurate information.
Thanks in advanced!
 
From here: https://www.hudsontoolsteel.com/technical-data/steelA2

Annealing

Annealing must be performed after hot working and before re-hardening.

Heat at a rate not exceeding 400°F per hour (222°C per hour) to 1550°F (843°C), and hold at temperature for 1 hour per inch (25.4mm) of maximum thickness; 2 hours minimum. Then cool slowly with the furnace at a rate not exceeding 50°F per hour (28°C per hour) to 1000°F (538°C). Continue cooling to ambient temperature in the furnace or in air. The resultant hardness should be a maximum of 235 HBW.

Which is roughly 22 RC from this chart: https://www.scotforge.com/Portals/0/PDF/Brinell-Hardness-Conversion-Card.pdf
 








 
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