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- Oct 18, 2001
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- 20,978
Here's what Crucible says about their A2:
(emphasis added)Airkool (AISI A2) is an air-hardening medium alloy tool steel
which is heat treatable to HRC 60-62. It has wear resistance
intermediate between the oil hardening tool steels (O1) and
the high carbon chromium tool steels (D2). Because it offers
a combination of good toughness along with moderate
wear resistance, it has been widely used for many years in
variety of cold work applications which require fairly high
abrasion resistance but where the higher carbon/ high
chromium steels are prone to chipping and cracking.
Airkool is quite easily machined in the annealed condition
and, like other air-hardening tool steels, exhibits minimal
distortion on hardening....