O1 Tool Steel Hardness Before Heat Treat
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O1 tool steel hardness before heat treat. Heat treating o1 tool steel is simple. A2 is also an air hardening tool steel but includes less than half the chromium 4 75 5 50 and a bit less carbon 0 95 1 05 than d2. A2 tool steel hardness before heat treating raw material state likes. Minimizing warpage is another.
In short bring it to critical temperature quench it in vegetable oil then temper it in an toaster oven or regular kitchen oven for one hour at 400. A2 tool steel is a versatile air hardening tool steel that is characterized by good toughness and excellent dimensional stability in heat treatment a2 is intermediate in wear resistance between o1 oil hardening tool steel and d2 high carbon high chromium tool steel. The foil should be double crimped around the edges. Soak thoroughly and then allow to cool slowly in the furnace to below 1000ºf.
Because o1 became a very popular tool steel it is relatively difficult to determine who used it in knives first. A2 tool steel properties. A2 tool steel is an air hardening cold work chromium alloy die steel that is preferable to o1 tool steel in applications requiring greater size stability machinability and safer hardening. The tool may then be finish machined before hardening.
History of o1 steel in knives. Heat slowly and if possible pre heat at 300 500 degrees centigrade before raising to the hardening temperature of 780 820 degrees centigrade. Be careful to not tear or puncture the wrap. Stress relieving when heavy machining cuts are employed the resultant stresses may be relieved by heating the material to 1200 1250 f for one hour and cooling in still air.
It has been popular with both forging bladesmiths and stock removal knifemakers due to its wide availability in a range of sizes and ease in forging and heat treating. O1 is a general purpose tool steel that is typically used in applications where alloy steels cannot provide sufficient hardness strength and wear resistance. Where greater dimensional stability in heat treatment or improved wear resistance is required tool steels with higher alloy contents such as a2 or d2 should be considered. O1 oil hardening tool steel annealing heat slowly and uniformly to 1140 f.
10 09 2019 10 58 am 1. A2 tool steel hardness before heat treating raw material state thread tools. Like d2 it is incredibly resistant to distortion during heat treating and is moderately machinable and grindable. View profile view forum posts.
Soak thoroughly allowing 30 minutes per inch of ruling section before quenching. The road to success is to evenly heat the metal. Hardening steel is the easy part. The wear resistance properties and cost place a2 between that of o1 and d2 tool steel making it a good all purpose grade for many applications.
Once wrapped place in the furnace and heat to 1450f.