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+1 The simplest explanation should always rise to the top.

No problem. If someone was confused about 200 Centigrade that's enough to reduce hardness in some steels. Here's where I go for a quick look when I'm away from my hardcover books on heat treatment....

I'm here. Charlie's right, drawing the temper back too far will require temperature, usually above 400F, but the exact temperature will depend entirely on the steel. If we're talking about an...