May 26, 201115 yr I just spotted this. I'm curious, what's perilous about quenching A-36 as opposed to other types of steel? A-36 is a structural specification. That means it has to mean certain requirements for strength and may be of any composition that meets that requirement. Since it can have varying amounts of alloying elements it is impossible to tell how it will react in a quench (or even how two different spots on the same piece will react as it often has a lot of recycled steel in it). So one piece may just cool down like mild steel while the next piece breaks. ron
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