? A-2 Ground Flat Stock is made from fine grain, electric furnace air-hardening, 5 chrome tool steel. ? It is a superior quality steel which has excellent wear and abrasion resistance properties. ? A?2 is furnished with a fully spheroidized structure and is 100 free of decarb and other surface imperfections. ? A?2 s low sulphur content makes it non-freemachining. ? HEAT TREATMENT: Preheat thoroughly at 1450?F, then raise to hardening temperature 1725? 1800?F and soak uniformly. ? For larger sections, use high side; for thin or smaller sections, use low side. ? Quench in still air or dry air blast at 125? 175?F, then TEMPER IMMEDIATELY.