ASTM A105 Carbon Steel Slip On Flanges are made of low-carbon steel with low levels of manganese and silicon. The flanges can be forged at temperatures ranging from 2200 to 1700 F and then quenched, tempered, or normalized. No heat treatment is required except for carbon steel forging. Carbon Steel ASTM A105 Flanges should undergo a quick cooling process following heat treatment in water or air, which is suitable for both solution annealing and stress relief.