Use of Products: G10B21-C is a commen steel grade used for produce the parts of underpan and Interiors of automotive. uniform-chemical composition, low harmful elements, high purity, low decarburisation, good surface quality, good cold heading perfomence, low crack ratio ,wire rod have low hardness ,after annealing have good strength and hardenability. The series products of 10B21 (ordinary,XG,G and Q quality) is our advantage products ,it is famous in the domestic and all over the world.