What is DDS type C Steel? The American Standard for hot dip Galvanized Cold Rolled Materials A 653/A 653M-05 identifies deep drawing aluminum killed quality galvanized cold rolled hot dip galvanized steels with designations: DDS type C steel. DDS stands for ‘deep drawing quality steel’. Deep drawing steel DDS type C steel is more draw-able that FS type A & B steel & DDS type A steel. DDS type C steel is for sure stabilized steel whereas DDS type A depends on customer requirement of stabilization.
The Chemical Composition: DDS type C is composed of maximum 0.02 percent of Carbon, maximum 0.5 percent Manganese, maximum 0.02 to minimum 0.1 percent Phosphorous, & maximum 0.025 percent Sulphur. Remaining is Iron with other impurities. Minimum percentage of Aluminum is 0.1 percent. Zinc is coated on this composition of base steel.
The yield strength ranges from 170 to 280 MPa of the above material designation. The elongation of these materials is greater than or equal to 32 percent.