Ribbed steel bars are cold-rolled and threaded steel bars are hot-rolled. Ribbed steel bars have high strength but poor plasticity. However, the yield strength of steel bars is low and the plasticity is good, and there is little difference between their ultimate tensile strength and compressive strength. Ribbed steel bars have high strength, and threaded steel bars have good plasticity and toughness. Compared with threaded steel bars, ribbed steel bars have smoother surfaces and better mechanical properties. Because the surface treatment of ribbed steel bars is not covered with oxide scale, it is easy to rust, so attention should be paid to preservation and maintenance.

Cold-rolled ribbed steel bars are two or three crescent-shaped steel bars formed by cold-rolling hot-rolled wire rods for multiple times and pressing ribs once to eliminate internal stress.

Cold-rolled ribbed steel bar is an updated product of cold-drawn low-carbon steel wire in prestressed concrete members. In the cast-in-place concrete structure, I-grade steel bars can be used instead to save steel, which is a better kind of cold-worked steel of the same kind.