Certified mill test reports typically accompany each shipment of reinforcing bars. The mill reports certify that the reinforcing bar conforms to the project specifications and reveals the chemical composition of the reinforcing bar.

Generally, reinforcing steel bars are either carbon-steel (conforming to ASTM A615) or low-alloy steel (conforming to ASTM A706).

 

Reinforcing bars typically come in two primary grades: Grade 60, which has a minimum yield strength of 60,000 psi, and Grade 40, which has a yield strength of 75,000 psi. The metric equivalents for these are Grade 420, which has an equivalent yield strength of 420 MPa (megapascals) and Grade 520, which has an equivalent yield strength of 520 MPa.

Steel Reinforcing Bars: Embedded "Stength" of Cast-in-Place Reinforced Concrete.

Mill Test Reports