CSA G30.18:21 PDF Download

CSA G30.18:21 is a standard that specifies the requirements for deformed and plain round steel bars used for reinforcing concrete. The standard applies to bars that can be provided in cut lengths or in coils.

The standard covers two types of bars. Type R bars are intended for general applications, with the "R" designation used for specification and ordering purposes. Type W bars are suitable for applications where restrictions in chemical composition and mechanical properties are desired. These bars provide enhanced ductility and weldability, with the "W" designation rolled onto the surface of deformed bars.

CSA G30.18:21 specifies three minimum yield strength levels: 400 MPa (Grades 400R and 400W), 500 MPa (Grade 500W), and 600 MPa (Grade 600W). The standard also includes limits to the chemical composition and carbon equivalent of Type W bars to enhance their weldability.

For welding applications, the standard recommends using a suitable procedure that takes into account factors such as the chemical composition, metallurgical structure, method of manufacture, and intended use of the bars. CSA W186 provides guidance on the proper designs, selection of filler metals, and performance and procedure qualification requirements for welding applications.