This Standard specifies requirements for plain and deformed round steel bars for the reinforcement of concrete. Two grades, Grade 300 and Grade 430 are defined and both are weldable subject to the provisions of NZS 4702. Because of the relevance to seismic ductile design this Standard does not permit bar which obtains its strength from cold working.

Specifies chemical composition and mechanical properties for plain round and deformed bars having Lower Characteristic Strengths of 300 and 430 MPa. Dimensions are provided for 10 preferred bar sizes from 6 mm to 40 mm diameter and deformation requirements are specified. Both grades are weldable subject to the requirements of NZS 4702.

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