Because concrete has high compressive strength but low tensile strength, it is reinforced by embedding steel within its structure. Reinforcing steels are mainly produced in diameters from approximately 5mm to 60mm. The smaller diameters are then further processed into mats or lattices, before having concrete poured over them on site.
Typically, yield strength, ultimate tensile strength, and elongation at break are tested, but a full stress-strain curve to failure test can be provided if required.
CSI test to standard AS 1391-2007: Metallic Materials – Tensile Testing at Ambient Temperature, which is the method specified by AS/NZS 467:2001 Steel Reinforcing Materials.