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This document specifies the chemical composition and mechanical properties of carbon steel and carbon manganese steel plate, sheet and strip (hereinafter referred to as “steel plate and sheet”). It is applicable to steels conforming to Australian Standard AS 1449/1.5-1991 (Table 1).
Table 1 shows the chemical composition of the steel plates and sheets specified in this document. It also provides for the maximum tolerance on each of the elements as well as the maximum deviation of the total mass from its target weight. The maximum allowable levels of certain elements are shown clearly in the table.
The mechanical properties of the steel plates and sheets are provided in Table 2. Given in the table are the yield strength, tensile strength, elongation, and reduction of area at rupture (Brinell hardness). Those values should be determined in accordance with the test methods relating to the ASTM standard C B-0-0-T.
The yield strength of the steels must be specified as provided in Table 1. For steel plates and sheets with yield strength higher than 950 MPa, the strength must be tested to determine the ultimate tensile strength and elongation. Tests must be carried out at an angle of 2° to the rolling direction of the material, in order to simulate the rolling conditions in which the material was produced.
This document also covers requirements for the surface of the steel plates and sheets. The surface of the plates and sheets must be flat, even and free of defects. It should also be protected against any corrosive substances, dirt or dust which may affect its quality. The edges should be square and free from burrs.
The steel plates and sheets must also meet the requirements of a specific product quality. The quality of each product must be confirmed by inspections carried out during and after production, and also by tests such as mechanical tests and chemical analyses. All quality requirements should be in accordance with the applicable standards of the relevant authority for the area in which the product is sold.
In addition, the steel plates and sheets must be free from defects caused by rust and other external factors. Any coatings used for protection should not peel off or become detached from the underlying steel plates or sheets.
Finally, the manufacturer must provide a test certificate which confirms the compliance of the steel plates and sheets with this document in terms of chemical composition, mechanical strength and other quality requirements. Such certificates must also include the details of the test methods applied, such as the method of sampling, test data and the results of tests carried out.
