AS 1443:2004 Carbon and carbon-manganese steel—Cold finished bars
9.2 Sampling
When mechanical test certificates are required, test sampling shall be taken from each batch at a frequency to be agreed between purchaser and the supplier.
NOTE: As a guideline, sampling frequencies of one sample for a batch of steel up to 25 t and two samples for a batch of steel exceeding 25 t are recommended.
9.3 Location and preparation of test pieces
Test pieces shall be located and prepared as follows (see also AS 1391):
(a) Bars up to 40 mm diameter or major cross-sectional dimension shall be tested axially,either in full section or by using a proportional test piece.
(b) Bars with nominal cross-sectional dimensions greater than 40 mm shall have the axis of the test specimen parallel to the axis of the bar and as near as practicable to a point one-sixth of the distance between diagonally (or diametrically) opposite surfaces. A
proportional test piece shall be used.
(c) Rectangular bars of width greater than 40 mm and thickness not greater than 40 mm shall be tested either in full thickness or by using a proportional test piece with its axis parallel to the axis of the product, and as near as practicable to a position one quarter of the width and one half of the thickness from adjacent surfaces of the bar.
(d) Rectangular products of thickness greater than 40 mm shall be tested using a proportional test piece with its axis parallel to the axis of the product, and as near as practicable to a point one-sixth of the distance from a surface of the bar between opposite surfaces.
9.5 Retesting
Should any tensile test piece first selected fail to comply with the requirements of Clause 6.2, one or more of the following procedures shall be adopted:
(a) For each failed test select two further test samples and test them in accordance with Clause 9. Should the test results from these samples comply with the requirements of Clause 6.2, the steel is deemed to comply with this Standard.
(b) Select test samples from each bar or coil and test in accordance with Clause 9. The steel is deemed to comply with this Standard if all test results comply with the requirements of Clause 6.2.
(c) Reprocess the unit, which failed, and repeat the tests in accordance with Clause 9. The unit is deemed to comply with Clause 6.2.