ISO 630-1:2011 pdf free download – Structural steels – Part 1: General technical delivery conditions for hot-rolled products.
6.4 Mechanical properties
6.4.1 General
Under the inspection and testing conditions specified in Clauses 7, 8 and 9, and in the delivery condition as specified in 6.2, mechanical properties shall comply with the relevant requirements given in the individual parts of ISO 630. Agreement shall be reached, where appropriate, at the time of enquiry and order about the mechanical properties to be adhered to after additional heat treatment such as stress relief [see option 5.2 d)].
6.4.2 Impact properties
Impact properties shall comply with the requirements of the individual parts of ISO 630. If specified, the products over 12 mm in thickness shall be tested with a full-size test piece in accordance with 9.3. If agreed upon at the time of enquiry and order, sub-sized test pieces shall be used in the case of nominal product thicknesses of 6  i  12 mm. Impact tests shall not be required for nominal thickness s < 6 mm. For sections, thickness refers to the part thickness where test pieces are prepared as specified in ISO 377. 6.4.3 Through-thickness characteristics By agreement, products of the grades and qualities specified in the individual parts of ISO 630 shall comply with one of the improved deformation properties perpendicular to the surface of the product as specified in ISO 7778. 6.5 Surface condition The surface properties shall be in accordance with ISO 7788 for plates and wide flats, ISO 20723 for sections and ISO 9443 for bars. Other surface-condition standards may be used if agreed upon at the time of enquiry and order. 6.6 Internal soundness By agreement, ultrasonic requirements together with the conditions of their verification shall be specified. See 9.5. 6.7 Dimensions, tolerances on dimensions and shape, and mass 6.7.1 Dimensions, and tolerances on dimensions and shape The nominal dimensions and tolerances on dimensions for the products shall be agreed upon at the time of enquiry and order, with reference to the dimensional standards listed below: a) for hot-rolled flat products, see ISO 7452 for plates and ISO 9034 for wide flats; Where sub-sized test pieces are used (see 8.3.2.3), the minimum impact energy values given in the specific parts of ISO 630 shall be reduced in proportion to the cross-sectional area of the test piece. For product thicknesses < 6 mm, the impact test shall not be carried out. The minimum impact values given in the individual parts of ISO 630 apply for the mean of three test pieces. One individual value may be lower than the specified value, provided that it is not less than 70 % of the specified value. If the above conditions are not met, an additional set of three test pieces shall be taken from the same sample and shall be tested. In order to regard the test unit as acceptable after testing the second set, the following requirements shall be met: a) the mean value of six tests shall be greater than or equal to the specified minimum value; b) not more than two of the six individual values shall be less than the specified minimum value; c) not more than one of the six individual values shall be less than 70 % of the specified minimum value. If these requirements are not met, the sample product shall be rejected and retests shall be carried out on two new sample products among the remainder of the test unit. 9.4 Through-thickness characteristics The test methods for the through-thickness characteristics shall be given in ISO 7778. 9.5 Ultrasonic test By agreement, an ultrasonic test shall be carried out: — for flat products of thickness  6 mm in accordance with ISO 17577 or with test methods and acceptance criteria agreed upon; — for sections and bars with test methods and acceptance criteria agreed upon. 10 Marking The products shall be marked durably and readably in an accessible and visible place with the information given in Table 1. The method of marking and the material of marking shall, unless otherwise agreed, be at the manufacturer’s discretion. It is permissible to supply products in securely tied bundles. In this case, the marking shall be on a label or tag attached to the bundle.