BS 10263-1:2017 pdf download – Steel rod, bars and wire for cold heading and cold extrusion Part 1: General technical delivery conditions 7.7Hardenability requirements 7.7.1 General Products cannot be ordered and supplied according to both end quench test hardenability requirementsand core hardening requirements 7.7.2 End quench (Jominy test) hardenability requirements In cases where a product is ordered with reference to a steel grade the designation of which is quotedin Tables 8 and 9 of EN 10263-3:2017 or in Tables 9 to 11 of EN 10263-4:2017, the product shall meet thehardenability requirements indicated in those tables.For the verification, see 10.2.1. 7.7.3 Core hardening requirements ln cases where a product is ordered with reference to a steel grade the designation of which is quotedin Table 12 of EN 10263-4:2017, core hardening properties shall meet the requirements indicated in therelevant tables. At least 90 % of the structure shall be martensite. In cases of dispute regarding supplies of products with diameters larger than those quoted in Table 12of EN 10263-4:2017, samples to be tested shall be brought to the corresponding dimensions indicated inthat table by hot working or forging, taking into account the requirements of EN ISO 642. 7.7.4 Hardenability by calculation See 10.2. 7.8Microstructure 7.8.1 Austenitic grain size Steels of EN 10263-3:2017 and of EN 10263-4:2017 shall show a fine grain structure with an austeniticgrain size of 5 or finer, when tested in accordance with EN ISO 643.For verification, see A.3. Concerning steels of EN 10263-2:2017 and EN 10263-5:2017, unless otherwise specified at the time ofenquiry and order, the choice of the austenitic grain size is left to the manufacturer’s discretion. 7.8.2Carbide spheroidization For steels covered by Parts 2, 3 and 4 of this European Standard, in cases where carbide spheroidizationis requested reference shall be made to A.4. 7.8.3 Non-metallic inclusions The steels of EN 10263-3:2017 and EN 10263-4:2017 shall have a certain degree of cleanness, howeververification of the non-metallic inclusion content requires a special agreement at the time of enquiryand order (see A.5). 7.9Internal soundness 7.9.1 Rod, bars and wire shall be free from internal defects which may cause an adverse effect on theproduct during cold heading or cold extrusion or during heat treatment. 7.9.2 Requirements concerning internal soundness can be agreed at the time of enquiry and order, e.g.with reference to non-destructive tests (see A.6). 7.10 Surface quality 7.10.1 General The surface quality requirements for steels of Parts 2, 3...
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