| PDF Pages<\/th>\n | PDF Title<\/th>\n<\/tr>\n | ||||||
|---|---|---|---|---|---|---|---|
| 1<\/td>\n | BRITISH STANDARD BS EN 10087:1999 Free cutting steels – Technical delivery conditions for semi-finished products, hot-rolled bars and rods <\/td>\n<\/tr>\n | ||||||
| 2<\/td>\n | This British Standard was published under the authority of the Standards Policy and Strategy Committee on 15 January 1999 National foreword <\/td>\n<\/tr>\n | ||||||
| 3<\/td>\n | Contents <\/td>\n<\/tr>\n | ||||||
| 5<\/td>\n | EUROPEAN STANDARD NORME EUROP\u00c9ENNE EUROP\u00c4ISCHE NORM EN 10087 Descriptors: Iron and steel products, hot-rolled products, metal bars, wire rod, free machining steels, grades, quality, chemical position, mechanical properties, heat treatment, delivery condition, surface defects, inspection, tests English version Free-cutting steels – Technical delivery conditions for semi-finished products, hot-rolled bars and rods <\/td>\n<\/tr>\n | ||||||
| 7<\/td>\n | 1 Scope 1.1 This European Standard gives the technical delivery conditions for 1.2 In special cases, variations in these technical delivery conditions or additions to them may form the subject of an agreement at the time of enquiry and order (see Annex B). 1.3 In addition to the specifications of this European Standard, the general technical delivery conditions specified in EN 10021 are applicable unless otherwise specified below. 2 Normative references 3 Definitions 3.1 free-cutting steels 4 Classification and designation 4.1 Classification 4.2 Designation 4.2.1 Steel names 4.2.2 Steel numbers 5 Information to be supplied by the purchaser 5.1 Mandatory information a) the quantity to be delivered; b) the designation of the product form (e.g. round or square); c) the number of the dimensional standard (see Annex D); <\/td>\n<\/tr>\n | ||||||
| 8<\/td>\n | d) the dimensions and tolerances on dimensions and shape and, if applicable, letters denoting relevant special tolerances; e) the number of this European Standard (EN 10087); f) steel name or steel number (see 4.2); g) the standard designation for a test report (2.2) or, if required, any other type of inspection document in accordance with EN 10204 (see 8.1). 5.2 Options a) any special requirement on treatment condition at delivery (see 6.2); b) any special requirement on grain size (see 7.3 and B.2); c) any requirement for internal soundness (see 7.4 and B.3); d) any requirement relating to surface quality (see 7.5.3); e) any requirement concerning suitability of bars and for bright drawing (see 7.5.4); f) any requirement relating to removal of surface defects (see 7.5.5); g) any requirement concerning special marking of the products (see clause 9 and B.5); h) any special requirement concerning verification of the mechanical properties in the quenched and tempered condition on a reference test piece (see 8.2.1.1 e) and B.1); i) any verification of the product analysis (see 8.2.1.1 f), Table 8 and B.4). 6 Manufacturing process 6.1 General 6.2 Treatment condition at delivery 6.3 Cast separation 7 Requirements 7.1 Chemical composition and mechanical properties 7.2 Weldability 7.3 Structure 7.4 Internal soundness 7.5 Surface quality 7.5.1 All products shall have a surface finish appropriate to the forming processes applied. 7.5.2 Minor surface imperfections which may occur also under normal manufacturing conditions, such as scores originating from rolled-in scale in the case of hot-rolled products, shall not be regarded as defects. 7.5.3 Where appropriate, requirements relating to the surface quality of the products shall be agreed on at the time of enquiry and order with reference to EN 10221. 7.5.4 If suitability of bars and rod for bright drawing is required, this shall be agreed at the time of enquiry and order. <\/td>\n<\/tr>\n | ||||||
| 9<\/td>\n | 7.5.5 The repair of surface defects by welding is not permitted. 7.6 Dimensions, tolerances on dimensions and shape 8 Inspection and testing 8.1 Types and contents of inspection documents 8.1.1 Products complying with this European Standard shall be ordered and delivered with one of the inspection documents as spec… 8.1.2 If, in accordance with 8.1.1, a test report is to be issued, it shall contain the following information: a) the confirmation that the material complies with the requirements of the order; b) the results of the cast analysis for all the elements specified in Table 1 for the steel grade concerned. 8.1.3 If, in accordance with the agreements at the time of enquiry and order, an inspection certificate or inspection report is … a) the manufacturer\u2019s results for the cast analysis of all elements specified in Table 1 for the steel grade concerned; b) the results of inspections and tests ordered as a result of supplementary or special requirements (see Annex B); c) the symbol letters or numbers relating the inspection documents, test pieces and products to each other. 8.2 Specific inspection and testing 8.2.1 Chemical composition and mechanical properties 8.2.1.1 Where specific inspection and testing is specified (see 8.1.3) the properties of the product in the untreated or quenched and tempered condition shall be verified as follows: a) for steels not intended for heat treatment, tensile strength in accordance with Table 3; b) for steels intended for case hardening, tensile strength in accordance with Table 4; c) for steels intended for quenching and tempering, tensile strength in the untreated condition in accordance with Table 5; d) for steels according to Table 5 delivered in the quenched and tempered condition, the mechanical properties in accordance with Table 5; e) where specified at the time of enquiry and order, the mechanical properties of steels intended for quenching and tempering shall be verified by the testing of a reference test piece in accordance with B.1; f) where specified at the time of enquiry and order, the product analysis shall be verified in accordance with B.4. 8.2.1.2 The frequency of testing, sampling conditions and the test methods to be applied for verification of the requirements shall be as given in Table 8. 8.2.2 Visual and dimensional inspection 8.2.3 Retests 9 Marking <\/td>\n<\/tr>\n | ||||||
| 10<\/td>\n | Table 1 – Types of steel, chemical composition (applicable to cast analysis)a a Elements not quoted in this Table shall not be intentionally added to the steel without the agreement of the purchaser, other … b If, by metallurgical techniques, the formation of special oxides is guaranteed, a Si-content of 0,10 % to 0,40 % can be agreed. Table 2 – Permissible deviations between specified analysis and product analysis a \u00b1 means that in one cast the deviation may occur over the upper value or under the lower value of the specified range in Table 1, but not both at the same time. <\/td>\n<\/tr>\n | ||||||
| 11<\/td>\n | Table 3 – Hardness and tensile strength in the untreated condition of free-cutting steels not intended for heat-treatment a In cases of dispute, the tensile strength values are deciding. b The hardness values are given for information only. c For flats, a minimum tensile strength of 340 N\/mm2 applies. Table 4 – Hardness and tensile strength of case hardening free-cutting steels in the untreated condition a In cases of dispute, the tensile strength values are deciding. b The hardness values are given for information only. <\/td>\n<\/tr>\n | ||||||
| 12<\/td>\n | Table 5 – Mechanical properties of direct-hardening free-cutting steelsa a Re = yield strength (0,2 % proof stress); b In cases of dispute, the tensile strength values are deciding. c The hardness values are given for information only. <\/td>\n<\/tr>\n | ||||||
| 13<\/td>\n | Table 6 – Conditions for heat treatment of case-hardening free-cutting steelsa a The temperatures given for carburizing, core-hardening, case hardening and tempering are for guidance; the actual temperatures chosen should be those that will give the properties required. b The carburizing temperature will depend on the chemical composition of the steel, the mass of the product, and the carburizing… c When applying the single quench method, the steel is to be quenched from the carburizing temperature or a lower temperature. The lower hardening temperatures are in each case to be preferred, in particular when there is risk of distortion. d The kind of quenching agent depends on, for example, the shape of the products, the cooling conditions and the amount of furnace filling. e Time for tempering as a guide: 1 h minimum. Table 7 – Conditions for heat treating of direct-hardening free-cutting steelsa a The temperatures are for guidance, but the actual temperatures chosen shall be those that will give the properties required. b Time for austenitizing as a guide: 0,5 h minimum. c Time for tempering as a guide: 1 h minimum. <\/td>\n<\/tr>\n | ||||||
| 14<\/td>\n | Table 8 – Test conditions for verification of compliance with the various requirements a The tests shall be carried out separately for each cast as indicated by \u201cC\u201d, each dimension as indicated by \u201cD\u201d and each heat treatment batch as indicated by \u201cT\u201d. b The general conditions for selection and preparation of test samples and test pieces shall be in accordance with EN ISO 377 and ISO 14284. c If the products are continuously heat treated, one test piece shall be taken for each 25 t or part thereof, but at least one test piece shall be taken per cast. <\/td>\n<\/tr>\n | ||||||
| 15<\/td>\n | Annex A (normative) Ruling section for the mechanical properties Figure A.1 – Diameter of the ruling section for square and rectangular sections for quenching in oil or water <\/td>\n<\/tr>\n | ||||||
| 16<\/td>\n | Annex B (normative) Supplementary or special requirements Annex C (informative) Bibliography Annex D (informative) Dimensional standards applicable to products complying with this European Standard <\/td>\n<\/tr>\n | ||||||
| 17<\/td>\n | National annex NA (informative) Non-conflicting national additions Table NA1 – Chemical composition (% by mass) Table NA2 – Mechanical properties in the normalized condition Table NA3 – Mechanical properties in the quenched and tempered condition <\/td>\n<\/tr>\n | ||||||
| 18<\/td>\n | BS EN 10087:1999 <\/td>\n<\/tr>\n<\/table>\n","protected":false},"excerpt":{"rendered":" Free cutting steels. Technical delivery conditions for semi-finished products, hot rolled bars and rods<\/b><\/p>\n |