1、STD*BSI BS EN L0250-L-ENGL 1779 Lb29bb9 0838592 T99 BRITISH STANDARD Open die steel forgings for general engineering purposes - Part 1: General requirements The European Standard EN 10250-1:1999 has the status of a British Standard ICs 77.140.85 BS EN 10250-1: 1999 NO COPYING WITHOUT BSI PERMISSION
2、EXCEPT AS PERMITTED BY COPYRIGHT LAW STD=BSI BS EN 10250-1-ENGL 1999 1b2tbbS 0818593 985 H Amd. No. BS EN 10250-1:1999 Date Comments National foreword This British Standard is the English language version of EN 10251:1999. The UK participation in its preparation was entrusted to Technical Committee
3、ISEBl, Wrought steels, which has the responsibility to: - aid enquirers to understand the text; - present to the responsible European committee any enquiries on the - monitor related internationa.l and European developments and promulgate interpretation, or proposals for change, and keep the UK inte
4、rests informed; them in the UK. A list of organizations represented on this committee can be obtained on request to its secretary. Cross-references The British Standards which implement intemational or European publications referred to in this document may be found in the BSI Standards Catalogue und
5、er the section entitled “Intedonal Standards Correspondence Index”, or by using the “fi# facility of the BSI Standards Electronic Catalogue. A British Standard does not purport to include all the necessary provisions of a contract. Users of British Standards are responsible for their correct applica
6、tion. Compliance with a British Standard does not of itself confer immunity from legal obligations. Summary of pages This document comprises a front cover, an inside front cover, the EN title page, pages 2 to 17 and a back cover. The BSI copynght notice displayed in this document indicates when the
7、document was last issued. This British Standard, having been prepared under the direction of the Engineering Sedor Committee, was published under the authority of the Standards Committee and comes into effect on 15 December 1999 O BSI 12-1999 ISBN O 580 35067 3 Amendments issued since publication ST
8、D.BSI BS EN LOSO-I-ENGL 1999 m Lb24bb 0818594 811 EN 10250=1 EUROPEAN STANDARD NORME EUROPENNE EUROPISCHE NORM August 1999 ICs 77.140.85 English version Open die steel forgings for general engineering purposes - Part 1 : General requirements Pices forges en acier pour usage gnral - Partie 1 : Exigen
9、ces gnrales Freiformschmiedestcke aus Stahl fr allgemeine Verwendung - Teil 1 : Allgemeine Anforderungen This European Standard was approved by CEN on 16 July 1999. CEN members are bound to comply with the CENiCENELEC Internal Regulations which stipulate the conditions for giving this European Stand
10、ard the status of a national standard without any alteration. Up-to-date lists and bibliographical references concerning sich national standards may be obtained on application to the Central Secretariat or to any CEN member. This European Standard exists in three official versions (English, French,
11、German). A version in any other language made by trmslation under the responsibility of a CEN member into its own language and notified to the Central Secretariat has the same status as tie officiai versions. CEN members are the national standards bodies of Austria, Belgium, Czech Republic, Denmark,
12、 Finland, France, Germany, Greece, Iceland, Ireland, Italy, Luxembourg, Netherlands, Norway, Portugal, Spain, Sweden, Switzerland and United Kingdom. EUROPEAN COMMITTEE FOR STANDARDIZATION COMIT EUROPEN DE NORMALISATION EUROPISCHES KOMITEE FUR NORMUNCi Central Secretariat: rue de Stassar, 36 B-1050
13、Brussels O 1999 CEN All rights of exploitation in any form and by any means reserved worldwide for CEN national Members. Ref. No. EN 10250-1:1999 E Page 2 EN 10250-1:1999 Contents Page Foreword 1 2 3 4 5 6 7 8 9 10 11 12 13 Scope Normative references Definitions Classification and designation Inform
14、ation to be supplied by the purchaser Manufacture of the steel Manufacture of the product Surface condition and internal soundness Chemical composition Mechanical properties Sampling and preparation of test pieces Mechanical test methods Retests and re-heat treatment 14 Inspection 15 Marking Annex A
15、 (normative) Options Annex B (informative) Ruling section and equivalent thickness 3 4 6 6 7 7 8 9 9 11 11 12 12 14 16 OBSI 12-1999 STD-BSI BS EN 10250-1-ENGL 1999 E Lb24bb9 O81859b b94 PI Page 3 EN 10250-1:1999 Foreword This European Standard has been prepared by Technical Committee ECISS/TC 28, St
16、eel forgings, the Secretariat of which is held by BSI. This European Standard shall be given the status of a national standard, either by publication of an identical text or by endorsement, at the latest by February 2000, and conflicting national standards shall be withdrawn at the latest by Februar
17、y 2000. This European Standard has been prepared under a mandate given to CEN by the European Commission and the European Free Trade Association. This European Standard is considered to be a supporting standard to those application and product standards which in themselves support an essential safet
18、y requirement of a New Approach Directive and which make reference to this European Standard. The titles of the other Parts of this European Standard are: Part 2 : Non-alloy quality and special steels Part 3 : Alloy special steels Part 4 : Stainless steels According to the CENKENELEC Internal Regula
19、tions, the national standards organizations of the following countries are bound to implement this European Standard: Austria, Belgium, Czech Republic, Denmark, Finland, France, Germany, Greece, Iceland, Ireland, Italy, Luxembourg, Netherlands, Norway, Portugal, Spain, Sweden, Switzerland and the Un
20、ited Kingdom. OBSI 12-1999 Page 4 EN 10250-1:1999 1 Scope This part of this European Standard specifies the general technical delivery conditions for open die forgings, forged bars, and products pre-forged and finished in ring rolling mills, for general engineering purposes. General information on t
21、echnical delivery conditions is given in EN 1002 1. 2 Normative references applies. EN 287- 1 EN 288-1 EN 288-2 EN 288-3 EN 10002-1 EN 10003- 1 EN 10020 EN 10021 EN 10027-1 EN 10027-2 EN 10045-1 EN 10052 EN 10079 This part of EN 10250 incorporates by dated or undated reference, provisions fiom other
22、 publications. These normative references are cited at the appropriate places in the text and the publications are listed hereafter. For dated references, subsequent amendments to, or revisions of, any of these publications apply to this European Standard, only when incorporated in it by amendment o
23、r revision. For undated references the latest edition of the publication referred to Approval testing of welders. Fusion welding - Part 1 : Steels Specification and qualification of welding procedures for metallic materials - Part 1 : General rules for fusion welding Specification and qualification
24、of welding procedures for metallic materials - Part 2: Welding procedure specification for arc welding Specification and qualification of welding procedures for metallic materials - Part 3: Welding procedure tests for the arc welding of steels Metallic materials - Tensile testing - Part 1 : Method o
25、f test Metallic materials - Brinell hardness test - Part 1 : Test method Definition and classification of grades of steel General technical delivery requirements for steel and iron products Designation systems for steels - Part 1 : Steel names, principal symbols Designation systems for steels - Part
26、 2: Numerical system Metallic materials - Charpy impact test - Part 1 : Test method Vocabulary of heat treatment terms for ferrous products Definition of steel products. OBSI 12-1999 STD-BSI BS EN 30250-1-ENGL 3779 m Lb24bb7 0838578 4b7 Page 5 EN 10250-1:1999 EN 10204 Metallic products - types of in
27、spection documents EN 10228- 1 Non-destructive testing of steel forgings - Part 1 : Magnetic particle inspection EN 10228-2 Non-destructive testing of steel forgings - Part 2: Penetrant testing EN 10228-3 Non-destructive testing of steel forgings - Part 3: Ultrasonic testing of ferritic or martensit
28、ic steel forgings EN 10228-4 Non-destructive testing of steel forgings - Part 4: Ultrasonic testing of austenitic and austenitic-ferritic stainless steel forgings EN IS0 377 Steel and steel products - Location and preparation of samples and test pieces for mechanical testing (IS0 377: 1997) CR 10260
29、 Designation systems for steels - Additional symbols EN IS0 365 1-2 Determination of resistance to intergranular corrosion of stainless steels - Part 2: Ferritic, austenitic and ferritic-austenitic (duplex) stainless steels - Corrosion test in media containing sulfuric acid (IS0 365 1-2: 1998) CR 10
30、261 ECISS Information Circular 11 - Iron and steel - Review of available methods of chemical analysis prEN 10168 Iron and steel documents - Inspection documents - Contents 3 Definitions For the purposes of this part of this European Standard, the following definition applies in addition to the defin
31、itions in EN 10020, EN 10021, EN 10052, EN 10079 and EN IS0 377. 3.1 batch: forgings of similar dimensions from the same cast, made by the same forging procedure and from the same heat treatment charge. ?Similar dimensions? are to be taken as forgings having dimensions within f 1 O % of the equivale
32、nt thickness 4 Classification and designation 4.1 Classification The steels covered by this European Standard are classified as follows: - Part 2: Non-alloy quality and special steels; - Part 3: Alloy special steels; - Part 4: Stainless steels. OBSI 12-1 999 Page 6 EN 10250-111999 4.2 Designation Th
33、e steels in parts 2 to 4 of this European Standard shall be designated in accordance with the requirements of EN 10027-1 and EN 10027-2, and CEN CR 10260. 5 Information to be supplied by the purchaser 5.1 Mandatory information The purchaser shall select the steel type, the shape and dimensions of th
34、e forgings taking the intended use into account. The purchaser shall provide in the order all the information necessary for describing the forging and its characteristics and details concerning delivery including the following: a) the quantity of forgings required; b) the forging dimensions, or the
35、drawing number(s) containing the dimensions, tolerances and surface finish, with which the forging shall conform; c) the steel designation (name or number) of the material of which the forgings are made (see 4.2); d) whether the purchaser has any specific requirements on the hot working process or n
36、eeds to be informed of the forging procedure (see A.2 and A.3); e) whether production and testing of the forgings is to be witnessed by the purchasers representative, and if so, the particular stages in production and testing at which the purchasers representative may require to be present (see clau
37、se 14); f) any required options (see 5.2 and annex A); g) if required, the type of inspection document in accordance with EN 10204. 5.2 Options A number of options are available and these are detailed in annex A. Where any of the options given are specified at the time of the order, the forgings sha
38、ll conform to the requirements of any such option, in addition to the mandatory requirements of this European Standard. If the purchaser does not speci any options at the time of enquiry and order, the manufacturer shall supply in accordance with the basic specification. 6 Manufacture of the steel 6
39、.1 Steelmaking process The steel shall be produced by an electric process or one of the basic oxygen processes (see A.l). OBSI 12-1 999 - STD-BSI BS EN 20250-1-ENGL 1999 Lb24bb9 OLbOO ?Li5 m Page 7 EN 10250-111999 6.2 Deoxidation The steel shall be fully killed. 7 Manufacture of the product 7.1 Hot
40、working The choice of hot working process shall be at the discretion of the manufacturer (see A.2). 7.2 Forging reduction The forging shall receive a sufficient forging reduction to completely consolidate the forging and remove the cast structure (see A.3). 7.3 Heat treatment The forgings shall be d
41、elivered in a heat treated condition as specified in the relevant part of EN 10250, unless otherwise agreed at the time of enquiry and order. 7.4 Weldability The steels in this European Standard are generally regarded as being weldable. Welding shall be carried out in accordance with EN 287 and EN 2
42、88. 8 Surface condition and internal soundness 8.1 General The forgings shall be sound and fiee from such segregation, cracks, laminations or defects that preclude their intended use (see A.4, A.5 and A.6). 8.2 Removal or surface defects 8.2.1 Conformity to 8.1 Before forgings are despatched or pres
43、ented for acceptance, surface defects shall be removed in order to conform to 8.1. 8.2.2 Chipping andor grinding Surface defects shall be removed by chipping and/or grinding providing the residual thickness meets the minimum tolerance and that the resulting depression does not undercut the rest of t
44、he surface. If the thickness is to be reduced to below the minimum tolerance, the repair shall only be carried out following agreement with the purchaser. OBSI 12-1999 Page 8 EN 10250-11999 8.2.3 Chipping and/or grinding and resurfacing by welding If resurfacing by welding is agreed by the purchaser
45、, prior to the repair being carried out, surface defects exceeding the acceptance criteria shall be removed by chipping and/or grinding followed by resurfacing by welding and levelling the weld. Any welding operations shall be in accordance with EN 287-1 and EN 288- 1, EN 288-2 and EN 288-3. 8.3 Dim
46、ensions, shape and tolerances and nominal mass The dimensions and shape of the product shall conform to the tolerances stated in the order. Any calculation of the nominal mass of the product shall be based on the following density values: - non-alloy and alloyed steels in EN 10250-2 and EN 10250-3 -
47、 austenitic stainless CrNi steels in EN 10250-4 - austenitic stainless CrNiMo steels in EN 10250-4 7,85 kg/dm3 7,9 kg/dm3 8,0 kg/dm3 8.4 Compatibility with non-destructive testing NDT The agreed requirements for surface finish shall be compatible with the requirements of the reference to NDT standar
48、ds (EN 10228). 9 Chemical composition 9.1 Cast analysis The chemical composition of the steel, determined by cast analysis, shall conform to the requirements specified in the relevant parts of EN 10250. Elements not listed in the composition tables in the relevant parts of EN 10250 shall not be inte
49、ntionally added without the agreement of the purchaser except for finishing the cast (see options A.7 and A.8). 9.2 Product analysis (optional requirement) If required and specified by the purchaser a product analysis shall be carried out and reported instead of a cast analysis (see A.9). The results of a product analysis on samples taken and prepared in accordance with clause 1 1 shall not deviate Fom the specified limits for the cast analysis by more than the values given in the tables of permissible deviations of product analysis in the relevant parts of EN 10250 (
