1、DEUTSCHE NORM December 1999 Open die steel forgings for general engineering purposes Part 3: Alloy special steels English version of DIN EN 10250-3 DIN EN 10250-3 - ICs 77.140.20; 77.140.85 Freiformschmiedestcke aus Stahl fr allgemeine Verwendung - Teil 3: Legierte Edelsthle European Standard EN 102
2、50-3 : 1999 has the status of a DIN Standard. A comma is used as the decimal marker. National foreword This standard has been prepared by ECISS/TC 28. The responsible German body involved in its preparation was the Normenausschuss Eisen und Stahl (Steel and Iron Standards Committee), Technical Commi
3、ttee Schmiedestcke. EN comprises 11 pages. No pari of this standard may be reproduced without the prior permission of V Deutsches Institut fur Normung e. V., Berlin. Beuth Verlag GmbH, 10772 Berlin, Germany, s the exclusive right of sale for German Standards (DIN-Normen). Ref. No. DIN EN 10250-3 : 1
4、999-1 English price group 07 Sales No. 1107 06.00 EUROPEAN STANDARD NORME EUROPENNE EUROPISCHE NORM EN 10250-3 October 1999 ICs 77.1 40.20: 77.1 40.85 English version Open die steel forgings for general engineering purposes Part 3: Alloy special steels Pices forges en acier pour usage gnral - Partie
5、 3: Aciers spciaux allis Legierte Edelsthle Freiformschmiedestcke aus Stahl fr allgemeine Verwendung - Teil 3: This European Standard was approved by CEN on 1999-09-09. CEN members are bound to comply with the CENKENELEC Internal Regulations which stipulate the conditions for giving this European St
6、andard the status of a national standard without any alteration. Up-to-date lists and bibliographical references concerning such national stand- ards may be obtained on application to the Central Secretariat or to any CEN member. The European Standards exist in three official versions (English, Fren
7、ch, German). A version in any other language made by translation under the responsibility of a CEN member into its own language and notified to the Central Secretariat has the same status as the official versions. CEN members are the national standards bodies of Austria, Belgium, the Czech Republic,
8、 Denmark, Finland, France, Germany, Greece, Iceland, Ireland, Italy, Luxembourg, the Netherlands, Norway, Portugal, Spain, Sweden, Switzerland, and the United Kingdom. CEN European Committee for Standardization Comit Europen de Normalisation Europisches Komitee fr Normung Central Secretariat: rue de
9、 Stassart 36, B-1050 Brussels O 1999. CEN - All rights of exploitation in any form and by any means reserved worldwide for CEN national members. Ref. No. EN 10250-3 : 1999 E Page 2 EN 10250-3 : 1999 Contents Page Foreword 1 Scope 2 Normative references 3 Chemical composition 4 Heat treatment 5 Mecha
10、nical properties Annex A (informative) Heat treatment 2 3 3 3 4 4 11 Foreword This European Standard has been prepared by Technical Committee ECISSRC 28 “Steel forgings”, the secretariat of which is held by BSI. This European Standard shall be given the status of a national standard, either by publi
11、cation of an identical text or by endorsement, at the latest by April 2000, and conflicting national standards shall be withdrawn at the latest by April 2000. This European Standard has been prepared under a mandate given to CEN by the European Commission and the European Free Trade Association. Thi
12、s European Standard is considered to be a supporting standard to those application and product standards which in themselves support an essential safety requirement of a New Approach Directive and which make reference to this European Standard. The titles of the other Parts of this European Standard
13、 are: Part 1: General requirements Part 2: Non-alloy quality and special steels Part 4: Stainless steels According to the CENRENELEC Internal Regulations, the national standards organizations of the following countries are bound to implement this European Standard: Austria, Belgium, Czech Republic,
14、Denmark, Finland, France, Germany, Greece, Iceland, Ireland, Italy, Luxembourg, Netherlands, Norway, Portugal, Spain, Sweden, Switzerland and the United Kingdom. Page 3 EN 10250-3 : 1999 1 Scope This Part of this European Standard specifies the technical delivery requirements for open die forgings,
15、forged bars and products pre-forged and finished in ring rolling mills, manufactured from alloy special steel and supplied in the quenched and tempered condition. NOTIZ: The majority of steels listed in this Part of EN 10250 are identical to steels specified in EN 10083-1 and more extensive Wormatio
16、n on hardenability and technological properties is given in that European Standard. General information on technical delivery conditions is given in EN 1002 1. 2 Normative references This Part of EN 10250 incorporates by dated or undated reference, provisions from other publications. These normative
17、 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 or revision. For undated referen
18、ces the latest edition of the publication referred to applies. EN 10021 General technical delivery requirements for iron and steel products EN 10083-1 Quenched and tempered steels - Part 1: Technical delivery conditions for special steels EN 10250-1 Open die steel forgings for general engineering pu
19、rposes - Part 1: General requirements 3 Chemical composition 3.1 Cast analysis The chemical composition of the steel shall be determined by cast analysis and shall conform to the analysis given in table 1 (see A.7 and A.8, of EN 10250-1). Measures should be taken to prevent the addition from the scr
20、ap, or other material used in the manufacture of the steels, of such elements which affect the hardenability, mechanical properties and applicability of the steel. 3.2 Product analysis The product analysis shall not deviate from the specified cast analysis (see table 1) by more than the values speci
21、fied in table 2. (see 9.2 to EN 10250-1). Page 4 EN 10250-3 : 1999 4 Heat treatment Heat treatment details are not given in table Al for guidance 5 Mechanical properties The mechanical properties determined on test pieces selected, prepared and tested in accordance with clauses 11 and 12 of EN 10250
22、-1 shall conform to the property requirements given in table 3. Page 5 EN 10250-3 : 1999 M $ u 8 83 E P z I s o? O O - Page 6 EN 10250-3 : 1999 z 8 U O s s in O - O O VI in m 8 8 - in m m 2 O U 3 0- Page 7 EN 10250-3 : 1999 Element Permissible maximum Table 2: Permissible deviations between the prod
23、uct analysis and the limiting values given in table 1 for the cast analysis Permissible deviation Carbon Silicon) Manganese Phosphorus Sulphur content in the cast analysis % % I0,55 f 0,02 I0,40 + 0,03 I1,OO f 0,04 f 0,06 1,00 I 1,50 50,035 + 0,005 50,045 + 0,005 Chromium Nickel I2,OO 2,OO 5 3,50 0,
24、30 I 1,lO f 0,06 5 2,oo f 0,05 f 0,07 2,OO I 4,lO f 0,05 & 0,12 f 0,03 I 5 0,30 I Molybdenum I I0,25 I f 0,02 I I I) For steel 40 Cr Mo V13 9, the permissible deviation is f 0,03 % I Page 8 EN 10250-3 : 1999 Page 9 EN 10250-3 : 1999 4 E Page 1 O EN 10250-3 : 1999 VlNOv, nmniui I 8 8 8 U II b 7 3 a U
25、 .3 3 8 II 3 h M m Cu v, 04 3 Page 11 EN 10250-3 : 1999 Name 38Cr2 Annex A (informative) Heat treatment Heat treatment details are given in table A. 1 Number “C “C 1.7003 830 to 870 540 to 680 Table A.1: Heat treatment conditions 34Cr4 34CrMo4 46Cr2 37Cr4 42CrMo4 5OCrMo4 41Cr4 Steel designation I Qu
26、enching temperature) I Tempering temperature 1.7033 830 to 870 540 to 680 1.7220 830 to 870 540 to 680 1.7006 820 to 860 540 to 680 1.7034 825 to 865 540 to 680 1.7225 820 to 860 540 to 680 1.7228 820 to 860 540 to 680 1.7035 820 to 860 540 to 680 25CrMo4 36CrNiMo4 34CrNiMo6 30CrNiMo8 3 6NiCrMo 1 6
27、1.7218 840 to 880 540 to 680 1.6511 820 to 850 540 to 680 1.6582 830 to 860 540 to 680 1.6580 830 to 860 540 to 680 1.6773 865 to 885 550 to 650 33NiCrMoV14-5 4OCrMoV 13-9 18CrMo4 2OMnMoNi4-5 3OCrMoV9 32CrMo12 5 lCrV4 I 1.8159 I 820 to 860 I 540 to 680 1.6956 820 to 890 550 to 650 1.8523 920 to 970
28、550 to 720 1.7243 850 to 880 595 to 700 1.6311 870 to 940 630 to 680 1.7707 840 to 870 540 to 680 1.7361 890 to 940 550 to 740 28NiCrMoV8-5 I 1.6932 I 830 to 870 I 550 to 850 NOTE: Quenching from hardening may be carried out in oil, water, or water based solutions. Caution should be observed in the use of water as a quenching medium to avoid the risk of cracking the forgings.
