1、DEUTSCHE NORM December 1999 Open die steel forgings for general engineering purposes Part 2: Non-alloy quality and special steels English version of DIN EN 10250-2 DIN - EN 10250-2 ICs 77.140.45; 77.140.85 Freiformschmiedestcke aus Stahl fr allgemeine Verwendung - Teil 2: Unlegierte Qualitts- und Ed
2、elsthle This standard, together December 1999 edition, supersedes DIN 171 00, January 1980 edition (withdrawn in January 1991). with DIN EN 10250-1, European Standard EN 10250-2 : 1999 has the status of a DIN Standard. A comma is used as the decimal marker. National foreword This standard has been p
3、repared by ECISS/TC 28. The responsible German body involved in its preparation was the Normenausschuss Eisen und Stahl (Steel and Iron Standards Committee), Technical Committee Schmiedestcke. Amendments DIN 171 00, January 1980 edition, has been superseded by the specifications of DIN EN 10250-2. P
4、revious editions DIN 171 00: 1957-1 O, 1966-09, 1980-01. EN comprises 8 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-
5、Normen). Ref. No. DIN EN 10250-2 : 1999-1 English price group 08 Sales No. 1108 06.00 EUROPEAN STANDARD NORME EUROPENNE EUROPISCHE NORM EN 10250-2 October 1999 ICs 77.1 40.45: 77.1 40.85 English version Open die steel forgings for general engineering purposes Part 2: Non-alloy quality and special st
6、eels Pices forges en acier pour usage gnral - Partie 2: Aciers de qualit non allis et aciers spciaux Freiformschmiedestcke aus Stahl fr allgemeine Verwendung - Teil 2: Unlegierte Qualitts- und Edelsthle This European Standard was approved by CEN on 1999-09-09. CEN members are bound to comply with th
7、e CENKENELEC Internal Regulations which stipulate the conditions for giving this European Standard 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
8、or to any CEN member. The European Standards exist in three official versions (English, French, 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 vers
9、ions. CEN members are the national standards bodies of Austria, Belgium, the Czech Republic, Denmark, Finland, France, Germany, Greece, Iceland, Ireland, Italy, Luxembourg, the Netherlands, Norway, Portugal, Spain, Sweden, Switzerland, and the United Kingdom. CEN European Committee for Standardizati
10、on Comit Europen de Normalisation Europisches Komitee fr Normung Central Secretariat: rue de 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 10250-2 : 1999 E Page 2 EN 10250-2 : 1999 Contents
11、Page Foreword 1 Scope 2 Normative references 3 Chemical composition 4 Heat treatment 5 Mechanical properties Annex A (informative) Heat treatment 3 4 5 8 Foreword This European Standard has been prepared by Technical Committee ECISS/TC 28 “Steel forgings”, the secretariat of which is held by BSI. Th
12、is 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 April 2000, and conflicting national standards shall be withdrawn at the latest by April 2000. This European Standard has been prepared under a mandat
13、e 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 safety requirement of a New Approach Directive and which make refere
14、nce to this European Standard. The titles of the other Parts of this European Standard are: Part 1 : General requirements Part 3: Alloy special steels Part 4: Stainless steels According to the CENKENELEC Internal Regulations, the national standards organizations of the following countries are bound
15、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 United Kingdom. Page 3 EN 10250-2 : 1999 1 Scope This Part of this European Standar
16、d specifies the technical delivery requirements for open die forgings, forged bars and products pre-forged and finished in ring rolling mills, manufactured from non-alloy quality and special steels and supplied in the normalized, normalized and tempered, quenched and tempered or annealed condition N
17、OTE: The majority of steels listed in this Part of EN 10250, with properties in the quenched and tempered condition up to 160 mm thickness, are identical to steels specified in EN 10083-1 and -2 and more extensive information on hardenability and technological properties is given in that European St
18、andard. General Information on technical delivery conditions is given in EN 10021. 2 Normative references This Part of EN 10250 incorporates by dated or undated reference, provisions from other publications. These normative references are cited at the appropriate places in the text and the publicati
19、ons 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 references the latest edition of the publication referred to applies. EN 10003-1 EN
20、10021 EN 10083-1 EN 10083-2 EN 10250-1 Metallic materials - Brinell hardness test - Part 1: Test method. General technical delivery requirements for iron and steel products Quenched and tempered steels - Part 1: Technical delivery conditions for special steels Quenched and tempered steels - Part 2:
21、Technical delivery conditions for unalloyed quality steels Open die steel forgings for general engineering purposes - 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 gi
22、ven in table 1 (see A.7 and A.8, of EN 10250-1). Measures should be taken to prevent the addition from the scrap, or other material used in the manufacture of the steel, of such elements which affect the hardenability, mechanical properties and applicability of the steel. Page 4 EN 10250-2 : 1999 C
23、3.2 Product analysis Si Mm The product analysis shall not deviate from the specified cast analysis (see table 1) by more than the values specified in table 2. (see 9.2 to EN 10250-1). Max 0,045 0,035 4 Heat treatment Max Max 0,045 0.30 0,035 0,30 Heat treatment details are given in table A. 1 for gu
24、idance. 0,17 max) 0,22 ma2 Table 1: Steel grades and chemical composition - cast analysis1 0.55 035 Chemical composition % (dm) 0,37 to 0,44 0,42 to 0,50 0,42 to 0,50 Mn 0,40 0,40 0,40 P Is ICI Steel Designation Cr+Mo+ Ni Max Mo Max 0,08 0,08 Ni Max 0,30 0,30 Al Min 0,020 0,020 Name Number 1.0038 S2
25、35JRG2 1,40 max 0,48 1,40 max 0,48 1.0116 1 .O570 S235J2G3 S355J2G3 1,60 max 0,035 0,045 0,045 0,035 0,045 0,045 0,035 - - 0,30 0,40 0,40 0,40 0,40 0.40 0,40 - - 0,035 0,045 0,045 0,035 0,045 0,045 0,035 0,08 0,lO 0.10 OJO o, 10 0.10 0,lO 0,30 0,40 0,40 0.40 0,40 0,40 0,40 0,48 0,63 0,63 0,63 0,63 0
26、.63 0,63 c22 C25 C25E 1.0402 1.0406 1.1158 0,40 to 0,70 0,40 to 0,70 0,40 to 0,70 0,50 to 0,80 0,50 to 0,80 0,50 to 0,80 C30 c35 C35E 1.0528 1.0501 1.1181 0.50 to 0,80 0.50 to 0,80 0,50 to 0,80 0,045 0,045 0,035 0,045 0,045 0,035 0,40 0,40 0,40 0,lO OJO OJO 0,40 0,40 0,40 0,63 0,63 0,63 C40 c45 C45E
27、 1.0511 1.0503 1.1191 1.0540 1.0535 1.1203 0,63 0,63 0,63 C50 c55 C55E 0,60 to 0,90 0.60 to 0,90 0,60 to 0,90 0,60 to 0,90 0,60 to 0,90 0,045 0,045 0,035 0,045 0,035 0,lO 0.10 0,lO OJO OJO 0,40 0,40 0,40 0,40 0,40 0,40 C60 C60E 1.0601 1.1221 0,63 463 1,30 to 1.65 0,035 I 0,035 I 0,40 0,lO 28Mn6 1.11
28、70 0,63 20Mn5 1.1133 0,17 to 0,23 I 0,40 1,OO to 1,50 0,035 I 0,035 I 0,40 0,63 0.10 0,40 0,020 ) At the option of the manufacturer the elements aluminium, titanium, vanadium and niobium may be added singly or in combination for grain size control purposes. Elements not quoted in table 1 shall not b
29、e added to the steel without the agreement of the purchaser, except for the purpose of finishing the heat. )For forgings with an equivalent diameter or thickness 100 mm the carbon content shall be agreed between purchaser and supplier. Page 5 EN 10250-2 : 1999 Element Carbon Silicon Manganese Phosph
30、orus Table 2: Permissible deviations between the product analysis and the limiting values given in table 1 for the cast analysis Permissible maximum content Permissible deviation in the cast analysis % % c 0,55 +- 0,02 0,55 I 0,65 & 0,03 - 0,40 f 0,03 0,40 f 0,04 - 1,OO I 1,65 f 0,06 5 0,045 + 0,005
31、 Sulfur Chromium I 0,045 + 0,005 - 0,40 + 0,05 Molybdenum Nickel I 0,lO + 0,03 I 0,40 + 0,05 5 Mechanical properties Aluminium 5.1 tempered condition Forgings in the normalized, normalized and tempered, and quenched and 2 0,020 - 0,005 The mechanical properties determined on test pieces selected, pr
32、epared and tested in accordance with clauses 11 and 12 of EN 10250-1 shall conform to the property requirements given in tables 3 and 4 respectively. 5.2 Forgings in the annealed condition (Steels C45, C55 and C60) Representative forgings selected by a method agreed with the purchaser shall be Brine
33、ll hardness tested in designated positions using techniques described in EN 10003-1. The maximum hardness obtained shall not exceed those given for the steel in table 5. Page 6 EN 10250-2 : 1999 a w 3 E B .CI a 3 z E B N Q .CI I a2 9 E .CI - E E z VI Y V O x - E E 8 vi VI Y V O +# 3 - E x N VI Y v O
34、 u 2 - E E 0 O VI Y I - E E O m m VI Ec v O +-i 3 - E E 2 O VI vi V 3 P Y - E E O P VI c Y Page 7 EN 10250-2 : 1999 Page 8 EN 10250-2 : 1999 S tee1 designation Name I Number Table 5: Maximum hardness for forgings to be supplied in the annealed condition Hardness HBMax c55 C60 I c45 I 1.0503 I 207 I
35、1 .O535 229 1 .O60 1 24 1 Steel designation Name Number S235JRG2 1 .O038 S235J2G3 1.01 16 S355J2G3 1.0570 c22 1 .O402 C25 1 .O406 C25E 1.1158 C30 1 .O528 c35 1.0501 C35E 1.1181 C40 1.0511 c45 1 .O503 C45E 1.1191 C50 1 .O540 c55 1.0535 C55E 1.1203 C60 1 .O601 C60E 1.1221 28Mn6 1.1170 20Mn5 1.1133 Ann
36、ex A (informative) Heat treatment Heat treatment details are given in table A. 1. Quenching Cooling Tempering Normalizing temperature medium temperature temperature “C “C “C - 890 to 950 890 to 950 - - - 890 to 950 860 to 900 Water 550 to 660 880 to 920 860 to 900 Water 550 to 660 880 to 920 860 to
37、900 Water 550 to 660 880 to 920 850 to 890 Water 550 to 660 870 to 910 840 to 880 Water or oil 550 to 660 860 to 900 840 to 880 Water or oil 550 to 660 860 to 900 830 to 870 Water or oil 550 to 660 850 to 890 820 to 860 Water or oil 550 to 660 840 to 880 820 to 860 Water or oil 550 to 660 840 to 880
38、 810 to 850 Oil or water 550 to 660 830 to 870 805 to 845 Oil or water 550 to 660 825 to 865 805 to 845 Oil or water 550 to 660 825 to 865 800 to 840 Oil or water 550 to 660 820 to 860 800 to 840 Oil or water 550 to 660 820 to 860 830 to 870 Water or oil 540 to 680 850 to 890 870 to 910 Water or oil 550 to 660 880 to 930 - Table A.l: Heat treatment
