1、 STD.BSI BS EN 10250-2-ENGL 2000 M 1b2gbb 0829050 870 m BRITISH STANDARD Open die steel forgings for general engineering purposes - Part 2: Non-alloy quality and special steels The European Standard EN 10250-21999 has the status of a British Standard ICs 77.140.85 BS EN 10250-2:2000 NO COPYING WITHO
2、UT BSI PERMISSION EXCEPT AS PEBMTED BY COPYRIGHT LAW STD*BSI BS EN b0250-2-ENGL 2000 W Lb24bb9 082905L 707 BS EN 10260-2:2000 direction of the Engineering Amd. No. Date Sector Committee, was published under the authority of the Standards Committee and comes into effect on 15 February 2000 National f
3、oreword Comments This British Standard is the official English language version of EN 10252:1999. The UK participation in its preparation was entrusted to Technical Committee ISEB1, Wrought steels, which has the responsibility to: - aid enquirers to understand the te them in the UK A list of organiz
4、ations represented on this committee can be obtained on request to its secretary. Cross-references The British Standards which implement international or European publications referred to in this document may be found in the BSI Standards Catalogue under the section entitied “International Standards
5、 Correspondence Index”, or by using the “Find” facility of the BSI Standards Electronic Catalogue. A British Standard does not purport to include ail the necessary provisions of a contract Users of British Standards are responsible for their correct application Compliance with a British Standard doe
6、s not of itself confer immunity from legal obligations. Summary of pages This document comprises a front cover, an inside front cover, the EN titie page, pages 2 to 10, an inside back cover and a back cover. The BSI copyright notice displayed in this document indicates when the document was last iss
7、ued. O BSI 02-2000 I I ISBN O 580 35392 3 STDmBSI BS EN 10250-2-ENGL 2000 Lb24bb9 0829052 by3 EUROPEAN STANDARD EN 10250-2 NORME EUROPEENNE EUROPISCHE NORM October 1999 ICC 77.140.20; 77.140.85 English version Open die steel forgings for general engineering purposes - Part 2: Non-alloy quality and s
8、pecial steels Pices forges en acier pour usage gnral - Partie 2: Aciers en 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 9 September 1999. CEN members are bound to
9、 comply with the CENICENELEC Internal Regulations which stipulate the conditions for giving this Europmn Standard the status of a national standard without any alteration. Up-todate lists and bibliographical references concerning wch national standards may be obtained on application to the Central S
10、ecretariat or to any CEN member. This European Standard exists in three official versions (English, French, German). A version in any other language made by tralslation under the responsibility of a CEN member into Name S235JRG2 S235J2G3 S35 5 J2G3 c22 C25 C25E C30 c35 C35E C40 c45 C45E C50 c55 C55E
11、 C6O C60E 28Mn6 20Mn5 tion Number 1 .O038 1.01 16 1 .O570 1 .O402 1 .O406 1.1 158 1 .O528 1.0501 1.1 181 1.0511 1 .O503 1.1 191 1 .O540 1.0535 1.1203 1 .O60 1 1.1221 1.1 170 1.1 133 Quenching Cooling Tempering temp erature medium temperature - - l- I- 860 to 900 860 to 900 860 to 900 850 to 890 840
12、to 880 840 to 880 Water Water Water Water Water or oil Water or oil 550 to 660 550 to 660 550 to 660 550 to 660 550 to 660 550 to 660 810 to 850 805 to 845 800 to 840 Normalizing temperature “C 890 to 950 890 to 950 890 to 950 880 to 920 880 to 920 880 to 920 870 to 910 860 to 900 860 to 900 850 to
13、890 840 to 880 840 to 880 830 to 870 825 to 865 825 to 865 820 to 860 820 to 860 850 to 890 880 to 930 QBSI 02-2000 STDeBSI BS EN L0250-2-ENGL ZOO0 Lb24bb9 08290b2 592 BS EN 10250-2:2000 BSI 389 Chiswick High Road London w4 4AL BSI - British Standards Institution BSI is the independent national body
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