1、BRITISH STANDARDBS EN 10277-3:2008Bright steel products Technical delivery conditions Part 3: Free-cutting steelsICS 77.140.10; 77.140.60g49g50g3g38g50g51g60g44g49g42g3g58g44g55g43g50g56g55g3g37g54g44g3g51g40g53g48g44g54g54g44g50g49g3g40g59g38g40g51g55g3g36g54g3g51g40g53g48g44g55g55g40g39g3g37g60g3g
2、38g50g51g60g53g44g42g43g55g3g47g36g58BS EN 10277-3:2008This British Standard was published under the authority of the Standards Policy and Strategy Committee on 30 April 2008 BSI 2008ISBN 978 0 580 52926 9National forewordThis British Standard is the UK implementation of EN 10277-3:2008. It supersed
3、es BS EN 10277-3:1999 which is withdrawn.The UK participation in its preparation was entrusted to Technical Committee ISE/31, Wrought steels.A list of organizations represented on this committee can be obtained on request to its secretary.This publication does not purport to include all the necessar
4、y provisions of a contract. Users are responsible for its correct application.Compliance with a British Standard cannot confer immunity from legal obligations.Amendments/corrigenda issued since publicationDate CommentsEUROPEAN STANDARDNORME EUROPENNEEUROPISCHE NORMEN 10277-3March 2008ICS 77.140.10;
5、77.140.60 Supersedes EN 10277-3:1999 English VersionBright steel products - Technical delivery conditions - Part 3:Free-cutting steelsProduits en acier transforms froid - Conditionstechniques de livraison - Partie 3: Aciers de dcolletageBlankstahlerzeugnisse - Technische Lieferbedingungen -Teil 3: A
6、utomatensthleThis European Standard was approved by CEN on 4 February 2008.CEN members are bound to comply with the CEN/CENELEC Internal Regulations which stipulate the conditions for giving this EuropeanStandard the status of a national standard without any alteration. Up-to-date lists and bibliogr
7、aphical references concerning such nationalstandards may be obtained on application to the CEN Management Centre or to any CEN member.This European Standard exists in three official versions (English, French, German). A version in any other language made by translationunder the responsibility of a C
8、EN member into its own language and notified to the CEN Management Centre has the same status as theofficial versions.CEN members are the national standards bodies of Austria, Belgium, Bulgaria, Cyprus, Czech Republic, Denmark, Estonia, Finland,France, Germany, Greece, Hungary, Iceland, Ireland, Ita
9、ly, Latvia, Lithuania, Luxembourg, Malta, Netherlands, Norway, Poland, Portugal,Romania, Slovakia, Slovenia, Spain, Sweden, Switzerland and United Kingdom.EUROPEAN COMMITTEE FOR STANDARDIZATIONCOMIT EUROPEN DE NORMALISATIONEUROPISCHES KOMITEE FR NORMUNGManagement Centre: rue de Stassart, 36 B-1050 B
10、russels 2008 CEN All rights of exploitation in any form and by any means reservedworldwide for CEN national Members.Ref. No. EN 10277-3:2008: EEN 10277-3:2008 (E) 2 Contents Page Foreword3 1 Scope 4 2 Normative references 4 3 Terms and definitions .4 4 Classification and designation.4 4.1 Classifica
11、tion4 4.2 Designation 4 5 Information to be supplied by the purchaser .4 6 Manufacturing process .4 7 Requirements.4 7.1 Chemical composition 4 7.2 Mechanical properties.5 7.3 Options .5 8 Inspection and testing.5 9 Marking .5 BS EN 10277-3:2008EN 10277-3:2008 (E) 3 Foreword This document (EN 10277-
12、3:2008) has been prepared by Technical Committee ECISS/TC 23 “Steels for heat treatment, alloy steels and free-cutting steels - Qualities and dimensions”, the secretariat of which is held by DIN. This European Standard shall be given the status of a national standard, either by publication of an ide
13、ntical text or by endorsement, at the latest by September 2008, and conflicting national standards shall be withdrawn at the latest by September 2008. Attention is drawn to the possibility that some of the elements of this document may be the subject of patent rights. CEN and/or CENELEC shall not be
14、 held responsible for identifying any or all such patent rights. This document supersedes EN 10277-3:1999. According to the CEN/CENELEC Internal Regulations, the national standards organizations of the following countries are bound to implement this European Standard: Austria, Belgium, Bulgaria, Cyp
15、rus, Czech Republic, Denmark, Estonia, Finland, France, Germany, Greece, Hungary, Iceland, Ireland, Italy, Latvia, Lithuania, Luxembourg, Malta, Netherlands, Norway, Poland, Portugal, Romania, Slovakia, Slovenia, Spain, Sweden, Switzerland and the United Kingdom. This European Standard EN 10277 Brig
16、ht steel products - Technical delivery conditions is subdivided as follows: Part 1: General; Part 2: Steels for general engineering purposes; Part 3: Free-cutting steels; Part 4: Case hardening steels; Part 5: Steels for quenching and tempering. During the preparation of the first edition of this Eu
17、ropean Standard there were not enough statistical data available concerning mechanical properties of bright bar products. Since then it has been recognized that the proof strength values in the cold drawn condition were too high. In addition, cyclic stresses that occur during straightening can reduc
18、e the proof strength (Bauschingers effect), which was not taken into account when drafting the first edition of this standard. In this second edition the proof strength values of non-alloy and alloy grades in condition +QT+C in parts 3 and 5 have been adjusted downwards compared to the first edition
19、. Furthermore for this part the tensile strength values of 36SMn(PB)14 and 38SMn(Pb)28 in condition +C and for 35S(Pb)20 in condition +QT+C were amended in the table for mechanical properties for steels for quenching and tempering. BS EN 10277-3:2008EN 10277-3:2008 (E) 4 1 Scope This part of EN 1027
20、7 applies to bright steel bars in the drawn, turned or ground condition, in straight lengths of free-cutting steels. This EN 10277-3 is complemented by EN 10277-1. 2 Normative references The following referenced documents are indispensable for the application of this document. For dated references,
21、only the edition cited applies. For undated references, the latest edition of the referenced document (including any amendments) applies. EN 10087, Free-cutting steels - Technical delivery conditions for semi-finished products, hot-rolled bars and rods EN 10277-1, Bright steel products - Technical d
22、elivery conditions - Part 1: General 3 Terms and definitions For the purposes of this European Standard the terms and definitions given in EN 10277-1 apply. 4 Classification and designation 4.1 Classification All steels specified in this European Standard are classified as non-alloy quality steels.
23、4.2 Designation See EN 10277-1. 5 Information to be supplied by the purchaser See EN 10277-1. 6 Manufacturing process See EN 10277-1. 7 Requirements 7.1 Chemical composition 7.1.1 Cast analysis The chemical composition of the steel according to the cast analysis shall be as specified in Table 1. BS
24、EN 10277-3:2008EN 10277-3:2008 (E) 5 7.1.2 Product analysis The permissible deviations from the chemical composition as specified in Table 1 for cast analysis and the product analysis of the steel shall be as specified in Table 2. 7.2 Mechanical properties The mechanical properties shall be as speci
25、fied in: Table 3 for steels not intended for heat treatment, Table 4 for case-hardening steels, Table 5 for steels for quenching and tempering. 7.3 Options See Annex B of EN 10277-1. 8 Inspection and testing See EN 10277-1. 9 Marking See EN 10277-1. BS EN 10277-3:2008EN 10277-3:2008 (E) 6 Table 1 St
26、eel grades and chemical composition (cast analysis) Designation Chemical composition (% by mass) a Steel name Steel number Steel grade according to C Si max. Mn P max. S Pb Steels not intended for heat treatment 11SMn30 1.0715 EN 10087 0,14 0,05b 0,90 to 1,30 0,11 0,27 to 0,33 - 11SMnPb30 1.0718 EN
27、10087 0,14 0,05 0,90 to 1,30 0,11 0,27 to 0,33 0,20 to 0,35 11SMn37 1.0736 EN 10087 0,14 0,05b1,00 to 1,50 0,11 0,34 to 0,40 - 11SMnPb37 1.0737 EN 10087 0,14 0,05 1,00 to 1,50 0,11 0,34 to 0,40 0,20 to 0,35 Case hardening steels 10S20 1.0721 EN 10087 0,07 to 0,13 0,40 0,70 to 1,10 0,06 0,15 to 0,25
28、- 10SPb20 1.0722 EN 10087 0,07 to 0,13 0,40 0,70 to 1,10 0,06 0,15 to 0,25 0,20 to 0,35 15SMn13 1.0725 EN 10087 0,12 to 0,18 0,40 0,90 to 1,30 0,06 0,08 to 0,18 - Steels for quenching and tempering 35S20 1.0726 EN 10087 0,32 to 0,39 0,40 0,70 to 1,10 0,06 0,15 to 0,25 - 35SPb20 1.0756 EN 10087 0,32
29、to 0,39 0,40 0,70 to 1,10 0,06 0,15 to 0,25 0,15 to 0,35 36SMn14 1.0764 EN 10087 0,32 to 0,39 0,40 1,30 to 1,70 0,06 0,10 to 0,18 - 36SMnPb14 1.0765 EN 10087 0,32 to 0,39 0,40 1,30 to 1,70 0,06 0,10 to 0,18 0,15 to 0,35 38SMn28 1.0760 EN 10087 0,35 to 0,40 0,40 1,20 to 1,50 0,06 0,24 to 0,33 - 38SMn
30、Pb28 1.0761 EN 10087 0,35 to 0,40 0,40 1,20 to 1,50 0,06 0,24 to 0,33 0,15 to 0,35 44SMn28 1.0762 EN 10087 0,40 to 0,48 0,40 1,30 to 1,70 0,06 0,24 to 0,33 - 44SMnPb28 1.0763 EN 10087 0,40 to 0,48 0,40 1,30 to 1,70 0,06 0,24 to 0,33 0,15 to 0,35 46S20 1.0727 EN 10087 0,42 to 0,50 0,40 0,70 to 1,10 0
31、,06 0,15 to 0,25 - 46SPb20 1.0757 EN 10087 0,42 to 0,50 0,40 0,70 to 1,10 0,06 0,15 to 0,25 0,15 to 0,35 aElements not quoted in this table shall not be intentionally added to the steel without the agreement of the purchaser, other than for the purpose of finishing the heat. However, elements such a
32、s Te, Bi etc., may be added by the manufacturer for improving the machinability, if this has been agreed at the time of enquiry and order. bIf, by metallurgical techniques, the formation of special oxides is guaranteed, a Si-content of 0,10 to 0,40 % can be agreed. BS EN 10277-3:2008EN 10277-3:2008
33、(E) 7 Table 2 Permissible deviations between the product analysis and the limiting values given in Table 1 for the cast analysis Element Specified maximum content in the cast analysis % by mass Permissible deviationsa % by mass C 0,30 0,30 0,50 0,02 0,03 Si 0,05 0,05 0,40 + 0,01 + 0,03 Mn 1,00 1,00
34、1,70 0,04 0,06 P 0,06 0,06 0,11 + 0,008 + 0,02 S 0,33 0,33 0,40 0,03 0,04 Pb 0,35 + 0,03 - 0,02 a 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. Table 3 Mechanical properties of free-cutti
35、ng steels not intended for heat treatment Designation Mechanical propertiesaAs rolled and turned (+SH) Cold drawn (+C) Steel name Steel number Thicknessamm Hardnessb HBW RmMPa Rp 0,2c MPa min. RmcMPa A % min. 5 10 - - 440 510 to 810 6 10 16 - - 410 490 to 760 7 16 40 112 to 169 380 to 570 375 460 to
36、 710 8 40 63 112 to 169 370 to 570 305 400 to 650 9 11SMn30 11SMnPb30 11SMn37 11SMnPb37 1.0715 1.0718 1.0736 1.0737 63 100 107 to 154 360 to 520 245 360 to 630 9 aFor thicknesses 10 16 - - 390 490 to 740 8 16 40 107 to 156 360 to 530 360 460 to 720 9 40 63 107 to 156 360 to 530 295 410 to 660 10 10S
37、20 10SPb20 1.0721 1.0722 63 100 105 to 146 350 to 490 235 380 to 630 11 5 10 - - 450 560 to 840 6 10 16 - - 430 500 to 800 7 16 40 128 to 178 430 to 600 390 470 to 770 8 40 63 128 to 172 430 to 580 350 460 to 680 9 15SMn13 1.0725 63 100 125 to 160 420 to 540 265 440 to 650 10 aFor thicknesses 10 16
38、- - 400 590 to 830 7 - - - 490 700 to 900 11 16 40 154 to 201 520 to 680 360 560 to 800 8 380 600 to 750 16 455 650 to 850 12 40 63 154 to 198 520 to 670 340 530 to 760 9 320 550 to 700 17 400 570 to 770 13 35S20 35SPb20 1.0726 1.0756 63 100 149 to 193 500 to 650 300 510 to 680 9 320 550 to 700 17 3
39、85 550 to 750 14 5 10 - - 500 660 to 960 6 - - - 525 750 to 1 000 6 10 16 - - 440 620 to 920 6 - - - 520 740 to 990 6 16 40 166 to 222 560 to 750 390 600 to 900 7 420 670 to 820 15 505 720 to 970 8 40 63 166 to 219 560 to 740 360 580 to 840 8 400 640 to 790 16 475 680 to 930 9 36SMn14 36SMnPb14 1.07
40、64 1.0765 63 100 163 to 219 550 to 740 340 560 to 820 9 360 570 to 720 17 405 580 to 840 9 5 10 - - 550 700 to 960 6 - - - 595 850 to 1 000 9 10 16 - - 500 660 to 930 6 - - - 545 775 to 925 10 16 40 166 to 216 560 to 730 420 610 to 900 7 420 700 to 850 15 490 700 to 900 12 40 63 166 to 216 560 to 73
41、0 400 600 to 840 7 400 700 to 850 16 490 700 to 900 13 38SMn28 38SMnPb28 1.0760 1.0761 63 100 163 to 207 550 to 700 350 580 to 820 8 380 630 to 800 16 440 625 to 850 14 5 10 - - 600 760 to 1 030f5f- - - 595 850 to 1 000 9 10 16 - - 530 710 to 980f5f- - - 595 850 to 1 000 9 16 40 187 to 242 630 to 82
42、0 460 660 to 900f6f420 700 to 850 16 490 700 to 900 11 40 63 184 to 235 620 to 790 430 650 to 870 7 410 700 to 850 16 490 700 to 900 12 44SMn28 44SMnPb28 1.0762 1.0763 63 100 181 to 231 610 to 780 390 630 to 840 7 400 700 to 850 16 490 700 to 900 12 5 10 - - 570 740 to 980 5 - - - 595 850 to 1 000 8
43、 10 16 - - 470 690 to 930 6 - - - 560 800 to 950 9 16 40 175 to 225 590 to 760 400 640 to 880 7 430 650 to 800 13 490 700 to 850 10 40 63 172 to 216 580 to 730 380 610 to 850 8 370 630 to 780 14 490 700 to 850 11 46S20 46SPb20 1.0727 1.0757 63 100 166 to 211 560 to 710 340 580 to 820 8 370 630 to 78
44、0 14 455 650 to 850 11 aFor non-round products in the quenched and tempered condition, see EN 10277-1, Figure A.1. bFor thicknesses 5 mm the mechanical properties may be agreed at the time of enquiry and order. cThese values are also valid for the quenched and tempered + turned condition. dOnly for
45、information. eFor flats and special sections the yield strength (Rp0,2) may deviate by - 10 % and the tensile strength (Rm) by 10 %. fBy means of heavy drafting these steels may be supplied with a minimum tensile strength (Rm) of 920 MPa and a minimum elongation (A) of 4 %. gIn EN 10087, the term di
46、rect hardening was used. This term must be changed to quenching and tempering during the next revision of that standard. BS EN 10277-3:2008BS EN 10277-3:2008BSI389 Chiswick High RoadLondonW4 4ALBSI British Standards InstitutionBSI is the independent national body responsible for preparing British St
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