BS EN 10278-1999 Dimensions and tolerances of bright steel products《光亮钢产品的尺寸和公差》.pdf

1、| | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | BRITISH STANDARD BS EN 10278:1999 The Euro

2、pean Standard EN 10278:1999 has the status of a British Standard ICS 77.140.60 NO COPYING WITHOUT BSI PERMISSION EXCEPT AS PERMITTED BY COPYRIGHT LAW Dimensions and tolerances of bright steel productsThis British Standard, having been prepared under the direction of the Engineering Sector Committee,

3、 was published under the authority of the Standards Committee and comes into effect on 15 December 1999 BSI 12-1999 ISBN 0 580 35387 7 BS EN 10278:1999 Amendments issued since publication Amd. No. Date Comments National foreword This British Standard is the English language version of EN 10278:1999.

4、 Together with BS EN 10277 parts 1 to 5 this standard supersedes BS 970-3:1991 which is withdrawn. The UK participation in its preparation was entrusted to Technical Committee ISE/31, Wrought steels, which has the responsibility to: aid enquirers to understand the text; present to the responsible Eu

5、ropean committee any enquiries on the interpretation, or proposals for change, and keep the UK interests informed; monitor related international and European developments and promulgate them in the UK. A list of organizations represented on this committee can be obtained on request to its secretary.

6、 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 entitled “International Standards Correspondence Index”, or by using the “Find” facility of the BSI Standards Elec

7、tronic 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 application. Compliance with a British Standard does not of itself confer immunity from legal obligations. Summary of pages This d

8、ocument comprises a front cover, an inside front cover, the EN title page, pages 2 to 7 and a back cover. The BSI copyright notice displayed in this document indicates when the document was last issued.CEN European Committee for Standardization Comite Europe en de Normalisation Europa isches Komitee

9、 fu r Normung Central Secretariat: rue de Stassart 36, B-1050 Brussels 1999 CEN All rights of exploitation in any form and by any means reserved worldwide for CEN national Members. Ref. No. EN 10278:1999 E EUROPEAN STANDARD EN 10278 NORME EUROPE ENNE EUROPA ISCHE NORM October 1999 ICS 77.140.60 Engl

10、ish version Dimensions and tolerances of bright steel products Dimensions et tole rances des produits en acier transforme a froid Mae und Grenzabmae von Blankstahlerzeugnissen This European Standard was approved by CEN on 3 September 1999. CEN members are bound to comply with the CEN/CENELEC Interna

11、l 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 standards may be obtained on application to the Central Secretariat or to any CEN member.

12、This European Standard exists 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 versions. CEN members are

13、 the national standards bodies of Austria, Belgium, Czech Republic, Denmark, Finland, France, Germany, Greece, Iceland, Ireland, Italy, Luxembourg, Netherlands, Norway, Portugal, Spain, Sweden, Switzerland and United Kingdom.Page 2 EN 10278:1999 BSI 12-1999 Foreword This European Standard has been p

14、repared 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 identical text or by en

15、dorsement, 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. This European Standard is considered to

16、 be a supporting standard to those applications and product standards which in themselves support an essential safety requirement of a New Approach Directive and which make reference to this European Standard. According to the CEN/CENELEC Internal Regulations, the national standards organizations of

17、 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 United Kingdom. Contents Page Foreword 2 1 Scope

18、 3 2 Normative references 3 3 Definitions 3 4 Information to be supplied by the purchaser 3 4.1 Mandatory information 3 4.2 Supplementary information 3 5 Condition of delivery 3 5.1 Finished condition 3 5.2 End condition 3 6 Tolerances on dimensions and shape 4 6.1 Tolerances on dimensions (diameter

19、, thickness, width) 4 6.2 Types of length and length tolerances 4 6.3 Out of round 4 6.4 Straightness tolerance 4 6.5 Edges of non-round bars 4 7 Inspection and testing 4 Annex A (normative) Supplementary or special requirements 7 Annex B (normative) Methods for evaluating straightness 7Page 3 EN 10

20、278:1999 BSI 12-1999 1 Scope This European Standard applies to bright steel products in the drawn, turned or ground condition delivered in straight lengths. It does not cover cold rolled products and cut lengths produced from strip or sheet by cutting. 2 Normative references This European Standard i

21、ncorporates by dated or undated reference, provisions from other 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

22、European Standard only when incorporated in it by amendment or revision. For undated references the latest edition of the publication referred to applies. EN 10079, Definition of steel products. EN 10088-3, Stainless steels Part 3: Technical delivery conditions for semi-finished products, bars, rods

23、 and sections for general purposes. EN 10204, Metallic products Types of inspection documents. EN 10277-1, Bright steel products Technical delivery conditions Part 1: General. EN 10277-3, Bright steel products Technical delivery conditions Part 3: Free-cutting steels. ISO 286-2, ISO system of limits

24、 and fits Part 2: Tables of standard tolerance grades and limit deviations for holes and shafts. 3 Definitions For the purpose of this European Standard the following definition applies in addition to the definitions in EN 10079 for drawn products. 3.1 out of round difference between the least and g

25、reatest dimension measured across the pairs of opposing points at a common cross-section 4 Information to be supplied by the purchaser 4.1 Mandatory information The following information shall be supplied by the purchaser at the time of enquiry and order: a) the quantity (mass, number of bars) to be

26、 delivered; b) the shape of the product (e.g. round, hexagon, square, flat); c) the number of this European Standard (EN 10278); d) the dimensions and tolerances on dimensions and shape; e) reference to the material standard including the number of the part (e.g. EN 10277-3); f) steel name or steel

27、number; g) the finished condition (see 5.1); h) the class of surface quality (see EN 10277-1) where appropriate. EXAMPLE 1 2 t rounds EN 102782 20 h93 stock 6 000 EN 10277-3-38SMn28+C2 class 3 or 2 t rounds EN 102782 20 h93 stock 6 000 EN 10277-3-1.0760+C2 class 3 EXAMPLE 2 10 t rounds EN 102782 50

28、h83 stock 3 000 EN 10088-3-X5CrNi18-10+2P2 class 2 or 10 t rounds EN 102782 50 h83 stock 3 000 EN 10088-3-1.4301+2P2 class 2 4.2 Supplementary information The following supplementary information may be supplied by the purchaser and as agreed with the manufacturer: a) disposition of tolerances (see A

29、.1); b) end condition (see A.2); c) straightness (see 6.4); d) if required, the type of inspection document in accordance with EN 10204. 5 Condition of delivery 5.1 Finished condition The steel product shall be delivered in one or a combination of the following finished conditions with or without he

30、at treatment: a) drawn, symbol +C; b) turned, symbol +SH; c) ground, symbol +SL; d) polished, symbol +PL. 5.2 End condition Unless otherwise agreed at the time of enquiry and order, the method of cutting shall be left to the discretion of the manufacturer. Where specified at the time of enquiry and

31、order, end conditions may be specified in accordance with A.2.Page 4 EN 10278:1999 BSI 12-1999 Table 2 Tolerance classes Nominal dimension Tolerance class to ISO 286-2 1) mm h6 h7 h8 h9 h10 h11 h12 1 to#3 0,006 0,010 0,014 0,025 0,040 0,060 0,100 3 to#6 0,008 0,012 0,018 0,030 0,048 0,075 0,120 6 to

32、#10 0,009 0,015 0,022 0,036 0,058 0,090 0,150 10 to#18 0,011 0,018 0,027 0,043 0,070 0,110 0,180 18 to#30 0,013 0,021 0,033 0,052 0,084 0,130 0,210 30 to#50 0,016 0,025 0,039 0,062 0,100 0,160 0,250 50 to#80 0,019 0,030 0,046 0,074 0,120 0,190 0,300 80 to#120 0,022 0,035 0,054 0,087 0,140 0,220 0,35

33、0 120 to#180 0,025 0,040 0,063 0,100 0,160 0,250 0,400 180 to#200 0,029 0,046 0,072 0,115 0,185 0,290 0,460 1) The above deviation values are negatively disposed about the nominal dimension. For example a 20 mm nominal diameter having a tolerance class h9 is 20 mm + 0,20,052 mm or 19,948/20,000 mm 6

34、 Tolerances on dimensions and shape 6.1 Tolerances on dimensions (diameter, thickness, width) 6.1.1 Tolerances on dimensions shall be as specified by the purchaser at the time of enquiry and order and shall be in accordance with ISO 286-2 as set out in Table 1. 6.1.2 Unless otherwise specified at th

35、e time of enquiry and order (see 6.3) tolerances on dimensions shall be as follows: a) for drawn round bars, other than those under e), or turned bars: h10 according to Table 2; b) for hexagon and square drawn bars: h11 for dimensions#80 mm, h12 for dimensions 80 mm, according to Tables 1 and 2; c)

36、for drawn flats: in accordance with Table 3; d) for ground products: h9 in accordance with Tables 1 and 2; e) for drawn round bars in the final quenched and tempered condition: h11, according to Tables 1 to 3. 6.1.3 Where specified by the purchaser at the time of enquiry and order, the disposition t

37、olerances specified in Table 2 shall be in accordance with A.1. 6.2 Types of length and length tolerances Unless otherwise agreed at the time of enquiry and order, the length and the tolerance on length shall be as specified in Table 5. 6.3 Out of round Maximum deviation from “out of round” shall be

38、 not more than half the specified tolerance and in any case never above the upper limit of the tolerance. 6.4 Straightness tolerance Where specified at the time of enquiry and order and in cases of dispute, an agreed number of bars shall be evaluated for straightness in accordance with one of the me

39、thods specified in annex B and the tolerances specified in Table 4 shall apply. 6.5 Edges of non-round bars Non-round bars (i.e. square, hexagon and flat) in widths#150 mm may have an undefined profile within a distance of 0,2 mm of the hypothetical edge, flats in widths 150 mm within a distance of

40、0,5 mm, unless otherwise agreed. For widths 150 mm the corner profile may be undefined within a distance of 0,5 mm of the hypothetical edge, unless sharp corners have specifically been ordered. 7 Inspection and testing A sufficient number of samples shall be inspected for dimensional compliance. Dim

41、ensional inspection shall be carried out as follows: a) for round bars: not less than 150 mm from the end of the bar; b) for round bars cut to length: not less than 10 mm from the end of the bar; c) for shapes other than round: not less than 25 mm from the end of the bar. Table 1 Tolerance class acc

42、ording to finished condition Finished condition Tolerance class to ISO 286-2 h6 h7 h8 h9 h10 h11 h12 Drawn R R R, S, H R, S, H Turned R R R R Ground RRRRRR R Polished RRRRRR R R = round, S = square, H = hexagon.Page 5 EN 10278:1999 BSI 12-1999 Table 3 Tolerance for drawn flats Width Deviation ISO 28

43、6-2 class mm mm mm #18 +0 20,11 h11 18#30 +0 20,13 h11 30#50 +0 20,16 h11 50#80 +0 20,19 h11 80#100 +0 20,22 h11 100#150 +0,50 20,50 150#200 +1,00 21,00 200#300 +2,00 22,00 300#400 +2,50 22,50 Thickness Deviation 1) 2) mm mm 3#6 20,075 h11 6#10 20,090 h11 10#18 20,11 h11 18#30 20,13 h11 30#50 20,16

44、h11 50#60 20,19 h11 60#80 20,30 h12 80#100 20,35 h12 1) All deviations are +0. 2) The tolerances in the table apply to low carbon (C# 0,20 %) and low carbon free-cutting steels only. For all other steels, deviation is increased by 50 %. Table 4 Deviation from straightness 1) Product form Steel group

45、 Nominal dimension Deviation max. mm Rounds 75 mm 1,5 $0,25 % C, alloy steels, quenched and tempered steels d 75 mm 2,5 Stainless steels, ball and roller bearing steels, tool steels d 75mm 1,5 Flats w 120 mm on width: 0,25 % C 1,5 $0,25 % C, alloy steels, quenched and tempered steels 1,5 Stainless s

46、teels, ball and roller bearing steels, tool steels 1,5 w 120 mm on thickness: 0,25 % C 1,5 $0,25 % C, alloy steels, quenched and tempered steels 2,0 Stainless steels, ball and roller bearing steels, tool steels 2,0Page 6 EN 10278:1999 BSI 12-1999 Table 4 Deviation from straightness 1) (continued) Pr

47、oduct form Steel group Nominal dimension Deviation max. mm Flats (continued) w$ 120 mm on width: 25 mm: the percentage is 10 % maximum, with the same restriction on the minimum length. If specially stated at the time of enquiry and order, the bundles are delivered without any short bars.Page 7 EN 10

48、278:1999 BSI 12-1999 Annex A (normative) Supplementary or special requirements NOTE One or more of the following supplementary or special requirements may be agreed upon at the time of enquiry and order (see 4.2). The details of these requirements may be agreed upon between the manufacturer and the

49、purchaser at the time of enquiry and order if necessary. A.1 Disposition of tolerances The disposition of tolerances about the nominal dimension of the product other than specified in 6.1.1 shall be one of the following as specified by the purchaser at the time of enquiry and order: a) values all positive, i.e. + and lower tolerances all zero, i.e.20; b) values equally disposed about the nominal dimension. A.2 End condition The ends of the product shall be as specified by the purchaser at the time of enquiry and order, e.g. chamfe