1、DEUTSCHE NORM December 1999 I Dimensions and tolerances of bright steel products I DIN - I EN10278 English version of DIN EN 10278 I ICs 77.1 40.60 Mae und Grenzabmae von Blankstahlerzeugnissen Supersedes DIN 174, June 1969 edition, DIN 175, October 1981 edition, DIN 176, February 1972 edition, DIN
2、178, June 1969 edition, DIN 668 to DIN 671, and DIN 59360 and DIN 59361, October 1981 editions. European Standard EN 10278 : 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 23. The responsible German body inv
3、olved in its preparation was the Normenausschuss Eisen und Stahl (Steel and Iron Standards Committee). Amendments DIN 174, June 1969 edition, DIN 175, October 1981 edition, DIN 176, February 1972 edition, DIN 178, June 1969 edition, DIN 668 to DIN 671, and DIN 59360 and DIN 59361, October 1981 editi
4、ons, have been super- seded by the specifications of DIN EN 10287. Previous editions DIN 174: 1928-01, 1939-09, 1943-03, 1959-05, 1969-06; DIN 175: 1923-1 O, 1940-1 O 1943-02, 1959-05, 1981 -1 O; DIN 176: 1925-04, 1939-09, 1959-05, 1972-02; DIN 178: 1926-04, 1939-09, 1947-09, 1959-05, 1969-06; DIN 6
5、67: 1923-1 O; DIN 668: 1923-1 O, 1925-1 O, 1932-05, 1938-1 O, 1943-02, 1959-05, 1981 -1 O; DIN 669: 1923-1 O, 1930-09, 1959-05, 1981 -1 O; DIN 670 : 1939-09, 1959-05, 1981 -1 O; DIN 671 : 1939-09, 1943-02, 1959-05, 1981 -1 O; DIN 59360: 1969-06, 1973-09, 1981 -1 O; DIN 59361 : 1969-06, 1981-10. EN c
6、omprises 13 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 10278 : 1999-1 English price group
7、08 Sales No. 1108 06.00 EUROPEAN STANDARD NORME EUROPENNE EUROPISCHE NORM EN 10278 October 1999 ICs 77.140.60 English version Dimensions and tolerances of bright steel products Dimensions et tolrances des produits en acier transform froid Mae und Grenzabmae von Blank- stahlerzeugnissen This European
8、 Standard was approved by CEN on 1999-09-03. CEN members are bound to comply with the 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
9、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, French, German). A version in any other language made by translation under the responsibility of a CEN member into its own langu
10、age 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, Denmark, Finland, France, Germany, Greece, Iceland, Ireland, Italy, Luxembourg, the Netherlands, Norway, Portugal, Spain, S
11、weden, Switzerland, and the United Kingdom. CEN European Committee for Standardization 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 C
12、EN national members. Ref. No. EN 10278 : 1999 E Page 2 EN 10278 : 1999 Contents 1 2 3 4 4.1 4.2 5 5.1 5.2 6 6.1 6.2 6.3 6.4 6.5 7 Foreword Scope Normative references Definitions Information to be supplied by the purchaser Mandatory information Supplementary information Condition of delivery Finished
13、 condition End condition Tolerances on dimensions and shape Tolerances on dimensions (diameter, thickness, width) Types of length and length tolerances Out of round Straightness tolerance Edges of non-round bars Inspection and testing Annex A (normative): Supplementary or special requirements Annex
14、B (normative): Methods for evaluating straightness Page 3 4 4 4 5 5 6 6 6 6 6 6 7 7 7 7 7 12 13 Page 3 EN 10278 : 1999 Foreword This European Standard has been prepared by Technical Committee ECISSTTC 23 “Steels for heat treatment, alloy steels and free-cutting steels - Qualities and dimensions”, th
15、e 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 endorsement, at the latest by April 2000, and conflicting national standards shall be withdrawn at the latest by April 2000. This European
16、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 be a supporting standard to those application and product standards which in themselves support an essential safety requirement of a New
17、 Approach Directive and which make reference to this European Standard. According to the CENKENELEC Internal Regulations, the national standards organizations of the following countries are bound to implement this European Standard: Austria, Belgium, Czech Republic, Denmark, Finland, France, Germany
18、, Greece, Iceland, Ireland, Italy, Luxembourg, Netherlands, Norway, Portugal, Spain, Sweden, Switzerland and the United Kingdom. Page 4 EN 10278 : 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
19、cover cold rolled products and cut lengths produced from strip or sheet by cutting. 2 Normative references This European Standard incorporat-s by dat cl or undated reference, provisions from other publications. These normative references are cited at the appropriate places in the text and the public
20、ations 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 10079 EN 1
21、0088-3 EN 10204 EN 10277-1 EN 10277-3 IS0 286-2 Definition of steel products Stainless steels - Part 3: Technical delivery conditions for semi-finished products, bars, rods and sections for general purposes Metallic products - Types of inspection documents Bright steel products - Technical delivery
22、conditions - Part 1 : General Bright steel products - Technical delivery conditions - Part 3: Free- cutting steels IS0 system of limits 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 followi
23、ng definition applies in addition to the definitions in EN 10079 for drawn products. 3.1 Out of round: The difference between the least and greatest dimension measured across the pairs of opposing points at a common cross section. Page 5 EN 10278 : 1999 4 Information to be supplied by the purchaser
24、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 delivered; b) the shape of the product (e. g. round, hexagon, square, flat); c) the number of this European Standard (EN 10278); d) th
25、e 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 number; g) the finished condition (see 5.1); h) the class of surface quality (see EN 10277-1) where appropriate; EXAMPLE 1: 2t rounds
26、 EN 10278 - 20 h9 x stock 6000 EN 10277-3-38SMn28+C - class 3 or 2t rounds EN 10278 - 20 h9 x stock 6000 EN 10277-3-1.0760+C - class 3 EXAMPLE 2: 1Ot rounds EN 10278 - 50 h8 x stock 3000 EN 10088-3-X5CrNil8-10+2P - class 2 or 1 Ot rounds EN 10278 - 50 h8 x stock 3000 EN 10088-3-1.4301 +2P - class 2
27、Page 6 EN 10278 : 1999 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.1); b) end condition (see A.2); c) straightness (see 6.4); d) if required, the type of inspection doc
28、ument in accordance with EN 10204. 5 Condition of delivery 5.1 Finished condition The steel product shall be delivered in one or combination of the following finished conditions with or without heat treatment: a) drawn, symbol +C; b) turned, symbol +SH; c) ground, symbol +SL; d) polished, symbol +PL
29、. 5.2 End condition Unless otherwise agreed at the time of enquiry and order, the method of cutting shall be left at the discretion of the manufacturer. Where specified at the time of enquiry and order, end conditions may be specified in accordance with A.2. 6 Tolerances on dimensions and shape 6.1
30、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 IS0 286-2 as set out in table I. 6.1.2 Unless otherwise specified at the time of enquiry and order (see 6.3) to
31、lerances on dimensions shall be as follows: a) for drawn round bars, other than those under e), or turned bars: hl O to table 2; Page 7 EN 10278 : 1999 b) for hexagon and square drawn bars: hl 1 for dimensions I 80 mm, h12 for dimensions 80 mm according to tables 1 and 2; c) for drawn flats: in acco
32、rdance 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: hl I. 6.1.3 Where specified by the purchaser at the time of enquiry and order, the disposition tolerances specified in table 2 shall be in accordan
33、ce 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 not more than half the specified tolerance in any ca
34、se 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 methods specified in annex B and the tolerances specified i
35、n table 4 shall apply. 6.5 Edges of non-round bars Non-round bars (i. e. square, hexagon and flat) in widths 5 150 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 0,5 mm, unless otherwise agreed. For widths 150 mm the
36、 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. Page 8 EN 10278 : 1999 h6 R R Dimensional inspection shal
37、l 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 according to finished cond
38、ition h7 h8 h9 hl O hl 1 hl 2 R R R, S, H R, S, H R R R R R R R R R R R R R R R R Finished condition hl 1 0,060 0,075 0,090 0,110 0,130 0,160 0,190 0,220 0,250 0,290 I Tolerance class to IS0 286-2 I hl 2 0,100 0,120 0,150 0,180 0,210 0,250 0,300 0,350 0,400 0,460 Drawn Turned Ground Polished I R = r
39、ound, S = square, H = hexagon I Table 2: Tolerance classes Nominal I Tolerance class to IS0 286-2” dimension mm h10 0,040 3toi6 0,048 6 to i 10 0,058 10 to i 18 0,070 18to i 30 0,084 30 to s 50 0,100 50 to i 80 0,120 80 to s 120 O, 140 120 to 5 180 O, 1 60 180 to 50 s 80 Table 3: Tolerance for drawn
40、 flats I +O I -0,19 I hll Width mm Deviation mm mm +O -0,ll +O -0,13 +O -0,16 IS0 286-2 Class hl 1 hl 1 hl 1 s 18 + l,oo + 2,oo 18 30 80 150 5 200 200 2 300 300 s 400 Thickness mm I mm F3-5 6 -0,075 I hll 1610r 18 -0,ll I hll llss 30 -0,13 I hll 50 -0,16 I hll I 50 2 60 -0,19 I hll I 60 I 80 -0,30 I
41、 h12 Lo 75mm d 75 mm 2 0,25 Yo Cl alloy steels, quenched and tempered steels stainless steels, ball and roller bearing steels, tool steels d 75 mm -1ats , w 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, th
42、e bundles are delivered without any short bars. Page 12 EN 10278 : 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
43、may be agreed upon between the manufacturer and the purchaser at the time of enquiry and order if necessary. A.l 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 purchase
44、r at the time of enquiry and order: a) values all positive, i. e. + and lower tolerances all zero, i. e. -0 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. chamferring, fa
45、cing. Page 13 EN 10278 : 1999 Annex B (normative) Methods for evaluating straightness B.O Scope This annex sets out two methods for the evaluation of the straightness of bright steel bars as provided for in 6.4. The method set out in B.l is the preferred method and B.2 is an alternative method. The
46、choice of method shall be as agreed at the time of enquiry and order. B.l Preferred method B.l .I The bar shall be supported on a suitable surface so as to eliminate or minimise sagging. B.1.2 A 1 m long straight edge shall be placed on the surface of the bar at any position along its length. No par
47、t of the straight edge shall be within 150 mm of the ends of the bar. B.1.3 Straightness shall be determined by measuring the maximum gap between the bar and the straight edge by suitable means, e. g. feeler gauge. The bar shall be deemed straight where the maximum gap does not exceed the values spe
48、cified in table 4. 8.2 Alternative method for round bars B.2.1 The round bar shall be supported on a sufficient number of centres placed 1 m apart. 8.2.2 Straightness shall be measured by means of a suitable dial or indicator gauge place at any position between the supporting centres. B.2.3 The bar shall be deemed to be straight when rotating the bar through 360“ the indicated reading (TIR) is not greater than twice the deviation specified in table 4.
