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1、INTERNATIONAL STANDARD 657/V INTERNATIONAL ORGANIZATION FOR STANDARDIZATION.MEYHAPOHAII oPrAHki3Awfl no CTAHLIAPTCAUAH.ORGANSATION NTERNATIONALE DE NORMALISATION Hot-rolled steel sections - Part V : Equal-leg angles and unequal-leg angles - Tolerances for metric and inch series Profiks lamirk ii cha
2、ud - Pat-tie V : CorniSres 5 ailes &gales et ii ailes in&gales - Tolkances pour les skies m&rique et inch First edition - 1976-10-15 UDC 669.14-423 : 531.7 Ref. No. IS0 657/V-1976 (E) Descriptors : iron and steel products, hot-rolled products, metal sections, angle iron, specifications, dimensions,
3、dimensional tolerances, form tolerances. Price based on 3 pages FOREWORD IS0 (the International Organization for Standardization) is a worldwide federation of national standards institutes (IS0 Member Bodies). The work of developing International Standards is carried out through IS0 Technical Commit
4、tees. Every Member Body interested in a subject for which a Technical Committee has been set up has the right to be represented on that Committee. International organizations, governmental and non-governmental, in liaison with ISO, also take part in the work. Draft International Standards adopted by
5、 the Technical Committees are circulated to the Member Bodies for approval before their acceptance as International Standards by the IS0 Council. International Standard IS0 657/V was drawn up by Technical Committee ISO/TC 17, Steel, and was circulated to the Member Bodies in March 1975. It has been
6、approved by the Member Bodies of the following countries : Austria Brazil Bulgaria Chile Czechoslovakia Denmark Egypt, Arab Rep. Finland France Germany of Hungary India Iran Ireland Italy Mexico Netherlands New Zealand Norway Poland Portugal Romania South Africa, Rep. of Spain Sweden Switzerland Tur
7、key United Kingdom U.S.S.R. Yugoslavia The Member Bodies of the following countries expressed disapproval of the document on technical grounds : Austria Canada Belgium Japan U.S.A. 0 International Organization for Standardization, 1976 l Printed in Switzerland INTERNATIONAL STANDARD ISO 657/V-1976 (
8、E) Hot-rolled steel sections - Part V : Equal-leg angles and unequal-leg angles - Tolerances for metric and inch series 1 SCOPE AND FIELD OF APPLICATION This international Standard specifies metric and inch dimensional tolerances applicable to hot-rolled steel angles having either equal or unequal l
9、eg lengths in accordance with the metric dimensions of ISO/R 657/l and ISO/R 657/ll or the inch dimensions of ISO/R 657/ill and ISO/R 657/l/. 2 LEG LENGTH TOLERANCE Tolerances on leg length shall be as specified in table 1. 3 THICKNESS TOLERANCE Tolerances on thickness of equal- and unequal-leg angl
10、es shall be as specified in table 2. 4 CUTTING TOLERANCE FOR LENGTH Normal and fine tolerances for lengths of angles having equal or unequal legs shall be as specified in tables 3 and 4, respectively. 5 STRAIGHTNESS 5.1 The maximum permissible camber for equal- and unequal-leg angles shall be as spe
11、cified in table 5. 5.2 The camber shall be measured as shown in figure 1. 6 OUT-OF-SQUARE 6.1 The legs shall be perpendicular to each other within a maximum deviation at the end as specified in table 6. 6.2 The deviation shall be measured at the end of the leg (see figure 2). 7 TOLERANCE ON MASS Whe
12、re tolerance on mass per unit length is to be specified as an overall controlling tolerance, such provision should be included in the appropriate national standard. 1 -,-,- IS0 657/V-1976 (E) TABLE 1 - Length tolerance Metric series Inch series Leg length ) Leg length ) Tolerance Tolerance over up t
13、o and including over up to and including mm mm mm in in in - 50 + I,0 - 2 f 0.04 50 100 c I,5 2 4 c 0.06 100 150 f 2,0 4 6 + 0.08 150 200 f 3.0 6 8 f 0.12 I) For unequal-leg angles take the longer leg length as the reference. TABLE 2 - Thickness tolerance Metric series Inch series Leg length1 ) Leg
14、length1 ) Tolerance Tolerance over up to and including over up to and including mm mm mm in in in - 50 f 0.5 - 2 i- 0.02 50 100 t 0,8 2 4 2 0.03 100 150 f 1.0 4 6 k 0.04 150 200 f I,2 6 8 f 0.05 I) For unequal-leg angles take the longer leg length as the reference. NOTE - For angles having a leg len
15、gth exceeding 75 mm (3 in), a tolerance on mass of f 2,5 % of the mass per unit length may be specified in lieu of thickness tolerance. The masses per unit length of angles are given in the relevant parts of ISO/R 657 (see clause 1). TABLE 3 - Normal cutting tolerance on length Metric series Inch se
16、ries Length Tolerance Length Tolerance All lengths + 100 mm All lengths f 4 in TABLE 4 - Fine cutting tolerance on length Metric series Inch series Length Length Tolerance Tolerance over up to and including over up to and including m m mm ft ft in - 12 + 75 - 0 40 f3 0 12 + 100 0 40 +4 - 0 2 -,-,- I
17、S0 657/V-1976 (E) TABLE 5 -Camber Metric series Leg length ) Inch series Leg length ) I over up to and including Straightness tolerance over up to and including Straightness tolerance mm 50 mm 150 0.4 % of length in 2 in 6 0,4 % of length I 150 200 0.25 % of length 6 8 0,25 % of length I) For unequa
18、l-leg angles take the longer leg length as the reference. Length of angle FIGURE 1 - Measurement of camber TABLE 6 -Out-of-square Metric series Inch series Leg length ) Deviation Leg length 1) Deviation up to and including max. over over up to and including max. mm mm mm in in in - - 50 1 ,o 2 0.04 50 100 w 2 4 0.08 100 200 3,O 4 8 0.12 I) For unequal-leg angles take the longer leg length as the reference. FIGURE 2 - Measurement of deviation 3 -,-,-