ISO 7773-1983 Magnesium alloys Round bars and tubes Dimensional tolerances《镁合金 圆棒材和管材 尺寸偏差》.pdf

1、International Standard INTERNATIONAL ORGANIZATION FOR STANOARDlZATION*MEXJWiAPO/lHAR OPrAHHJAUHR l-l0 CTAHAAPTH3AUHWMRGANISATlON INTERNATIONALE OE NORMALISATION Magnesium alloys - Round bars and tubes - Dimensional tolerances Alliages de magntkium - Barres et tubes de section circulaire - Tokrances

2、dimensionnelles First edition - 1993-09-01 UDC 999.721.5-422.2 Ref. No. IS0 7773-1993 (E) Descriptors : metal products, metal bars, metal tubes, magnesium alloys, dimensions, dimensional tolerances. Price based on 3 pages Copyright International Organization for Standardization Provided by IHS under

3、 license with ISONot for ResaleNo reproduction or networking permitted without license from IHS-,-,-Foreword IS0 (the International Organization for Standardization) is a worldwide federation of national standards bodies (IS0 member bodies). The work of developing International Standards is carried

4、out through IS0 technical committees. Every member body interested in a subject for which a technical committee has been authorized 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. Draf

5、t International Standards adopted by the technical committees are circulated to the member bodies for approval before their acceptance as International Standards by the IS0 Council. International Standard IS0 7773 was developed by Technical Committee ISO/TC 79, Light metals and their alloys, and was

6、 circulated to the member bodies in May 1992. It has been approved by the member bodies of the following countries : Austria Hungary Canada Iraq China Italy Egypt, Arab Rep. of Korea, Rep. of France Norway Germany, F.R. Romania South Africa, Rep. of Spain Sweden United Kingdom USSR No member body ex

7、pressed disapproval of the document. 0 International Organization for Standardization, 1993 0 Printed in Switzerland Copyright International Organization for Standardization Provided by IHS under license with ISONot for ResaleNo reproduction or networking permitted without license from IHS-,-,-INTER

8、NATIONAL STANDARD IS0 7773-1993 (E) Magnesium alloys - Round bars and tubes - Dimensional tolerances 1 Scope and field of application This International Standard specifies dimensional tolerances for round bars and tubes made from magnesium alloys. For bars of diameter less than 50 mm, a further sizi

9、ng operation at room temperature may be carried out, in order to obtain closer dimensional tolerances. The products may be manufactured from any wrought magnesium alloys, especially the magnesium-aluminium-zinc alloys and the magnesium-zirconium-zinc alloys specified in IS0 3116). 3. Dimensional tol

10、erances 2 Manufacturing method and delivery condition 3.1 Bars The products covered by this International Standard are obtained by extrusion, followed by straightening where necessary, without any thermal treatment. 3.1 .I Diameter See table 1. Table 1 Values in millimetres Tolerance Specified diame

11、ter 4 to IO IO,1 to 16 16,l to 30 30,l to 50 51 to 80 Extruded and straightened bars + 03 0 + 0,6 0 + 0,7 0 + 0,9 0 + I,2 0 Extruded and sized bars 0 - 0,09 0 - 0,ll 0 - 0,13 0 - 0,16 81 to 120 + I,6 0 I) IS0 3116, Wrought magnesium alloys - Chemical composition and mechanical properties. 1 Copyrigh

12、t International Organization for Standardization Provided by IHS under license with ISONot for ResaleNo reproduction or networking permitted without license from IHS-,-,-IS0 7773-1993 (E) 3.1.2 Length See table 2. Table 2 Diameter Random lengths -_.- W 2OOOto6000 Fixed lengths 6000 + 10 Tolerance 0

13、Limits to be agreed between the purchaser and the supplier To be agreed between the purchaser and the supplier L 3.1.3 Straightness The maximum deviation shall be 0,2 % of the length of wave-undulation. 3.2 Tubes 3.2.1 Outside diamater See table 3. Table 3 Values in millimetres I Nominal outside Tol

14、erance diameter on mean diameter on specified diameter I 10 to 30 I + 0,25 I iI 0.50 I 30 to 50 I f 0,35 I + 0.60 I 50 to 80 I f 0,45 I f 0,80 I 80to120 I f 0,65 I * 1.20 NOTES 1 The circularity tolerances (difference between maximum outside diameter and minimum outside diameter in a given section)

15、are included in the tolerances for specified diameter. 2 The mean diameter is the average of two diameters measured at 90” to each other in the same section at any point along the length. 2 Copyright International Organization for Standardization Provided by IHS under license with ISONot for ResaleN

16、o reproduction or networking permitted without license from IHS-,-,-IS0 7773-1993 (E) 3.2.2 Wall thickness See table 4. Table 4 Nominal wall thickness mm 1 to 2 inclusive Tolerance % of nominal thickness on mean thickness on actual thickness f 10 f 13 2 to 3 inclusive I f 8 I * 11 I 73 * 7 f 10 NOTE

17、S 1 The eccentricity tolerances (difference between maximum wall thickness and minimum wall thickness in a given section) are included in the tolerances for specified wall thickness. 2 The mean thickness is the average of the results of any two diametrically opposed thickness measurements. 3.2.3 Len

18、gth See table 5. Table 5 Values in millimetres Outside diameter, D D!X !3080 80 D 120 Random lengths 200Oto8000 2000to6000 Fixed lengths 6000 Tolerance + r Tolerance + A To be agreed between the purchaser and the supplier Fixed lengths Limits to be agreed between the purchaser and the 76000 supplier 3.2.4 Straightness The maximum deviation shall be 0,2 % of the length of wave-undulation. Copyright International Organization for Standardization Provided by IHS under license with ISONot for ResaleNo reproduction or networking permitted without license from IHS-,-,-