BS 6104-2-1983 Mechanical Properties of Fasteners Part 2 Nuts with Specified Proof Load Values - Discuz! Board
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8D9502CCA4854BB4B9F455F7F5F26916 |
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文件大小(MB)： |
1.24 |
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页数： |
15 |
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日期： |
2024-6-23 |
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BS 6104: Part2:1983,UDC 621.882.3:620.17,. British Standards Institution. No part,of this publication may be photocopied,or otherwise reproduced withou+ the,prior permission in writing of BSI.,British Standard,Mechanical properties of fasteners,Part 2. Specification for nuts with,specified proof load values,Caracteristiques mecaniques des elements de fixation,Partie 2. Specification pour les ecrous ayant une charge d'epreuve specifiee,Meehanische Eigenschaften von Befestigungsteilen,Teil 2. Spezifikation fur Muttern mit vorgeschriebenen Pruflastwerten,British Standards Institution,BS6104 : Part2 : 1983,Contents,Page Page,Foreword Inside front cover,Committees responsible Back cover,Specification,1. Scope 1,2. Designation system 1,3. Materials 2,4. Mechanical properties 2,5. Heights of hexagon nuts 4,6. Test methods 6,7, Marking 7,Appendix,A. Stripping strength of bolt/nut assemblies 9,■ Tables,1. Designation system for nuts with nominal,heights > 0,8 D 1,2. Designation system and proof load stresses for,nuts with nominal heights > 0,5 Z? < 0,8 D 2,3. Minimum bolt stress when stripping occurs 2,4. Limits of chemical composition 2,5. Mechanical properties (coarse thread) 3,Foreword,This British Standard has been prepared under the direction,of the Mechanical Engineering Standards Committee. It is,one of a series of specifications, of which the full list is as,follows:,Part 1. Specification for bolts, screws and studs,Part 2. Specification for nuts with specified proof,load values,Part 3. Specification for set screws and similar threaded,fasteners not under tensile stresses.,This Part of this standard is based on ISO 898/2-1980,fMechanical properties of fasteners - Part 2: Nuts with,specified proof load values' published by the International,Organization for Standardization (ISO). With the following,major exceptions, its technical content agrees with,ISO 898/2:,All information concerning nominal thread diameters,above 39 mm has been excluded to maintain alignment,with Part 1 of this standard.,6. Heights of hexagon nuts 4,7. Proof load values (coarse thread) 5,8. Dimensions of clearance holes in mandrel,support 7,9. Marking symbols for nuts with nominal,heights > 0.8 D 8,10. Marking symbols for nuts with nominal,heights > 0.5 D and < 0.8 D 8,11. Property classes for bolts and screws 11,12. Nut designs and property classes 11,13. Influence of the thread tolerance upon the,test load 11,Figures,1. Axial tensile test 6,2. Axial compressive test 6,3. Examples of marking with designation symbol 7,4. Examples of marking with code symbol,(clock-face system) 7,5. Left-hand thread marking 7,6. Alternative left-hand thread marking for bar,turned nuts 7,In table 1, the mating bolt of property class 8.8 has been,excluded for use with a property class 9 nut.,Table 5 has been altered to indicate the heat treatment,requirements and the nut styles applicable to the nominal,sizes while the property class 9 nut has been restricted to,a maximum size of 16 mm to agree with the summary,given in table 12 of appendix A. All reference to the,Rockwell hardness values has been excluded.,In table 7 the proof load values for grade 9 nuts for sizes,M18 and greater have been deleted to maintain alignment,with table 5.,Editorial changes have been made to appendix Ato,maintain correct cross-references to the main body of,the standard.,Compliance with a British Standard does not of itself,confer immunity from legal obligations.,BS6104 : Part 2 : 1983,British Standard,Mechanical properties of fasteners,Part 2. Specification for nuts with specified proof load values,1. Scope,This British Standard specifies the mechanical properties,when tested at ambient temperature, the designation,chemical composition, heights and marking of nuts with,specified proof load values. Generally these nuts are suitable,for use within the temperature range +300 °C to -50 °C,but certain properties, especially long term properties,will be reduced at elevated temperatures within this range4,It is the responsibility of the user to determine suitability.,This standard applies to nuts:,(a) with nominal thread diameters up to and including,39 mm;,(b) of triangular ISO thread and with diameters and,pitches according to BS 3643 (coarse thread);,(c) with thread tolerances 6H according to BS 3643;,(d) with specific mechanical requirements;,(e) with width across flats (see table 6);,(f) with nominal heights greater than or equal to 0.5 D\,(g) made of carbon steel or low alloy steel.,It does not apply to nuts requiring special properties,such as:,(h) locking abilities (see BS 4929);,(i) weldability;,(j) corrosion resistance (see BS 6105);,(k) for ……
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