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Position: Chinese Standard in English/GB/T 5779.2-2000
GB/T 5779.2-2000   Fasteners - Surface discontinuities - Nuts (English Version)
Standard No.: GB/T 5779.2-2000 Status:valid remind me the status change

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Language:English File Format:PDF
Word Count: 4000 words Price(USD):120.0 remind me the price change

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Implemented on:2001-2-1 Delivery: via email in 1 business day
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Standard No.: GB/T 5779.2-2000
English Name: Fasteners - Surface discontinuities - Nuts
Chinese Name: 紧固件表面缺陷 螺母
Chinese Classification: J13    Fastener
Professional Classification: GB    National Standard
ICS Classification: 21.060.20 21.060.20    Nuts 21.060.20
Issued by: AQSIQ
Issued on: 2000-9-2
Implemented on: 2001-2-1
Status: valid
Superseding:GB/T 5779.2-1986
Language: English
File Format: PDF
Word Count: 4000 words
Price(USD): 120.0
Delivery: via email in 1 business day
Fasteners - Surface discontinuities - Nuts 1 Scope 1.1 This part establishes limits for various types of surface discontinuities on nuts. It applies to nuts with: Nominal thread diameters from 5mm up to and including 39mm; Product grades A and B; All property classes according to GB/T 3098.2 and GB/T 3098.4, unless otherwise specified in product standards or agreed between supplier and purchaser. 1.2 Even if the surface defects reach the allowable limit specified in Chapter 3, the mechanical and working performance of the product should still meet the minimum requirements specified in GB/T 3098.2, GB/T 3098.4 and GB/T 3098.9. In addition, it should meet the size requirements of the corresponding product standards. Notes: 1 The figures in Chapter 3 are only examples, and are applicable to other types of nuts accordingly. 2 For the sake of clarity, some surface defects are exaggerated in the figure. 2 Normative references The following standards contain provisions which, through reference in this standard, constitute provisions of this standard. At the time of publication, all editions cited are valid. All standards are subject to revision, and all parties using this standard are encouraged to investigate the possibility of applying the latest editions of the following standards. GB/T 90-1985 Acceptance inspection, marking and packaging of fasteners (eqv ISO 3269:1984) GB/T 1031-1995 Surface roughness parameters and their values (neq ISO 468:1982) GB/T 3098.2-2000 Mechanical properties of fasteners - Nuts - Coarse thread (idt ISO 898-2:1992) GB/T 3098.4-2000 Mechanical properties of fasteners - Nuts - Fine pitch thread (idt ISO 898-6:1994) GB/T 3098.9-1993 Mechanical properties of fasteners - Prevailing torque type steel hexagon nuts (eqv ISO 2320:1983) GB/T 3098.12-1996 Mechanical properties of fasteners - Cone proof load test on nuts (idt ISO 10485:1991) GB/T 3098.14-2000 Mechanical properties of fasteners - Widening test on nuts(idt ISO 10484:1997) 3 Types, causes, appearance and limits of surface discontinuities 3.1 cracks a crack is a clean (crystalline) fracture passing through or across the grain boundaries and may possibly follow inclusions of foreign elements. Cracks are normally caused by overstressing the metal during forging or other forming operations, or during heat treatment, or may have been present in the raw material. Where parts are subjected to significant reheating, cracks are usually discoloured by scale 3.1.1 quench cracks
Foreword I ISO Foreword II 1 Scope 2 Normative references 3 Types, causes, appearance and limits of surface discontinuities 4 Inspection and evaluation procedure
Referred in GB/T 5779.2-2000:
*GB/T 90-1985 Acceptance inspection,marking and packaging of fasteners
*GB/T 1031-1995 Surface rouglness--Parameters and their values
*GB/T 3098.2-2000 Mechanical properties of fasteners—Nuts—Coarse thread
*GB/T 3098.4-2000 Mechanical properties of fasteners-Nuts-Fine pitch thread
*GB/T 3098.9-1993 Mechanical properties of fasteners. Prevailing torque type steel hexagon nuts
*GB/T 3098.12-1996 Mechanical properties of fasteners —Cone proof load test on nuts
*GB/T 3098.14-2000 Mechanical properties of fasteners - Widening test on nuts
GB/T 5779.2-2000 is referred in:
* NB/T 47003.1-2009(JB/T 4735.1) Steel Welded Atmospheric Pressure Vessels
* HG/T 20584-2011 Technical requirements of fabrication for steel chemical vessels
* GB/T 3098.4-2000 Mechanical properties of fasteners-Nuts-Fine pitch thread
* DL/T 439-2006 The technical guide for high-temperature bolt of fossil-fired power plant
* GB/T 3098.2-2000 Mechanical properties of fasteners—Nuts—Coarse thread
* GB/T 6187.1-2000 Prevaling torque type all-metal hexagon with flange
* DL/T 439-2006 The technical guide for high-temperature bolt of fossil-fired power plant
* HG/T 20584-2011 Technical requirements of fabrication for steel chemical vessels
* NB/T 47003.1-2009(JB/T 4735.1) Steel Welded Atmospheric Pressure Vessels
* GB/T 3098.2-2000 Mechanical properties of fasteners—Nuts—Coarse thread
* GB/T 6170-2000 Hexagon Nuts, Style 1
* GB/T 6187.1-2000 Prevaling torque type all-metal hexagon with flange
* GB/T 3098.4-2000 Mechanical properties of fasteners-Nuts-Fine pitch thread
* GB/T 6187.1-2000 Prevaling torque type all-metal hexagon with flange
* GB/T 3632-2008 Sets of torshear type high strength bolt hexagon nut and plain washer for steel structures
* GB/T 6170-2000 Hexagon Nuts, Style 1
* GB/T 6172.1-2000 Hexagon thin nuts (chamfered)
* GB 1231-2006 Specifications of High Strength Bolts with Large Hexagon Head, Large Hexagonal Nuts and Plain Washers for Steel Structures
* GB/T 3098.2-2000 Mechanical properties of fasteners—Nuts—Coarse thread
* GB/T 1231-2006 Specifications of High Strength Bolts with Large Hexagon Head, Lar
* NB/T 47003.1-2009(JB/T4735) Steel Welded Atmospheric Pressure Vessels
* NBT 47020~47027-2012 Falnges, gaskets and stud bolts & nut for pressure vessels
* NB/T 47020-2012 Type and Specification for Pressure Vessel Flanges
* GB/T 6176-2016
* GB/T 6173-2015
* GB/T 6171-2016 Hexagon Nuts, Style 1-Fine Pitch Thread
* GB/T 6170-2015
*GB/T 889.1-2000 Prevailing torque type hexagon nuts (with non-metallic insert),style 1
*GB/T 3098.2-2015 Mechanical properties of fasteners—Nuts
*GB/T 6172.2-2016 Prevailing torque type hexagon thin nuts(with non-metallic insert)
*GB/T 6184-2000 Prevailing torque type all-metal hexagon nuts,style 1
*GB/T 3098.14-2000 Mechanical properties of fasteners - Widening test on nuts
*GB/T 9125.2-2020 Fasteners for steel pipe flange joints—Part 2:Class designated
*GB/T 9125.1-2020 Fasteners for steel pipe flange joints—Part 1:PN designated
*GB/T 6173-2000 Hexagon thin nuts (chamfered) with fin pitch thread
*GB/T 1231-2024 High strength bolts with large hexagon head assemblies for steel structures
Code of China
Standard
GB/T 5779.2-2000  Fasteners - Surface discontinuities - Nuts (English Version)
Standard No.GB/T 5779.2-2000
Statusvalid
LanguageEnglish
File FormatPDF
Word Count4000 words
Price(USD)120.0
Implemented on2001-2-1
Deliveryvia email in 1 business day
Detail of GB/T 5779.2-2000
Standard No.
GB/T 5779.2-2000
English Name
Fasteners - Surface discontinuities - Nuts
Chinese Name
紧固件表面缺陷 螺母
Chinese Classification
J13
Professional Classification
GB
ICS Classification
Issued by
AQSIQ
Issued on
2000-9-2
Implemented on
2001-2-1
Status
valid
Superseded by
Superseded on
Abolished on
Superseding
GB/T 5779.2-1986
Language
English
File Format
PDF
Word Count
4000 words
Price(USD)
120.0
Keywords
GB/T 5779.2-2000, GB 5779.2-2000, GBT 5779.2-2000, GB/T5779.2-2000, GB/T 5779.2, GB/T5779.2, GB5779.2-2000, GB 5779.2, GB5779.2, GBT5779.2-2000, GBT 5779.2, GBT5779.2
Introduction of GB/T 5779.2-2000
Fasteners - Surface discontinuities - Nuts 1 Scope 1.1 This part establishes limits for various types of surface discontinuities on nuts. It applies to nuts with: Nominal thread diameters from 5mm up to and including 39mm; Product grades A and B; All property classes according to GB/T 3098.2 and GB/T 3098.4, unless otherwise specified in product standards or agreed between supplier and purchaser. 1.2 Even if the surface defects reach the allowable limit specified in Chapter 3, the mechanical and working performance of the product should still meet the minimum requirements specified in GB/T 3098.2, GB/T 3098.4 and GB/T 3098.9. In addition, it should meet the size requirements of the corresponding product standards. Notes: 1 The figures in Chapter 3 are only examples, and are applicable to other types of nuts accordingly. 2 For the sake of clarity, some surface defects are exaggerated in the figure. 2 Normative references The following standards contain provisions which, through reference in this standard, constitute provisions of this standard. At the time of publication, all editions cited are valid. All standards are subject to revision, and all parties using this standard are encouraged to investigate the possibility of applying the latest editions of the following standards. GB/T 90-1985 Acceptance inspection, marking and packaging of fasteners (eqv ISO 3269:1984) GB/T 1031-1995 Surface roughness parameters and their values (neq ISO 468:1982) GB/T 3098.2-2000 Mechanical properties of fasteners - Nuts - Coarse thread (idt ISO 898-2:1992) GB/T 3098.4-2000 Mechanical properties of fasteners - Nuts - Fine pitch thread (idt ISO 898-6:1994) GB/T 3098.9-1993 Mechanical properties of fasteners - Prevailing torque type steel hexagon nuts (eqv ISO 2320:1983) GB/T 3098.12-1996 Mechanical properties of fasteners - Cone proof load test on nuts (idt ISO 10485:1991) GB/T 3098.14-2000 Mechanical properties of fasteners - Widening test on nuts(idt ISO 10484:1997) 3 Types, causes, appearance and limits of surface discontinuities 3.1 cracks a crack is a clean (crystalline) fracture passing through or across the grain boundaries and may possibly follow inclusions of foreign elements. Cracks are normally caused by overstressing the metal during forging or other forming operations, or during heat treatment, or may have been present in the raw material. Where parts are subjected to significant reheating, cracks are usually discoloured by scale 3.1.1 quench cracks
Contents of GB/T 5779.2-2000
Foreword I ISO Foreword II 1 Scope 2 Normative references 3 Types, causes, appearance and limits of surface discontinuities 4 Inspection and evaluation procedure
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Keywords:
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