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Position: Chinese Standard in English/GB/T 5779.3-2000
GB/T 5779.3-2000   Fasteners - Surface discontinities - Bolts, screws and studs for special requirements (English Version)
Standard No.: GB/T 5779.3-2000 Status:valid remind me the status change

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Language:English File Format:PDF
Word Count: 9000 words Price(USD):270.0 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 5779.3-2000
English Name: Fasteners - Surface discontinities - Bolts, screws and studs for special requirements
Chinese Name: 紧固件表面缺陷 螺栓、螺钉和螺柱 特殊要求
Chinese Classification: J13    Fastener
Professional Classification: GB    National Standard
ICS Classification: 21.060.10 21.060.10    Bolts, screws, studs 21.060.10
Issued by: AQSIQ
Issued on: 2000-9-2
Implemented on: 2001-2-1
Status: valid
Superseding:GB/T 5779.3-1986 Surface discontinuities of fasteners on bolts screws and studs--Special requirements
Language: English
File Format: PDF
Word Count: 9000 words
Price(USD): 270.0
Delivery: via email in 1 business day
1 Scope 1.1 This standard specifies limits for various types of surface discontinuities on bolts, screws and studs for special requirements. It applies to bolts, screws and studs with: — nominal thread diameters 5 mm and larger; — product grades A and B; — nominal lengths l ≤ 10d (or longer if specified); — property class 12.9; — property classes 8.8, 9.8 and 10.9 when specified in product standards or agreed between supplier and purchaser. 1.2 Where the permissible limits for surface discontinuities indicated in clause 3 occur, the minimum values for the mechanical and functional properties specified in GB/T 3098.1 should still be met. When fatigue strength requirements are specified, the fatigue strength should not be lower than that obtained on bolts without defects taken from the same lot. Note 1: The figures in clause 3 are examples only. They apply correspondingly also to other types of bolts, screws and studs. Note 2: The individual figures show the surface discontinuities exaggerated in some cases for clarity. 2 Normative References The following standards contain provisions which, through reference in this text, constitute provisions of this standard. At the time of publication, all the editions listed were valid. All standards are subject to revision, and parties to agreements based on this standard are encouraged to investigate the possibility of applying the most recent edition of the standard indicated below. 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 2828-1987 Sampling Procedures and Tables for Lot-by-lot Inspection by Attributes (Apply to Inspection of Successive Lots or Batches) GB/T 3098.1-2000 Mechanical Properties of Fasteners — Bolts, Screws and Studs (idt ISO 898-1:1999) GB/T 15239-1994 Sampling Procedures and Tables for Isolated Lot Inspection by Attributes 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. Where parts are subjected to significant reheating, cracks usually are discoloured by scale.
Foreword II ISO Foreword III 1 Scope 2 Normative References 3 Types, Causes, Appearance and Limits of Surface Discontinuities 4 Inspection and Evaluation Procedure Annex A (Normative) Sampling Plan for Surface Discontinuities
Referred in GB/T 5779.3-2000:
*GB/T 90-1985 Acceptance inspection,marking and packaging of fasteners
*GB/T 1031-1995 Surface rouglness--Parameters and their values
*GB/T 2828-1987 Sampling procedures and tables for lot-by-lot inspection by attributes (Apply to inspection of successive lots or batches)
*GB/T 3098.1-2000 Mechanical Properties of Fasteners - Bolts, Screws and Studs
*GB/T 15239-1994 Sampling procedures and tables for isolated lot inspection by attributes
GB/T 5779.3-2000 is referred in:
* GB/T 70.1-2008 Hexagon socket head cap screws
* GB/T 70.3-2008 Hexagon socket countersunk head screws
* GB/T 70.2-2000 Hexagon Socket Button Head Screws
* GB/T 3098.1-2010 Mechanical properties of fasteners—Bolts,screws and studs
* HG/T 20584-2011 Technical requirements of fabrication for steel chemical vessels
* GB/T 3098.1-2010 Mechanical properties of fasteners—Bolts,screws and studs
* HG/T 20584-2011 Technical requirements of fabrication for steel chemical vessels
* GB/T 70.1-2008 Hexagon socket head cap screws
* GB/T 70.3-2008 Hexagon socket countersunk head screws
* GB/T 3098.1-2000 Mechanical Properties of Fasteners - Bolts, Screws and Studs
* GB/T 70.2-2000 Hexagon Socket Button Head Screws
* GB/T 5783-2000 Hexagon Head Bolts-Full Thread
* GB/T 70.1-2000 Hexagon Socket Head Cap Screw
* GB/T 70.2-2000 Hexagon Socket Button Head Screws
* GB/T 70.2-2000 Hexagon Socket Button Head Screws
* GB/T 70.2-2000 Hexagon Socket Button Head Screws
* GB/T 5782-2000 Hexagon Head Bolts
*GB/T 5779.1-2000 Fasteners-Surface discontinuities-Bolts,screws and studs for general requirements
*GB/T 70.6-2020 Hexagon socket head cap screws-Fine pitch thread
Code of China
Standard
GB/T 5779.3-2000  Fasteners - Surface discontinities - Bolts, screws and studs for special requirements (English Version)
Standard No.GB/T 5779.3-2000
Statusvalid
LanguageEnglish
File FormatPDF
Word Count9000 words
Price(USD)270.0
Implemented on2001-2-1
Deliveryvia email in 1 business day
Detail of GB/T 5779.3-2000
Standard No.
GB/T 5779.3-2000
English Name
Fasteners - Surface discontinities - Bolts, screws and studs for special requirements
Chinese Name
紧固件表面缺陷 螺栓、螺钉和螺柱 特殊要求
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 5779.3-1986 Surface discontinuities of fasteners on bolts screws and studs--Special requirements
Language
English
File Format
PDF
Word Count
9000 words
Price(USD)
270.0
Keywords
GB/T 5779.3-2000, GB 5779.3-2000, GBT 5779.3-2000, GB/T5779.3-2000, GB/T 5779.3, GB/T5779.3, GB5779.3-2000, GB 5779.3, GB5779.3, GBT5779.3-2000, GBT 5779.3, GBT5779.3
Introduction of GB/T 5779.3-2000
1 Scope 1.1 This standard specifies limits for various types of surface discontinuities on bolts, screws and studs for special requirements. It applies to bolts, screws and studs with: — nominal thread diameters 5 mm and larger; — product grades A and B; — nominal lengths l ≤ 10d (or longer if specified); — property class 12.9; — property classes 8.8, 9.8 and 10.9 when specified in product standards or agreed between supplier and purchaser. 1.2 Where the permissible limits for surface discontinuities indicated in clause 3 occur, the minimum values for the mechanical and functional properties specified in GB/T 3098.1 should still be met. When fatigue strength requirements are specified, the fatigue strength should not be lower than that obtained on bolts without defects taken from the same lot. Note 1: The figures in clause 3 are examples only. They apply correspondingly also to other types of bolts, screws and studs. Note 2: The individual figures show the surface discontinuities exaggerated in some cases for clarity. 2 Normative References The following standards contain provisions which, through reference in this text, constitute provisions of this standard. At the time of publication, all the editions listed were valid. All standards are subject to revision, and parties to agreements based on this standard are encouraged to investigate the possibility of applying the most recent edition of the standard indicated below. 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 2828-1987 Sampling Procedures and Tables for Lot-by-lot Inspection by Attributes (Apply to Inspection of Successive Lots or Batches) GB/T 3098.1-2000 Mechanical Properties of Fasteners — Bolts, Screws and Studs (idt ISO 898-1:1999) GB/T 15239-1994 Sampling Procedures and Tables for Isolated Lot Inspection by Attributes 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. Where parts are subjected to significant reheating, cracks usually are discoloured by scale.
Contents of GB/T 5779.3-2000
Foreword II ISO Foreword III 1 Scope 2 Normative References 3 Types, Causes, Appearance and Limits of Surface Discontinuities 4 Inspection and Evaluation Procedure Annex A (Normative) Sampling Plan for Surface Discontinuities
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Keywords:
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