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BS 7670-2:1997

Current
Current

The latest, up-to-date edition.

Steel nuts and bolts for resistance projection welding Specification for welding of weld nuts and weld bolts
Available format(s)

Hardcopy , PDF

Language(s)

English

Published date

03-15-1997

Publisher

British Standards Institution

Committees responsible
Foreword
Specification
1 Scope
2 References
3 Definitions
4 Steel
5 Information and requirements to be agreed and to be
    documented
6 Surface conditions
7 Edge conditions and form of component
8 Shape and dimensions
9 Materials for electrode assembly
10 Design of electrode assembly
11 Weld assessment
12 Routine inspection of welded components
13 Reclamation
Annexes
A (informative) Recommendations for appropriate welding
    equipment
B (informative) Typical welding conditions
C (informative) Welding procedure information
Tables
1 Weld nut size relative to sheet thickness
2 Typical torque values for weld nuts
B.1 Typical welding condition for square weld nuts
B.2 Typical weld conditions for weld bolts
Figures
1 Positioning of square and hexagonal nuts prior to
    welding
2 Location of weld bolt
List of references

Defines projection welding of weld nuts and weld bolts singly to uncoated and coated steel sheet of thickness between 0.5 mm and 5.0 mm.

This British Standard specifies projection welding of weld nuts and weld bolts singly to uncoated and coated steel sheet from 0.5 mm to 5.0 mm thick. Annex A gives recommendations for appropriate welding equipment and annex B outlines typical welding conditions.

NOTE 1. It is emphasized that this type of weld is loaded in compression only. The purpose of the weld is to prevent the fastener from rotating during assembly or disassembly of a fabrication. It is not intended as a structural weld.

This standard specifies weld nuts and weld bolts, the design, dimensions and materials of which are detailed in Part 1 of this standard. Annular projections are not included. In addition to the definitive requirements specified throughout the standard, the documented items detailed in clause 5 shall be satisfied before a claim of compliance with the standard can be made and verified.

Committee
WEE/29
DevelopmentNote
Supersedes 95/703043 DC and BS 2996(1958). (10/2005) Reviewed and confirmed by BSI, December 2011. (11/2011)
DocumentType
Standard
Pages
12
PublisherName
British Standards Institution
Status
Current
Supersedes

BS 7670-1:1993 Steel nuts and bolts for resistance projection welding. Specification for dimensions and properties

BS EN 20865:1992 Slots in platens for projection welding machines
BS 4577:1970 Specification for materials for resistance welding electrodes and ancillary equipment
BS EN 10152:2017 Electrolytically zinc coated cold rolled steel flat products for cold forming. Technical delivery conditions
BS 3065:1982 Specification for rating of resistance welding equipment
BS EN 10025:1993 Hot rolled products of non-alloy structural steels. Technical delivery conditions
BS EN 10113-3:1993 Hot-rolled products in weldable fine grain structural steels Delivery conditions for thermomechanical rolled steels
BS EN 10147:2000 Continuously hot-dip zinc coated structural steels strip and sheet. Technical delivery conditions
BS EN 10142:2000 Continuously hot-dip zinc coated low carbon steels strip and sheet for cold forming. Technical delivery conditions
BS 7670-1:1993 Steel nuts and bolts for resistance projection welding. Specification for dimensions and properties
BS EN 10215:1995 Continuously hot-dip aluminium-zinc (AZ) coated steel strip and sheet. Technical delivery conditions
BS 6536:1985 Specification for continuously hot-dip aluminium/silicon coated cold reduced carbon steel sheet and strip
BS 1449-1.1:1991 Steel plate, sheet and strip. Carbon and carbon-manganese plate, sheet and strip General specification
BS 499-1:1991 Welding terms and symbols Glossary for welding, brazing and thermal cutting

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