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  • BSI
    BS 4638:1970 Specification for carbon steel wire for zigzag and square-form springs
    Edition: 1970
    $285.92
    / user per year

Description of BS 4638:1970 1970

1.1 This British Standard specifies the requirements for patented cold drawn plain carbon steel round wire, suitable for forming into zigzag and square-form springs used in the production of seat and back units for cars and certain types of domestic upholstery. Wire to this standard is not intended for use in the manufacture of mechanical springs.

The definition of patenting is given in BS 6562-1.

1.2 The standard includes preferred metric sizes of wire for the two types of spring and gives a choice of tensile strength ranges.



Requirements for patented cold drawn plain carbon steel round wire in three grades of tensile strength. Chemical composition, standard sizes and tolerances, methods of testing, mechanical properties and details of packing and identification.

Standard NumberBS 4638:1970
TitleSpecification for carbon steel wire for zigzag and square-form springs
StatusConfirmed
Publication Date1970-10-22
DescriptorsChemical composition, Unalloyed steels, Seating, Tensile strength, Wires, Steels, Springs, Square shape, Diameter, Torsion testing
ICS77.140.25 Spring steels
CommitteeISE/106
ISBN0 580 06074 8
PublisherBSI
Pages10



About BSI

BSI Group, also known as the British Standards Institution is the national standards body of the United Kingdom. BSI produces technical standards on a wide range of products and services and also supplies certification and standards-related services to businesses.
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