This Standard specifies requirements for carbon steel spring wire of round cross-section, supplied in the hard-drawn condition and intended for the manufacture of coil springs (including helical lacing springs), square-formed springs and sinuous springs for bedding and seating used in the automotive, transport and furniture manufacturing industries. This Standard applies only to wire supplied in the form of coils. It does not cover the testing of wire that is supplied in mechanically straightened cut-lengths, or wire that has been straightened by the user. The Standard applies to the supply of wire only in the uncoated condition, that is, without a metallic coating. However, wire may be supplied with an optional zinc- or zinc/aluminium alloy-coated finish by explicit arrangement with the manufacturer; if such a coating is agreed, it is recommended that the requirements specifically relevant to coating in AS 1472 be adopted. NOTES: 1 Wires for mechanical springs for general engineering applications are covered by AS 1472. 2 Optional metallic coatings other than zinc or zinc/aluminium alloy, such as copper, may be available from wire manufacturers; in such cases, requirements for the coating should be agreed at the time of enquiry. 3 In this Standard the term ‘drawing’, alone or in combination, or a variation of ‘drawing’, such as ‘drawn’, is intended to embrace any other technically feasible means, such as ‘rolling’, by which cold-working of steel feedstock enables wire of round cross-section to be achieved. 4 Mechanical straightening introduces small, but significant, changes in diameter and mechanical properties (e.g. tensile strength) of as-drawn spring wire, and the degree of change varies with the straightening technique employed. 5 Advice and recommendations on information to be supplied by the purchaser at the time of enquiry or order are contained in the purchasing guidelines set out in Appendix A. 6 Alternative means for determining compliance with this Standard are given in Appendix B.