Spring Wire


Industrial Spring Wire

If you’re looking for industrial spring wire, NOCKERS ENGINEERING PRODUCTS have an extensive range of options used by a number of different industries. Whether you want round or flat spring wire, we supply the whole of South Africa and international clients with everything you need. We source industrial spring wire that complies with ISO: 9001 certification to ensure you have a high quality, reliable product to use. Our industrial spring wires are offered in a wide range of different alloys to meet your requirements, including copper, nickel and phosphor bronze.

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Wire for the manufacture of SPRINGS is produced in five broad material types, from high volume / low cost carbon steel to very low volume / very high cost nickel alloys.

NOCKERS ENGINEERING PRODUCTS can supply these from container load to 1 kg quantities respectively.

1. Carbon Steel

Spring wires are most commonly produced in carbon steel, either hard drawn in its most basic form, or patented drawn and phosphated, for superior and more consistent performance.

Various tensile strength grades from low, medium to high can be obtained by using different carbon compositions and drawing techniques. The highest tensile strength grades are commonly referred to as “music” or “piano” wires.

Carbon steel wires can be supplied with black or grey phosphated finishes, or with various coatings such as zinc (galvanized), copper, tin and nickel.

2. Alloy Steel

For superior dynamic performance and longer life cycles, alloy steel wires are produced with small additions of silicon, chrome or vanadium, and are oil hardened and tempered (OHT) or induction hardened and tempered (IHT) to produce the desired mechanical characteristics. Such wires are commonly used in smaller diameters for valve springs and larger diameters for vehicle axle springs, both of which have a continuous dynamic operation.

3. Stainless Steel

For improved corrosion resistance in humid or wet environments or in the presence of mineral salts, stainless steel spring wire is used. The most common grade is AISI 302 (1.4310) but AISI 316 (1.4401) and 17/7PH (1.4568) are also specified for better corrosion resistance or for use up to higher temperatures (<300oC) respectively.

4. Copper Alloys

Copper alloys are specified for spring applications where electrical conduction and / or soldering ability is required. Phosphor Bronze or Beryllium Copper grades are commonly used in this application.

High copper alloys are also specified for the manufacture of springs for use in gaseous or flammable environments, or gas equipment, due to their non-sparking characteristic. Monel® K500 is commonly used in this application.


  • Copper alloy spring wire

5. Nickel Alloys

For the highest temperature applications and those requiring the most corrosion resistance, nickel alloy spring materials have been developed. These are super specialized and therefore super expensive, but necessary for the most stringent applications in gas turbines, aerospace applications, nuclear reactors and other safety critical operations. Materials include Inconel® 718, Inconel® X750, Nimonic® 80A and Nimonic® 90.


  • Nickel alloy spring wire

Through our wire manufacturing principals and associates in the spring design and manufacturing sectors NOCKERS ENGINEERING PRODUCTS is able to assist with material selection and supply of wire for most spring applications.

Looking for industrial wire for manufacturing purposes? We're here to help you!