1. Stainless Steel Wire For Spring

The corrosion resistance of stainless steels removes the requirement for any additional protective coatings making them the ideal material for springs operating in a range of corrosive conditions, high temperatures and in locations where maintenance and replacement are difficult.

2. Why choose our stainless steel spring wire?

All Stainless spring wires are manufactured to a high and consistent quality including;

Tensile strength - offering consistent spring forming capabi­lities.

Surface finish and soap coating - to lubricate and aid the forming of the springs when running at high speeds through spring forming machines providing good spring coiling charac­te­ristics.

Cast & helix - offering maximum product performance.

The spring properties of stainless spring wires are obtained by precision cold drawing meaning the tensile strength of the spring wires are maintained at operating temperatures up to 250°C with stainless steel springs able to be used in reduced stress levels up to 450°C.

3. What kind of stainless steel spring wire?

Currently there are about 10 international common stainless spring steel wire grades, according to the microstructure can be divided into martensitic, ferritic, austenitic three types; according to processing and use can be divided into phase change reinforced, deformation-reinforced and precipitation-hardened three types.

3.1 Martensitic stainless steel wire

Martensitic steel wire is a phase change reinforced spring steel wire, more lightly drawn or annealed state of supply, the wire into a spring after winding and then quenched - tempered, tempered martensitic or sartensitic organization. Annealed or lightly drawn martensitic steel wire, moderate strength, good flexibility, can be processed into a variety of complex shapes of the spring element, after quenching and tempering of the spring element performance uniform, isotropic, with good corrosion resistance, in the air, water, water vapor and some weak acidic media have a more stable fatigue limit. Commonly used grades are 414, 420, 420J2, 431, 15Х12Н2МФ, 420S45, 431S29 and 441S49, and so on. Spring martensitic wire finished product tensile strength generally does not exceed 950MPa

3.2 Ferritic stainless steel wire

Ferritic stainless steel wire can not be strengthened by quenching - tempering, a deformation-reinforced spring steel wire. Generally speaking, the corrosion resistance of ferritic stainless steel is slightly better than martensitic stainless steel, ferritic steel wire cold working performance is good, can withstand more than 90% reduction in face rate of drawing, but its cold working strengthened coefficient is low, the finished wire tensile strength is generally not more than 1100N / mm2, more for the production of low-stress spring, or further processed into a complex shape of the shaped spring. Common grades 409, 409Nb, 430, 434, SUS430 and GARBA17C1, etc..

3.3 Austenitic stainless steel wire

Austenitic stainless steel has excellent corrosion resistance, excellent cold working plasticity, and a high cold working strengthening factor, can be drawn by a large reduction in face rate to achieve a high strength. It is used to make elastic elements for use in corrosive environments and various corrosive media. From the petroleum, chemical, textile and other traditional industrial sectors, to food processing, home appliances, household cosmetics, austenitic stainless spring steel wire has a role in weight. Austenitic stainless steel is divided into 200 series, 300 series and precipitation hardening type three categories. Commonly used grades are 302, 304H, 316H, SUS302, SUS304, SUS304N1, SUS316, 302S26, 301S81, X12CrNi17.7, XM-28, 201 and S20430 (204Cu).

4. Specification of stainless steel wire

ASTM A313M-2003 Stainless Spring Steel Wires

JIS G4314-1994 Stainless steel wire for springs

DIN17224-1982 stainless spring steel wire and spring steel strip

BS2056-1991 Stainless steel wire for mechanical springs

EN10270-3:2001 Stainless spring steel wires

ISO6931-1-1994(E) Stainless steel for springs Part 1: Steel wire

5.Stainless steel spring wire grade