Henan Friend Metal Products Co.,Ltd

Henan Friend Metal Products Co.,Ltd

Spring steel wire's selection principles

The principle of spring selection is: first to meet the needs of the function, followed by the strength of the need to consider the end of the economy.

Carbon spring steel is widely used in spring steel, the largest amount of steel. Steel containing 0.60% to 0.90% of carbon and 0.3% to 1.20% of the manganese, no longer add other alloying elements, the use of relatively low cost. Carbon spring steel wire with proper processing or heat treatment, can get a high tensile strength, to meet the patience and excellent fatigue life. But the carbon steel wire hardenability is low, anti-sluggish function and corrosion resistance is poor, the elastic modulus of the larger temperature coefficient (up to 300 × 10-6 / ℃), suitable for making smaller cross-section, low operating temperature ( 120 ° C>).

Alloy spring steel generally contains 0.45% to 0.70% carbon and a certain amount of Si, Mn, Cr, V, W and B alloying elements. The participation of alloying elements improves the resistance of the spring steel to the sluggish function, the advancement of the steel, and the hardenability of the advance steel and the use of temperature. It is suitable for the production of larger cross sections and springs at higher temperatures.

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