Spring materials under high temperature strength, has good thermal stability, anti relaxation or creep ability of anti-oxidation, anti corrosion ability. Spring temperature increases, the elastic modulus of the material decrease spring stiffness, resulting in decreased, carrying capacity is smaller. Therefore, the spring under high temperature must understand the variation of elastic modulus ratio (value), the drop of the load carrying capacity calculation of the spring on the effects of using performance. In accordance with the provisions of GB1239, the working temperature of the ordinary spiral spring more than 60 DEG C, deal with the shear modulus correction. Spring steel, hardness (intensity) of the selection should be based on the spring bearing properties and stress. However, the relationship between hardness level and the plane strain fracture toughness greatly.
The spring contact other corrosive medium in acid, general selection of stainless steel or nickel alloy corrosion resistant material. Spring used in the general environment condition, use an ordinary spring steel, anti rust coating or plating on its surface is made of spring after (zinc, cadmium plating, copper plating) method for corrosion protection. Spring used in weighing apparatus and instruments, in order to meet the needs of its accuracy is not affected by temperature changes, general selection of elastic modulus and expansion coefficient of variation of the minimum constant elastic alloy.