Changzhou Liyu spring Co., Ltd

High temperature springs·CUSTOMIZATION

High temperature resistant springs are springs made of special materials, suitable for working in a high temperature environment of 200℃-1000℃, and are mostly used in harsh working conditions such as automobiles, brazing furnaces, valves, electricity, and chemicals. High temperature resistant springs mainly include high temperature resistant compression springs, high temperature resistant wave springs, high temperature resistant extension springs, high temperature resistant torsion springs, high temperature resistant mold springs, high temperature resistant plate disc springs, etc. High-temperature spring technical standards: The mechanical industry standard of the People’s Republic of China JB/T 6655-93 high-temperature spring technical conditions has been replaced by JB/T 6655-2013.

The materials of high temperature resistant springs are generally alloy spring steel etc. The conventional grades are such as:

  • Alloy spring steel (55CrSiA, 50CrVA,)

  • Stainless steel (301, 302, 304, 316, 17-7PH, 15-7Mo);

  • Special alloy steel (GH4145, GH4169, GH2132, GH4090, 30W4Cr2VA);

  • Imported brands (Inconel X-750, Inconel 718, Nimonic90), etc.

  • High temperature alloy materials are recommended for high temperature resistant springs above 400℃, and stainless steel materials can also be used for temperatures below 400℃

  • The recommended operating temperature of various materials of high temperature spring is shown in the following table:
  • Material/Standard Grade The recommended maximum operating temperature ℃
    Stainless steel GB/T1220 SUS301/SUS304/SUS316 200℃
    SUS631/17-7PH 370°C
    SUS632/15-7Mo 470°C
    Alloy spring steel GB/T1222 50CrVA/55CrSiA 300℃
    30W4Cr2VA 500°C
    Die steel GB/T1299 H13 (material for disc spring) 500℃
    Iron-based superalloy GB/14992 GH2132/Incoloy A-286 550°C
    GH2135 600°C
    Nickel-based superalloy GB/14992 GH4145/Inconel X-750 650℃
    GH4169/Inconel 718 700°C
    GH4090/Nimonic 90 800℃(γ<0.1) light thrust
    GH4099/GH5605 1000°C (γ<0.1) light thrust
    Cobalt-based superalloy GH4141/Rene 41 1000℃ (light thrust)

    High temperature resistant springs are generally used at higher temperatures. In addition to the usual creep and relaxation of springs used at high temperatures, the bonding force between atoms decreases due to the increase in molecular thermal motion. The quantitative values ??of the material's elastic modulus E and shear modulus G essentially reflect the bonding force between atoms, so the temperature rises and the distance between atoms increases, resulting in a decrease in E and G values. Generally, every time the temperature of steel increases by 100°C, the E and G values ??decrease by about 3%-6%. Because the elastic force and torque of the spring are directly proportional to the elastic modulus of the material, even if the geometric dimensions of the spring do not change at high temperatures, the elastic force and torque are lower than normal temperature. In the calculation, the G value can be estimated with reference to the following table: To

    Temperature/℃ 20 100 200 300 400 500 600 700
    Shear modulus G/MPa 80500 77500 74800 72400 70200 68300 65100 61900
    Phone :86-519-82329557 / 82338435 Telephone :?13235185183(QQ\Wechat) 13901490575(Wechat) Email :? Skype:? Address :?No.6 Houguan Road, Jincheng Town Industrial Park, Jintan District, Changzhou City