Why Should You Heat Treat Springs
Heat treatment of springs offers enormous advantages such as improved fatigue life, toughness, and ductility. When heat treating a spring it changes the special properties of the material such as hardness, strength, toughness and elasticity which are some of the key concerns for high-quality spring.
Heat Treatment Process:
All material is not heat-treated in the same way. Therefore, we first understand the purpose of your application and the environment in which the spring will operate. Then we choose the appropriate process that can be applied to your spring. To attain the expected tensile strength, we follow different heat treatment processes.
Heat treatment for some material is given below:
| Inconel X750 | Monel K-500 | |
|---|---|---|
|
Annealed |
||
|
Heat treatment |
2000 -2200o F |
1600oF (870o C) |
|
Tensile Strength |
130 ksi max |
80 – 110 ksi |
|
No.1 Tempered |
||
|
Heat treatment |
As supplied condition |
|
|
Tensile Strength |
130 – 165 ksi |
|
|
No.1 Tempered + Aged |
||
|
Heat treatment |
After spring coiling. Age: 1350°F (732°C) for 16 hours. |
|
|
Tensile Strength |
165 – 220 ksi |
|
|
Spring Temper |
||
|
Heat treatment |
As supplied condition |
As supplied condition |
|
Tensile Strength |
160 – 220 ksi |
145 – 190 ksi |
|
Spring Temper + Aged |
||
|
Heat treatment |
After spring coiling. Age: 1200°F (649°C) for 4 hours. |
After spring coiling. Age: 1000°F (540°C) for 10 hours. |
|
Tensile Strength |
180 – 250 ksi |
160 – 200 ksi |
|
Spring Tempered + Sol + Aged |
||
|
Heat treatment |
After spring coiling. Solution heat treat: 2100°F (1149°C) for 2 hours and air cool. |
|
|
Tensile Strength |
145 – 190 ksi |
