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High Quality Induction Metal Weld Heater Comparing with Ceramic Pad Weld Heater in Many Fields

Certain materials can actually be damaged by PWHT, while others almost always require it. In general, the higher the carbon content of a material, the more likely...

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Certain materials can actually be damaged by PWHT, while others almost always require it. In general, the higher the carbon content of a material, the more likely it needs PWHT after welding activities have been conducted. Similarly, the higher the alloy content and cross-sectional thickness, the more likely the material is to need PWHT.
In order to ensure the material strength of a part is retained after welding, a process known as Post Weld Heat Treatment (PWHT) is regularly performed. PWHT can be used to reduce residual stresses, as a method of hardness control, or even to enhance material strength.
If PWHT is performed incorrectly, or neglected altogether, residual stresses can combine with load stresses to exceed a material's design limitations. This can lead to weld failures, higher cracking potential, and increased susceptibility to brittle fracture.

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