Stress relief

It is applied to metals made of casting, hot or cold forging, drawing, welding, machining, grinding and EDM (wire and plunge erosion).

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It is done in order to reduce the internal stresses that may occur in the material and the dimensional changes that may occur under both heat treatment and working conditions. It is made between 150°C and 650°C, depending on the type of metal. Depending on the situation, a protective atmosphere may be required.

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If stress relieving is performed on a material that has undergone a hardening heat treatment, the treatment temperature and time must be selected so as not to reduce the hardness of the material.

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Material groups that need this heat treatment:

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• It can be applied on all metal materials.

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• Steels

  • 1.3343, SAE 4340, 1.2344, 1.2379, 100Cr6 etc.​

• Cast iron​

  • GG25 (EN-JL 1040), ​GGG-40 (EN-GJS-450-10), ASTM A48

• Nickel-based superalloys

  • Inconel, Waspaloy, Hastelloy, Incoloy and Udimet etc.​

• Precipitation hardening stainless steels

  • 17-4 PH, Maraging250, A-286

• Titanium alloys

  • 6Al-4V, 6Al-2Sn-4Zr-2Mo and 13V-11Cr-3Al​

• Aluminum alloys

  • 6061, 7075, 2014 and 7050​

• Copper alloys

  • UNC C17200, C17300​

• Magnesium alloys

  • HM21, ZK31

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