Carbon Steels
Generally used on low-carbon steels, the stress relieving temperature is below the critical temperature and typically ranges from 550°C to 650°C (1020°F to 1200°F).
The soaking time of this industrial method at this temperature may vary, but is often in the range of 1 to 2 hours.
Stainless Steels
The stress-relieving temperature for stainless steels is usually between 550°C and 900°C (1020°F to 1650°F), depending on the specific alloy.
The soaking time can range from 30 minutes to several hours, depending on the thickness of the material and the severity of the stresses.
Aluminum Alloys
For aluminum alloys, stress relieving (also called partial anneal) is typically performed at temperatures ranging from 260°C to 440°C (500°F to 660°F).
The duration of the stress-relieving process for aluminum alloys is generally short, often around 1 to 2 hours.
Nickel Alloys
Nickel alloys may undergo stress relieving at temperatures ranging from 425°C to 1040°C (800°F to 1900°F), depending on the alloy composition.
The soaking time for nickel alloys is usually in the range of 15 minutes to 3 hours and is fairly efficient.
Titanium Alloys
Titanium alloys when allowed are stress relieved at temperatures around 595°C (1100°F). For previously aged parts, typical temperatures range from 400°C to 675°C (750°F to 1250°F)
The soaking time for titanium alloys can vary, but is typically 2 hours.
Its important to note that the specific temperature and duration for stress relieving are influenced by factors such as the alloy composition, thickness of the material, and the nature and extent of the stresses to be relieved. The goal is to allow the material to reach a uniform temperature throughout, relieving internal stresses without causing excessive softening or other undesired changes in its properties. Engineers and metallurgists carefully consider these factors to establish the optimal stress relieving parameters for each specific application.
