EB-450 plate is normally used in the
as-received, quenched and tempered, full hardness condition. Occasionally, customers want to temper the plate to a reduced hardness specification. In this case, the graph below will give an indication of the appropriate tempering
temperature to specify.
If, due to hot forming, requenching is required
for EB-450, the formed part should be soaked at 1650°F for 1 hour per inch minimum. To reduce the likelihood of cracking, plates should also be tempered at 450°F. Fixturing may be considered to reduce distortion due to the quenching operation.
In order to estimate the hardness to be
expected after hot forming and air cooling EB-450 plate, AWT performed a heat treat study. A 1-1/2" thick sample of EB-450 was heated to 1650°F and held for 1-1/2 hours and cooled in still air. The resulting hardness was measured to
be 341 BHN on the surface and 331 BHN throughout the section.
Product Information
Product Specifications
Welding Guidelines
Machining
Forming
Cutting
Printable Specs Sheet
