plate, especially low carbon plate is used in the as-burned condition.
Some grades, such as A516 or A514, will have been put through a thermal
treatment process at the mill to achieve certain mechanical properties
as required by the specification; these generally do not require further
thermal treatment after flamecutting. But certain grades or certain
applications will need it.
Thermal treatment of steel plate is done for a variety of reasons,
but these can generally be divided into three categories:
1. Reduce and relieve internal stresses
2. Reduce hardness and/or create a more uniform grain structure
3. Achieve specific mechanical properties
Grades, like A36 or A572 may need to be stress-relieved after burning.
Medium carbon 1045 and alloy plate like 4140 and 4340 should always
be annealed after burning and in many applications go on to be quench-and-tempered
to achieve certain hardness or strength levels. Whatever your requirements
for thermal treatment, Oliver is prepared to handle them for you.