VACUUM ANNEALING. Annealing carried out at sub-atmospheric pressure.
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ULTIMATE STRENGTH. The maximum conventional stress (tensile, compressive or shear) that a material can withstand.
SEVERITY OF QUENCH. Ability of quenching medium to extract heat from a hot steel workpiece; expressed in terms of the H value.
ACID EMBRITTLEMENT. A form of hydrogen embrittlement that may be induced in some metals by acid treatment.
SOAKING. Prolonged holding at a selected temperature to effect homogenization of structure or composition.