(i) The operation of tempering.
(ii) The degree of hardness left in a steel bar after quenching and tempering.
(iii) The grading of the hardness of low carbon cold rolled strip, e.g. hard, half hard, quarter hard, skin passed, soft.
(iv) An indication of the amount of carbon present in a tool steel, e.g. razor temper, file temper, die temper, etc.