Temper

The condition produced in a metal by mechanical or thermal treatment and having characteristic structure and mechanical properties.

1) Annealed Tempers - Tempers produced by annealing and usually defined by a nominal grain size or grain size range. The most commonly specified nominal annealed tempers are as follows:

0.015mm 0.050mm 0.025mm 0.070mm 0.035mm 0.100mm

Certain alloys not composed entirely of alpha grains do not lend them-selves to classification under the above listed tempers. The terms "Light Anneal" and "Soft Anneal" are also commonly used. Their mechanical properties are defined by applicable specifications.

2) Annealed to Temper - Metal annealed to a tensile strength or Rockwell specification approximately equal to that specification normally met by rolling to temper. This temper provides greater ductility and better finish at same tensile strength. Not available in all alloys and restricted to Half Hard temper or softer. Metal need not be fully recrystallized.

3) Rolled Tempers - a) For flat products, these tempers are designated by the following terms and defined in applicable specifications:

Eighth Hard Quarter Hard Half Hard Hard Extra Hard

Three Quarter Hard Spring Extra Spring Ultra Spring Super Spring

b) For tube, the temper designations commonly used are Light Drawn, Drawn (general purpose) and Hard Drawn, and are defined in applicable specifications.

i) Light Drawn Temper - Generally applied to tube where some degree of stiffness is desired without serious impairment of bending qualities.

ii) Drawn (General Purpose) Temper - Applicable to tube only, commonly used where there is no real requirement for high strength or hardness on the one hand or for bending qualities on the other.

iii) Hard Drawn Temper - Used only where there is need for a tube as hard or as strong as is commercially feasible for the size in question.

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