| F |
As fabricated. Applies to products in which no thermal treatments or
strain-hardening methods are used to shaped the product.
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| H |
Strain-hardened (wrought products only). Applies to products which have
their strength increased by strain-hardening, with or without additional
thermal treatments to produce a reduction in strength.
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| H1 |
Strain-hardened only. Applies to products which are strain-hardened to
achieve the strength desired without additional thermal treatment.
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| H1x,H2x,H3x |
The second digit (x) following the designations H1, H2, H3 indicates the final degree of strain hardening and can range from 0 to 8. The number 8 has been assigned to tempers having a final degree of strain-hardening equivalent to that resulting from approxiamtely 75% reduction in area. Tempers between 0 (annealed) and 8 (full-hard) are designated by the numbers 1 through 7. A number 4 (which is halfway between 0 and 8) designation is considered half-hard; number 2 is considered quarter-hard; and the number 6 is three-quarter hard. When the number is odd, the limits of ultimate strength are exactly halfway between those of the even numbered tempers.
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| Hxxx |
The third digit indicates a variation of the two digit H temper. It is used when the degree of temper is close to the 2 digit H temper.
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| H111 |
Applies to alloys which are strain-hardened less than the amount required
for a controlled H11 temper.
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| H112 |
Applies to alloys that acquire some temper from shaping processes which
do not have special control over the amount of strain-hardening or
thermal treatment, but for which there are mechanical property limits.
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| H2 |
Strain-hardened and partially annealed. Applies to alloys which are
strain-hardened more than the desired final amount and then reduced in
strength to the desired level by partial annealing. For alloys that soften
with age at room temperature, the H2 tempers have the same minimum
tensile strength as the corresponding H3 tempers. For other alloys, the
H2 tempers have the same minimum tensile strength as the
corresponding H1 tempers and slightly higher elongation.
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|
| H3 |
Strain-hardened and stabilized. Applies to alloys that are strain-hardened
and whose mechanical properties are stabilized by a low temperature
thermal treatment that results in slightly lowered tensile strength and
improved ductility. This designation is applicable only to those alloys that
unless they are stabilized, will gradually soften with age at room
temperature.
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|
| H311 |
Applies to alloys which are strain-hardened less than the amount required
for a controlled H31 temper.
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|
| H321 |
Applies to alloys which are strain-hardened less than the amount required
for a controlled H32 temper.
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| H323 |
Applies to products which are fabricated to have good resistance to stress
corrosion cracking.
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| H343 |
Applies to products which are fabricated to have good resistance to stress
corrosion cracking.
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|
| O |
Annealed, recrystallized (wrought products only). Applies to wrought
alloys which are annealed to obtain the softest temper, and to cast alloys
which are annealed to improve ductility and dimensional stability.
|
|
| T |
Thermally treated to produce stable tempers other than F, O or H. Applies
to products which are thermally treated, with or without additional
strain-hardening, to produce stable tempers.
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|
| T1 |
Naturally aged to a substantially stable condition. Applies to alloys which
are not cold worked after cooling from a high temperature shaping
process, or in which the effect of cold working in flattening or straightening
may not be significant in mechanical property limits.
|
|
| T2 |
Annealed (cast products only). Applies to alloys which are cold worked to
improve strength after cooling from an elevated temperature shaping
process, or in which the effect of cold work in flattening or straightening is
significant in mechanical property limits.
|
|
| T3 |
Solution heat-treated and then cold worked. Applies to alloys which are
cold worked to improve strength after solution heat treatment, or in
which the effect of cold work in flattening or straightening is significant in
mechanical property limits.
|
|
| T4 |
Solution heat-treated and naturally aged to a substantially stable
condition. Applies to alloys which are not cold worked after solution heat
treatment, or in which the effect of cold work in flattening or straightening
may not be significant in mechanical property limits. T42 indicates material
is solution heat treated from the O or F temper to demonstrate response
to heat-treatment, and naturally aged to a substantially stable condition.
|
|
| T5 |
Artificially aged only. Applies to alloys which are not cold worked after
cooling from an elevated temperature shaping process, or in which the
effect of cold work in flattening or straightening may not be significant in
mechanical property limits.
|
|
| T51 |
Stress relieved by stretching. Applies to the following products when
stretched the indicated amounts after solution heat-treatment or cooled
from a high temperature shaping process: Plate—1.5-3% permanent set;
Rod, bar, shapes, and extruded tubes—1-3% permanent set; Drawn tubes—
1.5-3% permanent set. Applies directly to plate, and rolled or cold finished
rod and bar which receive no further straightening after stretching. Applies
to extruded rod, bar, shapes, tubing, and to drawn tubing when
designated as follows: T510 Products that receive no further
straight ending after stretching; T511 Products that may receive minor
straightening after stretching to comply with standard tolerances.
|
|
| T52 |
Stress-relieved by compressing. Applies to alloys which are stress-relieved
by compressing after solution heat-treatment, or cooled from a high
temperature shaping process to produce a permanent set of 1 to 5%.
|
|
| T54 |
Stress-relieved by combined stretching and compressing. Applicable to die
forging which are stress-relieved by restriking cold in the finish die.
|
|
| T6 |
Solution heat-treated and then artificially aged. Applies to alloys which are
not cold worked after solution heat-treatment, or in which the effect of
cold work in flattening or straightening may not be significant in
mechanical property limits. T62 indicates material is solution heat-treated
from the O or F temper to demonstrate response to heat-treatment, and
artificially aged.
|
|
| T7 |
Solution heat-treated and then stabilized. Applies to products which are
stabilized after solution heat-treatment to carry them beyond the point of
maximum strength to provide control of some special property.
|
|
| T8 |
Solution heat-treated, cold worked, and then artificially aged. Applies to
products which are cold worked to improve strength, or in which the
effect of cold work in flattening or straightening is significant in mechanical
property limits.
|
|
| T9 |
Solution heat-treated, artificially aged, and then cold worked. Applies to
alloys which are cold worked to improve strength.
|
|
| T10 |
Artificially aged and then cold worked. Applies to products which are cold
worked to improve strength, or in which the effect of cold work in
flattening or straightening is significant in mechanical property limits.
|
|
| T42 |
(Wrought products only). Applicable to products solution heat-treated and
naturally aged which have mechanical properties different from those of
the T4 temper.
|
|
| T62 |
(Wrought products only). Applicable to products solution heat-treated and
artificially aged which have mechanical properties different from those of
the T6 temper.
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|
| W |
Solution heat treated. An unstable temper applied only to alloys which
spontaneously age at room temperature after solution heat-treatment.
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