MIL-DTL-46027K(MR)
6.5.1.3 `H' Strain Hardened (applied to wrought products only). Used for products that
have been strengthened by strain hardening, with or without subsequent heat treatment.
The designation is followed by two or more numbers as discussed below.
6.5.1.4 `W' Solution Heat Treated. This is seldom encountered because it is an unstable
temper that applies only to alloys that spontaneously age at ambient temperature after
heat treatment.
6.5.1.5 `T' Solution Heat Treated. Used for products that have been strengthened by
heat treatment, with or without subsequent strain hardening. The designation is followed
by one or more numbers as discussed below.
6.5.2 `T' Temper Codes. Additional digits may be used after the first T temper digit to
indicate subsequent stress relieving by processes such as stretching, compressing, or a
combination of the two.
6.5.2.1 T1. Cooled from an elevated temperature shaping process and naturally aged to a
substantially stable condition.
6.5.2.2 T2. Cooled from an elevated temperature shaping process, cold worked, and
naturally aged to a substantially stable condition.
6.5.2.3 T3. Solution heat treated, cold worked, and naturally aged to a substantially
stable condition.
6.5.2.4 T4. Solution heat treated, and naturally aged to a substantially stable condition.
6.5.2.5 T5. Cooled from an elevated temperature shaping process then artificially aged.
6.5.2.6 T6. Solution heat treated then artificially aged.
6.5.2.7 T7. Solution heat treated then and overaged/stabilized.
6.5.2.8 T8. Solution heat treated, cold worked, then artificially aged.
6.5.2.9 T9. Solution heat treated, artificially aged, then cold worked.
6.5.2.10 T10. Cooled from an elevated temperature shaping process, cold worked, then
artificially aged.
6.5.3 H Temper Strain Hardening Codes. The second digit (required) after the first H
temper digit indicates the level of strain hardening and is based on the minimum ultimate
tensile strength obtained. The third digit (optional) is a variation of the two digit temper.
6.5.3.1 H1. Strain hardened only
6.5.3.2 H2. Strain hardened and partially annealed
14
For Parts Inquires call Parts Hangar, Inc (727) 493-0744
© Copyright 2015 Integrated Publishing, Inc.
A Service Disabled Veteran Owned Small Business