Aluminium and aluminium alloys - Wrought products - Temper designations

This European Standard establishes temper designation for all forms of wrought aluminium and aluminium alloys and to continuously cast aluminium alloy drawing stock and strip intended to be wrought.

Aluminium und Aluminiumlegierungen - Halbzeug - Bezeichnungen der Werkstoffzustände

Diese Europäische Norm legt die Bezeichnungen der Werkstoffzustände für alle Formen von Halbzeug (Kneterzeugnisse) aus Aluminium und Aluminium-Knetlegierungen sowie für kontinuierlich gegossene Vormaterialien und Bänder (Gießdraht und Gießbänder) aus Aluminium und Aluminiumlegierungen fest.
ANMERKUNG   Einige dieser Bezeichnungen der Werkstoffzustände können Gegenstand eines Patentes oder von Patent-anwendungen sein und ihre Auflistung in dieser Norm bedeutet jedoch keinesfalls, dass dadurch eine Lizenz-übertragung unter diesem Patentrecht erfolgt.
Zusätzliche Bezeichnungen der Werkstoffzustände nach dieser Norm dürfen unter folgenden Voraus-setzungen in CEN/TC 132 und AECMA/5 genormt werden:
-   der Werkstoffzustand wird von mehr als einem Verbraucher angewendet bzw. steht zur Anwendung zur Verfügung;
-   die Grenzwerte der mechanischen Eigenschaften sind festgelegt;
-   die Eigenschaften des Werkstoffzustandes unterscheiden sich deutlich von denjenigen aller anderen Werkstoffzustände, deren Grundbehandlungen in gleicher Reihenfolge ablaufen, und für die Bezeichnungen bereits für die gleiche Legierung und das gleiche Erzeugnis vergeben wurden;
-   die folgenden Punkte werden auch festgelegt, sofern andere Merkmale als die mechanischen Eigenschaften als wesentlich angesehen werden:
a)   Prüfverfahren und Grenzwerte dieser Eigenschaften; oder
b)   die spezifischen Verfahren zur Erzielung des Werkstoffzustands.

Aluminium et alliages d'aluminium - Produits corroyés - Désignation des états métallurgiques

La présente Norme européenne établit la désignation des états métallurgiques de toutes les formes en aluminium et alliages d’aluminium corroyés, et des bandes et fils machine en aluminium et alliages d’aluminium coulés en continu et destinés à être corroyés.
NOTE   Certaines de ces désignations d’états métallurgiques peuvent faire l’objet de brevets ou de demandes de brevets, et leur inclusion dans la présente norme ne doit être en aucune façon considérée comme l’attribution d’une licence en regard des droits attachés à de tels brevets.
Des désignations d’états métallurgiques supplémentaires, conformes à la présente norme, peuvent être normalisées auprès du CEN/TC 132 et de l’AECMA/5 à condition que :
-   l’état métallurgique soit utilisé ou soit disponible pour être utilisé par plus d’un utilisateur ;
-   les limites de propriétés mécaniques soient définies ;
-   les caractéristiques de l’état considéré soient significativement différentes de celles de tous les autres états ayant la même séquence de traitements de base et pour lesquels des désignations ont déjà été attribuées pour les mêmes alliage(s) et produit(s) ;
-   soient également définies, dans le cas où des caractéristiques autres que les propriétés mécaniques sont jugées significatives :
a)   les méthodes d’essai et les limites pour ces caractéristiques ; ou
b)   les pratiques spécifiques utilisées pour produire l’état métallurgique.

Aluminij in aluminijeve zlitine - Gneteni izdelki - Označevanje stanj

Ta evropski standard določa označevanje stanj za vse oblike gnetenega aluminija in njegovih zlitin ter neprekinjeno lite žice in trakove iz aluminijeve zlitine, namenjene za gnetenje.

General Information

Status
Published
Public Enquiry End Date
09-Dec-2015
Publication Date
04-Apr-2017
Technical Committee
Current Stage
6060 - National Implementation/Publication (Adopted Project)
Start Date
29-Mar-2017
Due Date
03-Jun-2017
Completion Date
05-Apr-2017

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SLOVENSKI STANDARD
SIST EN 515:2017
01-maj-2017
1DGRPHãþD
SIST EN 515:1998
$OXPLQLMLQDOXPLQLMHYH]OLWLQH*QHWHQLL]GHONL2]QDþHYDQMHVWDQM
Aluminium and aluminium alloys - Wrought products - Temper designations
Aluminium und Aluminiumlegierungen - Halbzeug - Bezeichnungen der
Werkstoffzustände
Aluminium et alliages d'aluminium - Produits corroyés - Désignation des états
métallurgiques
Ta slovenski standard je istoveten z: EN 515:2017
ICS:
77.150.10 Aluminijski izdelki Aluminium products
SIST EN 515:2017 en

2003-01.Slovenski inštitut za standardizacijo. Razmnoževanje celote ali delov tega standarda ni dovoljeno.

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SIST EN 515:2017
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SIST EN 515:2017
EN 515
EUROPEAN STANDARD
NORME EUROPÉENNE
March 2017
EUROPÄISCHE NORM
ICS 01.040.77; 77.120.10; 77.150.01 Supersedes EN 515:1993
English Version
Aluminium and aluminium alloys - Wrought products -
Temper designations

Aluminium et alliages d'aluminium - Produits corroyés Aluminium und Aluminiumlegierungen - Halbzeug -

- Désignation des états métallurgiques Bezeichnungen der Werkstoffzustände
This European Standard was approved by CEN on 6 February 2017.

CEN members are bound to comply with the CEN/CENELEC Internal Regulations which stipulate the conditions for giving this

European Standard the status of a national standard without any alteration. Up-to-date lists and bibliographical references

concerning such national standards may be obtained on application to the CEN-CENELEC Management Centre or to any CEN

member.

This European Standard exists in three official versions (English, French, German). A version in any other language made by

translation under the responsibility of a CEN member into its own language and notified to the CEN-CENELEC Management

Centre has the same status as the official versions.

CEN members are the national standards bodies of Austria, Belgium, Bulgaria, Croatia, Cyprus, Czech Republic, Denmark, Estonia,

Finland, Former Yugoslav Republic of Macedonia, France, Germany, Greece, Hungary, Iceland, Ireland, Italy, Latvia, Lithuania,

Luxembourg, Malta, Netherlands, Norway, Poland, Portugal, Romania, Serbia, Slovakia, Slovenia, Spain, Sweden, Switzerland,

Turkey and United Kingdom.
EUROPEAN COMMITTEE FOR STANDARDIZATION
COMITÉ EUROPÉEN DE NORMALISATION
EUROPÄISCHES KOMITEE FÜR NORMUNG
CEN-CENELEC Management Centre: Avenue Marnix 17, B-1000 Brussels

© 2017 CEN All rights of exploitation in any form and by any means reserved Ref. No. EN 515:2017 E

worldwide for CEN national Members.
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EN 515:2017 (E)
Contents Page

European foreword ....................................................................................................................................................... 3

1 Scope .................................................................................................................................................................... 4

2 Normative references .................................................................................................................................... 4

3 Terms and definitions ................................................................................................................................... 4

4 Basis of codification ....................................................................................................................................... 6

5 Basic temper designations ........................................................................................................................... 6

5.1 F – as fabricated ............................................................................................................................................... 6

5.2 O - Annealed ...................................................................................................................................................... 6

5.3 H – Strain-hardened ....................................................................................................................................... 6

5.4 W – Solution heat-treated ............................................................................................................................ 7

5.5 T - Thermally treated to produce stable tempers other than F, O or H (for heat-treatable

alloys only) ........................................................................................................................................................ 7

6 Subdivision of O (annealed) temper designations .............................................................................. 7

6.1 O1 – High temperature annealed and slow cooled ............................................................................. 7

6.2 O – Thermo-mechanically processed ..................................................................................................... 7

6.3 O3 – Homogenized .......................................................................................................................................... 7

7 Subdivision of H (strain-hardened) temper designations ............................................................... 7

8 Subdivision of T (thermally treated to produce stable tempers other than F, O or H)

temper designations ................................................................................................................................... 10

8.1 First digit after T ........................................................................................................................................... 10

8.2 Additional digits added to designations T1 to T10 .......................................................................... 12

8.3 Assigned additional digits for stress-relieved T tempers ............................................................. 12

8.3.1 Stress-relieved by stretching ................................................................................................................... 12

8.3.2 Stress-relieved by compressing .............................................................................................................. 13

8.3.3 Stress-relieved by combined stretching and compressing ........................................................... 13

8.3.4 Assigned additional digits for stress-relieved W tempers ............................................................ 13

8.4 Assigned additional digits for variations of T7 type tempers ...................................................... 13

8.5 Demonstration of response to heat treatment .................................................................................. 14

8.5.1 Temper designations for producer/supplier — Laboratory demonstration of response to

heat treatment............................................................................................................................................... 14

8.5.2 Temper designations for producer/supplier — Demonstration of response to temper

conversion ...................................................................................................................................................... 14

8.5.3 Temper designations for purchaser/user heat treatment ........................................................... 14

9 Summary ......................................................................................................................................................... 14

Annex A (informative) Recommendations for further T tempers extensions ...................................... 23

A.1 Numeral 1 as a second digit after T ....................................................................................................... 23

A.2 Numerals 1 and 3 to 9 as a second digit after T3, T8 or T9 ........................................................... 23

A.3 Numerals 1 and 3 to 5 as a second digit after T5 or T6 .................................................................. 23

A.4 Numeral 6 as a second digit after T5 or T6 ......................................................................................... 23

A.5 Summary of possible uses of a second digit after T ......................................................................... 23

Bibliography ................................................................................................................................................................. 25

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EN 515:2017 (E)
European foreword

This document (EN 515:2017) has been prepared by Technical Committee CEN/TC 132 “Aluminium and

aluminium alloys”, the secretariat of which is held by AFNOR.

This European Standard shall be given the status of a national standard, either by publication of an identical

text or by endorsement, at the latest by September 2017, and conflicting national standards shall be

withdrawn at the latest by September 2017.

Attention is drawn to the possibility that some of the elements of this document may be the subject of patent

rights. CEN shall not be held responsible for identifying any or all such patent rights.

This document supersedes EN 515:1993.
The following modifications were implemented in this new version of EN 515:
— Addition of Clause 2 “Normative references”;
— new definitions and sources in Clause 3;
— new precision in Subclauses 6.1, 7 and 7.3;
— new Table 1 and modification of Table 2;
— improvement of the content of Clause 8.4;
— modification of Figure 1;

— inclusion of new tempers in Table 3: T552, T554, T72, T72510, T72511, T74511, T7452, T7454, T7752,

T7754, T7852, T7854, T7952 and T7954;
— modification of new tempers in Table 3: H131, T3510;
— updating Annex A.

According to the CEN-CENELEC Internal Regulations, the national standards organisations of the following

countries are bound to implement this European Standard: Austria, Belgium, Bulgaria, Croatia, Cyprus, Czech

Republic, Denmark, Estonia, Finland, Former Yugoslav Republic of Macedonia, France, Germany, Greece,

Hungary, Iceland, Ireland, Italy, Latvia, Lithuania, Luxembourg, Malta, Netherlands, Norway, Poland,

Portugal, Romania, Serbia, Slovakia, Slovenia, Spain, Sweden, Switzerland, Turkey and the United Kingdom.

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EN 515:2017 (E)
1 Scope

This European Standard establishes temper designations for all forms of wrought aluminium and aluminium

alloys and for continuously cast aluminium and aluminium alloys drawing stock and strip intended to be

wrought.

NOTE Some of these temper designations may be subject of patent or patent applications and their listing herein is

not to be construed in any way as the granting of a license under such patent right.

Additional temper designations, conforming to this standard, may be standardized with CEN/TC 132 and

AECMA/5 provided:
— the temper is used or is available for use by more than one user;
— mechanical property limits are defined;

— the characteristics of the temper are significantly different from those of all other tempers which have

the same sequence of basic treatments and for which designations already have been assigned for the

same alloy and product;

— the following are also defined if characteristics other than mechanical properties are considered

significant:
a) test methods and limits for the characteristics; or
b) the specific practices used to produce the temper.
2 Normative references
Not applicable.
3 Terms and definitions
For the purposes of this document, the following terms and definitions apply.
3.1
temper

condition of the metal produced by mechanical and/or thermal processing, typically characterized by a

certain structure and specified properties
[SOURCE: EN 12258-1:2012, 3.6.5]
3.2
hot working
forming of a solid metal after preheating
Note 1 to entry: Strain hardening may or may not occur during hot working.
[SOURCE: EN 12258-1:2012, 3.2.3]
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3.3
cold working
forming of a solid metal without preheating

Note 1 to entry: Plastic deformation of metal at such temperature and strain-rate that strain-hardening occurs.

[SOURCE: EN 12258-1:2012, 3.2.4]
3.4
strain hardening

modification of a metal structure by cold working resulting in an increase in strength and hardness with loss

of ductility
[SOURCE: EN 12258-1:2012, 3.2.11]
3.5
solution heat treatment

heating an alloy to a suitable temperature for sufficient time to allow one or more soluble constituents to

enter into solid solution, where they are retained in a supersaturated state after quenching

[SOURCE: EN 12258-1:2012, 3.7.1]
3.6
ageing

treatment of a metal aiming at a change in its properties by precipitation of intermetallic phases from

supersaturated solid solution

Note 1 to entry: Ageing can be a treatment at room temperature (natural ageing) or a thermal treatment (artificial

ageing).
Note 2 to entry: In North America the term “aging” is used.
[SOURCE: EN 12258-1:2012, 3.7.15]
3.7
annealing

thermal treatment to soften metal by reduction or removal of strain hardening resulting from cold working

and/or by coalescing precipitates from the solid solution
[SOURCE: EN 12258-1:2012, 3.6.6]
3.8
heat-treatable alloy
alloy capable of being strengthened by suitable thermal treatment

Note 1 to entry: In addition to cold working, heat-treatable alloys are typically strengthened by precipitation

hardening.
[SOURCE: EN 12258-1:2012, 2.2.8]
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EN 515:2017 (E)
3.9
non heat-treatable alloy
alloy which is not strengthened by thermal treatment

Note 1 to entry: Non-heat-treatable alloys are only strengthened by hot or cold working.

[SOURCE: EN 12258-1:2012, 2.2.9]
3.10
stress relieving
reduction of internal residual stresses by thermal or mechanical means
[SOURCE: EN 12258-1:2012, 3.2.8]
4 Basis of codification

4.1 The temper designations are based on the sequences of basic treatments used to produce the various

tempers. Property (mechanical or physical) limits apply to individual alloy-temper-product combinations.

4.2 The temper designation follows the alloy designation; these are separated by a hyphen.

4.3 Basic temper designations consists of letters. If subdivisions of the basic tempers are required, these

are indicated by one or more digits following the letter of the basic temper. These digits relate to a specific

sequence of basic treatments, but only those treatments or operations recognized as significantly influencing

the products characteristics are indicated.

Should some other variation of the same sequence of basic operations be applied to the same alloy, resulting

in different characteristics, then additional digits are added to the designation.

5 Basic temper designations
5.1 F – as fabricated

This designation applies to the products of shaping processes in which no special control over thermal

conditions or strain hardening is applied. For this temper, there are no mechanical property limits specified.

5.2 O - Annealed

This designation applies to products which are annealed to obtain the lowest strength temper. The O may be

followed by a digit other than zero .
5.3 H – Strain-hardened

This designation applies to products subjected to the application of cold work after annealing (or after hot

forming), or to a combination of cold work and partial annealing or stabilizing, in order to secure the

specified mechanical properties. The letter H is always followed by at least two digits, the first indicating the

specific combination of basic operations and the second indicating the degree of strain hardening. A third

digit indicates the variation of a two digits temper and it is used when mechanical properties, or others

characteristics, differ from those of the two digits H temper to which it is added.

Products achieving the required annealed properties after hot forming processes may be designated as O temper.

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5.4 W – Solution heat-treated

This designation describes an unstable temper. It applies only to alloys which spontaneously age at room

temperature after solution heat-treatment. This designation is specific only when the period of natural

ageing is indicated; for example W 1/2 h.

5.5 T - Thermally treated to produce stable tempers other than F, O or H (for heat-treatable

alloys only)

This designation applies to products which are thermally treated, with or without supplementary strain-

hardening, to produce stable tempers. The T is always followed by one or more digits indicating the specific

sequence of treatments.
6 Subdivision of O (annealed) temper designations
6.1 O1 – High temperature annealed and slow cooled

This designation applies to wrought products which are thermally treated at approximately the same time

and temperature required for solution heat-treatment and slow cooled to room temperature, in order to

generate the correct ultrasonic response and / or provide dimensional stability. It is applicable to products

which are to be machined prior to solution heat treatment by the user. Mechanical property limits are not

specified.
6.2 O2 – Thermo-mechanically processed

This designation applies to wrought products subjected to a special thermo-mechanical treatment. It is

applicable to products which are to be super-plastically formed prior to solution heat treatment by the user.

6.3 O3 – Homogenized

This designation applies to continuously cast drawing stock or strip, which are subjected to a high

temperature soaking treatment to eliminate or reduce segregations, thus improving subsequent formability

and or response to solution heat-treatment.
7 Subdivision of H (strain-hardened) temper designations

Subdivisions are made according to the basic operations described in 5.3 and the final degree of strain

hardening, as follows:
7.1 First digit after H:

The first digit following the letter H indicates the specific combination of basic operations as follows:

— H1x Strain hardened only

These designations apply to products which are strain-hardened to obtain the desired strength without

supplementary thermal treatment.
Formerly designated as T41.
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— H2x Strain-hardened and partially annealed

These designations apply to products which are strain-hardened more than the desired final amount

and then reduced in strength to the desired final level by partial annealing. For alloys that age-soften at

room temperature, the H2x tempers have the same minimum ultimate tensile strength as the

corresponding H3x tempers. For other alloys, the H2x tempers have the same minimum ultimate tensile

strength as the corresponding H1x tempers and slightly higher elongation.
— H3x Strain-hardened and stabilized

These designations apply to products which are strain-hardened and whose mechanical properties are

stabilized either by a low temperature thermal treatment or as a result of heat introduced during

fabrication. Stabilization usually improves ductility. This designation is applicable only to those alloys

which, unless stabilized, gradually age-soften at room temperature.
— H4x Strain-hardened and lacquered or painted.

These designations apply to products which are strain-hardened and which may be subjected to some

partial annealing during the thermal curing which follows the painting or lacquering operation.

7.2 Second digit after H:

The second digit following the letter H indicates the final degree of strain hardening, as identified by the

minimum value of the ultimate tensile strength.

— Numeral 8 has been assigned to the hardest tempers normally produced. The minimum tensile strength

of tempers Hx8 may be determined from Table 1 and is based on the minimum tensile strength of the

alloy in the annealed temper.
— Tempers between O (annealed) and Hx8 are designated by numerals 1 to 7.

a) Numeral 2 designates tempers whose ultimate tensile strength is approximately midway between

that of the O temper and that of the Hx4 temper.

b) Numeral 4 designates tempers whose ultimate tensile strength is approximately midway between

that of the O temper and that of the Hx8 temper.

c) Numeral 6 designates tempers whose ultimate tensile strength is approximately midway between

that of the Hx4 temper and that of the Hx8 temper.

d) Numeral 1, 3, 5 and 7 designate, similarly, tempers intermediate between those defined above.

— Numeral 9 designates tempers whose ultimate tensile strength exceeds that of the Hx8 temper by

10 MPa or more.

— The ultimate tensile strength of intermediate tempers, determined as described above, when not ending

in 0 or 5, shall be rounded to the next higher 0 or 5.
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EN 515:2017 (E)
Table 1 — Determination of Hx8 minimum tensile strength
Minimum tensile strength in annealed Increase in tensile strength to Hx8 temper
temper
MPa
MPa
up to 40 55
45 to 60 65
65 to 80 75
85 to 100 85
105 to 120 90
125 to 160 95
165 to 200 100
205 to 240 105
245 to 280 110
285 to 320 115
325 and over 120
7.3 Third digit after H:

The third digit, when used, indicates a variation of a two digit temper. It is used when the degree of control

of temper or the mechanical properties or both differ from, but are close to that (or those) for the two digit H

temper designation to which it is added, or when some other characteristic is significantly affected.

The following three digit H temper designations have been assigned:

— Hx11: applies to products which incur sufficient strain-hardening after the final anneal that they fail to

qualify as annealed but not so much or so consistent an amount of strain hardening that they qualify as

Hx1.

— H112: Applies to products which may acquire some strain hardening from working at an elevated

temperature or from a limited amount of cold work, and for which there are mechanical property limits.

— H116: applies to products, made of those alloys of the 5xxx group in which the magnesium content is

3 % nominal or more. These products are strain hardened at the last operation to specified stable tensile

property limits, and to meet specified levels of corrosion resistance in accelerated-type corrosion test.

Corrosion tests include inter-granular and exfoliation test. This temper is suitable for continuous service

at temperatures not greater than 65 °C.

— H321: applies to products, made of those alloys of the 5xxx group in which the magnesium content is

3 % nominal or more. These products are thermally stabilized at the last operation to specified stable

tensile property limits, and to meet specified levels of corrosion resistance in accelerated-type corrosion

test. Corrosion tests include inter-granular and exfoliation test. This temper is suitable for continuous

service at temperatures not greater than 65 °C.

— H1x8: Applies to products manufactured from alloys in the 5xxx series group, for which the magnesium

content is 3 % nominal or more. These products are strain hardened at the last operation to specified

stable tensile property limits, and are capable of meeting specified levels of corrosion resistance in

accelerated type corrosion tests after a thermal treatment that is intended to demonstrate improved

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corrosion performance in ambient conditions. This temper is suitable for continuous service at

temperatures no greater than 65 °C”. Corrosion tests include inter-granular and exfoliation test.

— H131: applies to products, made of those alloys of the 5xxx group in which the magnesium content is

3 % nominal or more. These products are strain hardened to specified tensile property limits, and to

meet specified levels of corrosion resistance and ballistic performance.

— Hxx4: apply to patterned or embossed sheet and strip fabricated from the corresponding Hxx temper.

The mechanical properties of the specified temper may deviate (after embossing or engraving) from

those of the original temper. H114 applies to products fabricated from O, Hx1, H111 or H112 tempers.

EXAMPLE an embossed sheet fabricated from an H42 temper is designated H424;

— Hxx5: apply to welded tube. Depending on alloy and geometry of the tube, the mechanical property

limits may differ from those of the corresponding Hxx temper for strip.
7.4 Other digits after H:

If necessary, other or additional digits may be used to identify other variations of a subdivision of basic

temper H. Such additional identification will be allocated to specific alloys as a need arises.

8 Subdivision of T (thermally treated to produce stable tempers other than F, O or

H) temper designations
8.1 First digit after T

The first digit following the letter T is used to identify the specific sequences of basic treatments. Numerals 1

to 10 have been assigned as follows :

— T1: cooled from an elevated temperature shaping process and naturally aged to a substantially stable

condition.

This designation applies to products 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 recognized in mechanical property limits.

— T2: Cooled from an elevated temperature shaping process, cold worked and naturally aged to a

substantially stable condition.

This designation applies to products which are cold worked to improve strength after solution heat-

treatment, or in which the effect of cold work in flattening or straightening is recognized in mechanical

property limits.

A period of natural ageing at room temperature may occur between or after the operations listed for T tempers. Control of this

period is exercised when it is metallurgically important.
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— T3: Solution heat-treated , cold worked and naturally aged to a stable condition.

This designation applies to products which are cold worked to improve strength after solution heat-

treatment, or in which the effect of cold work in flattening or straightening is recognized in mechanical

property limits.

— T4: Solution heat-treated and naturally aged to a substantially stable condition.

This designation applies to products which are not cold worked after solution heat-treatment, or in

which the effect of cold work in flattening or straightening may not be recognized in mechanical

property limits.

— T5: Cooled from an elevated temperature shaping process and then artificially aged.

This designation applies to products 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 recognized in mechanical property limits.
— T6: Solution heat treated and then artificially aged.

This designation applies to products which are not cold worked after solution heat-treatment, or in

which the effect of cold work in flattening or straightening may not be recognized in mechanical

property limits.
— T7: Solution heat treated and over-aged/stabilized.

This designation applies to products which are artificially aged after solution heat-treatment to carry

them beyond a point of maximum strength to provide control of some significant characteristic other

than mechanical properties .
— T8: Solution heat-treated , cold worked and then artificially aged.

This designation applies to products which are cold worked to improve strength, or in which the effect

of cold work in flattening or straightening is recognized in mechanical property limits.

— T9: Solution heat-treated , artificially aged which are then cold worked.
This designation applies to products which are cold worked to improve strength.

— T10: Cooled from an elevated temperature shaping process, cold worked and artificially aged.

This designation applies to products which are cold worked after cooling from an elevated temperature

shaping process, or in which effect of cold work, in flattening or straightening, is recognized in

mechanical property limits.
The above definitions are summarized in Table 2.

Some 6000 or 7000 series alloys attain the same specified mechanical properties whether furnace solution heat treated or cooled

from an elevated temperature shaping process with a cooling rate rapid enough to hold constituents in supersaturated solution. In

such cases, when allowed by material specifications or purchaser, the temper designations T3, T4, T6, T7, T8 and T9 are used to

apply to either process and are appropriate designations, provided the process is controlled to ensure that the product needs

specified mechanical properties and, if specified, any other properties (eg: corrosion resistance).

The test method and limit used to evaluate material to this characteristic are specified at the time of the temper definition.

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EN 515:2017 (E)
Table 2 — Summary of processing for ac
...

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