1、AECMA STANDARD NORME AECMA AECMA NORM I I aecrna 19: prEN 3350 Edition P 2 October 1995 Declassification approved PUBLISHED BY THE EUROPEAN ASSOCIATION OF AEROSPACE INDUSTRIES (AECMA) Gulledelle 94 - B-1200 BRUXELLES - Tel. (32) 2 775 81 10 - Fax. (32) 2 775 81 11 C5 Chairman Comments should be sent
2、 within six months after the date of publication to ICs : Supersedes issue P 1 September 1991 Descriptors : ENGLISH VERSION Aerospace series Aluminium, aluminium alloys Temper designations Srie arospatiale Aluminium, alliages daluminium Dsignations des tats mtallurgiques Luft- und Raumfahrt Aluminiu
3、m, Aluminiumlegierungen Wrmebehandlungszustand (The European Association of on green paper for the needs of AECMA-Members. It ha experts of the concerned or functionally, without re-iden tifica tion Official Service European Standard to CEN (European Committee for Standardization) for formal vote. R
4、eplace page 1 of the previous issue by this page I I 1995-1 0-31 AECMA Gulledelle 94 B-1200 BRUXELLES Mr. ODORICO COPYRIGHT Association Europeene Des Constructeurs de Materiel AerospaceLicensed by Information Handling ServicesCopyright Association Europeene des Constructeurs de Materiel Aerospatial
5、Provided by IHS under license with AECMANot for ResaleNo reproduction or networking permitted without license from IHS-,-,-I AECMA PREN83350 91 1032311 0007335 3 prEN 3350 Page 2 Foreword : This European Standard is based upon “The Aluminum Association (AA) Temper Designation System“. The standard e
6、xtends the system to accomodate all current European requirements and gives in addition, some recommendations for further extensions of the T temper designations. . Contents 1 Scope and field of application 2 Definitions 3 Basis of codification 4 Basic temper designations 5 Subdivisions of O (anneal
7、ed) temper designations 6 7 Subdivisions of H (strain-hardened) temper designations Subdivisions of T (thermally treated to produce tempers other than F, O or H) temper designations 8 Summary COPYRIGHT Association Europeene Des Constructeurs de Materiel AerospaceLicensed by Information Handling Serv
8、icesCopyright Association Europeene des Constructeurs de Materiel Aerospatial Provided by IHS under license with AECMANot for ResaleNo reproduction or networking permitted without license from IHS-,-,-AECMA PREN*3350 91 LO123Ll O007136 5 = prEN 3350 Page 3 1 Scope and field of application This Europ
9、ean Standard establishes temper designations for all forms of wrought aluminium and aluminium alloys and for continuously cast aluminium and aluminium alloy rod and strip. Temper designations conforming to this standard for wrought aluminium and aluminium alloys and continuously cast aluminium and a
10、luminium alloy rod and strip may be standardized with CEN/TC 132 and AECMA/C 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 whic
11、h 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 : . test methods and limits for the characteristics, or I
12、 the specific practices used to produce the temper 2 Definitions 2.1 Cold working Plastic deformation of metal at such temperature and rate that strain-hardening occurs. 2.2 Strain hardening Modification of a metal structure by cold working resulting in an increase in strength and hardnes with loss
13、of ductility. 2.3 Solution heat treating Solution heat treating is achieved by heating the products to a suitable temperature, holding at that temperature long enough to allow constituents to enter into solid solution and cooling rapidly enough to hold the constituents in solution. 2.4 Ageing Precip
14、itation from solid solution resulting in a change in properties of an alloy, usually occurring slowly at room temperature (natural ageing) and more rapidly at elevated temperatures (artificial ageing). 2.5 Annealing A thermal treatment to soften metal by removal of strain-hardening or by coalescing
15、precipitates from solid solution. COPYRIGHT Association Europeene Des Constructeurs de Materiel AerospaceLicensed by Information Handling ServicesCopyright Association Europeene des Constructeurs de Materiel Aerospatial Provided by IHS under license with AECMANot for ResaleNo reproduction or network
16、ing permitted without license from IHS-,-,- AECMA PREN83350 93 W 30L23LL 0007337 7 prEN 3350 Page 4 3 Basis of codification 3.1 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 all
17、oy-temper-product combinations. 3.2 The temper designation follows the alloy designation, and is separated therefrom by a hyphen, 3.3 Basic temper designations consist of letters. If subdivisions of the basic tempers are required, these are indicated by one or more digits following the letter of the
18、 basic temper. These digits relate to a specific sequence of basic treatments, but only those treatments or operations recognized as significantly influencing the product characteristics are indicated. Should some other variation of the same sequence of basic operations be applied to the same alloy,
19、 resulting in different characteristics, then additional digits are added to the designation. 4 Basic temper designations 4.1 F - As fabricated This designation applies to the products of shaping processes in which no special control over thermal conditions or strain hardening is employed. For this
20、temper, there are no mechanical property limits. 4.2 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 1) 4.3 H - Strain hardened This designation applies to products subjected to the applicati
21、on of cold work after annealing (or 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 two digits indicating the final degree of strain-hardening (a third digit is used in som
22、e cases to identify special processing techniques). 4.4 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
23、 indicated; for example : W 1/2 h. 4.5 T - Thermally treated to produce stable tempers other than F, O or H 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 indi
24、cating the specific sequence of treatments. 11 Products achieving the required annealed properties after hot forming processes may be designated as O temper. COPYRIGHT Association Europeene Des Constructeurs de Materiel AerospaceLicensed by Information Handling ServicesCopyright Association Europeen
25、e des Constructeurs de Materiel Aerospatial Provided by IHS under license with AECMANot for ResaleNo reproduction or networking permitted without license from IHS-,-,-prEN 3350 Page 5 5 Subdivisions of O (annealed) temper designations 5.1 O1 - High temperature annealed and slow cooled This designati
26、on 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 accentuate ultrasonic response and provide dimensional stability. It is applicable to products which are to
27、be machined prior to solution heat treatment by the user. Mechanical property limits are not applicable. 5.2 02 - 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-piastica
28、lly formed prior to solution heat treatment by the user. 5.3 03 - Homogenized This designation applies to continuously cast rod 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
29、heat treatment. 6 Subdivisions of H (strain hardened) temper designations Subdivisions are made according to the basic operations described in 3.3 and the final degree of strain hardening, as follows : 6.1 follows : The first digit following the letter H indicates the specific combination of basic o
30、perations as -HI Strain hardened only : applies to products which are strain hardened to obtain the desired strength without supplementary thermal treatment. - H2 Strain hardened and partially annealed : applies to products which are strain hardened more than desired final amount and then reduced in
31、 strength to the desired level by partial annealing. For alloys that age-soften at room temperature, the H2 tempers have the same minimum ultimate tensile strength as the corresponding H3 tempers. For other alloys, the H2 tempers have the same minimum ultimate tensiie strength as the corresponding H
32、1 tempers and slightly higher elongation. - H3 Strain hardened and stabilized : applies 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 impro
33、ves ductility. This designation is applicable only to those alloys which, unless stabilized, gradually age-soften at room temperature. - H4 Strain hardened and lacquered or painted : applies to products which are strain hardened and which are subjected to some partial annealing during the subsequent
34、 painting or lacquering operation. 6.2 identified by the minimum value of the ultimate tensile strength. The second digit following the letter H indicates the final degree of strain hardening, as Numeral 8 has been assigned to the hardest tempers normally produced. The minimum tensile strength of te
35、mpers Hx8 may be determined from table 1 and is based on the minimum tensile strength of the alloy in the annealed temper. COPYRIGHT Association Europeene Des Constructeurs de Materiel AerospaceLicensed by Information Handling ServicesCopyright Association Europeene des Constructeurs de Materiel Aer
36、ospatial Provided by IHS under license with AECMANot for ResaleNo reproduction or networking permitted without license from IHS-,-,- AECMA PREN*3350 91 = 1012311 0007139 O prEN 3350 Page 6 Table 1 Minimum tensile strength in annealed temper (MPa) Increase in tensile strength to Hx8 temper (MPa) - up
37、 to 40 45 to 60 65 to 80 85 to 100 105 to 120 125 to 160 165 to 200 205 to 240 245 to 280 285 to 320 325 and over 55 65 75 85 90 95 1 O0 105 110 115 120 rempers between O (annealed and Hx8 are designated by numerals 1 through 7 : - numeral 4 designates tempers whose ultimate tensile strength is appr
38、oximately midway between that of the O temper and that of the Hx8 tempers, - numeral 2 designates tempers whose ultimate tensile strength is approximately midway between that of the O temper and that of the Hx4 tempers, - numeral 6 designates tempers whose ultimate tensile strength is approximately
39、midway between that of the Hx4 tempers and that of the Hx8 tempers, - numerals 1, 3, 5 and 7 designate, similarly, tempers intermediate between those defined above. Numeral 9 designates tempers whose minimum ultimate tensile strength exceeds that of the Hx8 tempers by 10 MPa or more. The ultimate te
40、nsile strength of intermediate tempers, determined as described above, when not ending in O or 5, shall be rounded.to the next higher O or 5. 6.3 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 b
41、oth 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 : - Hxll : applies to products which incur sufficient strain
42、 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 Hxl . - HI 12 : applies to products which may acquire some temper from working at an elevated temperature or from a limited amount of cold work,
43、 and for which there are mechanical property limits. - HI 16 : applies to products made of those alloys of the 5xxx group in which the magnesium content is 4 % or more, and for which there are mechanical property limits and a specified resistance to exfoliation corrosion. - Hxx4 : apply to patterned
44、 or embossed sheet and strip fabricated from the corresponding Hxx temper, For example : an embossed sheet fabricated from an H42 temper is designated H424, COPYRIGHT Association Europeene Des Constructeurs de Materiel AerospaceLicensed by Information Handling ServicesCopyright Association Europeene
45、 des Constructeurs de Materiel Aerospatial Provided by IHS under license with AECMANot for ResaleNo reproduction or networking permitted without license from IHS-,-,-AECMA PREN*K3350 91 1012311 0007140 7 = prEN 3350 Page 7 - HI 14 applies to products fabricated from O, Hxl, HI 11 or HI 12 tempers. T
46、he mechanical properties of the specified temper may deviate (after embossing or engraving) from those of the original temper. - 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. T
47、hey are specified in the relevant standard for welded tube. 6.4 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 the need arises. 7 Subdivisions of T (thermally
48、 treated to produce tempers other than F. O or H) temper designations 7.1 The first digit following the letter T is used to identify the specific sequences of b treatments. Numerals 1 through 9 have been assigned as follows 21 : sic - TI - Cooled from an elevated temperature shaping process and natu
49、rally 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
