EN586-2-1994-锻造机械性能

EN586-2-1994-锻造机械性能
EUROPEAN STANDARD NORME EUROPéENNE EUROP?ISCHE NORM
EN 586-2
June 1994
UDC 669.71:669.715.018.26:620.17
Descriptors: Aluminium, aluminium alloys, forgings, specifications, characteristics, mechanical properties, resistivity, corrosion,
resistance, stress corrosion, tests, tables (data)
English version
Aluminium and aluminium alloys — Forgings —Part 2: Mechanical properties and additional property
requirements
Aluminium et alliages d’aluminium — Pièces forgées —
Partie 2:Caractéristiques mécaniques et autres caractéristiques exigées Aluminium und Aluminiumlegierungen —Schmiedestücke —
Teil 2: Mechanische Eigenschaften und zus?tzliche Eigenschaftsanforderungen
This European Standard was approved by CEN on 1994-06-16. 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 Central Secretariat 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 Central Secretariat has the same status as the official versions.
CEN members are the national standards bodies of Austria, Belgium,Denmark, Finland, France, Germany, Greece, Iceland, Ireland, Italy,Luxembourg, Netherlands, Norway, Portugal, Spain, Sweden, Switzerland and United Kingdom.
CEN
Central Secretariat: rue de Stassart 36, B-1050 Brussels
1994 Copyright reserved to CEN members
Ref. No. EN 586-2:1994 E
EN 586-2:1994
2
Foreword
This European Standard has been drawn up by CEN/TC 132, Aluminium and aluminium alloys, whose secretariat is held by the Association Fran?aise de Normalisation (AFNOR).Committee CEN/TC 132 entrusted
EN 586-2, Aluminium and aluminium alloys — Forgings — Part 2: Mechanical properties and additional properties.
This standard is part of a set of three standards. The other standards deal with:
EN 586-1, Aluminium and aluminium alloys — Forgings — Part 1: Technical conditions for inspection and delivery.
EN 586-3, Aluminium and aluminium alloys — Forgings — Part 3: Tolerances on dimensions and form.
This European Standard has been prepared under a mandate given to CEN by the Commission of the European Communities and the European Free Trade Association, and supports essential requirements of EC Directive(s).
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 December 1994, and conflicting national standards shall be withdrawn at the latest by December 1994.In accordance with the CEN/CENELEC Internal Regulations, the following countries are bound to implement this European Standard: Austria, Belgium, Denmark, Finland, France, Germany, Greece, Iceland, Ireland, Italy, Luxembourg, Netherlands, Norway, Portugal, Spain, Sweden, Switzerland and United Kingdom.
Contents
Page
Foreword 21Scope 32Normative references 33Definitions 34Tensile testing 35Mechanical properties 36Electrical conductivity 37Stress corrosion resistance 68Additional properties
7Annex A (normative) Rules for rounding 8Table 1 — Alloy EN AW-2014 [A1 Cu4SiMg]4Table 2 — Alloy EN AW-2024 [A1 Cu4Mg1]4
Table 3 — Alloy EN AW-5083[A1 Mg4,5Mn0,7]
4Table 4 — Alloy EN AW-5754 [A1 Mg3]5Table 5 — Alloy EN AW-6082[A1 Si1MgMn]
5Table 6 — Alloy EN AW-7075[A1 Zn5,5MgCu]
5
Table 7 — Inspection lot acceptance criteria for alloy EN AW-7075-T73 and T7352 forgings
6Table 8 — Typical electrical conductivity and hardness values
6
EN 586-2:1994
3
1 Scope
This part of EN 586 specifies the mechanical
properties and additional properties of forgings in aluminium and aluminium alloys for general
engineering applications. The chemical composition and temper designations for these alloys are specified in EN 573-3 and EN 515 respectively.
2 Normative references
This European Standard incorporates by dated or undated reference, provisions from other
publications. These normative references are cited at the appropriate places in the text and the publications are listed hereafter. For dated
references, subsequent amendments to or revisions of any of these publications apply to this European Standard only when incorporated in it by
amendment or revision. For undated references the latest edition of the publication referred to applies.EN 515, Aluminium
and aluminium alloys — Wrought products — Temper designations.
EN 573-3, Aluminium and aluminium alloys — Chemical composition and form of wrought products — Part 3: Chemical composition.
EN 586-1, Aluminium and aluminium alloys —Forgings — Part 1: Technical conditions for inspection and delivery.
EN 2004-1, Aerospace series — Test methods for aluminium and aluminium alloy, products — Part 1: Determination of electrical conductivity of wrought aluminium alloys.
EN 10002-1, Metallic materials — Tensile testing — Part 1: Method of test (at ambient temperature).ISO 6506:1981, Metallic materials — Hardness test — Brinell test.
ISO 6507-1:1982, Metallic materials — Hardness test — Vickers test — Part 1: HV 5 to HV 100.ISO 6508:1986, Metallic materials — Hardness test — Rockwell test (scales A-B-C-D-E-F-G-H-K).ISO 9591:1992, Corrosion of aluminium alloys —Determination of resistance to stress corrosion cracking.
3 Definitions
For the definition of the terms forging, inspection lot and test, see EN 586-1
For the purposes of this standard the following definitions apply.3.1
longitudinal direction
direction parallel to the primary grainflow, designated L
3.2
transverse direction (die forgings)
any direction not parallel to the primary grainflow, designated T
3.3
long transverse direction (hand forgings)direction parallel to the major sectional dimension (width), designated LT
3.4
short transverse direction (hand forgings)direction parallel to the minor sectional dimension (thickness), usually the direction of forging, designated ST 3.5
section size
diameter of the largest sphere which can be inscribed within the forging, designated t
4 Tensile testing
For the selection of specimens and orientation and preparation of test pieces, see EN 586-1. Tensile testing shall be carried out in accordance with EN 10002-1.
5 Mechanical properties
The mechanical properties of class A aluminium alloys are given in Table 1 to Table 6. Test results shall be rounded in accordance with the rules given in annex A.
6 Electrical Conductivity
The electrical conductivity of forgings produced in EN AW-7075 material in the T73 and T7352 temper conditions shall be determined in accordance with EN 2004-1 as part of the inspection lot acceptance by testing the surface of the previously selected tensile test specimens to the criteria shown in Table 7.
EN586-2:1994
4
Table 1 — Alloy EN AW-2014 [A1 Cu4SiMg]
Table 2 — Alloy EN AW-2024 [A1 Cu4Mg1] Table 3 — Alloy EN AW-5083 [A1 Mg4,5Mn0,7]
Product Temper Section size Test direction Tensile strength
Proof stress Elongation
t R m R p0,2A
mm MPa MPa%
min.min.min. All forgings T4t# 100L4202608 Product Temper Section size Test direction Tensile strength
Proof stress Elongation
t min.R m R p0,2A
mm MPa MPa%
min.min.min. All forgings H112t# 150L27012012 or T26011010
EN 586-2:1994
5
Table 4 — Alloy EN AW-5754 [A1 Mg3] Table 5 — Alloy EN AW-6082 [A1 Si1MgMn] Table 6 — Alloy EN AW-7075 [A1 Zn5,5MgCu] Product
Temper
Section size
Test direction
Tensile strength
Proof stress
Elongation
t min.R m R p0,2A mm
MPa MPa %min.
min.
min.
All forgings
H112
t # 150
L
180
80
15
Product
Temper
Section size
Test direction
Tensile strength
Proof stress
Elongation
t R m R p0,2A mm
MPa MPa %min.
min.
min.
All forgings T6t # 100
L 3102606or T 2902505
EN586-2:1994
6Table 7 — Inspection lot acceptance criteria for alloy EN AW-7075-T73 and T7352 forgings Table 8 — Typical electrical conductivity and hardness values
7 Stress corrosion resistance
Forgings produced in EN AW-7075 material in the T73 and T7352 temper conditions shall be capable of exhibiting no evidence of stress corrosion cracking when subjected to ISO 9591:1992 accelerated stress corrosion cracking test.
For the purposes of this standard, the following provisions apply:
— a minimum of three adjacent replicate test pieces shall be taken from each specimen and submitted for test;
— exposure shall be carried out by alternate immersion in a 3,5% by mass sodium chloride solution;
— test pieces shall be stressed in the short transverse direction with a stress level of 75% of the specified proof stress;— no stress corrosion related rupture shall be observed after a minimum exposure time
of20days.
The method of stressing (bending, uniaxial loading, C-ring, etc.), the shape and dimensions of the test pieces and the frequency of the test are left to the discretion of the supplier, who shall maintain records of all lots so tested and make them available for examination at the supplier’s facility for not less than five years.
Alloy designation Temper Electrical conductivity a Hardness a
H B
MS/m MS/m
EN AW-2014 [A1 Cu4SiMg]T417 – 21100
T621 – 25125
EN AW-2024 [A1 Cu4Mg1]T416 – 20120
EN AW-5083 [A1 Mg4,5Mn0,7]H11265
EN AW-5754 [A1 Mg3]H11250
EN AW-6082 [A1 Si1MgMn]T625 – 3090
EN AW-7075 [A1 Zn5,5MgCu]T617 – 21135
T73see Table 7120
T7352see Table 7120
a Due to variation in applied thermal processing and treatment of forgings, the values stated in Table 8 except for
EN AW-7075-T73 and EN AW-7075-T7352 are offered for guidance purposes only. Failure to comply with the stated values does not constitute a cause for rejection.
EN 586-2:1994
7
8 Additional properties
8.1 In addition to or in substitution for the
determination of mechanical properties, testing to establish the electrical conductivity and hardness properties of forgings shall be performed when
agreed between the purchaser and the supplier and stated on the order or drawing.
8.2 Such testing shall be carried out as a measure of batch uniformity and shall be applied to forgings on completion of all processing and prior to delivery to the purchaser.
8.3 Batch uniformity testing shall be undertaken using one of the following methods selected by the supplier:
a) each forging in the inspection lot shall be electrical conductivity tested. A forging of the lowest and highest electrical conductivity value shall be hardness tested;
b) each forging in the inspection lot shall be hardness tested. A forging of the lowest and highest hardness value shall be electrical conductivity tested.
8.4 Electrical conductivity measurement shall be in accordance with EN 2004-1. The values obtained shall not exceed the following limits of variation:a) #1,5 MS/m per forging;
b) #2,5 MS/m per inspection lot.
Actual readings obtained on electrical conductivity testing shall normally meet the values stated in Table 8. Unless otherwise indicated on the
drawing, measurements for electrical conductivity shall be carried out at a minimum of two locations selected by the supplier.
8.5 Hardness testing shall be in accordance with ISO 6506:1981 (Brinell test). Alternative methods for hardness testing e.g. Vickers hardness testing in accordance with ISO 6507-1:1982 or Rockwell
hardness testing in accordance with ISO 6508:1986 may be utilized subject to agreement between
purchaser and supplier. The values obtained shall demonstrate that forgings have been processed in a uniform manner. Actual readings obtained on Brinell hardness testing shall normally meet the values stated in Table 8. Unless otherwise indicated on the drawing the location(s) for hardness test shall be selected by the supplier.
EN 586-2:1994
8
Annex A (normative) Rules for rounding
In recording test results, the number representing the result of a test to determine a given property shall be expressed to the same number of decimal standard.
a) When the figure immediately after the last figure to be retained is less than 5, the last figure to be retained remains unchanged;
b) When the figure immediately after the last figure to be retained is greater than 5, or equal to 5 and followed by at least one figure other than zero, the last figure to be retained is increased by one;
c) When the figure immediately after the last figure to be retained is equal to 5 and followed by zeros only, the last figure to be retained remains unchanged if even and is increased by one if odd.。