SIST EN 3335:2005

Aerospace series - Aluminium alloy AL-P7475-O2 - Sheet for superplastic forming (SPF) - 0,8 mm <a <6 mm

This standard specifies the requirements relating to:
Aluminium alloy AL-P7475-
O2
Sheet for superplastic forming (SPF)
0,8 mm < or = a < or = 6 mm
for aerospace application.

Luft- und Raumfahrt - Aluminiumlegierung AL-P7475-O2 - Bleche für superplastische Formgebung (SPF) - 0,8 mm <a <6 mm

Série aérospatiale - Alliage d'aluminium AL-P7475-O2 - Tôles pour formage superplastique (FSP) - 0,8 mm <a <6 mm

Aerospace series - Aluminium alloy AL-P7475-O2 - Sheet for superplastic forming (SPF) - 0,8 mm <a <6 mm

General Information

• Status: Published
• Publication Date: 31-Oct-2005
• ICS: 49.025.20 - Aluminium
• Technical Committee: SS SPL - Technical Board for the general field
• Current Stage: 6060 - National Implementation/Publication (Adopted Project)
• Start Date: 01-Nov-2005
• Due Date: 01-Nov-2005
• Completion Date: 01-Nov-2005
• Ref Project: EN 3335:2005 - Aerospace series - Aluminium alloy AL-P7475-O2 - Sheet for superplastic forming (SPF) - 0,8 mm <a <6 mm

Overview

EN 3335:2005 defines the material and testing requirements for aluminium alloy AL-P7475-O2 supplied as sheet for superplastic forming (SPF) in aerospace applications. The standard applies to sheet thicknesses 0.8 mm to 6 mm and is part of the EN aerospace metallic materials series. It is intended to ensure consistent material composition, delivery condition, heat treatment and demonstrable SPF capability for reliable manufacture of formed aerospace components.

Key attributes covered:

• Alloy designation: AL-P7475-O2
• Form: sheet, rolled and thermomechanically processed to enhance SPF capability
• Thickness range: 0.8 mm ≤ a ≤ 6 mm
• Delivery condition: O2 (thermomechanically processed)

Key Topics

• Chemical composition and limits: The standard lists the permissible element ranges for Si, Fe, Cu, Mn, Mg, Cr, Zn, Ti and Al to meet AL-P7475 requirements.
• Heat treatment and temper: Reference heat treatment and tempering cycles are specified (including solution and ageing steps; for example a solution step followed by staged ageing). The standard references the code T762 for release testing.
• Mechanical property minima: Release testing minima are specified, including proof stress and tensile strength requirements and a minimum elongation in the delivery condition. Typical values given for release testing include proof stress R_p0.2 ≥ 410 MPa, tensile strength R_m ≥ 490 MPa and elongation A ≥ 9% (50 mm gauge), noting these are manufacturer release test levels and may differ in formed parts.
• Superplastic forming capability: SPF capability is verified by elevated-temperature tensile testing. The standard calls out testing at around 510–520 °C, soaking times and strain-rate conditions and requires very high elongation (for example a reported requirement of elongation ≥ 300% under SPF test conditions).
• Inspection and acceptance: Requirements cover sampling, microstructure, grain size, electrical conductivity limits and external defect inspection. Some acceptance criteria may be agreed between manufacturer and purchaser.

Applications

• Production of complex, thin-walled aerospace structural parts by superplastic forming
• High-performance formed components where high strength-to-weight and tight process control are required

EN 3335:2005 supports procurement, qualification and process control for manufacturers and purchasers of SPF sheet for aircraft and aerospace applications.

Related Standards

• EN 4400-2 (Aluminium and aluminium alloy wrought products - Technical specification - Part 2: Sheet and strip)
• EN 4258 (General organisation of aerospace metallic material standardization)
• EN 4500-2 (Rules for drafting and presentation of material standards for aluminium alloys)

For procurement or specification, reference EN 3335:2005 together with the referenced EN documents and agree any capability or acceptance clauses between manufacturer and purchaser.

Standards Content (Sample)

SLOVENSKI STANDARD
01-november-2005
Aerospace series - Aluminium alloy AL-P7475-O2 - Sheet for superplastic forming
(SPF) - 0,8 mm Aerospace series - Aluminium alloy AL-P7475-O2 - Sheet for superplastic forming (SPF)
- 0,8 mm Luft- und Raumfahrt - Aluminiumlegierung AL-P7475-O2 - Bleche für superplastische
Formgebung (SPF) - 0,8 mm Série aérospatiale - Alliage d'aluminium AL-P7475-O2 - Tôles pour formage
superplastique (FSP) - 0,8 mm Ta slovenski standard je istoveten z: EN 3335:2005
ICS:
49.025.20 Aluminij Aluminium
2003-01.Slovenski inštitut za standardizacijo. Razmnoževanje celote ali delov tega standarda ni dovoljeno.

EUROPEAN STANDARD EN 3335
NORME EUROPÉENNE
EUROPÄISCHE NORM
June 2005
ICS 49.025.20
English version
Aerospace series - Aluminium alloy AL-P7475-O2 - Sheet for
superplastic forming (SPF) - 0,8 mm ≤a ≤6 mm
Série aérospatiale - Alliage d'aluminium AL-P7475-O2 - Luft- und Raumfahrt - Aluminiumlegierung AL-P7475-O2 -
Tôles pour formage superplastique (FSP) - 0,8 mm ≤a ≤6 Bleche für superplastische Formgebung (SPF) - 0,8 mm ≤a
mm ≤6 mm
This European Standard was approved by CEN on 22 April 2005.

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, Cyprus, Czech Republic, Denmark, Estonia, Finland, France,
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© 2005 CEN All rights of exploitation in any form and by any means reserved Ref. No. EN 3335:2005: E
worldwide for CEN national Members.

Foreword
This document (EN 3335:2005) has been prepared by the European Association of Aerospace
Manufacturers - Standardization (AECMA-STAN).
After enquiries and votes carried out in accordance with the rules of this Association, this Standard has
received the approval of the National Associations and the Official Services of the member countries of
AECMA, prior to its presentation to CEN.
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 2005, and conflicting national standards shall be withdrawn
at the latest by December 2005.
Attention is drawn to the possibility that some of the elements of this document may be the subject of patent
rights. CEN [and/or CENELEC] shall not be held responsible for identifying any or all such patent rights.
According to the CEN/CENELEC Internal Regulations, the national standards organizations of the following
countries are bound to implement this European Standard: Austria, Belgium, Cyprus, Czech Republic,
Denmark, Estonia, Finland, France, Germany, Greece, Hungary, Iceland, Ireland, Italy, Latvia, Lithuania,
Luxembourg, Malta, Netherlands, Norway, Poland, Portugal, Slovakia, Slovenia, Spain, Sweden, Switzerland
and the United Kingdom.
Introduction
This standard is part of the series of EN metallic material standards for aerospace applications. The general
organization of this series is described in EN 4258.
This standard has been prepared in accordance with EN 4500-2.
1 Scope
This standard specifies the requirements relating to:
Aluminium alloy AL-P7475-
O2
Sheet for superplastic forming (SPF)
0,8 mm ≤ a ≤ 6 mm
for aerospace application.
2 Normative references
The following referenced documents are indispensable for
...