Bsi bs en 00570 1995 (1999)

00506181 PDF BRITISH STANDARD BS EN 570 1995 Aluminium and aluminium alloys — Impact extrusion slugs obtained from wrought products — Specifications The European Standard EN 570 1994 has the status of[.]

BRITISH STANDARD BS EN

570:1995

Aluminium and

aluminium alloys —

Impact extrusion slugs

obtained from wrought

products —

Specifications

The European Standard EN 570:1994 has the status of a

British Standard

UDC 669.71-412:669.715.018.26-412:621.777.4:620.1

This British Standard, having

been prepared under the

direction of the Engineering

Sector Board, was published

under the authority of the

Standards Board and comes into

effect on

15 April 1995

© BSI 08-1999

The following BSI references

relate to the work on this

standard:

Committee reference NFE/35

Draft for comment 91/47490 DC

ISBN 0 580 23697 8

Committees responsible for this British Standard

The preparation of this British Standard was entrusted by the Engineering Sector Board to Technical Committee NFE/35, Light metals and their alloys, upon which the following bodies were represented:

Aluminium Federation Aluminium Stockholders’ Association London Metal Exchange

Magnesium Industry Council The following bodies were also represented in the drafting of the standard, through subcommittees and panels:

Association of British Welded Aluminium Tube Makers Association of Light Alloy Refiners Limited

Institution of Structural Engineers Metal Packaging Manufacturers’ Association

Amendments issued since publication

Amd No Date Comments

BS EN 570:1995

Contents

Page

ii © BSI 08-1999

National foreword

This British Standard has been prepared by Technical Committee NFM/35 and is

the English language version of EN 570:1994 Aluminium and aluminium

alloys — Impact extrusion slugs obtained from wrought products — Specifications, published by the European Committee for Standardization (CEN).

A British Standard does not purport to include all the necessary provisions of a contract Users of British Standards are responsible for their correct application

Compliance with a British Standard does not of itself confer immunity from legal obligations.

Publication referred to Corresponding British Standard

EN 573-3:1994 BS EN 573 Aluminium and aluminium alloys —

Chemical composition and form of wrought products

Part 3:1995 Chemical composition

EN 754-5:1994 BS EN 754 Aluminium and aluminium alloys — Cold

drawn rod/bar and tube

Part 5:1994 Drawn rectangular bars, tolerances on

dimensions and forma

EN 755-5:1994 BS EN 755 Aluminium and aluminium alloys —

Extruded rod/bar, tube and profile

Part 5:1994 Extruded rectangular bars, tolerances on

dimensions and forma

EN 10204:1991 BS EN 10204:1991 Metallic products — Types of

inspection documents

a In preparation

Summary of pages

This document comprises a front cover, an inside front cover, pages i and ii, the EN title page, pages 2 to 8, an inside back cover and a back cover

This standard has been updated (see copyright date) and may have had amendments incorporated This will be indicated in the amendment table on the inside front cover

EUROPEAN STANDARD

NORME EUROPÉENNE

EUROPÄISCHE NORM

EN 570

August 1994

UDC 669.71-412:669.715.018.26-412:621.777.4:620.1

Descriptors: Wrought product, aluminium, aluminium alloy, slug, designation, dimension, dimensional tolerance, form tolerance,

chemical composition, mechanical property, surface condition, quality

English version

Aluminium and aluminium alloys — Impact extrusion slugs obtained from wrought products — Specifications

Aluminium et alliages d’aluminium — Pions

de filage par choc obtenusà partir de produits

corroyés — Spécifications

Aluminium und Aluminiumlegierungen — Butzen zum Fließpressen aus Halbzeug hergestellt — Spezifikationen

This European Standard was approved by CEN on 1994-08-18 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

European Committee for Standardization Comité Européen de Normalisation Europäisches Komitee für Normung

Central Secretariat: rue de Stassart 36, B-1050 Brussels

© 1994 Copyright reserved to CEN members

Ref No EN 570:1994 E

© BSI 08-1999 2

Foreword

This European Standard has been drawn up by

CEN/TC 132, Aluminium and aluminium alloys,

whose Secretariat is held by the Association

Française de Normalisation (AFNOR)

Within its programme of work, Technical

Committee CEN/TC 132 entrusted

CEN/TC 132/WG 11, Slugs for impact extrusion, to

prepare the following standard:

EN 570, Aluminium and aluminium alloys —

Impact extrusion slugs obtained from wrought

products — Specifications.

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

February 1995, and conflicting national standards

shall be withdrawn at the latest by February 1995

According to 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, United Kingdom

Contents

Page

5.1 Tolerances on dimensions and form 4

7 Sampling rate and test certificates 8

Table 1 — Tolerances on diameter of

Table 2 — Tolerances on diameter of

Table 3 — Tolerances on hole diameter

Table 4 — Tolerances on outside or inside diameter and wall thickness for sawn slugs 6 Table 5 — Tolerances on length and

width of punched rectangular slugs 6 Table 6 — Tolerances on thickness of

Table 7 — Tolerances on thickness of

Table 8 — Material designation and

EN 570:1994

1 Scope

This European Standard specifies the technical

conditions for inspection and delivery, tolerances on

dimensions and form and other requirements for

flat or preformed aluminium and aluminium alloy

slugs for impact extrusion

It applies to slugs produced either by punching of

rolled products or by cutting of extruded products

This standard does not apply to slugs produced from

unwrought cast ingots

Slugs covered in this standard are suitable for the

manufacture of impact extruded parts for packaging

and industrial applications

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 573-3, Aluminium and aluminium alloys —

Chemical composition and form of wrought

products — Part 3: Chemical composition

EN 754-5, Aluminium and aluminium alloys —

Cold drawn rod/bar and tube — Part 5: Rectangular

bars, tolerances on dimensions and form1)

EN 755-5, Aluminium and aluminium alloys —

Extruded rod/bar, tube and profile —

Part 5: Rectangular bars, tolerances on dimensions

and form1)

EN 10204, Metallic products — Types of inspection

documents

ISO 6506, Metallic materials — Hardness test —

Brinell test

3 Definitions

For the purposes of this standard the following

definitions apply:

3.1

slug

a piece of metal of uniform thickness of regular or

irregular shape taken from a wrought product,

usually for impact extrusion Slugs are supplied

with or without a centre hole

3.2 thickness

in slugs punched from rolled products, the thickness

is measured perpendicular to the rolling plane, whilst in slugs cut from extruded products thickness

is measured in the extrusion direction

4 Orders or tenders

4.1 General

The selection of material and of the condition of supply is at the customer’s discretion It is recommended that, when ordering, the intended use and any further processing envisaged be stated

If preformed slugs are required, the type of preforming shall be given when ordering, together with a drawing specifying the details In addition, details on shape and size shall be given in the

designation (see 4.2).

4.2 Designation 4.2.1 Standard designation

The standard designation shall be given in the following order:

— the description of product (slug);

— the number of this European Standard;

— the slug shape, e.g flat, round with or without hole, rectangular, preformed;

— dimensions in millimetres;

— the designation of the aluminium or

aluminium alloy, see 5.2;

— the surface finish, see 5.4.1.

4.2.2 Examples of standard designation 4.2.2.1 Round slug without a centre hole

(see Figure 1)

Description of product, EN number, slug shape: round (rd), diameter × thickness, material designation, e.g

Slug EN 570 – rd 24,8 × 4,2 – EN AW-1050A or Slug

EN 570 – rd 24,8 × 4,2 – EN AW-A1 99,5

1) Under preparation

4 © BSI 08-1999

4.2.2.2 Round slug with a centre hole (see Figure 2)

Description of product, EN number, slug shape:

round (rd), diameter × thickness × hole diameter

(ch), material designation, e.g

Slug EN 570 – rd 24,8 × 4,2 × 8ch – EN AW-1050A

or Slug EN 570 – rd 24,8 × 4,2 × 8ch –

EN AW-A1 99,5

4.2.2.3 Rectangular slug (see Figure 3)

Description of product, EN number, slug shape:

rectangular (rect), length × width × thickness,

corner radius (R), e.g R1 if 1 mm, material

designation, e.g

Slug EN 570 – rect 51 × 26,5 × 6,1 × R1 –

EN AW – 1050A

or Slug EN 570 – rect 51 × 26,5 × 6,1 × R1 – EN

AW-A1 99,5

4.2.3 Designation in order

When ordering, the standard designation shall be supplemented by stating as applicable, the mass (preceding the standard designation), the slug shape (flat or preformed), and the surface finish (as

specified in 5.4.1), e.g.

Example: 4 t of round flat slugs without a centre

hole with bright surface finish:

4 t Slug EN 570 – flat, bright, rd 29,8 × 4 –

EN AW – 1050A

or 4 t Slug EN 570 – flat, bright, rd 29,8 × 4 –

EN AW-A1 99,5

5 Requirements

5.1 Tolerances on dimensions and form 5.1.1 General

The requirements for tolerances on dimensions and form for slugs manufactured in a flat or preformed

shape are specified in 5.1.2 to 5.1.6.

The tolerances specified in Table 1 to Table 7 shall apply for slugs after punching or cutting in the bright condition

Slugs with a roughened surface shall be assumed to have an average increase in dimensions of 0,05 mm The increase in dimensions depends on the material used and the mass of the slug Particular tolerances for slugs with a roughened surface shall be agreed between supplier and customer

The limits of size in the manufacture of punched slugs shall be as follows

a) In the case of round slugs, the thickness shall not exceed the diameter

b) In the case of rectangular slugs, the thickness shall not exceed the width

c) In the case of slugs with a centre hole, the slug thickness shall not exceed the hole diameter

If these limits are exceeded, slugs shall be manufactured by cutting

5.1.2 Slug diameter

The tolerances specified in Table 1 for punched round slugs and Table 2 for sawn slugs shall apply

Figure 1

Figure 2

Figure 3

EN 570:1994

Table 1 — Tolerances on diameter of punched

slugs

Table 2 — Tolerances on diameter of sawn

slugs

5.1.3 Hole diameter of punched slugs

The tolerances specified in Table 3 shall apply only

for flat slugs with a hole, with the hole diameter not

exceeding 40 % of the slug diameter and the slug

thickness not exceeding two thirds of the hole

diameter

In all other cases, the tolerances of the hole

diameter shall be agreed between supplier and

customer

Table 3 — Tolerances on hole diameter of

punched slugs

The hole eccentricity e shall be determined

according to Figure 4 and shall not exceed 0,15 mm

The tolerances for the hole diameter include the circularity tolerance

5.1.4 Diameters and wall thickness of sawn slugs with a hole

The tolerances specified in Table 4 shall apply to sawn slugs with a hole, produced from round tubes with or without extrusion seams

5.1.5 Length and width of rectangular slugs

The tolerances specified in Table 5 shall apply to punched rectangular slugs For sawn rectangular slugs up to 200 mm the tolerances for the

cross-section of the bar as specified in EN 755-5 shall apply If tighter tolerances are needed this shall be specified in the order In this case tolerances as specified in EN 754-5 shall apply

Dimensions in millimetres

Slug diameter Tolerancesa

over up to

a The tolerances include the circularity tolerance.

Dimensions in millimetres

Slug diameter Tolerancesa

over up to

a The tolerances include the circularity tolerance.

0 0,07 – 0 0,09 – 0 0,11 – 0 0,13 – 0 0,16 – 0 0,5 – 0 0,6 – 0 0,9 –

Dimensions in millimetres

Hole diameter Tolerances over up to

Figure 4

6 © BSI 08-1999

Table 4 — Tolerances on outside or inside diameter and wall thickness for sawn slugs

Table 5 — Tolerances on length and width of

punched rectangular slugs

5.1.6 Thickness

The tolerances specified given in Table 6 and

Table 7 shall apply to the slug thickness

Table 6 — Tolerances on thickness of punched

slugs

When measuring the thickness, the burr arising from punching or the edge radii shall be

disregarded When measuring the thickness, the burr arising from cutting or the edge radii shall be disregarded

5.1.7 Flatness

Tolerances and measuring methods for particular requirements with regard to flatness shall be agreed between supplier and customer

5.2 Chemical composition

Slugs complying with this standard shall be made from the materials listed in Table 8

The chemical composition of these materials shall conform to EN 573-3

5.3 Mechanical properties

Slugs complying with this standard shall be made in

“O” (annealed) temper

In the case of slugs with roughened surface, the approximate values of Brinell hardness given

in Table 8 are for guidance only

If the customer requires specific values these shall

be agreed between customer and supplier at the time of ordering

5.4 Other requirements 5.4.1 General

Apart from the chemical composition and hardness (see Table 8), the type of surface treatment is a major factor in the workability of slugs and their suitability for impact extrusion

5.4.2 Surface finish

Slugs may be supplied with one of the following surface finishes:

a) bright;

b) roughened: scoured or blasted or tumbled The required surface finish shall be stated at the time of ordering

Dimensions in millimetres

Outside diameter or inside

diameter Tolerances on wall thicknessSafor wall thicknesses

over up to Tolerancesb from 2,5 up to 3 over 3 up to 5 over 5 up to 8 over 8 up to 10 over 10 up to 15 over 15 up to 20 over 20 up to 25

a Including concentricity

b Including ovality

Dimensions in millimetres

Length and width Tolerancesa

over up to

a The corner radius shall not be less than 1 mm and shall be

specified in the order.

Dimensions in millimetres

Slug thickness Tolerancesa

over up to

a The tolerances apply only to slugs with a maximum thickness

not exceeding half the diameter (in the case of round slugs) or

not exceeding half the width (in the case of rectangular slugs)

In all other cases, the tolerances shall be agreed at the time of

ordering.