Steel sheet, aluminium-silicon alloy-coated by the continuous hot-dip process, of commercial and drawing qualities

This document is applicable to the minimum requirements for steel sheet, in coils and cut lengths, metallic-coated by the continuous hot-dip process, with aluminium-silicon alloy coating. The product is intended for heat-resisting applications and also where both corrosion and heat resistance are required. The steel sheet is produced in a number of quality designations and grades, coating mass, surface treatments and coating finish conditions to be compatible with differing application requirements.

Tôles en acier au carbone laminées à froid, revêtues par immersion à chaud en continu d'une couche d'aluminium-silicium, de qualité commerciale et pour emboutissage

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Status
Published
Publication Date
20-May-2019
Current Stage
6060 - International Standard published
Start Date
18-Apr-2019
Completion Date
21-May-2019
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INTERNATIONAL ISO
STANDARD 5000
Fifth edition
2019-05
Steel sheet, aluminium-silicon alloy-
coated by the continuous hot-dip
process, of commercial and drawing
qualities
Tôles en acier au carbone laminées à froid, revêtues par immersion
à chaud en continu d'une couche d'aluminium-silicium, de qualité
commerciale et pour emboutissage
Reference number
ISO 5000:2019(E)
ISO 2019
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ISO 5000:2019(E)
COPYRIGHT PROTECTED DOCUMENT
© ISO 2019

All rights reserved. Unless otherwise specified, or required in the context of its implementation, no part of this publication may

be reproduced or utilized otherwise in any form or by any means, electronic or mechanical, including photocopying, or posting

on the internet or an intranet, without prior written permission. Permission can be requested from either ISO at the address

below or ISO’s member body in the country of the requester.
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Published in Switzerland
ii © ISO 2019 – All rights reserved
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ISO 5000:2019(E)
Contents Page

Foreword ..........................................................................................................................................................................................................................................v

1 Scope ................................................................................................................................................................................................................................. 1

2 Normative references ...................................................................................................................................................................................... 1

3 Terms and definitions ..................................................................................................................................................................................... 1

4 Dimensions ................................................................................................................................................................................................................. 2

5 Conditions of manufacture ........................................................................................................................................................................ 3

5.1 Steelmaking ............................................................................................................................................................................................... 3

5.2 Chemical composition ...................................................................................................................................................................... 3

5.3 Chemical analysis .................................................................................................................................................................................. 3

5.3.1 Heat analysis ...................................................................... .................................................................................................. 3

5.3.2 Product analysis ............................................................................................................................................................... 3

5.4 Mechanical properties ...................................................................................................................................................................... 4

5.4.1 Ordering conditions ...................................................................................................................................................... 4

5.4.2 Fabrication qualities ..................................................................................................................................................... 4

5.4.3 Interstitial free steel ........................................................................................................................................... ........... 5

5.5 Coating ........................................................................................................................................................................................................... 6

5.5.1 Silicon content.................................................................................................................................................................... 6

5.5.2 Coating mass........................................................................................................................................................................ 6

5.5.3 Coating adherence .......................................................................................................................................................... 6

5.6 Weldability .................................................................................................................................................................................................. 7

5.7 Coating finish condition .................................................................................................................................................................. 7

5.8 Surface treatment ................................................................................................................................................................................. 7

5.8.1 Mill passivation ................................................................................................................................................................. 7

5.8.2 Oiling .......................................................................................................................................................................................... 7

5.9 Coated coil joining ................................................................................................................................................................................ 7

5.10 Dimensional and shape tolerances ........................................................................................................................................ 7

6 Sampling ........................................................................................................................................................................................................................ 8

6.1 Tensile test .................................................................................................................................................................................................. 8

6.2 Coating tests .............................................................................................................................................................................................. 8

6.2.1 Coating mass........................................................................................................................................................................ 8

6.2.2 Triple-spot test .................................................................................................................................................................. 8

6.2.3 Single-spot test .................................................................................................................................................................. 8

6.2.4 Coating adherence .......................................................................................................................................................... 8

7 Test methods ............................................................................................................................................................................................................. 8

7.1 Tensile test .................................................................................................................................................................................................. 8

7.2 Coating properties ............................................................................................................................................................................... 9

7.2.1 Coating mass........................................................................................................................................................................ 9

7.2.2 Coating adherence .......................................................................................................................................................... 9

8 Designation system ............................................................................................................................................................................................ 9

8.1 General ........................................................................................................................................................................................................... 9

8.2 Coating designation ............................................................................................................................................................................ 9

8.3 Coating mass ............................................................................................................................................................................................. 9

8.4 Coating finish condition .................................................................................................................................................................. 9

8.5 Surface treatment ................................................................................................................................................................................. 9

8.6 Base-metal quality ............................................................................................................................................................................10

8.7 Examples ...................................................................................................................................................................................................10

9 Retests ..........................................................................................................................................................................................................................10

9.1 Machining and flaws........................................................................................................................................................................10

9.2 Elongation ................................................................................................................................................................................................10

9.3 Additional tests ....................................................................................................................................................................................11

10 Resubmission ........................................................................................................................................................................................................11

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ISO 5000:2019(E)

11 Workmanship .......................................................................................................................................................................................................11

12 Inspection and acceptance ......................................................................................................................................................................11

13 Coil size ........................................................................................................................................................................................................................11

14 Marking .......................................................................................................................................................................................................................11

15 Information to be supplied by the purchaser......................................................................................................................12

Annex A (normative) Orders requiring base-metal thickness ...............................................................................................13

Annex B (normative) Determination of mass of coating on aluminium-silicon alloy-coated

steel sheet .................................................................................................................................................................................................................14

iv © ISO 2019 – All rights reserved
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ISO 5000:2019(E)
Foreword

ISO (the International Organization for Standardization) is a worldwide federation of national standards

bodies (ISO member bodies). The work of preparing International Standards is normally carried out

through ISO technical committees. Each member body interested in a subject for which a technical

committee has been established has the right to be represented on that committee. International

organizations, governmental and non-governmental, in liaison with ISO, also take part in the work.

ISO collaborates closely with the International Electrotechnical Commission (IEC) on all matters of

electrotechnical standardization.

The procedures used to develop this document and those intended for its further maintenance are

described in the ISO/IEC Directives, Part 1. In particular, the different approval criteria needed for the

different types of ISO documents should be noted. This document was drafted in accordance with the

editorial rules of the ISO/IEC Directives, Part 2 (see www .iso .org/directives).

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

patent rights. ISO shall not be held responsible for identifying any or all such patent rights. Details of

any patent rights identified during the development of the document will be in the Introduction and/or

on the ISO list of patent declarations received (see www .iso .org/patents).

Any trade name used in this document is information given for the convenience of users and does not

constitute an endorsement.

For an explanation of the voluntary nature of standards, the meaning of ISO specific terms and

expressions related to conformity assessment, as well as information about ISO's adherence to the

World Trade Organization (WTO) principles in the Technical Barriers to Trade (TBT) see www .iso

.org/iso/foreword .html.

This document was prepared by Technical Committee ISO/TC 17, Steel, Subcommittee SC 12, Continuous

mill flat rolled products.

This fifth edition cancels and replaces the fourth edition (ISO 5000:2011), which has been technically

revised. The main changes compared to the previous edition are as follows:
— editorial updates throughout for clarity.

Any feedback or questions on this document should be directed to the user’s national standards body. A

complete listing of these bodies can be found at www .iso .org/members .html.
© ISO 2019 – All rights reserved v
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INTERNATIONAL STANDARD ISO 5000:2019(E)
Steel sheet, aluminium-silicon alloy-coated by the
continuous hot-dip process, of commercial and drawing
qualities
1 Scope

This document is applicable to the minimum requirements for steel sheet, in coils and cut lengths,

metallic-coated by the continuous hot-dip process, with aluminium-silicon alloy coating.

The product is intended for heat-resisting applications and also where both corrosion and heat

resistance are required.

The steel sheet is produced in a number of quality designations and grades, coating mass, surface

treatments and coating finish conditions to be compatible with differing application requirements.

2 Normative references

The following documents are referred to in the text in such a way that some or all of their content

constitutes requirements of this document. For dated references, only the edition cited applies. For

undated references, the latest edition of the referenced document (including any amendments) applies.

ISO 6353 (all parts), Reagents for chemical analysis

ISO 6892-1, Metallic materials — Tensile testing — Part 1: Method of test at room temperature

ISO 7438, Metallic materials — Bend test

ISO 16163, Continuously hot-dipped coated steel sheet products — Dimensional and shape tolerances

3 Terms and definitions
For the purposes of this document, the following terms and definitions apply.

ISO and IEC maintain terminological databases for use in standardization at the following addresses:

— ISO Online browsing platform: available at https: //www .iso .org/obp
— IEC Electropedia: available at http: //www .electropedia .org/
3.1
commercial

base-metal quality intended for general fabricating purposes where sheet is used in the flat condition,

or for bending or moderate forming
3.2
drawing

base-metal quality intended for parts where drawing or severe forming may be involved

3.3
deep drawing

base-metal quality intended for parts where severe forming or severe drawing may be involved

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ISO 5000:2019(E)
3.4
deep drawing aluminium killed

base-metal quality intended for fabricating parts where particularly severe drawing or forming may be

involved
3.5
extra-deep drawing stabilized

base-metal quality intended for applications where maximum formability is required by applying

interstitial free steel
3.6
interstitial free steel
IF steel

extra-low-carbon steel in which all interstitial elements are combined with titanium and/or equivalent

elements

Note 1 to entry: Interstitial free steel is sometimes referred to as stabilized steel.

3.7
differential coating

coating deliberately produced to have a different coating mass (3.9) on each surface

3.8
breakage allowance
agreed upon level of acceptable die breakage not subject to claim
3.9
coating mass

total amount of coating on both sides of the sheet, expressed in grams per square metre

3.10
normal spangle

coating formed as a result of the unrestricted growth of aluminium-silicon alloy crystals during normal

solidification
3.11
skin pass
light cold rolling of the product

Note 1 to entry: The purpose of the skin passing is one or more of the following: to minimize the appearance of

coil breaks, stretcher strains and fluting; to control the shape; and to obtain the required surface finish.

Note 2 to entry: Some increase in hardness and some loss in ductility will result from skin passing.

3.12
lot

up to a specified quantity of steel sheet of the same designation rolled to the same thickness and coating

condition
3.13
smooth finish

smoothness produced by skin-passing the coated material in order to achieve an improved surface

condition as compared with the normal as-coated product
4 Dimensions

4.1 Aluminium-silicon alloy-coated steel sheet is produced in thicknesses from 0,40 mm to 3,0 mm

inclusive and in widths of 600 mm to 1 500 mm in coils and cut lengths. Aluminium-silicon alloy-coated

sheet less than 600 mm wide, slit from wide sheet, is considered as sheet.
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ISO 5000:2019(E)

4.2 The thickness of aluminium-silicon alloy-coated steel sheets may be specified as a combination

of the base metal and metallic coating, or as base metal alone. The purchaser shall indicate on the order

which method of specifying thickness is required. In the event that the purchaser does not indicate any

preference, the thickness as a combination of the base metal and coating will be provided. Annex A

describes the requirements for specifying the thickness as base metal alone.
5 Conditions of manufacture
5.1 Steelmaking

Unless otherwise agreed by the interested parties, the processes used in making the steel and in

manufacturing aluminium-silicon alloy-coated sheet are left to the discretion of the manufacturer. On

request, the purchaser shall be informed of the steelmaking process being used.
5.2 Chemical composition

The chemical composition (heat analysis) shall conform to the requirements given in Tables 1 and 2.

5.3 Chemical analysis
5.3.1 Heat analysis

An analysis of each heat shall be made by the manufacturer in order to determine conformity with

the requirements given in Tables 1 and 2. On request, a report of the heat analysis shall be made

available to the purchaser or the purchaser’s representative. Each of the elements listed in Tables 1 and

2 shall be included in the report of the heat analysis. When the amount of copper, nickel, chromium or

molybdenum present is less than 0,02 %, the analysis may be reported as “<0,02%”.

5.3.2 Product analysis

A product analysis may be made by the purchaser in order to verify the specified analysis of the product

and shall take into consideration any normal heterogeneity. The product analysis shall be in accordance

with Tables 2 and 3.
Table 1 — Chemical composition (heat analysis)
Mass fractions in percent
Base-metal quality C Mn P S Ti
Designation Name max. max. max. max. max.
01 Commercial 0,15 0,60 0,05 0,035 —
02 Drawing 0,10 0,50 0,04 0,035 —
03 Deep drawing 0,08 0,45 0,03 0,03 —
04 Deep drawing aluminium killed 0,06 0,45 0,03 0,03 —
05 Extra-deep drawing stabilized 0,02 0,25 0,02 0,02 0,15
Interstitial free steel may be applied (see 5.4.3).
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ISO 5000:2019(E)
Table 2 — Limits on additional chemical elements
Mass fractions in percent
a a ab ab c c,d c
Cu Ni Cr Mo Nb V Ti
Element
max. max. max. max. max. max. max.
Heat analysis 0,20 0,20 0,15 0,06 0,008 0,008 0,008
Product analysis 0,23 0,23 0,19 0,07 0,018 0,018 0,018

The sum of copper, nickel, chromium and molybdenum shall not exceed 0,50 % on heat analysis. When one or more of

these elements are specified, the sum does not apply, in which case only the individual limits on the remaining elements apply.

The sum of chromium and molybdenum shall not exceed 0,16 % on heat analysis. When one or more of these elements

are specified, the sum does not apply, in which case, only the individual limits on the remaining elements apply.

For interstitial free steels only, the value of 0,15 % titanium, and 0,10 % maximum for niobium and vanadium are

acceptable to ensure that the carbon and nitrogen are fully stabilized.

Heat analysis greater than 0,008 % may be supplied after agreement between producer and purchaser.

Table 3 — Product analysis tolerances for Table 1
Mass fractions in percent
Element Maximum of specified element Tolerance over maximum specified
C 0,02 0,01
0,15 0,03
Mn 0,60 0,03
P 0,05 0,01
S 0,035 0,01

NOTE The above maximum tolerance is the allowable excess over the requirement of heat analysis shown in Table 1.

5.4 Mechanical properties
5.4.1 Ordering conditions

Aluminium-silicon alloy-coated steel sheet of designations 02 and 03 are supplied under either of the

following two ordering conditions.

a) Ordering condition A: steel sheet mechanical properties shall, at the time the steel is made available

for shipment, satisfy the applicable requirements of Table 4, when they are determined on test

pieces obtained in accordance with the requirements in Clause 7. The values specified in Table 4 are

applicable for the periods indicated in Table 5 from the time that the steel is available for shipment.

b) Ordering condition B: steel sheet, ordered to make an identified part, shall be supplied with

a commitment for satisfactory manufacturing performance within an established breakage

allowance, which shall be previously agreed upon by the interested parties. In the agreement, the

part name, the details of fabrication, and special requirements (such as freedom from stretcher

strain or fluting) shall be specified.

In the case of ordering condition B, mechanical properties of the steel sheet may also be agreed upon

by the interested parties and such properties may not necessarily satisfy the requirements of Table 4.

5.4.2 Fabrication qualities

Aluminium-silicon alloy-coated steel sheets are available in several fabrication qualities: commercial,

drawing, deep drawing, deep drawing aluminium killed and extra-deep drawing stabilized.

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ISO 5000:2019(E)
5.4.3 Interstitial free steel

Stabilized interstitial free (IF) steel is applicable to orders for designations 03, 04 and 05; provided that

the purchaser is informed of the substitution and that related shipping documents reflect the actual

material shipped.
Table 4 — Mechanical properties
r n
R R
eL m
Base-metal quality min.
a b
max. max.
def def
min. min.
Designation Name MPa MPa L = 80 mm L = 50 mm
0 0
01 Commercial — — — — — —
02 Drawing 340 430 30 31 — —
03 Deep drawing 300 410 34 35 — —
Deep drawing aluminium
04 270 410 36 37 — —
killed
Extra-deep drawing stabi-
05 250 380 38 38 1,4 0,17
lized
R = lower yield strength
R = tensile strength
A = percentage elongation after fracture
L = gauge length of original test piece
r = index of drawability of the product
n = index of stretchability of the product
1 MPa = 1 N/mm

NOTE 1 For products produced according to performance criteria (ordering condition B), the typical mechan-

ical properties presented here are non-mandatory. For products specified according to mechanical proper-

ties (ordering condition A), the purchaser may negotiate with the manufacturer if a specific range, or a more

restrictive range, is required for the application. When agreed to, such values may be specified.

NOTE 2 With the exception of footnote c and d; these typical mechanical properties apply to the full range of

steel sheet thicknesses. The yield strength tends to increase and some of the formability tends to decrease as

the sheet thickness decreases.

The values apply to 0,2 % proof strength when a definite yield phenomenon is not present, otherwise to the

lower yield strength (R ).

The minimum tensile strength for qualities 02, 03 and 04 would normally be expected to be 270 MPa. For

design purposes, the lower limit for R may be assumed to be 140 MPa for grades 01, 02, 03, 04, and 120 MPa

for grade 05. All tensile strength values are determined to the nearest 10 MPa.

For materials of thickness up to and including 0,6 mm, the elongation percentages in this table shall be re-

duced by 2.

r and n values are only applicable to thickness ≥0,5 mm. For thickness >2,0 mm, the r value is reduced by 0,2.

r can also be written as r-bar and n can also be written as n-bar.
f r

and n values may be modified or excluded from this specification, by agreement between the producer

and the purchaser.
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ISO 5000:2019(E)
Table 5 — Applicable period for values specified in Table 4
Designation Period
01 Not applicable
02 8 days
03 30 days
04 6 months
05 6 months
5.5 Coating
5.5.1 Silicon content

The aluminium-silicon alloy used for coating normally has between 5 % and 11 % silicon added to

promote better adherence and heat resistance.
5.5.2 Coating mass

The coating mass limits shall conform to the limits for the designations shown in Table 6. The coating

mass is the total amount of coating on both sides of the sheet, expressed in grams per square metre. The

interested parties shall agree upon the coating mass of differentially coated products. If a maximum

coating mass is required, the manufacturer shall be notified at the time of ordering.

5.5.3 Coating adherence

Aluminium-silicon alloy-coated steel sheet shall be capable of being bent in any direction, in accordance

with the mandrel diameter requirements of Table 7, without flaking of the coating on the outside of

the bend. Flaking of the coating within 7 mm from the edge of the test piece shall not be a cause for

rejection.
Table 6 — Coating mass (total both sides)
Minimum check limit
Triple-spot test Single-spot test
Coating mass designation
2 2
g/m g/m
AS040 40 30
AS060 60 45
AS080 80 60
AS100 100 75
AS120 120 90
AS150 150 115
AS200 200 150
AS300 300 240

NOTE 1 Because of the many variables and changing conditions that are characteristic of continuous aluminium-silicon

coating, the coating mass is not always evenly divided between the two surfaces of an aluminium-silicon-coated sheet;

neither is the aluminium-silicon coating evenly distributed from edge to edge. However, it can normally be expected that

not less than 40 % of the single-spot check limit will be found on either surface.

NOTE 2 The coating thickness can be estimated from the coating mass by using the following relationship: 100 g/m total

mass both sides ≅ 0,033 mm total thickness both sides.
6 © ISO 2019 – All rights reserved
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ISO 5000:2019(E)
Table 7 — Coating adherence — Bend test mandrel diameter
Base-metal quality Coated metal – 180° bend mandrel diameter, mm
Coating designation
e < 1,25 e ≥ 1,25
Designation Grade
AS200 AS200
Up to AS120 AS150 Up to AS120 AS150
AS300 AS300
01 Commerc
...

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