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INTERN AT1 O NA L ORGANIZATION FOR STAND A RD I ZATl O N
IS0 RECO M M EN DATION
R 428
CLASS1 FICATION
OF ALUMINIUM BRONZES AND SPECIAL ALUMINIUM BRONZES
1st EDITION
March 1965
COPYRIGHT RESERVED
The copyright of IS0 Recommendations and IS0 Standards
belongs to IS0 Member Bodies. Reproduction of these
documents, in any country, may be authorized therefore only
by the national standards organization of that country, being
a member of ISO.
For each individual country the only valid standard is the national standard of that country.
Printed in Switzerland
Also issued in French and Russian. Copies to be obtained through the national standards organizations
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BRIEF HISTORY
The IS0 Recommendation R 428, ClassiJication of Aluminium Bronzes and Special Alu-
minium Bronzes, was drawn up by Technical Committee ISO/TC 26, Copper and Copper Alloys,
the Secretariat of which is held by the Deutscher Normenausschuss (DNA).
Work on this question by the Technical Committee began in 1960 and led, in 1962, to the
adoption of a Draft IS0 Recommendation.
In December 1962, this Draft IS0 Recommendation (No. 545) was circulated to all the
IS0 Member Bodies for enquiry. It was approved, subject to a few modifications of an editorial
nature, by the following Member Bodies :
Australia Germany Romania
Belgium Greece Spain
Brazil India Sweden
Canada Iran Switzerland
Chile Italy Turkey
Denmark Japan United Kingdom
Finland Netherlands U.S.S.R.
France Poland Yugoslavia
No Member Body opposed the approval of the Draft.
The Draft IS0 Recommendation was then submitted by correspondence to the IS0 Council,
which decided, in March 1965, to accept as an IS0 RECOMMENDATION.
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II
ISO/R 428 - 1965 (E)
IS0 Recommendation R 428 March 1965
CLASSIFICATION
OF ALUMINIUM BRONZES AND SPECIAL ALUMINIUM BRONZES
1. SCOPE
This IS0 Recommendation relates to the chemical composition and forms of semi-manufactured
products of the following wrought copper alloys:
Aluminium bronzes,
Special aluminium bronzes,
currently available in commercial quantities.
It is intended as a classification and not as a specification for the various types. For the Classi-
fication principles, see Appendix.
2. GENERAL
The chemical compositions given below show only the main constituent elements and usual
impurities. It is the responsibility of the supplier to ensure that any element not specifically
limited by this IS0 Recommendation is not present in an amount such as is generally accepted
as having an adverse effect on the product. If the purchaser’s requirements necessitate limits
for any element not specified, these should be agreed upon between supplier and purchaser.
3. CHEMICAL COMPOSITION (PER CENT)
The following Classification of Aluminium bronzes includes the alloys most usually manufac-
tured, but it should be realised that there are many differing compositions for the same end-use.
In particular, attention is called to the possible substitution of manganese for iron, either wholly
or in part. The introduction of such changes can have an appreciable effect on the mechanical
or other properties of these alloys and, therefore, in cases where deviations from the given com-
positions are required, the manufacturer should be consulted.
3.1 Aluminium bronzes
TABLE 1
Average
Maximum impurities
density *
hignation Al
Mn Ni As Cu
Fe 1 Zn 1 Total kg/dm3
Cu A15 4.0-7.0 0-0.5 0-0.5 0-0.4 The re- 0.5 0.5 0.6 8.2
0-0.5
CU A18 7.0-9.0 0-0.5 - mainder 0.5 ~ 0.5
...