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Disclosure to Promote the Right To Information
Whereas the Parliament of India has set out to provide a
practical regime of right to
information for citizens to secure access to information under
the control of public authorities,in order to promote transparency
and accountability in the working of every public authority,and
whereas the attached publication of the Bureau of Indian Standards
is of particular interestto the public, particularly disadvantaged
communities and those engaged in the pursuit ofeducation and
knowledge, the attached public safety standard is made available to
promote thetimely dissemination of this information in an accurate
manner to the public.
!"#$% '(%)
!"# $ %& #' (")* &" +#,-. Satyanarayan Gangaram
Pitroda
Invent a New India Using Knowledge
/0 )"1 &2 324 #' 5 *)6 Jawaharlal Nehru
Step Out From the Old to the New
7"#1 &" 8+9&") , 7:1 &" 8+9&") Mazdoor Kisan
Shakti Sangathan
The Right to Information, The Right to Live
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Light Metals and Their Alloys Sectional Committee, MTD 7
FOREWORD
This Indian Standard Fourth Revision) was adopted hy the Bureau
of Indian Standards, after the draft finalizedhy the Light Metals
and TheirAlloys Sectional Committee had been approved by the
Metallurgical Engineering
Division Council.
This standard was first puhlished in 1956 and revised in 1965,
1974 and 1986. While reviewing this standard, inthe light of
experience gained during these years, the Committee decided to
revise it to bring in line with thepresent practices being followed
by the Indian industry.
In the present revision following modifications have been
made:
a) Ten new Grades 19 2 2453 26388 312 3 1500B, 52300, 52300B,
65028, 74538 and 76528 havebeen added.
b A new clause on references has been incorporated.
c) Temper designations have been modified.d A comparison IS and
ISO des ignations has been given in Annex A for information for mee
ting
domestic and export requirements.
Characteristics and typical uses various alloys have been given
in Annex B for information.
The composition of the Committee responsible for the formulation
of this standard is given in Annex C.
Fur the purpose of deciding whether a particular requirement of
this standard is complied with, the final value,observed or
calculated, expressing the result of a testor analysis, shall be
rounded off in accordance with IS 2 : 1960 Rules for rounding off
numerical values revised) . The number of significant places
retained in the rounded offvalue should be the same as that of the
specified value in this standard.
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IS 737: 2008
7.2 Bend Test f or Maler ial2 .6 mm an d Thinner
Unless otherwise stated, the bend test piece shall benot less
than 15 mm wide, of convenient length. andcut with its longer axis
transverse to the direction ofroll ing. The longer edges shall be
carefully roundedand smoothened longitudinally so thai the
cross-sectionof the test piece has approximately semi-circular
ends.
7.2.1 The test piece may be bent by hand to aU-form,and the p ie
ce t hus obt ained shall subsequently beclosed in a vice until the
inner surfaces of the test pieceare twice the specified radius
apart or are in generalcontact , if the test piece is to be closed
flat .
7.2.2 When tested in accordance with 7.2.1, the outersurface of
the bend shall not show any visible crack see IS 1599 .
8 CONDITION
The ma te rial shall be supplied in the con ditio n asspecified
by the purchaser. while specifying thecondi tion , the temper des
ignation as laid down inIS 5052 shall be followed.
9 DIMENSIONS AN D TOLERANCES
Th e dimensions and tolerances of sheet and strip shallbe as
given in IS 2676.
10 SELECTION OF TEST SAMPLES
10.1 Sheet a nd S tr ip of Aluminium or
Non-heatTreatableAluminium Alloy
Material of the same thickness, produced in the same
way, and of the same nominal composition shall beg ro up ed into
bat ches of not more than 4 00 0 kg.However, if a shee t or strip
in a s ingle coil exceeds4 000 kg in weight, it shall be deemed to
represent onebatch.
10.1.1 Mechanical tests shall be carried ont on eachbatch for
determining conformity of the material tothis standard.
10.1.2 Before the test samples are cut off, they shallbe marked
to identify them with the batch theyrepresent. Th e test sample
shall be taken from thematerial as supplied and shall not be
further annealed
or mechanically worked. Th e test samples may be cutand prepared
from the margins of the material beforecutting it to size.
10.2 Sheet an d Strip of Heat-Treatable AluminiumAlloys
One test sample shall be cu t from a sheet or stripselected from
each heat treatment batch. Before thetest samples arc cut off, they
shall be marked toidentifywith the heat treatment batch they
represent.
2
10.2.1 Unless otherwise agreed, the test samples shallbe tes ted
in the 0, T4 or T6 conditions that is in thesame condition in which
the material is to be supplied .Th e test sample, a fter heat
treatment, shall no t bemechanically worked before being
tested.
10.2.2 Material in the condition, when heat-treated,may have
properties of the order of 15 MP a less than
the specified properties for the T4 or T6 conditions
asappropriate.
10.2 .2 .1 Unless o therwise agreed , the tests shall becarried
ou t e ither in T4 or in T6 condition. The tests am pl es s ha ll
no t be fur ther h eat -trealed o rmechanically worked except for
making the test piecebefore being tested. The test samples may be
cu t fromthe margins of the material before cutting it to size.
l IRETESTS
11.1 If a les t does not give the speci fied result s,
twoadditional samples from the same ba tc h sh all be
selected for testing, one of which shall be from thesheet or
strip from which the original test sample wastaken, unless that
sheet or strip has been withdrawn byth e supplier. B ot h r et es
ts s ha ll conform to therequirements of this standard, otherwise,
the lot shallbe rejected.
11.2 Unless otherwise agreed, the supplier shall havethe discre
t ion to r e-heat t re at t he mater ia l heattreatable alloys ,
not exceeding 2 re-heat treatments,before the two further samples
are selected.
11.2.1 If a test does not give the specified results,
twoadditional samples from th e sam e b atc h shall be
selected for testing. Both retests shall conform to
therequirements of this standard, otherwise, t lot shallbe
rejected.
12 MARKING
12.1 Each package/coil of sheet s and strip s may besuitably
marked for identif icat ion, with the name ofthe manufacturer,
grade, condition of the material andbatch number. The supplier
shall furnish a certificatethat th e m at er ia l s up pl ie d c om
pl ie s with therequirements of this standard.
12.1.1 BIS Certification Marking
The material may also be marked with the StandardMark.
12.1.1.1 Th e use of the Standard Mark is governed bythe
provision of the Bureau Indian Standards Act1986 and the Rules and
Regulations made thereunder.The detai ls of the conditions under
which the licencefor the use of the Standard Mark may be granted
tomanufacturers or producers may be obtained from theBureau of
Indian Standards.
