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IS 2644 (1994): High tensile steel castings [MTD 14:
Foundry]
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Indian Standard
HIGHSTRENGTHSTEELCASTINGSFOR
GENERALENGINEERINGANDSTRUCTURAL
PURPOSES-SPECIFICATION
( Fourth Revision
Second Reprint MARCH 1997
UDC
669*14*018*295-14
0 BIS 1994
BUREAU
MANAK
OF
BHAVAN,
INDIAN
9 BAHADUR
NEW DELHI
June 1994
STANDARDS
SHAH
ZAFAR
MARG
110002
Price Group 3
Steel Castings Sectional
Committee,
MTD 17
FOREWORD
This Indian Standard ( Fourth Revision ) was adopted by the Bureau of Indian Standards,
after the
draft finalized by the Steel Castings Sectional Committee had been approved by the Metallurgical
Engineering Division Council.
This standard was first published in 1964 and was revised in 1969, 1979 and 1986. While reviewing the
standard in the light of the experience gained during these.years the committee has decided that the
standard may be further revised. In this revision various clauses have been aligned with the recent
standards on steel castings.
High strength steel castings have, in addition to high strength, good toughness and often good weldability. These castings find extensive use in transportation
equipment, agricultural machinery parts and
general engineering, as structural parts.
In the preparation
of this standard,
cast steels for general engineering
Standardization
( IS0 ).
assistance has been derived from ISO/DIS 9477 High strength
Organization for
and structural purposes, issued by International
For the purpose of deciding whether a particular requirement of this standard
value, observed or calculated, expressing the result of a test or analysis, shall
ance with IS 2 : 1960 Rules for rounding off numerical values ( revised).
places retained in the rounded off value should be the same as that of
standard.
is complied with, the final
be rounded off in accordThe number of significant
the specified value in this
Is2644:1994
Indian Standard
HIGH STRENGTH STEEL CASTINGS FOR
GENERAL ENGINEERING AND STRUCTURAL
PURPOSES - SPECIFICATION
( Fourth Revision
7 PARTICULARS
ORDERING
1 SCOPE
This standard covers the requirements for high
strength steel castings for general engineering
and structural purposes.
TO BE SPECYFIED WHILE
For the benefit of the purchaser, particulars
be specified while ordering for steel castings
this specification are given in Annex B.
to
to
2 REFERENCES
8 CHEMICAL
The Indian Standards listed in Annex
necessary adjuncts to this standard.
A are
8.1 The ladle analysis
of steel when carried out
either by the method specified in IS 228 and its
relevant parts or any other established instrumental/chemical
methods shall be as given in
Table I. In case of dispute, the procedure given
in IS 228 shall be the referee method. However,
where the method is not given in IS 228, the
referee method shall be as agreed to between
the purchaser and the manufacturer.
3 TERMINOLOGY.
3.0 For the purpose of this standard,
following definitions shall apply.
the
3.1 Cast ( Melt )
The product
of any of the following:
a ) One furnace
COMPOSITION
Table 1 Chemical Composition of High
Strength Steel Castings
heat,
b) One crucible heat, or
c) A number of furnace or crucible heats of
Constituent
similar composition mixed in a ladle or
tapped in separate ladles and poured
simultaneously for making a casting.
3.2 Batch
group of castings of one grade of material,
c:<st from the same melt and heat-treated together under identical conditions.
Reqairem;O:
Percent
Silicon
060
Sulphur
0035
Phosphorus
0035
8.2 The manufacturer
shall carry out analysis
from a sample of each melt of steel and, if so
specified by the purchaser at the time of enquiry
and order, shall supply a test certificate
of
chemical analysis of the sample of steel for
each melt.
4 GRADES
This standard covers a total
high strength steel castings.
of five grades
of
8.3 Product Analysis
5 SUPPLY OF MATERIAL
If specified at the time of enquiry and order,
the product analysis may be carried out from a
test piece or from a casting representing each
melt. Drillings for analysis shall be taken from
not less than 6 mm beneath the cast surface,
and in such a manner as not to impair the usefulness of any casting selected. The permissible
variation in product analysis from the limits
specified in Table I shall be as given in IS 6601 :
1987.
Gener;!I requirements relating to supply of steel
c::stings
bhall be as laid down in IS 8800 : 1986.
6 MANUFACTURE
The steel for the castings shall be made by
eicctric ate or electric induction or such other
l)rocesbcs as m:iy be agreed to between the
purch;!yer and the manufacturer.
1
Is2644:1994
8.4 Residoal Elements
11 FETTLING AND DRESSING
Analysis and reporting of the analysis in the
test certificate
for the residual elements shall
be done only when so specified by the purchaser
in the enquiry and order. However, the manufacturer shall ensure that the residual elements
are within the limits, when such limits are
specified by the purchaser in the enquiry and
order.
All castings
cl;t;.sedd, and
9 WORKMANSHIP
12 HEAT TREATMENT
12.1 The castings shall be heat-treated
in a
properly
constructed
furnace,
having adequate means of temperature control, which shall
permit the whole of the castings being uniformly heated to the necessary temperature.
All castings shall be suitably heat treated so as
to attain the specified mechanical properties.
AND FINISH
9.1 The castings shall be accurately moulded in
accordance
with the pattern or the working
drawings supplied by the purchaser
with the
addition of such letters, figures and marks as
may be specified.
12.2 The test pieces shall be heat treated
with the casting they represent.
13 MECHANICAL
9.2 The purchaser shall specify the tolerances
on all important dimensions. On other dimensions, tolerances specified in IS 4897 : 1994 shall
apply.
10 FREEDOM
shall be properly
fettled
and
all surfaces shall be thoroughly
along
TESTS
13.1 The mechanical
properties specified are
those which are to be obtained from test bars
cast either separately from or attached to the
castings to which they refer and heat treated
as given in 12. The test values so exhibited;
therefore,
represent the quality of steel from
which the castings have been poured, they do
not necessarily represent the properties of the
castings themselves.
FROM DEFECTS
10.1 All castings shall be free from defects that
will adversely affect machining
or utility of
castings.
13.2 The tensile test shall be carried out in
accordance
with IS 1608 : 1972. The relevant
be
as
given
mechanical
properties
shall
in Tabl: 2.
10.2 When necessary to remove risers or gates
by flame or arc or a combination thereof, or by
any other process involving intense heat, care
shall be taken to make the cut at a sufficient
dtstance from the body of the casting so as to
prevent any defect being introduced into the
casting due to local heating. Any such operation
is to be done before final heat treatment.
13.3 7 he Brine11 Hardness when tested in accordance with IS1500 : 1983 shall be as specified
in Table 2.
13.3.1 The hardness test shall be carried out on
the ends of tensile test specimens or when so
stated in the enquiry and order, on castings
preferably on a rectangular pad 20 mm x 40 mm
so located on the casting as to permit proper
mounting on the Brine11 tester. The location
is taken shall be
where hardness
reading
properly prepared
to eliminate
the effect of
10.3 In the event of any casting proving defective from foundry causes in the course of preparation, machining or erection,
such casting
may
be rejected notwithstanding
any previous
testing
and/or
certification
of satisfac:ory
inspection.
Table 2 Mechanical Properties of High Strength Steel Castings for
General Engineering aad Structural Purpose
( Clauses 13.2 and 13.3 )
Property
C---------Gr I
CS 640
640
390
Grade+
Designation+
Tensile strength, MPa, Min
Yield stress, ( 05 percent proof stress ),
MPa, Min
Elongation,
percent, kfin
Reduction in area. percent, Min
Charpy, V-notch impact) value, J, Min
Brine11 Hardness, HB, Min
NOTE - Impact test is optional.
15
35
25
190
Requirement
.A______.-.____._>
Gr2
Gr 3
Gr 4
CS 700
cs 840
cs 1030
700
840
1 030
580
700
850
14
30
25
207
12
28
20
248
8
20
15
305
cs
Gr 5
1230
I 230
I 001;
5
12
-.
355
IS 2644 : 1994
surface variables.
The frequency
of Brine11
Hardness inspection on castings shall be as per
agreement between the purchaser and the manufacturer and shall be indicated in enquiry and
order.
of section
thickness
in
NOTE - Due to variation
the hardness
as measured on the
actual castings,
casting may deviate from the specified values for the
test bar by up to + 20 percent.
TESTS
Unless otherwise specified in the enquiry and
order, or otherwise agreed to, the Carbon
Equivalent ( C.E. ) for the purpose of guidance
in determination
of the pre- and post-weld
treatment applicable to carbon and low alloy
steels shall be computed as follows:
14.2 Unless otherwise agreed upon, when nondestructive
testing is to be done, the castings
shall be examined as follows:
d) Radiographic
IS 2595 : 1978.
Cr+Mo+V -+
. . =C+_t!!!._+
6
5
as per IS 7666 :
examination
CE
as
per
~-Ni + Cu
15
as
per
15.4 The welding procedure to be followed for
any welding that may be required on the surface
hardened area, if any, shall be as agreed to.
as
per
16 METHOD
OF SAMPLING
The method of sampling the steel castings for
the purpose of chemical analysis and mecbanical tests including re-test shall be in accordance
with IS 6907 : 1992.
14.3 Unless otherwise agreed upon the following shall be the acceptance standards:
a) IS 9585 : 1986 for ultrasonic
the basis of an agreement between
and the supplier in this respect,
classification shall apply concernof repair:
15.3 Carbon Equivalent
e) Whether the manufacturer
is or is not
contractually responsible for carrymg out
the tests.
c) Liquid penetrant
examination
IS 3658 : 1981, and
OF CASTINGS
b) Any weld repair exceeding
the above
shall be termed as a major repair. Further any single repair having an area
excleding 250 mm square for every millimetre of wall thickness
shall also be
deemed to be a major repair, regardless
c$&
considerations
mentioned
in (a)
.
d) The severity level defining the acceptability or non-acceptability
of defects which
may be revealed; and
examination
inspec-
a) Weld repair involving a depth not exceeding 20 percent of wall thickness or 25 mm,
whichever is lower, shall be termed as a
minor repair;
b) The area or areas of the casting to which
these tests apply, and the types of discontinuity, )vhere relevant;
c) Whether all, or what proportion,
of the
castings are to be tested;
b) Magnetic particle
IS 3703 : 1980,
d) IS 12938 : 1990 for radiographic
tion.
15.2 To form
the purchaser
the following
ing the extent
a) The type of non-destructive
testing which
he intends
to carry out or to have
cal ried out ;
examination
inspec-
15.1 Unless otherwise specified by the purchaser in the enquiry and order, castings may
be rectified by welding. All repairs by welding
shall be carried out in accordance, with the
procedure
laid
down in IS 5530 : 1987. If
castings have been subjected to non-destructive
or bydraluic testing by agreement between the
purchaser and the manufacturer,
the castings
shall be re-examined
in the area of repair
following any rectifying operation performed on
the castings.
14.1 Non-destructive
testing shall be applied if
so specified in the euquiry and the order. Under
this heading are grouped the tests, which aim
at revealing defects which cannot be revealed
by a simple visual examination, such as penetultrasonic,
X-radiorant, magnetic particle,
inspection;
graphic, or gamma-radiographic
also included under this heading are tests on
the surface condition by visual or visual-tactile
examination. The purchaser shall specify in the
enquiry and order:
a) Ultrasonic
1988,
c) IS 11732 : 1986 for dye penetrant
tion; and
15 REPAIR
13.4 If specified in the enquiry and order, the
impact test shall be carried out in accordance
with IS 1757 : 1988and the values obtained shall
conform to the requirements given in Table 2.
14 NON-DESTRUCTIVE
b) IS 10724 : 1988 for magnetic particle
inspection;
inspection;
3
IS 2644 : 1994
17 MARKING
17.2 By agreement
17.1 Each casting shall be legibly
and indelibly
marked with the following:
a) The number or identification
mark by
which it is possible to trace the melt and
the heat-treatment
batch from which it
was made;
b) The manufacturers initials or trade-mark;
and
c) Other identification
marks in accordance
with any agreement between the purchaser
and the manufacturer.
NOTE - 1~ is recommended that il minimum of
markings be used.
between the purchaser
and
the manufacturer,
castings complying with the
requirements of this standard may, after ins.
pection, be legibly marked with an acceptance
mark.
17.2.1 The castings
may also be marked with
the Standard Mark.
The use of Standard
Mark
is governed
by
the
provisions
of Bureau of Indian Standards Act, 1986 and
the Rules and Regulations
made thereunder.
The details of conditions
under which the
licence for the use of Standard Mark may be
granted to manufacturers
or producers may be
obtained from the Bureau of Indian Standards.
ANNEX
( Clause 2 )
LIST OF REFERRED
IS No.
228
Title
INDIAN STANDARDS
IS No.
Methods for chemical anof steels
( second
alysis
6601 : 1987
Permissible
deviations
in
chemical
Composition
for
products
analysis
of steel
castings (first revision )
6907 : 1992
Methods of sampling of steel
castings (first revision )
7666 : 1988
Recommended
procedure for
ultrasonic
examination
of
ferritic
castings of carbon
and low alloy steel ( first
revision )
1500 : 1983
1608 : 1972
Methods for Brine11 Hardness
test for metallic
materials
( second revision )
Methods for tensile
of
steel
products
testing
( jirst
revision )
1757 : 1988
2595 : 1978
Methods for charpy impact
test ( V-notch ) for metallic
material ( second revision )
Code of practice for radiotesting
graphic
( first
revision )
8800 : 1986
Code of practice
penetrant
flaw
(first
for liquid
detection
9565 : 1986
Acceptance
standards
for
ultrasonic inspection of steel
castings (first revision )
10724 : 1988
Acceptance
standards
fdr
magnetic particle inLprction
of
steel
castings
( first
revision )
3703 : 1980
Code
magneti$arti%?~~~
tion (first revision )
4897 : 1994
Deviations
for untoleranced
dimensions and mass of steel
castings ( third revision )
5530 : 1987
Code of procedure for repaii
of steel
and rectification
castings by metal arc welding
process (first revision )
Technical delivery conditions
for steel castings ( second
revision )
revision )
3658 : 1981
Title
det? -
revision )
11732 : 1986
Acceptance
standards
fol
dye penetrant
inspection of
steel castings
12938 : 1993
Acceptance
radiographic
steel castings
standards
inspection
for
of
IS 2644 : 1994
ANNEX
( Clause 7 )
INFORMATION
B-l
BASIS
FOR
TO
BE SUPPLIED
ORDER
While placing an order for the purchase
of steel
castings covered by this standard,
the purchasci
should specify the following:
a) Material
b)
specification;
Drawing
or reference
number
of the
pattern
( if supplied
by the purchaser
),
along with a copy of the drawing:
BY THE
PURCHASER
c) Optior~al/Adctitional
any;
tests
r-equired,
if
tht: castings
are to be inspected
d) Whethsr
and
tested
in
the
presence
of the
purchasers
representative;
of delivery;
C) Condition
f) Any special requirement;
g) Test report,
if required.
and
Bureau of Indian Standards
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Standards Act, 1986 to promote
harmonious development of the activities of standardization, marking and quality certification of goods and
attending to connected matters in the country.
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Enquiries relating to copyright be addressed to the Director (Publication), BIS.
Review of Indian Standards
Amendments are issued to standards as the need arises on the basis of comments. Standards are also reviewed
periodically; a standard along with amendments is reaffirmed when such review indicates that no changes are
needed; if the review indicates that changes are needed, it is taken up for revision. Users of Indian Standards
should ascertain that they are in possession of the latest amendments or edition by referring to the latest issue
of BIS Handbook and Standards Monthly Additions.
This Indian Standard has been developed from Dot: No. MTD 17 ( 3938
Amendments
Amend No.
Issued Since Publication
Text Affected
Date of Issue
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