Is 10774
Is 10774
Is 10774
Indian Standard
CORROSION RESISTANT HIGH ALLOY
STEEL AND NICKEL BASE INVESTMENT
CASTINGS FOR GENERAL APPLICATION -
SPECIFICATION
( First Revision )
@ BIS 1993
FOREWORD
This Indian Standard ( First 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 1983. While reviewing the standard in the light of the
experience gained during these years the committee has decided to revise this Indian Standard.
In this revision various clauses have been aligned with the recent standards on steel castings.
For the benefit of the purchaser and the manufacturer, typical applications of various grades of
castings specified in this standard have been included in Annex C.
In the preparation of this standard, assistance has been derived from the following publications:
BS 3146 ( Part 2 ) : 1985 Investment castings in metal in corrosion and heat resisting steels,
nickel and cobalt base alloys, British Standards Institution.
ASTM A743 - 1980 Corrosion - resistant, iron chromium, iron-chromium-nickel, and
nickel-base alloy castings for general application, American Society for Testing and Materials.
For 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 test or 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 off value should be the same as that of the specified
value in this standard.
IS 10774: 1993
Indian Standard
CORROSION RESISTANT HIGH ALLOY
STEEL AND NICKEL BASE INVESTMENT
CASTINGS FOR GENERAL APPLICATION -
SPECIFICATION
( First Revision )
I SCOPE 4 GRADES
This standard covers the requirements for This standard covers a total of fourteen grades
corrosion resistant high alloy steel and nickel of corrosion resistant high alloy steel and
nickel base investment castings for general
base investment castings for general applications. applications for general engineering purposes.
2 REFERENCES 5 SUPPLY OF MATERIAL
The Indian Standards listed in Annex A are 5.1 General requirements relating to supply of
necessary adjunts to this standard. these steel castings shall be as laid down in
IS 11709 : 1986.
3 TERMINOLOGY
5.2 General requirements relating to the supply
3.0 For the purpose of this standard, the of nickel base alloy investment castings shall be
following definitions shall apply. as agreed to between the manufacturer and the
3.1 Cast ( Melt ) purchaser.
1
IS 10774 : 1993
2
IS x0774 : 1993
3
Is 10774: 1993
LB,
65 mm
lOmm- 1Omm
+ t
IOmm
fkB
Gauge length = 5 D = 30 = G
9
Parallel length = L: 6 = 33.75
R = O-SD min
FIG. 2 TENSILE TEST PIECE
tactile examination. The purchaser shall specify e) Whether the manufacturer is or is nut
in the enquiry and order: contractually responsible for carrying out
the tests.
a>he
The type of non-destructive testing
intends to carry out or to have
which
carried 14.2 u n 1ess otherwise agreed uoon. when non-
out; destructive testing is to-be done, ‘the castings
b) The area or areas of the casting to which shall be examined as follows:
these tests apply, and the types of
discontinuity, where relevant; a) y7;;asonic examination as per IS 7666 :
,
Whether all, or what proportion, of the
castings are to be tested; b) Magnetic particle examination as per
IS 3703 : 1980,
4 The severity level defining the acceptabi-
lity or non-acceptability of defects which c) Liquid penetrant examination as per
may be revealed; and IS 3658 : 1981, and
4
IS 10774 : 1993
d) Radiographic examination as per IS 2595 : carried out; the details of the test shall be
1978. agreed to between the purchaser and the
manufacturer.
14.3 Uuless otherwise agreed upon the following
shall be the acceptance standards: 16.2 The castings shall not be peened, plugged
or impregnated to stop leakage. However,
a) IS 9565 : L986 for ultrasonic inspection. unless otherwise specified at the time of enquiry
b) IS 10724 : 1990 for magnetic particle and order, rectification and upgradation of a
inspection. casting by welding may be carried out in accor-
dance with the approved procedures as laid
c) IS 11732 : 1986 for liquid penetrant down in the relevant clause of the standard.
inspection.
17 METHOD OF SAMPLING
d) IS 12938 : 1990 for radiographic inspec-
tion ( Under Print ). 17.1 The method of sampling the steel castings
NOTE - Tn case of austenitic grades.. ultrasonic
for the purpose of chemical analysis and
inspection and magnetic pa_rticle inspectlon may not mechanical tests including re-test shall be in
ordinarily be feasible. accordance with IS 6907 : 1992.
15 REPAIR OF CASTINGS 18 MARKING
15.1 Unless otherwise specified by the purchaser 18.1 Each casting shall be legibly marked with
in the enquiry and order, castings may be recti- the following:
fied by welding. All repairs by welding shall be
carried out in accordance w~ith the procedure a) The number or identification mark by
laid down in IS 5530 : 1987. If castings have been which it is possible to trace the melt and
subjected to non-destructive testing by agree- the heat-treatment batch from which it
ment between the purchaser and the manu- was made;
facturer, the castings shall be re-examined in
the area of repair following any rectifying b) The manufacturer’s initials or trade-mark;
operation performed on the castings. and
15.2 To form the basis of an agreement between c) Other identification marks in accordance
the pu;chaser and the supplier in this-respect with any agreement between the pur-
where relevant, the following classification chaser and the manufacturer.
shall apply concerning the extent of repair: NOTE - ‘It is recommended that a minimum mar-
king be used’.
a>ding
Weld repair involving a depthnot excee-
20 percent of wall thickness or 25 mm, 18.2 By agreement between the purchaser and
whichever is lower, shall be termed as a the manufacturer, castings complying with the
minor repair. requirements of this standard may, after inspec-
b) Any weld repair exceeding the above tion, be legibly marked with an acceptance
shall be termed as a major repair. mark.
Further any single repair having an area 18.2.1 BIS Certification Marking
exceeding 250 mm square for every milli-
meter of wall thickness shall also be The use of the Standard Mark is governed by
deemed to be a major repair, regardless the provislons of Bureau of Indian Standards
ii;!: considerations mentioned in ( a ) Act, 1986 and the Rules and Regulations made
thereunder. The details of conditions under
which the licence for the use of Standard Mark
16 HYDRAULIC TEST may be granted to manufacturers or producers
16.1 When so specified by the purchaser in the may be obtained from the Bureau of Indian
enquiry and the order, hydraulic test shall be Standards.
1s 10774 : 1993
ANNEX A
( Clause 2 )
LIST OF REFERRED INDIAN STANDARDS
IS No. Title ZS No. Title
228 Methods for chemical analysis 6(jOl : 1992 Permissible deviations in
of steels ( second revision ) chemical composition for pro-
duct analysis of steel castings
1500: 1983 Methods for brine11 hardness ( jirst revision )
test for metallic materials 6907 : 1992 Methods of sampling steel
( second revision ) castings ( second revision )
1608: 1972 Methods for tensile testing 7666 : 1988 Recommended procedure for
of steel products ( first ultrasonic examination of
revision ) ferritic castings of carbon
and low alloy steel
1757 : 1988 Method for charpy impact test
( V-notch ) for metallic mate- 9565 : 1986 Acceptance standards for
rial ( second revision ) ultrasonic inspection of steel
castings ( jirst revision )
2595 : 1978 Code of practice for radio- 10724. ,g90
Acceptance standards for
graphic testing (first revision ) ’
magnetic particle inspection
3658 : 1981 Code of practice for liquid of steel castings
penetrant flaw detection (first 11709 : 1986 Technical delivery conditions
revision ) for investment castings of
steel
3703 : 1980 Code of practice for magnetic
particle flaw detection (first 11732 : 1986 Acceptance standards for dye
revision ) penetrant inspection of steel
castings
5530 : 1987 Code of procedure for repair
and rectification of steel 12938 : 1990 Acceptance standards for
castings by metal arc welding radiographic inspection of
process (first revision ) steel castings
ANNEX B
( Clause 7 )
INFORMATION TO BE SUPPLIED BY THE PURCHASER
6
IS 10774: 1993
ANNEX C
( See Foreword )
C-l For the guidance of the manufacturer and Grade Application
the users, typical applications of castings, Components where good corrosion resis-
covered by this standard are given below: 8
tance and resistance to abrasion is
Grade Application required.
1 General service pump, valves for chemi- 0 Valve trim abrasion and corrosion resis-
cal processing, oil refineries, textile tance applications.
dyeing, food machinery, architectural
trim, fuel jets, fuel valves, engine 10 Simi!ar to grade 2 but used where
supports. resistance to intergranular corrosion
also reuired.
2 Pumps, valves, fittings in reducing acids,
paper mill equipment, process industries, 11 Similar to grade 2 but used where the
sea water service. chance of pitting corrosion is more
severe.
3 Similar to grade I but especially useful
where parts cannot be heat-treated after 12 This is used in handling corrosive
welding. vapours above 400°C. It is mainly used in
dairy, chemical, aeronautical, nuclear,
4 Similar to grade I but for less severe petroleum and food processing indus-
service. tries.
5 Paper pulp service, digester fittings, 13 This alloy~shows outstanding resistance
pumps, impellers, strainers, valves, orna- to such highly corrosive chemicals as
ments, tire wall fittings, hard rail, wet chlorine, strong hypochlorite solu-
fittings, grills. tions, ferric chloride and cupric chloride
6 Sulphate liquor, cold dilute sulphuric and many of its applications are in
acid service, agitators, fittings. handling of these chemicals.
7 Valves and valve trims, pump parts for 14 These alloys have resistance to hot
power plant and oil refining equipment, concentrated hydrochloric acid solu-
sliding or wearing parts. tions and wet hydrogen chloride.
Bureau of Indian Standards
BIS is a statutory institution established under the Bureau of Indian Standards Act, 1986 to
promote harmonious development of the activities of stadardization, marking and quality
certification of goods and attending to connected matters in the country.
Copyright
BIS has the copyright of all its publications. No part of these publications may be reproduced
in any form without the prior permission in writing of BIS. This does not preclude the free use,
in the course of implementing the standard, of necessary details, such as symbols and sizes, type
or grade designations. Enquiries relating to copyright be addressed to the Director
( Publicaticns ), BIS.
( Page 2, clause 9.2 ) -Substitute ‘IS 11166 : 1993’for ‘IS 11166 :1984’.
( Page 3, clause 13.2 ) -Substitute the following for the existing:
‘13.2 The thickness or Dia of the As Cast Test Bar is ordinarily to be 18 2 3 mm.
However, size other than this may be agreed to between the manufacturer and
the purchaser.’
(MTD17)