Is 1865 - 3
Uploaded by
Svapnesh ParikhIs 1865 - 3
Uploaded by
Svapnesh ParikhIs 1865 : 1991
Indian Standard
IRON CASTINGS WITH SPHEROIDAL OR
NODULAR GRAPHITE - SPECIFICATION
( Third Revision)
1 SCOPE 3.1.1 These grades apply to castings from sand
moulds of comparable thermal ‘diffusivity. Subject
1.1 This standard covers grades and the require- to agreement these may also apply to casting
ments of iron casting with spheroidal or nodular obtained by other methods such as from static
graphite classified on tbe basis of: moulds or centrifugal castings. They, however, do
a) mechanical properties measured on test not apply to castings obtained by continuous cast-
pieces prepared from separately-cast test ings.
samples, and 3.2 Grades Based on Mechanical Properties
b) mechanical properties measured on test Measured on Cast-On Samples
pieces prepared from cast-on test samples. The following six grades of spheroidal cast iron for
this category are:
i.2 Grades and requirements of spheroidal cast
iron, classified on the basis of hardness are given in SG 700/2A, SG 600/3A, SG 500/7A, SG 400/15A,
Annex A. These are subject to the mutual agree- SG 400/ I8A and SG 350/22A.
ment between the purchaser and the manufacturer. 3.2.1 These grades normally apply to castings of
thickness between 30 mm and 200 mm and with a
2 REFERl?,NCES
unit mass greater than 2 000 kg.
2.1 The following Indian Standards are necessary NOTE -The letter ‘A’ after the designation of the
adjuncts to this standard: grade indicates that the properties are obtained on
IS No. Title cast-on test samples to distinguish them from those
obtained on separately-cast test samples given in 3.1
1387 : 1967 General requirements for the
supply of metallurgical materials 4 SUPPLY OF MATERIALS
(first revisioti )
4.1 General requirements relating to the supply of
1500: 1983 Method for Brine11 hardness test spheroidal cast iron shall conform to IS 1387 :
for metallic materials ( second 1967.
revision )
1608 : 1972 Method for tensile testing of steel 5 MANUFACTURE
products (first revision ) 5.1 The method of manufacture, including the
1757: 1988 Method for cbarpy impact test chemical composition and the heat treatment,
( V notch) for metallic materials shall be left to the discretion of the manufacturer
( second revision ) who shall ensure that the property requirements
7754 : 1975 Method for designation of the specified in this standard are complied with the
microstructure of graphite in cast grade specified in the order. Record of heat-treat-
iron ment. if any, of each batch shall be maintained by
the manufacturer.
8350; 1977 Deviations for untoleranced
dimensions of spheroidal or 5.2 For the castings to be used. in special applica-
nodular graphite iron castings tions, however, the type of sample, chemical coni-
position, inspection, and beat treatment may be as
3 GRADES per the agreement between the purchaser and the
3.1 Grades Based on Mechanical Properties manufacturer.
Measured on Separately-Cast Test Samples
6 WORKMANSHIP AND FINISH
The following nine grades of spheroidal graphite 6.1 The castings shall be accurately moulded ( and
cast iron for this category are: cored ) in accordance with the pattern equipment
SG 900/2, SG 800/Z, SG 700/2, SG 600/3, SG and/or working drawings supplied by the purchaser
500/7, SG 450/10, SG 400/l 5, SG 400/18 and with addition of such letters, figures or marks as
SO 350122. specified.