IS IS 7520 Grade 2 Cast steels

Material group: Ferrous Alloys / Cast steels
Country / Standard: India / IS

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IS IS 7520 Grade 2 Chemical Composition

CRITERIA
VALUE
UNIT
CAS NUMBER
CRITERIA
C
VALUE
≤ 1.0
UNIT
%
CAS NUMBER
7440-44-0
CRITERIA
Mn
VALUE
≤ 0.5
UNIT
%
CAS NUMBER
7439-96-5
CRITERIA
P
VALUE
≤ 0.25
UNIT
%
CAS NUMBER
7723-14-0
CRITERIA
S
VALUE
val1
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UNIT
%
CAS NUMBER
7704-34-9
CRITERIA
Si
VALUE
val1
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UNIT
%
CAS NUMBER
7440-21-3

IS 7520: 1974 / Specification for corrosion-resistant high silicon iron castings

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IS IS 7520 Grade 2 Heat Treatments

  • The casting shall be stripped from the mould while hot and as soon as possible after solidification and with the least possible delay, the hot castings shall be charged direct to a furnace previously heated to a temperature approx. 600°C and maintained at that temperature during the period of charging the castings. When the furnace is finally charged, the castings shall be uniformly heated to a temperature of not less than 750°C and not more than 850°C. They shall be soaked at this temperature for a period varying from 2h for small castings of simple form and t<= 188mm up to 8h, according to section and design for heavy castings shall be slowly cooled in the furnace and not removed until the temperature has fallen below 300°C.

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