Generic Nicrosilal Cast irons

Material group: Ferrous Alloys / Cast irons
Country / Standard: Generic

Data updates

Latest Update: 2024-12
Total number of updates: 2
Update History
2017-10

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Generic Nicrosilal Chemical Composition

CRITERIA
VALUE
UNIT
CAS NUMBER
CRITERIA
C
VALUE
≤ 2.5
UNIT
%
CAS NUMBER
7440-44-0
CRITERIA
Cr
VALUE
≤ 3.0
UNIT
%
CAS NUMBER
7440-47-3
CRITERIA
Mn
VALUE
≤ 1.0
UNIT
%
CAS NUMBER
7439-96-5
CRITERIA
Ni
VALUE
val1
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UNIT
%
CAS NUMBER
7440-02-0
CRITERIA
Si
VALUE
val1
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UNIT
%
CAS NUMBER
7440-21-3

Nickel Institute website - Technical Literature,

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Generic Nicrosilal Physical Properties

Temperature

PROPERTY / VALUE
Electrical Resistivity
1.6 Ω∙mm²/m
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Thermal Conductivity
38 — 42 W/(m∙°C)
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Density
7.4 kg/dm³
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Electrical Conductivity
val1
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S/m
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This material has 4369 properties — only a subset is shown here.

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Generic Nicrosilal Heat Treatments

  • Stress relieve: This is done by heating to 600-650°C (1110-1200°F) at a rate of 50-100°C/hour (90-180°F/hour). The castings should be held in this temperature range for 2hours plus 1 hour per 25 mm (1 inch) of section thickness. They should then be furnace-cooled to or near ambient temperature. With castings made from Ni-resist alloys with the higher coefficients of expansion and with thin sections it is most important to have controlled, uniform heating and slow cooling.

    High temperature stability: Castings intended for static or cyclic service at 480°C (900°F) and above can be given a dimensional stabilization heat treatment. If not done, carbon is slowly removed from the austenite matrix while at service temperatures. This results in a small growth in volume and distortion can occur. When the heat treatment is used this problem is eliminated. The proper cycle is to heat to 850-900°C (1560-1650°F) at 50-100°C (90-180°F) per hour. The castings should be held in this temperature range for not less than 2 hours plus 1 hour for each 25 mm (1 inch) of section thickness followed by air cooling.

    Normalizing: The same heat treatment that is used for high-temperature stabilization can be used for normalizing. It will result in an increase in yield strength and elongation.

    Annealing: If the castings of the correct composition are higher in hardness than expected, excessive carbide formation has probably occurred. Some softening and improved machinability can be achieved through high temperature annealing. This heat treatment will breakdown and/or spheroidize some of the carbides. To anneal, castings should be heated to 950-1025°C (1740-1875°F) at 50-100°C (90-180°F) per hour. They should be held in this temperature range for 2 hours per 25 mm (1 inch) of section thickness followed by cooling in the furnace or in still air.

    Ambient temperature stability: For assured dimensional stability for service at ambient temperatures, slow, uniform heating to 815-840°C (1500-1560°F) if suggested. Castings should be held in this temperature range for one hour per 25 mm (1 inch) of section thickness and uniformly cooled to at least 315°C (600°F). For stringent requirements, the uniform cooling can be continued to ambient temperature.

Generic Nicrosilal Mechanical Properties

Temperature

PROPERTY / VALUE
Tensile Strength
190 — 280 MPa
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Brinell Hardness (HB)
140 — 250
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Elongation, A
2 — 3 %
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Generic Nicrosilal International Equivalent Materials

Showing 1 of 4 results.

MATERIAL
STANDARD
COUNTRY / PRODUCER
EQUIVALENCE CATEGORY
MATERIAL
FGL Ni20 Si5 Cr3
STANDARD
AFNOR NF
COUNTRY / PRODUCER
France
EQUIVALENCE CATEGORY
Implicit

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  • 4Cross References
  • 5Composition
  • 3Mechanical Properties
  • 6Physical Properties
  • 1Heat Treatment
  • -Metallography
  • -Machinability
  • -Stress-Strain
  • -Formability
  • -Fatigue
  • -Fracture
  • -Creep
  • -Joints
  • -Coatings
  • -Dimensions
  • -Tribology
  • 4348Corrosion
  • -Ageing
  • -Weatherability
  • -Irradiation
  • 2Total Suppliers