Product Description
Key Specifications/Special Features:
Introduction
Super alloys have the ability to function at very high temperatures and mechanical stress, and also where high surface stability is required. They have good creep and oxidation resistance, and can be produced in a variety of shapes. They can be strengthened by solid-solution hardening, work hardening, and precipitation hardening.
Super alloys consist of a number of elements in a variety of combinations to achieve the desired result. They are further classified into three groups such as cobalt-based, nickel-based, and iron-based alloys.
Incoloy (r) alloy 825 is an austenitic nickel-iron-chromium alloy which is added with other alloying elements in order to improve its chemical corrosion resistant property. The following datasheet will provide more details about Incoloy (r) alloy 825.
Chemical Composition
The following table shows the chemical composition of Incoloy (r) alloy 825.
Element content (%)
Nickel, Ni38-46
Iron, Fe22
Chromium, Cr19.5-23.5
Molybdenum, Mo2.50-3.50
Copper, Cu1.50-3.0
Manganese, Mn1
Titanium, Ti0.60-1.20
Silicon, Si0.50
Aluminum, Al0.20
Carbon, C0.050
Sulfur, S0.030
Physical Properties
The physical properties of Incoloy(r) alloy 825 are given in the following.
Properties metric imperial
Density8.14 g/cm³0.294 lb/in³
Melting point1385°C2525°F
Mechanical Properties
The mechanical properties of Incoloy(r) alloy 825 are highlighted in the following.
Properties metric imperial
Tensile strength (annealed)690 MPa100000 psi
Yield strength (annealed)310 MPa45000 psi
Elongation at break (annealed prior to test)45%45%
Thermal Properties
The thermal properties of Incoloy(r) alloy 825 are outlined in the following.
Properties metric imperial
Thermal expansion co-efficient (at 20-100°C/68-212°F)14 µm/m°C7.78 µin/in°F
Thermal conductivity11.1 W/mK77 BTU in/hr.ft².°F
Other Designations
Other designations that are equivalent to Incoloy(r) alloy 825 include:
ASTM B163
ASTM B423
ASTM B424
ASTM B425
ASTM B564
ASTM B704
ASTM B705
DIN 2.4858
Fabrication and Heat Treatment
Machinability
Incoloy(r) alloy 825 can be machined using conventional machining methods which are used for iron-based alloys. Machining operations are performed using commercial coolants. High-speed operations such as grinding, milling or turning, are performed using water-based coolants.
Forming
Incoloy(r) alloy 825 can be formed using all conventional techniques.
Welding
Incoloy(r) alloy 825 is welded using gas-tungsten arc welding, shielded metal-arc welding, gas metal-arc welding, and submerged-arc welding methods.
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