A-1 Wire Tech, Inc.
INCONEL® ALLOY 825

A nickel-iron-chromium alloy with additions of copper and molybdenum. It also contains niobium for stabilization against sensitization and resultant intergranular corrosion. The alloy has excellent resistance to general corrosion, pitting,and crevice corrosion in chemicals containing chlorides and sulfuric, phosphoric, and nitric acids. Used for tanks, piping, heat exchangers, pumps, valves, and other process equipment. Standard product forms are round, flats, pipe, tube, plate, sheet, strip, and wire.

Typical Mechanical Properties

Limiting Chemical Composition, %

Ni - 38.0-46.0
Fe - 22.0 min.
Cr - 19.5-23.5
Mo - 2.5-3.5
Cu - 1.5-3.0
Ti - 0.6-1.2
C - 0.05 max.
Mn - 1.0 max.
S - 0.03 max.
Si - 0.5 max.
Al - 0.20 max.

Typical Mechanical Properties (Annealed)

Tensile Strength, psi •••••• 100,000
MPa •••••• 690
Yield Strength(0.2%Offset), psi •••••• 45,000
MPa ••••••310
Elongation,% •••••• 45

 

Physical Constants and Thermal Properties

Density, Ib/in3 •••••• 0.294
g/cm3 •••••• 8.14
Melting Range, °F •••••• 2500 – 2550
°C •••••• 1370 – 1400
Specific Heat, Btu/lb •°F •••••• 0.105
J/kg • °C •••••• 440
Curie Temperature, °F •••••• <-320
°C •••••• <-196
Permeability at 200 Oersted (15.9 kA/m) •••••• 1.005
Coefficient of Expansion, 70 – 200°F, 10-6 in/in • °F •••••• 7.8
21 – 93°C, μm/m • °C •••••• 14.0
Thermal Conductivity, Btu • in/ft2•h•°F •••••• 76.8
W/m• °C •••••• 11.1
Electrical Resistivity, ohm• circ mil/ft •••••• 678
μΩ•m •••••• 1.13

Specifications and Designation

UNS N08825
BS 3072-3074, 3076 (NA16)
ASTM B163, B423 - B425,
B704, B705, B751
ASME SB-163, SB-423-SB-425,
Boiler Code Sections I, III, VIII, IX
DIN 17744, 17750-17752, 17754
Werkstoff Nr. 2.4858
VdTÜV 432
NACE MR-01-75
AFNOR NFe 32 C20DU


Copyright © 2007 Special Metals Corporation.
All rights reserved.