Limiting Chemical Composition, %

Ni. - 58.0 min.
Cr - 20.0-23.0
Mo - 8.0-10.0
Nba - 3.15-4.15
Fe - 5.0 max.
C - 0.10 max.
Mn - 0.50 max.
Si - 0.50 max.
S - 0.015 max.
Al - 0.40 max.
Ti - 0.40 max.
Cu - 0.015
P - 0.015 max.
Cob - 1.0 max.
______________

aPlus Ta.
bIf determined.

Typical Mechanical Properties (Solution Annealed)

Rupture Strength (1000 h)

Physical Constants and Thermal Properties

Density, lb/in3•••••• 0.305
Mg/m3•••••• 8.44
Melting Range, ºF••••••2350-2460
ºC•••••• 1290-1350
Specific Heat, btu/lb•ºF•••••• 0.098
J/kg•ºC••••••410
Curie Temperature, ºF•••••• < - 320
ºC••••••< - 196
Permeability at 200 oersted (15.9 kA/m)•••••• 1.0006
Coefficient of Expansion, 70-200ºF, 10-6 in/in•ºF•••••• 7.1
21-93ºC, µm/m•ºC••••••12.8
Thermal Conductivity, btu•in/ft2•h•ºF•••••• 68
W/m•ºC••••••9.8
Electrical Resistivity, ohm•circ mil/ft•••••• 776
µΩ•m•••••• 1.29

Specifications and Designation

UNS N06625
BS 3072, 3074, 3076 (NA21)
ASTM B443, B444, B446, B564, B704, B705, B751
ASME SB-443, SB-444, SB-446, SB-564, Boiler Code Sections I, III, VIII, IX
SAE AMS 5581, 5599, 5666, 5837
DIN 17744, 17750-17752, 17754
Werkstoff Nr. 2.4856
NACE MR-01-75
AFNOR NC 22 D Nb
VdTÜV 499

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