Limiting Chemical Composition, %

Ni - 34.0-37.0
Fe - Remainder
Cr - 17.0-20.0
Si - 0.75-1.50
C - 0.08 max.
Mn - 2.0 max.
P - 0.030 max.
S - 0.030 max.

Typical Mechanical Properties (Solution Annealed)

Rupture Strength (1000 h)

Physical Constants and Thermal Properties

Density, Ib/in3 •••••• 0.292
g/cm3 •••••• 8.08
Melting Range, °F •••••• 2520 – 2590
°C •••••• 1380 – 1420
Specific Heat, Btu/lb •°F •••••• 0.11
J/kg • °C •••••• 460
Permeability at 200 Oersted (15.9 kA/m) •••••• 1.02
Coefficient of Expansion, 10-6 in/in • °F (μm/m • °C)
75 – 200°F (24 – 93°C) •••••• 8.3 (14.9)
Thermal Conductivity, Btu • in/ft2•h•°F •••••• 86
W/m• °C •••••• 12.4
Electrical Resistivity, ohm• circ mil/ft •••••• 612
μΩ•m •••••• 1.017

Specifications and Designation

UNS N08330
ASTM B511, B512, B535,
B536, B546, B710
ASME SB-511, SB-536, SB-710, Boiler Code Sections I, VIII, IX
SAE AMS 5592, 5716
SAE J405, J412

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