Limiting Chemical Composition, %

Cr - 19.0 – 23.0
Mo - 15.0 – 17.0
W - 3.0 – 4.4
Ti - 0.02 – 0.25
Si - 0.08 max.
P - 0.04 max.
Ni - Balance
Fe - 1.0 max.
C - 0.01 max.
Mn - 0.75 max.
S - 0.02 max.

Typical Mechanical Properties (Solution Annealed)

Tensile Strength, ksi •••••• 110
MPa •••••• 758
Yield Strength (0.2% Offset), ksi •••••• 55
MPa •••••• 379
Elongation, % •••••• 60
Hardness (HRB) •••••• 85 – 95

Physical Constants and Thermal Properties

Density, Ib/in3 •••••• 0.315
g/cm3 •••••• 8.73
Melting Range, °F •••••• 2440 – 2516
°C •••••• 1338 – 1380
Specific Heat, Btu/lb •°F •••••• 0.089
J/kg • °C •••••• 373
Permeability at 200 Oersted (15.9 kA/m) •••••• 1.001
Coefficient of Expansion, 70 – 200°F, 10-6 in/in • °F •••••• 6.67
20 – 100°C, μm/m • °C •••••• 11.97
Electrical Resistivity, ohm• circ mil/ft •••••• 744.4
μΩ•m •••••• 1.237

Specifications and Designation

UNS N06686
ASTM B 564, B 574, B 575,
B 619, B 622, B 626,
B 751, B 775, B 829
DIN 17744, 17750 – 17754
Werkstoff Nr. 2.4606
ASME Code Case 2198
ASME SB-564, SB-574,
SB-575, SB-619, SB-622,
SB-626, SB-751, SB-775,
SB-829
VdTÜV 515
NACE MR-01-75

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