A nickel-iron low-expansion alloy containing 36% nickel. It maintains nearly constant dimensions over the range of normal atmospheric temperatures, and has a low coefficient of expansion from cryogenic temperatures to about 500°F (260°C). The alloy also retains good strength and toughness at cryogenic temperatures. Used for standards of length, measuring devices, laser components, bi-metal thermostat strip, thermostat rods and tanks and piping for storing and transporting liquefied gases.

STANDARD PRODUCT FORMS

Pipe, tube, sheet, plate, round bar, forging stock and wire.

MAJOR SPECIFICATIONS

UNS K93600, K93601, DIN 385, 1715, Werkstoff Nr. 1.3912

LIMITING CHEMICAL COMPOSITION, %

Ni ......35.0 – 38.0
Fe ......Remainder
C ..........0.10 max.
Mn .......0.60 max.
P ........0.025 max.
S .......0.025 max.
Si .........0.35 max.
Cr ........0.50 max.
Mo .......0.50 max.
Co ..........1.0 max.

PHYSICAL CONSTANTS AND THERMAL PROPERTIES

Density, Ib/in³........................................................................0.293
g/cm³ .........................................................................8.11
Melting Temperature (Approximate), °F ........................2610
°C ........................1430
Inflection Point, °F ..................................................................430
°C ..................................................................220
Thermal Conductivity, Btu • in/ft² • h • °F ..........................69.3
W/m • °C ..........................................10.0
Coefficient of Expansion, 68 – 212°F, 10^-6 in/in • °F.....0.83
20 – 100°C, µm/m • °C ............1.5
68 – 392°F, 10^-6 in/in • °F........1.4
20 – 200°C, µm/m • °C ............2.6
Electrical Resistivity, ohm • circ mil/ft ...............................480
µ Ω• m ..............................................0.800

TYPICAL MECHANICAL PROPERTIES

(Annealed)
Tensile Strength, ksi ..................................................................71
MPa ............................................................490
Yield Strength (0.2% Offset), ksi ...........................................35
MPa .....................................240
Elongation, % ..............................................................................42

NILO 42

无