DAIKOWT 36 INV

GTAW
  • NICKEL ALLOYS
INVAR

Description

Rod for low thermal expansion alloys
Rod developed to ensure very low thermal expansion, ideal for preventing solidification or reheating cracks. The Ni-Fe alloy containing 36% Ni maintains almost constant dimensions from cryogenic environment to about 260 °C and ensures good resistance and toughness at low temperatures. Used for tanks and piping intended for the storage and transport of liquefied gases.
Specifications
Shielding
I1
Positions
PA, PB, PC, PD, PE, PF
Current
DC-
Packaging Type
5kg carton tube
Chem. Comp. %
0
C
0.008
Mn
0.30
Ni
36
Cr
0.07
P
0.004
S
0.004
Si
0.12
Fe
63
Mg
0.02
Mechanical Properties
min
variant
Tensile strength Rm MPa
-
450
Yield strength Rp0.2 MPa
-
290
Elongation A (L0=5d0) %
-
42
Impact Charpy ISO-V
-
-
Impact Charpy ISO-V
-
-
Welding Parameters
1.6 mm
2.4 mm
Ampere
80A - 120A
130A - 160A
Voltage
10V - 13V
14V - 18V
Packaging
Ø 1,0÷4,0mm
Ø 1,0÷4,0mm
Packaging Type
product.packaging_types.product.packaging_types.product.packaging_types.Tubo di cartone 5kg
product.packaging_types.product.packaging_types.product.packaging_types.Tubo di cartone 5kg
Description

Application

INVAR alloy is renowned for its low thermal expansion and consists of a specific mixture of nickel-iron containing 36% nickel. This characteristic makes it almost invariant in size within the range of normal atmospheric temperatures. It exhibits a particularly low coefficient of expansion from cryogenic temperatures up to about 260 °C. INVAR maintains excellent strength and toughness even when exposed to cryogenic conditions. It finds ideal application in tanks and pipes intended for the storage and transport of liquefied gases. This consumable material is expertly designed to exhibit extremely reduced thermal expansion, effectively preventing solidification and reheat cracking.

Alloy Type

Iron-based alloy with 36% nickel.

Microstructure

Fe-Ni-based binary alloy, mainly composed of face-centered cubic (fcc) austenite.

Materials

FeNi36 and similar low thermal expansion alloys.
  • EN W.Nr.: 1.3912 (Ni 36 X 10 Ni 36)
  • UNS: K93600, K93601
  • PROPRIETARY: Nilo® 36 (Special Metals), Invar® 36 (Aperam)

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