DAIKOWS 276

SAW
  • NICKEL ALLOYS
C276

Description

Solid wire for Nickel based alloy C276
Wire rod formulated to match the composition and properties of alloy C276. It is also used for surfacing of steel. The weld metal has high resistance in a wide range of media and exceptional resistant to pitting and crevice corrosion. Applications include pumps, valves, pipework and vessels in chemical process plant, equipment for flue gas desulphurisation and for offshore in oil & gas field. Useful properties from -269°C to above 1000°C are achieved.
Specifications
EN ISO 18274
S Ni 6276
AWS A5.14
ERNiCrMo-4
Shielding
DAIKOFLUX 960-W
Positions
PA, PB, PC
Current
DC/AC
Packaging Type
K415 spool and drums.
Asme qualifications
F-No (QW432)
43
A-No (QW442)
-

Pren

74.51
Chem. Comp. %
DEFAULT
C
0.01
Mn
0.2
Ni
59
Cr
16.1
Nb
3.7
V
0.05
P
0.008
S
0.002
Mo
16
Si
0.2
Cu
0.01
Fe
5.2
W
3.4
Mechanical Properties
min
variant
Tensile strength Rm MPa
690*
720
Yield strength Rp0.2 MPa
0
450
Elongation A (L0=5d0) %
0
45
Impact Charpy ISO-V
-
60J @ -196°C
Impact Charpy ISO-V
-
-
Welding Parameters
2.4 mm
Ampere
300A - 410A
Voltage
27V - 33V
Packaging
Ø 1,6÷3,2mm
Packaging Type
K415 spool and drums.
Description

Application

The weld deposit perfectly matches the C276 base alloy, composed of Ni-15%Cr-16%Mo-4%W-5%Fe. The carbon (C) and silicon (Si) content is carefully controlled to minimize the formation of carbide precipitates and intermetallic phases. Cast alloy variants generally present higher levels of carbon and silicon, but repair welds are typically heat-treated for solutionizing to ensure optimal corrosion resistance. The C276 alloy offers excellent corrosion resistance in a wide range of acids and salts, under both oxidizing and reducing conditions. These include hydrochloric acid, hydrofluoric acid, hypochlorites, chlorides, wet chlorine gas, sulfuric acid, phosphoric acid, and numerous organic acids. It demonstrates exceptional pitting and crevice corrosion resistance in saltwater and shows high resistance to chloride-induced stress corrosion cracking, superior to alloy 62. Its excellent mechanical properties at temperatures down to -196 °C make it ideal for welding cryogenic plants with a Ni content between 5-9%. Typical applications include use in
pumps, valves, piping, and vessels for aggressive environments in chemical processing plants, as well as in flue gas desulfurization equipment and the offshore oil and gas sector. No preheat is necessary; the interpass temperature should preferably be maintained below 100 °C, and the heat input must be limited to 1.5 kJ/mm.

Alloy Type

Alloy C276 is a Ni-15%Cr-16%Mo-4%W-5%Fe nickel base alloy.

Microstructure

In the as-welded condition the weld metal consists of austenite with some carbides.

Materials

  • EN W.Nr.: 2.4819 (NiMo16Cr15W), 2.4883 (G-NiMo16Cr)
  • ASTM: A494 CW-12MW, A743/A744 CW-12M
  • UNS: N10276
  • PROPRIETARY: Hastelloy® Alloy C-276 (Haynes International Inc), Inconel® Alloy C-276 (Special Metals), Nicrofer 5716hMoW (VDM)

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