DAIKOWT 276

GTAW
  • NICKEL ALLOYS
C276

Description

Solid rod 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
ISO 18274
S Ni 6276
AWS A5.14
ERNiCrMo-4
Shielding
I1
Positions
PA, PB, PC, PD, PE, PF
Current
DC-
Packaging Type
5kg carton tube
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
500
Elongation A (L0=5d0) %
0
43
Impact Charpy ISO-V
-
100J @ -196°C
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
5kg carton tube
5kg carton tube
Description

Application

The deposited weld replicates the composition of parent alloy C276, comprising Ni-15%Cr-16%Mo-4%W-5%Fe. Precise control over C and Si levels is implemented to minimize carbide and intermetallic phase precipitates. While cast versions may have higher carbon and silicon content, repair welds typically undergo solution treatment for optimum corrosion resistance. Alloy C276 exhibits high resistance to corrosion in a broad range of acids and salts under oxidizing and reducing conditions, including hydrochloric and hydrofluoric acids, hypochlorites, chlorides, wet chlorine gas, sulphuric, phosphoric, and various organic acids. Noteworthy is its exceptional resistance to crevice corrosion, pitting in seawater (surpassing alloy 62), and chloride-induced stress corrosion cracking. With excellent properties extending to below -196°C, Alloy C276 finds applications in welding 5-9%Ni cryogenic installations. Its versatile use includes pumps, valves, pipework, and vessels in aggressive chemical plant environments, as well as equipment for flue gas desulphurization and critical offshore oil and gas production equipment. Importantly, preheating is unnecessary, and it is advisable to keep the interpass temperature below 100°C, with a restricted heat input 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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