DAIKOSTRIP C276

ESW, SAW
  • NICKEL ALLOYS
C276

Description

It is a welding strip designed to deposit alloy C276 in combination with DAIKOSTRIP 59
• It is employed primarily for chemical processes with highly corrosive media, but also for surfacing press tools, punches, etc. which operate at high temperatures. In addition to its exceptional resistance to contaminated mineral acids, chlorine-contaminated media, and chloride containing media, it resists strong oxidisers such as ferric and cupric chlorides and is one of the few materials which will resist wet chlorine gas. Weld with possibly low heat input and low interpass temperature in order to avoid intermetallic precipitations.
Specifications
AWS A5.14
EQNiCrMo-4
Shielding
DAIKOFLUX 940, 942AS, 944
Positions
PA
Current
DC+
Packaging Type
Coils Standard 30x05mm 60x05mm 90x05mm Weight 25 300kg width and specific weights available on request
Asme qualifications
F-No (QW432)
43
A-No (QW442)
-

Pren

73.15
Chem. Comp. %
0
C
0.002
Mn
0.5
Ni
58
Cr
15.4
V
0.15
P
0.02
S
0.01
Mo
15.6
Si
0.02
Cu
0.1
Fe
5.5
W
3.8
Co
1.2
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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