DAIKOWT 825

GTAW
  • NICKEL ALLOYS
825

Description

Solid rod for Cr-Ni-Mo-Cu alloy 825 type
This wire rod is used for welding alloy 825 and other nickel-iron-chromium-molybdenum-copper alloys of similar composition. The weld metal is highly corrosion resistant, particularly in reducing chemicals such as sulphuric and phosphoric acids. It is also suitable for depositing overlays on carbon and low alloys steels. Applications include pressure vessel, piping, heat exchanger, valves and other components for chemical processing, offshore and oil and gas industries.
Specifications
ISO 18274
S Ni 8065
AWS A5.14
ERNiFeCr-1
Shielding
I1
Positions
PA, PB, PC, PD, PE, PF
Current
DC-
Packaging Type
5kg carton tube
Asme qualifications
F-No (QW432)
45
A-No (QW442)
-

Pren

33.59
Chem. Comp. %
DEFAULT
C
0.01
Mn
0.7
Ni
45
Cr
22.7
Al
0.07
P
0.005
S
0.001
Mo
3.3
Si
0.1
Cu
2.6
Fe
25
Ti
0.8
Mechanical Properties
min
variant
Tensile strength Rm MPa
550*
560
Yield strength Rp0.2 MPa
0
350
Elongation A (L0=5d0) %
0
25
Impact Charpy ISO-V
-
70J @ 20°C
Impact Charpy ISO-V
-
47J @ -196°C
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
825
Description

Application

The consumables effectively deposit Cr-Ni-Mo-Cu weld metal, showcasing a robust corrosion resistance to organic acids and hot sulfuric acid. The substantial nickel content enhances resilience against stress corrosion cracking in chloride and H2S environments. These consumables find versatile applications across tanks, process vessels, pipework systems, heat exchangers, agitators, rotors, as well as cast pumps and valves. Primarily utilized in the chemical processing industry and increasingly in offshore oil and gas sectors, they are also well-suited for corrosion-resistant overlays and welding dissimilar materials. Operational guidelines mandate no preheating, while the interpass temperature should be limited to a maximum of 150°C. Additionally, meticulous control of heat input is crucial, especially when using 4mm and 5mm diameter electrodes.

Alloy Type

Cr-Ni-Mo-Cu alloy of the generic 825 type.

Microstructure

In the as-welded condition the weld metal microstructure is fully austenitic.

Materials


EN W.Nr.: 2.4858 (NiCr21Mo), 1.4563 (X 1 NiCrMoCu 31 27 4).
ASTM: N08825, N08028.
PROPRIETARY: Incoloy® 825, 825CP cast (Special Metals), Nicrofer 4221 (VDM), Nicrofer 3127LC (VDM), Sanicro 28 (Sandvik).

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