825
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).
Products of the line 825
| Product name | Process | AWS specifications | EN ISO specifications | |
| DAIKO 135 | SMAW |
AWS A5.4
(E383-16) |
EN ISO 14172
E Ni 8025 |
|
| DAIKOSTRIP 825 | ESW SAW |
AWS A5.14
EQNiFeCr-1 |
- | |
| DAIKOWM 825 | GMAW |
AWS A5.14
ERNiFeCr-1 |
EN ISO 18274
S Ni 8065 |
|
| DAIKOWT 825 | GTAW |
AWS A5.14
ERNiFeCr-1 |
EN ISO 18274
S Ni 8065 |
