DAIKO 112

SMAW
  • NICKEL ALLOYS
625

Description

Basic coated electrode for nickel based 625 alloy
It is designed to match the composition and properties of 625 and used for welding of alloy 625, 825, 25-6MO, 9% Ni steels and a range of super austenitic stainless steels. This alloy is used for the high temperature strength and structural stability and is also used for its resistance to general corrosion, pitting, crevice and stress corrosion cracking in severe chloride media. Useful proprieties from -269°C to above 550°C are achieved. Used in petrochemical and power generation plants and also for overlays on pumps, valves and shafts in offshore and marine environments.
Specifications
ISO 14172
E Ni 6625
AWS A5.11
ENiCrMo-3
Shielding
-
Positions
PA, PB, PC, PD, PE, PF
Current
DC+
Packaging Type
Carton box and tube.
Asme qualifications
F-No (QW432)
43
A-No (QW442)
-

Pren

52.19
Chem. Comp. %
DEFAULT
C
0.02
Mn
0.01
Ni
65
Cr
21.5
Nb
3.6
P
0.01
S
0.006
Mo
9.3
Si
0.4
Cu
0.005
Fe
0.5
Mechanical Properties
min
variant
Tensile strength Rm MPa
760
790
Yield strength Rp0.2 MPa
420
430
Elongation A (L0=5d0) %
22
30
Impact Charpy ISO-V
-
30J @ -196°C
Impact Charpy ISO-V
-
-
Welding Parameters
2.5 mm
3.2 mm
4 mm
4.8 mm
Ampere
40A - 65A
70A - 100A
90A - 130A
120A - 160A
Voltage
-
-
-
-
Packaging
60 pcs/kg
29 pcs/kg
19 pcs/kg
13 pcs/kg
Packaging Type
Carton box and tube.
Carton box and tube.
Carton box and tube.
Carton box and tube.
625
Description

Application

Engineered to replicate the composition of alloy 625, this consumable is widely recognized for its exceptional resistance to general corrosion, pitting, crevice, and stress corrosion cracking, especially in challenging chloride environments. Elevated levels of Cr, Mo, and Nb contribute to its remarkable performance, endowing it with unparalleled strength that surpasses standard nickel-base alloys. With a broad operational range spanning from –269°C to above 1000°C, it is well-suited for welding heat-resistant alloys like Inconel 601, Incoloy 800/800H, or their combinations with other alloys, catering to various applications in furnace equipment, petrochemical plants, and power generation facilities. This consumable is versatile for performing overmatching corrosion-resistant welds in alloy 825, Hastelloys G and G3, alloy 28, 904L, and the 6%Mo superaustenitic stainless steel 254SMo.Additionally, it is employed for overlays on pumps, valves, and shafts, particularly in demanding offshore and marine environments where high pitting resistance (PRE = 50) and tolerance to dilution are imperative. In welding high-strength ferrous alloys, including cryogenic 9% nickel steels, and for the reclamation of dies demanding rapid work-hardening and toughness, this consumable stands as a preferred choice. Notably, no preheat is required, and the maximum interpass temperature is set at 250°C. For superaustenitic alloys, the interpass temperature should be rigorously controlled, not exceeding 100°C.

Alloy Type

Consumables matching the nickel base 625 alloy with typical composition of Ni-21%Cr-9%Mo-3.5%Nb.

Microstructure

In the as-welded condition this nickel base weld metal consists of solid-solution strengthened austenite with carbides.

Materials

Also suitable to join 9%Ni steels.
EN W.Nr.: 2.4856.
ASTM: A494 CW-6MC , 904L.
UNS: N06625, S31254.
PROPRIETARY: Inconel® 625, 601 (Special Metals), Nicrofer 6020hMo, 6022hMo (VDM), 254SMO (Outokumpu), Incoloy® 800H, 825 (Special Metals).

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