DAIKOWM 1008

GMAW
  • COBALT ALLOYS
Gr. 12

Description

Solid cobalt based wire rod
Grade 12 wire rod develops high hardness, abrasion resistance and good corrosion resistance. These properties make this consumable the choice for cutting wood saws and bars and for industrial cutting applications for carpet, plastics, paper and chemical industries. It is non-forgeable and can be machined with difficulty using carbide tools. It bonds well to all weldable grade steels, including stainless.
Specifications
AWS A5.21
ERCoCr-B
Shielding
I1, M13
Positions
PA, PB, PC, PD, PE, PF, PG
Current
DC+
Packaging Type
Drums, B300, D200 and D100 spools.
Asme qualifications
F-No (QW432)
71
A-No (QW442)
-

Hardness

46HRC - 50HRC
Chem. Comp. %
DEFAULT
C
1.1
Ni
2.2
Cr
30
B
0.2
Si
1.3
Fe
2
W
8.6
Mechanical Properties
min
variant
Tensile strength Rm MPa
-
490
Yield strength Rp0.2 MPa
0
350
Elongation A (L0=5d0) %
0
25
Impact Charpy ISO-V
-
-
Impact Charpy ISO-V
-
-
Welding Parameters
1.2 mm
1.6 mm
Ampere
100A - 250A
140A - 350A
Voltage
16V - 29V
26V - 30V
Packaging
Ø 0,8÷1,6mm
Ø 0,8÷1,6mm
Packaging Type
Drums, B300, D200 and D100 spools.
Drums, B300, D200 and D100 spools.
Anti-wear Characteristics
Adhesive wear
Abrasive wear
Impact
Corrosion
Heat
Description

Application

These consumables exhibit an exceptional combination of characteristics, providing resistance to metal-to-metal wear, corrosion, erosion, and thermal shock. Specifically engineered for temperatures up to 800°C, they consist of chromium, nickel, and molybdenum alloys, collectively imparting excellent mechanical properties for enhanced corrosion and wear resistance. The resulting weld deposit demonstrates robust creep strength, making it well-suited for enduring high-temperature environments. With an optimal ferrite content in the joint, this filler material finds application in a range of scenarios, including heavy structural fabrications, oil rigs, boilers, pressure vessels, and cryogenic storage tanks. Notably, it surpasses similar fillers in terms of superior impact values at low temperatures. Widely utilized for surfacing valves and valve seats in the oil and gas industries, as well as for enhancing the durability of screw conveyors, augers in rubber and plastic industries, saw teeth in wood industries, and critical components like cams, shafts, tappets, and push rods in engines, among other applications.

Alloy Type

Similar in composition to deposits made using ERCoCr-A electrodes and rods except for a slightly higher percentage of carbides.

Microstructure

Chromium and tungsten carbides (approximately 16%) in an austenitic type matrix.

Materials

It is used to surface valves and valve seats for oil& gas industries, screw conveyors and augers for rubber and plastic, saw teeth for wood industries, cams, shafts, tappets and push rods for engines, etc.

Welding & PWHT

Prior to engaging in the welding process, it is imperative to meticulously cleanse the joint surface and its immediate vicinity. Complete removal of grease, oil, crayon marks, sulfur compounds, and any extraneous substances is paramount. Exercise caution to prevent contact between the joint area and copper or copper-bearing materials. Ideally, although not obligatory, the alloy should find itself in the solution-annealed state before initiating the welding procedure. The necessity for preheating arises only when the base metal temperature descends below 0°C. During welding, it is advisable to maintain relatively low interpass temperatures. This approach is designed to cultivate optimal conditions for a seamless welding operation.

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