DAIKOWM 1006

GMAW
  • COBALT ALLOYS
Gr. 6

Description

Solid cobalt based wire rod
This wire rod provides resistance to many forms of chemical and mechanical degradation over a wide temperature range. It bonds well with all weldable grade steels, including stainless. Suitable for coatings resistant to wear combined with corrosion and oxidation up to 900 ° C. It is used to surface valves and valve seats, hot shear blades, cold and hot forming rolls, equipment for handling hot steel and for applications in a very wide range of industries including petrochemical, steel, cement, marine and power generation.
Specifications
AWS A5.21
ERCoCr-A
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

40HRC - 45HRC
Chem. Comp. %
DEFAULT
C
1.1
Mn
0.35
Ni
2.2
Cr
30
Si
1.3
Fe
2
W
8.6
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

This cobalt-based alloy is widely recognized as the most extensively used type, offering abrasion resistance, along with robust defenses against corrosion, erosion, and thermal shock. It excels in resisting galling, sliding friction, and compression across various temperatures. The alloy's distinctive features include a hypereutectic structure comprising roughly 13% eutectic chromium carbides distributed within a solid solution matrix of cobalt, chromium, and tungsten. It is extensively employed for surfacing valves, valve seats, hot shear blades, punches and dies, ingot tong ends, and equipment utilized in handling hot steel. Noteworthy applications include its use for cat cracker slide valves in the petrochemical industry, as well as across a broad spectrum of sectors such as steel, cement, marine, and power generation. Preheating within the range of 100-300°C, or even higher, along with slow cooling, may be necessary to mitigate the risk of cracking in multi-run deposits and/or highly restrained conditions. The deposits are machinable using carbide tools and can be refined through grinding as needed. Importantly, these alloys remain impervious to allotropic transformation, ensuring that their properties endure even after subsequent heat treatment of the base metal.

Alloy Type

Cobalt based alloy composed of 27%-32% Chrome, 4%-6% Tungsten, 1%-2% Carbon, 3%-4% Nickel, 1%-2% Silicon and 3%-4% Iron.

Microstructure

In the as-welded condition the microstructure consists of a cobalt based austenite with a number of carbides and other complex phases.

Materials

Used for surfacing mild, low alloy and stainless steels, and also for nickel base alloys. Can also be used for the repair of UNS R30006, Stellite 6 (Deloro Stellite).

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