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

Grade 6 is the most common type of cobalt-based alloy, appreciated for its exceptional balance of resistance to abrasion, corrosion, erosion, and thermal shock. This alloy offers excellent resistance to adhesive wear, galling, and compression, maintaining its properties at all operating temperatures. Its structure is hypereutectic, characterized by a network of about 13% eutectic chromium carbide, finely distributed within a solid solution matrix of cobalt-chrome-tungsten. Gr. 6 is widely used for coating valve faces and seats, hot-cutting blades, punches, and dies. It is ideal for ingot tong ends and hot steel-handling equipment. In the
petrochemical industry, it is applied on gate valves for catalytic crackers. It is also used in many other sectors, including steelworks, cement plants, maritime industry, and power generation. Preheating in the range of 100-300 °C may be required, followed by slow cooling to minimize the risk of cracking, especially with multilayer deposits or under high mechanical restraint conditions. The deposits created are machinable with carbide tools and can be finely finished by grinding. These alloys do not undergo allotropic transformations, preserving their properties even after possible heat treatments on 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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