DAIKOWM 1010

GMAW
  • COBALT ALLOYS
Gr. 1

Description

Solid cobalt based wire rod
Grade 1 wire rod has the highest hardness of the cobalt alloys and is used to elevate temperature wear applications. Machine with carbide tools or grinding. It bonds well with stainless and other weldable grades of steel.
Specifications
AWS A5.21
ECoCr-C
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

52HRC - 54HRC
Chem. Comp. %
DEFAULT
C
2.2
Mn
0.3
Ni
2.2
Cr
29
Si
0.8
Fe
2.2
W
12
Mechanical Properties
min
variant
Tensile strength Rm MPa
-
240
Yield strength Rp0.2 MPa
0
170
Elongation A (L0=5d0) %
0
24
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
Corrosion
Heat
Description

Application

The high percentage of carbides gives the alloy higher wear resistance accompanied by reductions in the impact and corrosion resistance. The higher hardness also means a greater tendency to check during cooling. The checking tendency may be minimized by closely monitoring preheating, interpass temperature, and postheating techniques. While the cobalt-chromium deposits soften somewhat at elevated temperatures, they normally are considered immune to tempering. Weld metal deposited by ERCoCr-C electrodes and rods is used to build-up items such as mixers, rotors, or wherever harsh abrasion and low impact are encountered. Suitable also for applications such as pump sleeves, rotary seal rings, wear pads, expeller screws and bearing sleeves. The addition of tungsten enhances high temperature hardness and matrix toughness for excellent adhesive and solid particle erosion wear resistance. It retains its hardness, 43–58 HRC, at temperatures up to 760°C. Preheat at 300°C and over in general.

Alloy Type

Cobalt alloy for hardfacing with excellent corrosion and abrasion resistance with low impact.

Microstructure

Primary hypereutectic carbides (approximately 19%) are found in in an austenitic type matrix.

Materials

It bonds well with all steels including stainless.

Welding & PWHT

Ensure thorough cleaning of both the joint surface and its adjacent area prior to welding, diligently removing any contaminants such as grease, oil, crayon marks, sulfur compounds, and other foreign matter. Exercise caution to avoid any contact between the joint area and copper or copper-bearing materials. While it is preferable, albeit not mandatory, for the alloy to be in a solution-annealed condition during welding, preheating is typically deemed unnecessary as long as the base metal temperature remains above 0°C. Throughout the welding process, maintain consistently low interpass temperatures for optimal results. For further enhancement, it is advisable to implement postheating at 600°C and facilitate a slow cooling process after welding to effectively prevent the occurrence of cracking.

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