Hot Sale AWS A5.21 Cobalt-based Surfacing Welding Rod ERCoCr-A Stellite 6 TIG 2.7mm 3.2mm

Product Information

ERCoCr-A is a cobalt-chromium alloy welding electrode designed for use in shielded metal arc welding (SMAW) and other welding processes. It is specifically formulated for wear-resistant applications and provides superior protection against abrasion, erosion, and high-temperature wear. This alloy is typically used for applications requiring exceptional strength and hardness, even in extreme environments. The wire is mainly used in industries such as mining, aerospace, and power generation, where high wear resistance and strong weld integrity are critical.

Other Names:

• Cobalt-Chromium Electrode

• AWS A5.13 ERCoCr-A

• UNS W32114 Electrode

Material Composition:

• Cobalt (Co): 55-65%

• Chromium (Cr): 27-32%

• Iron (Fe): 2-10%

• Carbon (C): ≤ 0.1%

• Manganese (Mn): ≤ 1%

Appearance / Color:

• Solid silver-gray color, with a uniform, smooth surface.

Core Wire Diameter:

• Available in 2.5 mm, 3.2 mm, 4.0 mm, and 5.0 mm. Custom sizes can be available on request.

Packaging:

• Typically available in 5 kg sealed boxes or 25 kg drums.

Characteristics

• Wear Resistance: ERCoCr-A provides outstanding resistance to both abrasion and erosion, making it ideal for environments where parts are subjected to heavy wear, such as in pumps, valves, crusher parts, and gears.

• High-Temperature Resistance: The alloy excels at high-temperature hardness, maintaining its strength and wear properties in applications where temperatures exceed 500°C (932°F).

• Corrosion Resistance: ERCoCr-A offers excellent corrosion resistance in a variety of corrosive environments, such as those found in mining, chemical processing, and marine applications.

• Toughness and Hardness: The alloy provides a balance of high hardness and toughness, offering protection against impact and high-stress conditions.

Technology

The ERCoCr-A electrode is designed for Shielded Metal Arc Welding (SMAW), a process that produces high-quality welds by melting the electrode and the base material using a direct current (DC) or alternating current (AC) power supply. The unique formulation of ERCoCr-A ensures that it offers consistent arc stability and a high-quality finish. It is especially effective in creating wear-resistant coatings on mild steel, cast iron, and carbon steel.

Welding Process:

• Shielded Metal Arc Welding (SMAW): The wire works well with SMAW, providing strong, durable welds in applications requiring high wear resistance.

• Electrode Composition: The high cobalt and chromium content ensure that the weld deposit exhibits exceptional hardness and strength under extreme wear conditions.

Theory

The ERCoCr-A electrode works by creating a strong metallurgical bond between the welding material and base material. The cobalt-chromium alloy forms a hard, wear-resistant layer over the base material, significantly improving its resistance to abrasion, erosion, and thermal wear. The chromium content helps to form an oxide layer that provides further protection against corrosion at high temperatures, while the cobalt provides toughness and strength to resist the stresses caused by heavy wear.

Application / Usage

ERCoCr-A is primarily used in industries where high abrasion resistance, high-temperature wear resistance, and corrosion resistance are required. Some of the common applications include:

1. Mining Industry:

• Crusher parts, chutes, and grinders that experience extreme abrasion and wear.

2. Power Generation:

• Ideal for coal mills, boiler tubes, and valve seats that need to withstand erosion and high-temperature wear.

3. Aerospace and Defense:

• Turbine blades, compressor blades, and other components exposed to high stress and wear conditions.

4. Chemical Processing:

• Welds in reactors, vessels, and pumps that are exposed to both abrasion and corrosive chemicals.

5. Marine Industry:

• Suitable for marine equipment subjected to saltwater corrosion and abrasion, such as propellers, sea valves, and marine pipelines.

6. Food Processing:

• Coatings for processing equipment exposed to abrasion and high temperatures in environments where hygiene is critical.

Advantages / Selling Points

• Exceptional Wear Resistance: ERCoCr-A offers superior resistance to abrasion and erosion, making it the best choice for high-wear environments.

• High-Temperature Performance: This electrode maintains its mechanical properties even in high-temperature applications above 500°C (932°F).

• Corrosion Resistance: Provides excellent resistance to corrosion and oxidation, ensuring longevity in marine and chemical processing environments.

• Toughness and Hardness: Combines hardness with toughness to resist impact and stresses in mining and aerospace applications.

• Versatile Application: Suitable for welding a wide range of materials including mild steel, carbon steel, cast iron, and other nickel-based alloys.

Parameters Table / Selection Table

Parameter	Details
Material Composition	Cobalt-Chromium Alloy
Electrode Diameter	2.5 mm, 3.2 mm, 4.0 mm, 5.0 mm
Shielding Gas	Not required (Self-shielded process)
Packaging	5 kg spools, 25 kg drums
Tensile Strength	85,000 psi (minimum)
Melting Point	~1,300°C (2,372°F)

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