Name: Cobalt Alloy 21 ECoCr-E 4.0mm x 350mm 5kg
SKU: WE/ECoCr-E/40/5
Availability: InStock

Description

Our Cobalt Alloy 21 ECoCr‑E welding electrodes offer exceptional performance for hardfacing and high-temperature applications. These 4.0 mm × 350 mm rods come in a 5 kg pack and are ideal for industrial environments where durability and heat resistance are essential.

This electrode conforms to AWS A5.13 / SFA 5.13 (ECoCr‑E) specifications. It produces a low-carbon cobalt-chromium alloy containing 27–30 % chromium, 4–6 % molybdenum, and approximately 0.3 % carbon. The result is a deposit that resists corrosion, abrasion, impact, and thermal fatigue.

Moreover, it performs reliably at temperatures up to 870 °C (1600 °F). Therefore, it is well-suited for applications like steam valves, turbine blades, hot-shear blades, forging dies, and extrusion tooling.

In addition, the electrode offers excellent weldability on carbon and stainless steel. It features a self-releasing slag, smooth bead appearance, and consistent arc stability. After hardening, the deposit reaches a hardness range of HRC 30–45.

You can weld using either AC or DC+ polarity. For 3.2 mm rods, use a current of 95–110 A. Minimal preheat is required, which makes it more efficient to use in field repairs or workshops.

If you need help with settings, refer to our welding parameters page. It includes tips and best practices for optimal performance.

We stock only high-grade electrodes at Fourie Welding & Tool, ensuring your work meets industrial standards. For more background on cobalt alloy properties, visit the American Welding Society — the global leader in welding expertise.

Whether you’re restoring high-wear parts or building new tools, choose Cobalt Alloy 21 for long-lasting results and superior metallurgical stability.

Additional information

Size & Type	RHINO E308L X 2.5MM, RHINO E308L X 3.2MM, RHINO E308L X 4.0MM, RHINO E309L X 2.5MM, RHINO E309L X 3.2MM, RHINO E309L X 4.0MM, RHINO E310 X 2.5MM, RHINO E310 X 3.2MM, RHINO E310 X 4.0MM, RHINO E312 X 2.5MM, RHINO E312 X 3.2MM, RHINO E312 X 4.0MM, RHINO E316L X 2.5MM, RHINO E316L X 3.2MM, RHINO E316L X 4.0MM