Cobalt Alloys Welding Consumables

Cobalt-based welding consumables are widely recognized for their exceptional wear resistance, corrosion resistance, and high-temperature performance. Known under brand names such as Stellite®, Ultimet®, and other cobalt alloys, these consumables are extensively used in industries where severe wear, metal-to-metal contact, erosion, and high heat conditions are present.

Our range of Cobalt Welding Electrodes, TIG Rods, MIG Wires, and PTA/SAW Powders covers a wide selection of grades, including Stellite 1, Stellite 6, Stellite 12, Stellite 21, and more, with compliance to AWS, EN ISO, and DIN standards.

Key Advantages of Cobalt Welding Consumables

• Excellent wear resistance – ideal for abrasion, erosion, and galling conditions.
• High corrosion resistance – performs exceptionally in acidic, alkaline, and salt environments.
• Temperature stability – maintains hardness and strength up to 600–900°C.
• Metal-to-metal resistance – prevents seizure, galling, and adhesive wear.
• Versatility – available in SMAW (Electrodes), GTAW (TIG), GMAW (MIG), PTA, Oxy-Acetylene, and Thermal Spray.

Comparison Table – Cobalt Alloys & Specifications

Grade / Trade Name	AWS Specification	EN ISO / DIN Equivalent	Hardness (HRC)	Key Applications
Stellite® 1	ERCoCr-C / ECoCr-C	EN ISO 24373: S Co2 CoCr-C / DIN L CoCr 1	50–60	Severe abrasion, cutting tools, turbine parts, valve seats
Stellite® 6	ERCoCr-A / ECoCr-A	EN ISO 24373: S Co2 CoCr-A / DIN L CoCr 6	38–45	Pump sleeves, turbine blades, oil & gas valves, earth-moving
Stellite® 12	ERCoCr-B / ECoCr-B	EN ISO 24373: S Co2 CoCr-B / DIN L CoCr 12	40–48	Gate valves, extrusion dies, steam turbines, drilling tools
Stellite® 21	ERCoCr-E / ECoCr-E	EN ISO 24373: S Co2 CoCr-E / DIN L CoCr 21	25–35	Aerospace valves, pumps, marine & chemical equipment
Stellite® 20 / 31 / Special Grades	ERCoCr-D / F / G / W	EN ISO equivalents available	Varies	Seawater, nuclear, jet engines, chemical resistance applications

Popular Cobalt Welding Alloys – Details

Stellite® 6 (ERCoCr-A / ECoCr-A)

• Standards: AWS A5.21 ERCoCr-A, AWS A5.13 ECoCr-A, EN ISO 24373 S Co2 CoCr-A, DIN L CoCr 6
• Properties: Excellent all-rounder for wear and corrosion resistance.
• Applications: Valve seats, pump sleeves, turbine blades, oil & gas components.

Stellite® 12 (ERCoCr-B / ECoCr-B)

• Standards: AWS A5.21 ERCoCr-B, AWS A5.13 ECoCr-B, EN ISO 24373 S Co2 CoCr-B, DIN L CoCr 12
• Properties: Higher hardness than Stellite 6; superior erosion resistance.
• Applications: Gate valves, extrusion dies, steam turbine parts, drilling tools.

Stellite® 21 (ERCoCr-E / ECoCr-E)

• Standards: AWS A5.21 ERCoCr-E, AWS A5.13 ECoCr-E, EN ISO 24373 S Co2 CoCr-E, DIN L CoCr 21
• Properties: High toughness, cavitation resistance, corrosion protection.
• Applications: Aerospace valves, pumps, chemical and marine components.

Stellite® 1 (ERCoCr-C / ECoCr-C)

• Standards: AWS A5.21 ERCoCr-C, AWS A5.13 ECoCr-C, EN ISO 24373 S Co2 CoCr-C, DIN L CoCr 1
• Properties: Highest hardness, extreme abrasion resistance.
• Applications: Cutting blades, turbine parts, sealing surfaces.

Other Cobalt Alloys (Stellite® 20, 31, Ultimet® etc.)

• AWS: ERCoCr-D, ERCoCr-F, ERCoCr-G, ERCoCr-W
• Applications: Specialized chemical resistance, seawater protection, nuclear service, aerospace high-temp components.

Forms of Supply

• Welding Electrodes (SMAW)
• TIG Welding Rods (GTAW)
• MIG Welding Wires (GMAW)
• Plasma Transferred Arc (PTA) Powders
• Oxy-Acetylene Rods
• Thermal Spray Powders

Applications Across Industries

• Oil & Gas: valves, pump sleeves, drilling tools
• Aerospace: turbine blades, jet engine components
• Power Generation: steam & gas turbine parts
• Chemical & Petrochemical: reactors, pump impellers, mixers
• Mining & Earth-Moving: cutting edges, wear plates, drilling equipment
• Marine & Nuclear: valve seats, corrosion-exposed components

Why Choose Cobalt Alloys?

• Longer component life reduces downtime and maintenance costs
• Excellent hot hardness for extreme service conditions
• Resistant to galling even without lubrication
• Proven track record in aerospace, oil & gas, and power plants worldwide

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