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Ultimet® Welding Wire – Composition, Properties, and Uses

Ultimet® Welding Wire

When it comes to welding wire, Ultimet® is a name that commands attention and respect. This innovative and advanced welding wire is engineered to offer unparalleled performance, impressive versatility, and exceptional durability in a wide range of demanding industrial applications. But what exactly is Ultimet® welding wire, and what sets it apart from other wires in the market? In this blog post, we delve deeper into the composition, properties, and applications of Ultimet® welding wire to help you better understand why it’s a game-changer in the welding industry.

What is Ultimet® Welding Wire?

ULTRIMET® Welding Wire is an advanced technology wire that provides superior weld quality and performance. It features a unique combination of extra-low carbon content, low hydrogen levels, high ductility, and superior corrosion resistance compared to conventional mild steel wires. This makes ULTIMET® the ideal choice for welding applications requiring strength, toughness or high-temperature resistance in harsh environments. Additionally, it provides greater arc stability with less spatter and improved bead shape due to its higher deposition rates at lower amperages than ordinary mild steel wires.

Ultimet® Coated Wire Composition

Ultimet® alloy is a high-performance nickel-based alloy that contains a precise blend of numerous metals, including cobalt, chromium, nickel, tungsten, and molybdenum. This alloy composition offers superior strength, unmatched toughness, and excellent resistance to corrosion, high-temperature oxidation, and thermal fatigue. With its high nickel and cobalt content, Ultimet® welding wire boasts outstanding flexibility and workability, making it ideal for welding dissimilar metals, exotic alloys, and challenging materials.

Cobalt: Balance
Chromium: 23.5-27.5
Nickel: 7.0-11.0
Molybdenum: 4.0-6.0
Iron: 1.0-5.0
Tungsten: 1.0-3.0
Manganese: 0.10-1.5
Silicon: 0.05-1.0
Nitrogen: 0.03-0.12
Carbon: 0.02-0.10
Phosphorus: 0.030 max.
Sulfur: 0.020 max.
Boron: 0.015 max.

Ultimet® Welding Wire Mechanical Properties

Ultimet® electrode also boasts impressive mechanical properties that set it apart from other welding wires in the market. This welding wire can handle extreme temperatures, withstanding temperatures of up to 1093°C (2000°F) without mechanical deformation or damage. Its tensile strength is also impressive: Ultimet® can hold up to 1180 MPa (171,000 psi), making it a popular choice for high-stress applications. Additionally, Ultimet® welding wire offers excellent elongation and fatigue strength properties, making it a reliable and durable welding solution.

Tensile (psi) 133,000
Mpa 917
Elongation (%) 10

Ultimet® Coated Wire Physical Properties

The physical properties of Ultimet® welding electrode are equally impressive. Its density is 9.20 g/cm3 (0.333 lb/in3), making it relatively lightweight for its strength. It also has a low coefficient of thermal expansion, which minimizes the risk of thermal distortion during welds. Ultimet® welding wire also boasts exceptional magnetic properties, making it ideal for welding parts and products that require magnetic responses, such as transformers and electric motors.

ULTIMET® Welding Wire Trade Names

Class UNS
R31233 ULTIMET® Wire

Ultimet® Coated Wire Uses

Ultimet® filler metal finds numerous applications across diverse industrial sectors. Its excellent corrosion resistance makes it ideal for marine, chemical, and petrochemical applications, where exposure to harsh and corrosive environments is common. Its heat-resistant properties make it suitable for welding parts and components facing high temperatures, such as gas turbines, jet engines, and heat exchangers. Ultimet® welding wire is also a popular choice for the aerospace, medical, and nuclear industries, where this alloy’s exceptional strength, toughness, and workability play essential roles in ensuring product reliability.

Ultimet® Welding Wire Corrosion Resistance

Since Ultimet® filler wire contains high levels of nickel, chromium, and molybdenum, it offers outstanding resistance to pitting, crevice, and general corrosion. Ultimet®’s unique combination of metals and alloys provides excellent protection from chemical attack by oxidizing and reducing acids, making it ideal for applications where corrosion resistance is critical.

Ultimet® Coated Wire Heat Treatment

Ultimet® welding wire is also heat-treatable, allowing users to modify the mechanical and physical properties of the alloy to suit specific applications. Depending on the intended use, heat treatment processes such as tempering, annealing, and quenching can adjust the hardness, strength, ductility, and other properties of Ultimet® welding wire. Heat treatment can also improve the microstructure of Ultimet® welding wire, leading to increased toughness and resistance to fatigue, among other benefits.


In conclusion, Ultimet® welding wire is a powerful and versatile welding solution that offers impressive strength, durability, and corrosion resistance for various industrial applications. With its unique alloy composition and outstanding mechanical and physical properties, Ultimet® welding is a reliable, advanced, and effective welding wire for today’s demanding welding needs. Whether you need to weld challenging materials, exotic alloys, or parts and products that require exceptional corrosion resistance, Ultimet® welding wire is an unbeatable choice you can always count on for quality, performance, and reliability.

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