ULTIMET Welding Electrodes

Metals And Welding Specialities is a trusted supplier of ULTIMET Welding Electrodes, designed for exceptional corrosion and wear resistance in the most demanding industrial environments. These electrodes are composed of a cobalt-based alloy that combines the superior toughness of cobalt with the high strength and corrosion resistance of chromium, molybdenum, and tungsten. The ULTIMET alloy delivers a unique balance of mechanical durability and metallurgical stability, making it ideal for applications where extreme heat, oxidation, and chemical attack are constant threats.

The ULTIMET Coated Electrode is classified under UNS R31233 and conforms to ASTM F90 / AMS 5877 standards. It is widely recognized under the Universal Standard name ULTIMET. These electrodes are engineered to provide excellent arc stability and slag detachability, ensuring smooth weld deposits with minimal spatter. The weld metal produced exhibits superior hardness and resistance to both galling and cavitation. This makes it a preferred choice for maintenance, repair, and overlay applications in industries such as chemical processing, pulp and paper, marine engineering, aerospace, and power generation.

The microstructure of the ULTIMET alloy consists primarily of a solid-solution matrix strengthened by chromium and molybdenum carbides. This metallurgical structure contributes to its outstanding resistance against pitting and crevice corrosion in chloride-rich environments. Moreover, the weld metal retains its mechanical properties even after long-term exposure to high temperatures, ensuring longevity and reliability in service. Metals And Welding Specialities’ ULTIMET welding electrodes are suitable for both manual metal arc welding and automatic overlay operations, allowing flexibility across various production setups.

When used properly, these electrodes yield weld overlays that demonstrate excellent bonding with base materials such as stainless steels, nickel alloys, and other corrosion-resistant metals. The deposit typically exhibits a hardness range of 30–35 HRC, depending on dilution and heat input, which can be optimized further by post-weld heat treatment. With Metals And Welding Specialities’ stringent quality control and precise formulation, users can expect consistent electrode performance and uniform deposit quality in every batch.

These ULTIMET Welding Electrodes have proven themselves in applications like valve seats, pump sleeves, agitator blades, turbine components, and chemical reactor parts where surface integrity and resistance to mechanical wear are critical. They offer a cost-effective solution for extending component life while reducing maintenance downtime. For customers requiring dependable corrosion and wear protection under harsh conditions, Metals And Welding Specialities’ ULTIMET electrodes deliver long-term value, stable performance, and exceptional metallurgical quality.

In summary, Metals And Welding Specialities’ ULTIMET Welding Electrodes bring together advanced alloy design, robust corrosion resistance, and reliable weldability. Whether you’re building new acid-resistant systems or carrying out repair work, our electrodes provide a dependable welding consumable that handles harsh environments with confidence.

• Specification ULTIMET Welding Electrodes

  Classification	AWS
  Form	Welding Electrode, Welding Rods
  Type Of Current	Direct Current Electrode Positive (DCEP)
  Diameters	3/32”, 1/8”, 5/32”, 3/16” or 2.5mm, Ø 3.2mm, Ø 4.0mm, Ø 5.0mm
  Size	2.0mm ∞ 5.0mm
  AC/DC+	50-80, 80-110, 100-135, 140-180
  Welding Positions	All positions 5/32” & 3/16” recommended for use in flat & horizontal positions only (F, V, OH, H)
  ULTIMET Welding Electrodes Application & uses	Petroleum Chemical plant Power sector Gas Industry Hardware tools Metallurgy Machinery Construction Shipbuilding

• Equivalent Grade Of AWS ENiCrMo-4 Coated Electrodes

  Class	UNS
  ULTIMET®	R31233

• ULTIMET Welding Electrodes Chemical Composition

  Cobalt:	Balance
  Chromium:	23.50-27.50
  Nickel:	7.00-11.00
  Molybdenum:	4.00-6.00
  Iron:	1.00-5.00
  Tungsten:	1.00-3.00
  Manganese:	0.10-1.50
  Silicon:	0.05-1.00
  Other:	0.50 max.
  Nitrogen:	0.03-0.14
  Carbon:	0.02-0.10
  Phosphorus:	0.030 max.
  Sulfur:	0.020 max.

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