Product Description:

A cobalt-based, solid wire, ULTIMET® wire is used to weld ULTIMET® wrought products, and more importantly, to overlay and clad carbon and low-alloy steels. The weld deposits harden very quickly by cold working. In addition, it is very easy to deposit a “crack-free” layer without a butter layer. The RTW filler metal finish on the MIG-spooled wire promotes smooth feeding through welding equipment and reduce tip wear in contact tips.

Key Features:

  • ULTIMET® wire easily produces crack-free weld deposits (over-matching weld overlays, weld inlays, and claddings).
  • It is easier to weld with ULTIMET® wire than traditional cobalt-based alloys, allowing multiple layer build-ups with no pre-heating needed.
  • ULTIMET® wire produces deposits which harden quickly through peening, machining, power hammering, burnishing, or hard particle impingement. This hardness creates a tough, ductile, wear-, corrosion-, and high-temperature resistant surface. The hardness of 30% cold-worked wrought product is approximately RC 50.
  • ULTIMET® deposits exhibit extremely high resistance to metal to metal galling and seizing.
  • The pitting resistance of ULTIMET® alloy in chloride solutions is equal to that of HASTELLOY® C-22HS® alloy, and is greater than that of C-276 alloy.


  • Valve component overlay
  • “Make/break” seal welds in threaded unions
  • Weld overlays to marine riser tensioners, shafts, and larger hydraulic system pistons
  • Weld overlay to u-bends, piping and vales used in conveying sour crudes containing abrasives
  • Slurry, rock, and acid tumblers and mixers
  • Impellers
  • Fiberglas manufacturing


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

Silicone: 0.5-1.0
Nitrogen: 0.03-0.12
Carbon: 0.02-0.10
Phosphorus: 0.030 max.
Sulfur: 0.020 max.
Boron: 0.015 max.


UNS R31233
DIN CoCr26Ni9Mo5W
DIN No. 2.4681

Minimal Mechanical Properties:

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

Available Product Forms and Sizes:

Diameter in 0.030 0.031 0.035 0.039 0.045 0.047 0.062 0.078 0.093 *0.125 *0.156x *0.187x
Diameter mm 0.76 0.80 0.89 1.00 1.10 1.20 1.60 2.00 2.40 *3.20 *4.00x *4.70x

Filler metals are available in MIG spools, TIG cut lengths, reels, and coils from the above diameters.

*Size not available in MIG spools.

˟Size not available on reels.

Standard TIG straight lengths are available in 36” (914mm) lengths. Other lengths available upon request.