Abratig Co25

Abratig Co25

Cobalt-based filler metal Stellite Grade 25

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Product description

Cobalt-based filler metal, Stellite Grade 25*, for Argon gas or oxyacetylene flame-protected TIG hardfacing of parts subject to combined or unrelated wear: abrasion, metal-to-metal friction, corrosive environments at temperatures up to 1100°C, even in the presence of sulfurous atmospheres. High resistance to erosion and cavitation.

Product application instructions

  • Aeronautics: engine parts, exhaust ducts, blades,

  • Nuclear and chemical: high-temperature valves, sheaths, components subject to hot corrosion,

  • Medical: implants (in certain variants or finishes),

  • Industry: tools or parts subject to high thermal loads.

Wear resistance

Corrosion

Temperature

Classification

EN 14700 DIN 8555
S Co1 WSG-20-GZ-250-CKTZ

Typical weld metal composition (%)

C Si Mn Cr Ni W Mo Fe Co
0.15 0.9 0.7 21.0 9.8 15.0 0.03 3.0 Rest

All weld metal mechanical properties

Hardness
~ 230 HB

Why choose ABRATIG Co25 filler metal?

Choosing the TIG filler metal cobalt grade 25 (also known as Stellite 25) offers very specific advantages, especially when it comes to combining mechanical strength, high-temperature resistance and corrosion resistance.

Here’s why this filler metal is an excellent choice for certain demanding applications:

  1. Excellent high-temperature resistance

Cobalt grade 25 retains its mechanical properties up to 980°C (or even higher), making it ideal for :

  • gas turbines,
  • aeronautical exhaust equipment,
  • environments with high heat and mechanical stress.
  1. Excellent resistance to oxidation and corrosion

It holds up particularly well:

  • to hot oxidation,
  • to oxidant corrosion,
  • aggressive marine and chemical environments.
  1. Good resistance to wear and creep

Although its wear resistance is not as extreme as grade 6, it retains very good dimensional stability under prolonged stress at high temperatures (creep resistance).

  1. Good TIG weldability

Despite its complex composition (Cobalt – Chromium – Nickel – Tungsten – Iron), it welds well in TIG, with :

  • little hot cracking,
  • a clean depot,
  • excellent adhesion on suitable substrates