4009 – RC-60 Hard Overlay Hot Spray Powder

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Our code 4009, is a self fluxing nickel-chrome-boron-silicon powder which, when applied with a spray and fuse oxy-acetylene torch, produces dense pore-free, hard, grindable coatings. It will resist wear be it abrasive grains, hard surfaces or particle erosion.

  • Special gas atomized powders designed for use in all spray and fuse “puddle torches”.
  • Spherically shaped particles promote excellent powder flow through torch components.
  • Custom balanced particle sieve distribution creates the highest powder efficiency with the lowest amount of overspray.


Typical Properties

Nominal Chemistry

 Cr 15% , Fe 4.5% , Si 4.5% , B 3.5% , Ni Balance

 Particle Size: -140+325 mesh


Melting Temperature: 1875°F (1024°C)

Coating Hardness: RC 59-62

Essentially non-porous.

Application: Brake drums, forging tools, exhaust valves and valve seats.

4009 coatings produce a metallurgical bond with the substrate and have a smooth texture after fusing. It can be finished to size by grinding only.