General Information

PT-MAT™ P-6551S is a metal powder where very hard particles of spherical cast tungsten carbide (SFTC) are mixed with a NiBSi alloy matrix.
PT-MAT™ P-6551S can be applied through PTA welding (Plasma Transfer Arc) or Laser cladding.


PT-MAT™ P-6551S is applied through plasma powder surfacing or laser cladding on low alloy to high alloy steel.
Typical applications are equipment submitted to severe abrasive and erosive wear with moderate impact and corrosion.
Very efficient coating for radial bearing in conjunction with PT-MATTM P-6550S

Composition (weight)

35 % PT-MAT™ -N51 (Ni,B,Si matrix powder)
65% PT-MAT™ -SFTC (Spherical cast tungsten carbide)

Physical Properties


PT-MAT™ -N51: 48-52 HRC
PT-MAT™ -SFTC: 2650-3000 HV0,1

Melting point:

PT-MAT™ -N51: < 1200°C ()
PT-MAT™ -SFTC 2860°C()


PT-MAT™ -N51 8.4 g/cm³
PT-MAT™ -SFTC 16.4 g/cm³

Apparent density (Hall): 6-7.5 g/cm3
Flow rate (Hall): 7-9 seconds
Typical sizing available : 45-150 microns (+325-100 mesh) or 53-180 microns (+270-80 mesh).
Material is not machinable but can be removed or finished by grinding.


10 lbs plastic bottles.
Other packaging available on request (plastic or metal pails).

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