Hard Faces

MECHANICAL SEAL HARD FACE MATERIALS

Hard Face MaterialHardnessElastic Modulus ETensile StrengthThermal ExpansionThermal ConductivityDensityTemperature LimitCoeff.of Friction
MohsGN/m2MN/m2µm/mKWatts/m°Kmg/mm3°C(a)vs. Carbon
Gray cast iron510020010457.2200
Hastelloy “B”6230130018458.9800
M-2 Tool steel7200200011258.2500
Niresist410040018157.4500
316 Stainless420060016168600
440C Stainless520080010257.8600
Stellite7220100014158.41000
T/C – Cobalt860014004100154000.07
T/C – Nickle8600600590152500.07
Ceramic 85%82001505123.414000.07
Ceramic 99.5%83502507253.917000.07
SiC Alpha Sintered9.740025041303.110000.02
Sic Reaction Bonded9.740025041503.110000.02
(a) Severe oxidation in air, or significant loss of hardness, or changed microstructure.
Hard Face Material
VickersN/mm2Watts/m°CGm/cc.°C(a)
Siliconized graphite
PE-8148200016501.95232
Reaction Bonded
PR924224003651453.081372
Reaction Bonded
plus graphite PG97231521532.8538
Alpha sintered
PS-1007030004001303.11649
PS-1013830004071303.11649

Posted

  • On February 09, 2018