Stellite grades

The sensitivity tests are carried out on artificial defects (nickel-chromium specimens of NFA 09.520,see figure 3 of annex 1) and natural defects (one part in "light" alloy, one part in stellite grade 1 containing micropores, 2 specimens of fracture mechanical type CT20 in Z2 CN 12.10 (NFA 03.180). 

Table 2.44. Uses of selected stellite grades Grade Description and uses...

Seal Face Combinations The dynamic of seal faces is better understood today. Seal-face combinations have come a long way in the past 8-10 years. Stellite is being phased out of the petroleum and petrochemical applications. Better grades of ceramic are available, cost of tungsten has come down, and relapping of tungsten are available near most industrial areas. Silicon carbide is being used in abrasive service. 

Porous media are also manufactured from porcelain, glass, silicon carbide, and a number of metals Monel, Inconel, nickel, bronze, Hastelloy C, Stellite L-605, gold, platinum, and many types of stainless steel. Two manufacturers of porous septa are Mott (mottcorp.com) and Pall (pall.com). The air permeabilities of Table 14-23 indicate the relative flow resistances of the various grades to homogeneous fluid but may not be used in designing a disperser for submerged... 

The substrate is most likely to be austenitic or ferritic stainless steel, high-alloy steels, nickel-base alloys (e.g., Inconels), or cast grades of Stellite (Co-Cr-W-C) materials. 

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