It is a form of 316 Stainless Steel
As to the designation -
C (first letter) means the service it is intended to be used in this case - corrosion resistant service ,
F(second letter) -The second letter indicates the approximate location of the alloy on the iron-chromium-nickel (FeCrNi) ternary diagram. For users familiar with the diagram, the second letter does provide an indication of the nominal iron, nickel, and chromium content, but most people would have to obtain alloying information from a material specification.
8M - the third and fourth digits represent the maximum permitted carbon content in units of 0.01% (e.g., CF8M has a maximum of 0.08% carbon)
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It is a form of 316 Stainless Steel
As to the designation -
C (first letter) means the service it is intended to be used in this case - corrosion resistant service ,
F(second letter) -The second letter indicates the approximate location of the alloy on the iron-chromium-nickel (FeCrNi) ternary diagram. For users familiar with the diagram, the second letter does provide an indication of the nominal iron, nickel, and chromium content, but most people would have to obtain alloying information from a material specification.
8M - the third and fourth digits represent the maximum permitted carbon content in units of 0.01% (e.g., CF8M has a maximum of 0.08% carbon)
Read more: What_is_the_meaning_of_CF8M_in_engg
CF8M represents a metal alloy consisting of iron-chromium-nickel-molybdenum.
It's a modified version of CF8. They just added the moly.
cf8m is a Sharpe Valve model # , 1000 CWP means it is rated for 1000psi Constant Working Pressure
8.9E10-6 in/inF at 70-212F
It is a casting of 316 stainless, with higher values of Nickel, Chromium, and Silicon.
year 2000
National Chemical Laboratory