12. MELtING TEMPERATURES OF METALS
87
Summary table metallic thermowell materials
Designation Nominal
composition
Max.
temp.
Meting range Application notes
(con´t.serv., air)
Inconel 600
76 %
15,5 %
Nickel
Chromium
2,100 °F
1,148 °C
2,470-2,575 °F
1,354-1,412 °C
Good in several corrosive environ-
ments and at elevated tempe-
ratures. High hot strength and
resistance to progressive oxidation.
Incoloy 800 32,5 %
46 %
21 %
Nickel
Iron
Chromium
2,000 °F
1,093 °C
2,475-2,525 °F
1,357-1,385 °C
Good elevated temperature resis-
tance to oxidation and carburiza-
tion. Good sulphur and corrosion
resistance.
Hastelloy B
61 %
28 %
Nickel
Molybdenum
2,200 °F
1,204 °C
2,300-2,470 °F
1,260-1,354 °C
Excellent corrosion resistance to
hydrochloric, sulphuric phospho-
ric, and acetic acids. Excellent
corrosion. Resistance to hydrogen
chloride gas.
Hastelloy C
54 %
16 %
15,5 %
4 %
Nickel
Molybdenum
Chromium
Tungsten
2,200 °F
1,204 °C
2,300-2,470 °F
1,260-1,354 °C
Excellent corrosion resistance to
many chemical environments, in-
cluding ferric and cupric chlorides,
contaminated mineral acids, wet
chlorine gas. Oxidation resistance
to 982 °C.
Hastelloy X
47 %
9 %
22 %
0,5 %
Nickel
Molybdenum
Chromium
Tungsten
2,200 °F
1,204 °C
2,300-2,470 °F
1,260-1,354 °C
Good high temperature strength
and resistance to oxidations to
1,200 °C. Also good for reducing
conditions.