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Products－Industrial temperature sensor－Metal protection tubes and thermowells－Main materials and characteristics
Thermowell for Temperature Sensor
Main Materials and Characteristics of Metallic Protection Tubes and Thermowells
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Material
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Fabric
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Max Temp Limit
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Features
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Pipe
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Bar Stock
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Normal
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Max
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SUS304
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○
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○
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850
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950
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Having high heat resistance, acid resistance, and alkali resistance
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SUS316
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○
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○
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850
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950
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Almost same as SUS304 in heat resistance, acid resistance and alkali resistance, but corrosion resistance higher than SUS304 at high temperature
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SUS316L
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○
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○
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850
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950
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Carbon amount decreased from SUS316,iIntergranular corrosion resistant material
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SUS310S
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○
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○
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1050
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1100
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Having high NiCr content. High heat resistant steel which has high oxidation resistance at high temperature
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UMCo50
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○
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○
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1150
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1200
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Co base alloy. High heat resistant alloy which has abrasion resistance and sulfuric resistance.
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INCONEL 600
(NCF600)
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○
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○
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1000
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1250
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Having good corrosion resistance against oxidizing or reducing atmosphere and extremely low sensibility against cracking by stress and corrosion
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INCOLOY 800H
(NCF800H)
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-
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○
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1100
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1260
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Having good resistance against at high temperature, cementation and creep, and also against corrosion at high temperature
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HASTELLOY B
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-
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○
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500
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800
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Nickel based alloy, having good resistance against heat and corrosion and, especially, against corrosion by hydrochloric acid
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HASTELLOY
C276
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-
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○
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900
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1090
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Having good corrosion resistance against sulfuric compound and chloride and being used for various processes in chemical industries. Also having good corrosion resistance after welding.
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SUC4
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-
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○
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1000
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950
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Special material for 600 MW power plants.
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SUH446
(AISl446)
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-
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○
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1000
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1100
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27Cr steel. Endurable against reducing flame and sulfuric gas
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TITANIUM
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○
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○
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250
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500
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Corrosion resistance at low temperature is fairly good, but oxidized and fragile at high temperature
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MONEL400
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-
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○
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500
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1000
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Ni-Cu alloy, having good resistance especially against sea water and also various types of acid or alkaline solution
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KANTHAL AF
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○
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-
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1100
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1300
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Having mechanical strength at high temperature. Not suitable for welding of metallic fittings
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C4
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○
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○
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300
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550
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Excellent corrosive resistance for alkali and acid industries
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Thermowell for Temperature Sensor
Types and Characteristics of Surface Treatments and for Metallic Protection
Tubes and Thermowells including Covers
Type
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Max Temp Limit（℃）
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Features
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Normal
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Max
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PFA Coating
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200
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250
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Having good corrosion resistance against chemicals. Corrosion resistance not changed even if temperature changes. Mechanical strength greater compared to other resin coating.
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Glass Lining
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250
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350
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STPG370 used as the base material. Acid resistance is good but alkali resistance inferior.
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Ceramic Coating
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1200
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1300
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Having good acid resistance. The coating material, if oxidized chrome contained, has good alkali resistance. Abrasion resistance is also good.
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Hard Facing
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600
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750
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Having good resistance against corrosion and abrasion, and also against acid and alkali.
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Tantalum Cover
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350
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500
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Having resistance against all acids, but getting fragile in air at high temperature.
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FEP Cover
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180
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200
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4-6 fluorocarbon resin product, having resistance against most of chemicals. Other PFA resin product for higher temperature also available.
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.jpg) FEP Cover
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