Thermowells for Temperature Element – Flanged Thermowell

Material

Operating Temp.

Max Temp.

Features

Monel

500

600

· Exellent resistance to water vapor, high pressure and corrosion.

Plain Steel

800

900

· Good resistance to reducing atmosphere but less resistant to oxidation and acids attacks.

SUS304

900

1,000

· Widely used as common protection tube against heat and corrosion but not recommendable for use in the presence of sulphur or reducing flame.

SUS304L

900

1,000

· Less carbon content (C=0.03%) than SUS304 and excellent resistance to grain boundaly corrosion.

SUS316

900

1,000

· Contains Molybdenum and excellent resistance to acid and alkali.

SUS316L

950

1,050

· Less carbon content than SUS316 and has better resistance to heat, acid and alkali.

SUS310

950

1,050

· High Mi-Cr content so it has an optimal high temperature strength with resistance to oxidation at high temperatures.

SUS347

900

1,000

· Nb-Ta content more corrosion resistant than SUS304 and has better corrosion resistance to chromium depletion.

SUS446

1,050

1,125

· High Chromium content excellent for heat resistance and oxidation resistance and specially excellent for sulphur and reducing gas.

Inconel600
(Inconel600)

1,175

1,345

· Excellent for resistance to oxidation at high temperature but It us fragile in hydrogen environment and very weak to corrosion in sulphur.

Platinum 10% + Rhodium

1,550

1,850

· Excellent for resistance to oxidation and inert at high temperaiure.

Tantalum

Oxi 300
Red 2,200

2,610

· Good at acids but weak at alkaly and oxidation and above 300℃

Molybdenum

Oxi 300
Red 2,201

2,985

· It has excellent mechanical strength up to 1500℃ when used in inert, reduced or vacuum atmosphere. Can withstand metal steam at high temperatures but graphite and reaction. Air and oxygen-containing gases are not available.