Material of high-temperature thermocouple tip

Type B: Platinirhodium 30-Platinirhodium 6; Type K: Nickelchromium-Nickelsilicon

316SS, 321SS, GH39, INCONEL600, Monel alloy, etc； You need to choose according to different temperature conditions.

Material, Maximum Operating Temperature (°C), Applicable Applications: Stainless steel (SS 316): 800; Used in environments with general corrosive agents and at low temperatures. Chromium steel and 12CrMoV stainless steel: 800; Resistant to high pressures, suitable for use with high-pressure steam. Cr25Ti stainless steel and Cr25Si2 stainless steel: 1000; High-temperature steels suitable for use in corrosive media such as nitric acid and phosphoric acid, as well as in environments with high wear. GH39 high-nickel-based stainless steel: 1200; Resistant to high temperatures. High-temperature industrial ceramics and alumina: 1400–1800; Resistant to high temperatures, but with poor airtightness and inability to withstand pressure. Mullite corundum and pure corundum: 1600; Resistant to high temperatures, with good airtightness and temperature resistance, as well as certain corrosion resistance. Monel alloy: 200; Hydrofluoric acid. Nickel: 200; Concentrated alkalis (soda ash, caustic soda). Titanium: 150; Wet chlorine gas, concentrated nitric acid. Zirconium, niobium, tantalum: 120; Have better corrosion resistance than titanium, Monel, and Hastelloy. Lead: Normal temperature; 10% nitric acid, 80% sulfuric acid, sulfurous acid, phosphoric acid

Select the most economical option based on medium temperature and corrosivity.

Type B: Platinum-rhodium; Type K: Nickel-chromium, nickel-silicon

The head consists of two layers twisted together; there is no special material used

High-temperature resistant industrial ceramics and alumina

LZ is asking about the material of the casing, right? Corundum, silicon carbide, silicon nitride, 2520, 600, 800, etc. Specifically, it depends on the operating conditions of the application.