High-Temperature Performance Sub-categories: High-temperature seals → High-temperature steel → High-temperature ceramics → High-temperature lubricants/fluids → High-temperature tapes & hoses → Selection recommendations.
I.
High-Temperature Seals: FKM as the baseline, FFKM for extreme conditions
High-temperature seals (critical for high-temp applications): FKM (Fluoroelastomer)—DuPont Viton/3M Dyneon/Daikin (temperature resistance of 200–250°C, chemical resistance; standard for hydraulic and chemical sealing); FFKM (Perfluoroelastomer)—DuPont Kalrez/Daikin (temperature resistance of 320°C; for extreme semiconductor/chemical conditions); Silicone rubber—temperature resistance from -60 to 250°C, electrical insulation, standard high-temp O-rings; Choosing the wrong high-temp sealing material = leakage + production downtime (Industry consensus: avoid NBR/Nitrile rubber above 150°C; use FKM for 150–250°C; use FFKM for temperatures above 250°C).
Domestic substitution: Sino-Seal (Zhongmi Holdings)—ranked among the global top five for mechanical seals, specializing in high-temp seals for nuclear power and petrochemical industries; domestic high-temp seals have successfully gained market share in the petrochemical and nuclear power sectors.
II. High-Temperature Steels and Ceramics: The Backbone of Furnace and Thermal Equipment
High-temperature steels (for furnaces/thermal equipment): 310S stainless steel (withstands 1050°C; used for furnace components and high-temperature piping); high-temperature alloys—GH series/Inconel (withstands >1000°C; used for aero-engines, furnace components, and heat treatment tooling); high-chromium cast iron (resists high temperatures and abrasive wear; used for sintering machine grate bars). Key domestic manufacturers: Fushun Special Steel (domestic leader in high-temperature alloys), TISCO (310S/heat-resistant plate), and CITIC Special Steel (heat-resistant steel). Evaluation criteria for high-temperature steels focus on oxidation resistance and high-temperature strength (based on both temperature and duration).
High-temperature ceramics (furnace linings/kiln furniture): Alumina ceramics (withstands 1600°C; furnace linings); Silicon Carbide/SiC (withstands >1600°C, high thermal conductivity; kiln furniture/heat exchangers); Mullite/Corundum refractories (furnace linings). High-temperature ceramics are standard for furnaces and kilns, offering a service life far exceeding that of metal linings.
III.
High-Temperature Lubricants, Tapes, and Hoses
High-temperature lubricants (high-temperature lubrication): Synthetic oils (PAO/esters/polyethers—offer heat and oxidation resistance; essential for high-temperature hydraulic systems, whereas mineral oils tend to form deposits/coke above 150°C); high-temperature greases (synthetic ester lithium-based/bentonite/calcium sulfonate complex—withstands >200°C; used for high-temperature bearings and chain lubrication). Brands: Mobil/Shell/Castrol high-temperature series; domestic Great Wall/Kunlun high-temperature series (cost-effective options). Synthetic oils are the preferred choice for high-temperature hydraulic systems (offering oil change intervals 2–3 times longer than mineral oils).
High-temperature tapes/hoses: PTFE hoses/tapes (260°C temperature resistance, chemical resistance, fluid transport), fiberglass cloth tapes (500°C temperature resistance, thermal insulation wrapping), and silicone rubber hoses (200°C temperature resistance)—essential choices for high-temperature fluid transport and equipment insulation.
IV.
Recommendations for Selection: Match Material to Temperature, Review Data, and Conduct Trial Orders
Four recommendations for selection: First, match the material to the temperature—general-purpose parts for up to 150°C (NBR/standard steel), 150–250°C (FKM/silicone/alloy steel), and 250°C+ (FFKM/ceramics/superalloys/refractory materials); second, review test reports—temperature resistance ratings (ASTM D2000/aging tests/high-temperature strength data); third, verify via trial orders—actual service life under high-temperature conditions (testing in high-temp furnaces, with high-temp oils, or on-site sealing performance data); fourth, consider domestic alternatives—Zhongmi Holdings (high-temp sealing), Fushun Special Steel (superalloys), and Great Wall high-temp lubricants—domestic high-temp consumables offer excellent cost-performance ratios, though high-end imports (DuPont/Daikin/Mobil) still dominate the market (industry consensus).
Selection reference: FKM seals (200–250°C), 310S steel (1050°C), alumina ceramic furnace linings (1600°C), synthetic lubricants (high-temp hydraulics), and PTFE hoses for fluid transport (260°C)—match the material to the specific application scenario.
V.
Summary: Temperature Rating + Material Matching + Aging/Service Life
Core conclusion: How to evaluate high-temperature performance in industrial consumables—three key factors: temperature rating (first confirm operating temperature), material matching (correctly select FKM/FFKM/ceramics/310S/synthetic oils), and aging/service life (high temperatures accelerate aging; service life must be verified through actual testing).
Quick-reference guide: High-temperature seals—DuPont Viton/Daikin FKM, Kalrez (FFKM), and domestic substitutes from SINOPEC SMT; high-temperature steels—310S/superalloys (Fushun Special Steel/TISCO); high-temperature ceramics—alumina/silicon carbide (1600°C furnace linings); high-temperature lubricants—synthetic oils (Mobil/Shell/Great Wall high-temp series);
high-temperature tapes and hoses—PTFE/fiberglass cloth/silicone rubber. Rule of thumb: General-purpose materials for up to 150°C; FKM for 150–250°C;
FFKM/ceramics/superalloys for above 250°C—ensure temperature, material, and specifications all align to prevent failures with high-temperature consumables.
