Introduction
Aerospace grade titanium refers to high-purity, tightly inspected titanium and titanium alloy that meets rigorous aviation industry certification standards, designed to withstand extreme temperature, high cyclic load and harsh high-altitude working environment. It differs greatly from regular industrial titanium on impurity control, mechanical tolerance and certification requirements. This FAQ sorts specification rules, mainstream grades and procurement tips based on CNBJTI aerospace titanium supply criteria.
Q1: Key strict standards defining aerospace-grade titanium
Ultra-low impurity control: Strict limit on iron, carbon, oxygen and hydrogen content; excess interstitial impurities will drastically reduce fatigue resistance under repeated flight vibration, a core difference from common civilian industrial titanium.
Full batch inspection certification: Every production batch needs mechanical property test, ultrasonic flaw detection and material traceability report, qualified with aerospace-level certification before delivery.
Stable high & low temperature performance: Maintains consistent tensile strength from -196℃ cryogenic to over 400℃ high operating temperature for supersonic aircraft parts.
Q2: Most widely used mainstream aerospace titanium grades
1. Grade5 Ti-6Al-4V (Ti64) | #1 dominant aerospace alloy
The most universal aviation titanium grade, occupies over 70% of aerospace titanium consumption: balanced tensile strength, ductility and fatigue performance; used for aircraft landing gear fittings, engine compressor blades, fuselage structural brackets and missile parts.
2. Grade23 Ti-6Al-4V ELI (Extra Low Interstitial)
Ultra-low impurity improved variant of Ti64, superior fracture toughness and cryogenic performance; preferred for aerospace critical safety components and spacecraft cryogenic storage parts.
3. Grade1/Grade2 Commercially Pure Aerospace Titanium
Excellent cold formability and corrosion resistance; mainly for aircraft hydraulic tubing, cabin thin-wall formed parts and airframe corrosion-prone auxiliary fittings.
Q3: Core application fields on aircraft & aerospace equipment
Civil aviation passenger plane: fuselage structural components, engine casing, landing gear small fittings, hydraulic seamless tubes;
Military fighter jet: high-temperature engine parts, lightweight wing connecting structures;
Spacecraft & rocket: cryogenic fuel tank accessories, satellite structural frames.
Q4: Aerospace manufacturer RFQ & purchasing guidance
Specify aerospace-level certification requirements on purchase order, reject ordinary industrial non-aerospace grade blank;
Request full MTR (Material Test Report) with ultrasonic inspection record for each batch;
Distinguish regular Ti64 vs ELI low-interstitial variant per component’s working temperature and safety grade.
Conclusion
Aerospace-grade titanium is high-spec certified titanium/alloy with rigid impurity & inspection rules, dominated by Ti-6Al-4V series; it is irreplaceable for aircraft lightweight high-load parts while regular industrial titanium fails aviation safety standard.