ASTM B348 Aerospace Gr1 Titanium Bar Description
ASTM B348 Aerospace Gr1 Titanium Bar is a commercially pure α-phase titanium rod complying with ASTM B348 standard for aerospace and general industrial applications (UNS R50250), representing the highest purity and most formable grade among commercially pure titanium (CP-Ti) materials, widely utilized in aerospace lightweight structures, chemical processing, marine engineering and high-precision component manufacturing.
Chemical composition: Ti as the balance (min. 99.5%), with strictly controlled interstitial and impurity elements (Fe≤0.20%, O≤0.18%, C 0.08%, N≤0.03%, H≤0.015%). This ultra-pure composition ensures exceptional ductility, superior corrosion resistance, stable mechanical properties and excellent weldability, making it ideal for applications requiring severe forming and long-term environmental durability.
Key characteristics: Exhibits the highest ductility and formability among all CP titanium grades (elongation≥20%), enabling deep drawing, stamping and complex forming without cracking; possesses excellent strength-to-weight ratio (tensile strength ≥240 MPa, yield strength ≥138 MPa) with density of only 4.51 g/cm³, delivering optimal weight reduction for aerospace designs; outstanding corrosion resistance to body fluids, seawater, oxidizing acids and most corrosive media, far surpassing stainless steel and aluminum alloys; excellent cryogenic properties maintaining toughness at extremely low temperatures; superior thermal stability and consistent performance across a wide temperature range (-60°C to 1100°C); excellent machinability and weldability supporting diverse manufacturing processes.
Rod form: Mainly available in round rods, with square rods and hexagonal rods as supplementary options. Produced through hot forging, hot rolling, cold drawing and precision machining processes with tight control of dimensional tolerances and straightness to meet aerospace precision requirements. Available in diameters ranging from 3mm to 200mm and customized lengths up to 6 meters.
Production process: Manufactured from high-purity titanium sponge, processed through vacuum arc remelting (VAR) for ingot homogenization, precision billet forging, sequential hot and cold working operations, stress-relief annealing, surface treatments including pickling, sandblasting, centerless grinding and precision polishing, straightening, fixed-length cutting, and comprehensive non-destructive testing (ultrasonic inspection, dimensional verification, metallographic analysis) to ensure material purity, structural integrity and compliance with ASTM B348 aerospace quality standards.
Main applications: Aerospace field (airframe structural components, lightweight support structures, hydraulic and fuel system fittings, cryogenic storage components, engine peripheral parts, honeycomb core materials); chemical industry (corrosion-resistant piping, heat exchangers, reaction vessels, pickling baskets, valve components); marine engineering (seawater desalination equipment, offshore platform components, propeller assemblies, corrosion-resistant fasteners); medical field (surgical instruments, non-implantable medical devices, dental components requiring biocompatibility); industrial sector (precision instrumentation, electronic components, cathodic protection anodes, deep-drawn parts and high-purity fluid handling systems).
Technical Specifications
Chemical Specification
|
Elements |
Ti(Bal.) |
O |
Fe |
C |
N |
H |
Other impurities |
|
Max. content |
≥99.5% |
≤0.18 |
≤0.20 |
≤0.08 |
≤0.03 |
≤0.015 |
≤0.40 |
Physical Specification
|
Mechanical properties |
Standard |
Physical properties |
Value |
Service performance |
Property features |
|
Tensile strength |
≥240 MPa |
Density |
4.51 g/cm³ |
Weldability |
Excellent |
|
Yield strength |
≥138 MPa |
Melt point |
Around 1668 ℃ |
Cold forming, bendability |
Excellent |
|
Elongation |
≥20% |
CLTE |
8.9×10⁻⁶/℃ |
Corrosion resistance |
Good |
|
Hardness |
120-150HV |
Thermal conductivity |
Around 17 W/(m・K) |
Biocompatibility |
Good |
Features & Advantages
1. High Purity & Stable Chemical Performance
This commercially pure titanium rod features a minimum 99.5% titanium content with strictly limited interstitial impurities. Controlled low levels of oxygen, nitrogen, carbon and hydrogen ensure stable material properties, high consistency and reliable quality for long-term aerospace service.
2. Superior Ductility & Outstanding Formability
As the most formable CP titanium grade, Gr1 titanium rod delivers elongation above 20%. It supports deep drawing, stamping and complex structural forming without cracking, perfectly adapting to customized processing requirements of aerospace special-shaped components.
3. Lightweight Design with Optimized Strength-to-Weight Ratio
Low density of 4.51 g/cm³ combines with balanced tensile and yield strength. It effectively reduces overall aircraft structural weight, lowers energy consumption and improves load capacity, a core lightweight material for aviation and aerospace structures.
4. Full-Range Corrosion Resistance
Excellent resistance to seawater, humid air, oxidizing media and industrial corrosive substances. It outperforms stainless steel and aluminum alloys, resisting oxidation and electrochemical corrosion in harsh high-altitude and marine aviation service environments.
5. Extreme Temperature Resistance & Excellent Thermal Stability
Maintains stable mechanical toughness under ultra-low temperature conditions and realizes reliable performance within -60°C to 1100°C. It adapts to extreme temperature changes of aerospace equipment, cryogenic storage parts and engine peripheral components.
6. Excellent Processability & Strict Aerospace Precision
Great machinability and weldability enable diversified manufacturing. Manufactured via VAR smelting and precision processing, with tight tolerance control and full NDT inspection. Multiple specifications of round, square and hexagonal rods meet high-precision assembly standards for aerospace parts.
Performance Solutions
-
Problem: Traditional aluminum and steel materials have high density, causing excessive structural weight and reducing aerospace load capacity and fuel efficiency.
Solution: ASTM B348 Gr1 titanium rod features a low density of 4.51 g/cm³ and an optimized strength-to-weight ratio, realizing effective lightweighting while maintaining structural stability for aerospace equipment. -
Problem: Common metal materials suffer from severe oxidation and electrochemical corrosion in high-altitude humid, salt fog and harsh aerospace service environments, leading to shortened service life.
Solution: Gr1 commercially pure titanium rod delivers superior comprehensive corrosion resistance, far outperforming stainless steel and aluminum alloys, and stably resists oxidizing media and salt erosion for long-term outdoor aviation operation. -
Problem: Many structural metals become brittle and lose mechanical toughness under ultra-low temperature conditions, failing to adapt to aerospace cryogenic component working conditions.
Solution: This α-phase pure titanium rod owns excellent cryogenic toughness, maintaining stable mechanical performance in extreme low-temperature environments and meeting the demands of aerospace cryogenic storage parts. -
Problem: Conventional alloy materials have poor formability, easy cracking during deep drawing, stamping and complex shaped part processing, limiting structural design flexibility.
Solution: As the most formable CP titanium grade, ASTM B348 Gr1 titanium rod has elongation ≥20%, supporting complex forming and customized processing without cracking. -
Problem: Ordinary industrial metals have unstable chemical composition and excessive interstitial impurities, resulting in inconsistent batch performance and hidden safety risks for aerospace components.
Solution: Gr1 titanium rod contains minimum 99.5% Ti with strictly controlled Fe, O, C, N, H impurities. Ultra-low interstitial elements ensure uniform chemical composition and long-term stable comprehensive performance. -
Problem: Multiple aerospace parts require on-site welding and secondary processing, while many raw materials have poor weldability and machinability, increasing production difficulty.
Solution: ASTM B348 Gr1 titanium rod has excellent machinability and weldability, compatible with diversified cutting, forming and welding processes to meet complex aerospace manufacturing needs. -
Problem: General structural materials cannot withstand long-term alternating temperature changes, prone to structural deformation and performance attenuation under continuous high and low temperature cycling.
Solution: It possesses outstanding thermal stability, maintaining reliable mechanical properties in a wide temperature range of -60°C to 1100°C, adapting to drastic temperature fluctuation of aerospace working conditions. -
Problem: Regular metal rods have loose production control, large dimensional tolerance deviation and poor straightness, unable to match high-precision aerospace assembly standards.
Solution: Manufactured via VAR remelting, precision forging and cold working, with strict control of dimensional tolerance and straightness. Complete non-destructive inspection ensures high precision and zero-defect quality for aerospace assembly.
Application
- Aerospace airframe lightweight structural components.
- High-strength lightweight support and connection structural parts for aircraft.
- Aviation hydraulic system and fuel pipeline fitting components.
- Aerospace cryogenic storage vessels and low-temperature bearing parts.
- Aviation engine peripheral auxiliary structural and fixing components.
- Aircraft honeycomb core frame and lightweight sandwich structure accessories.
- Aviation corrosion-resistant fasteners, connectors and custom formed parts.
- Aerospace extreme temperature service structural parts with long-term environmental durability.