ASTM B348 Aerospace Gr4 Titanium Bar Description
ASTM B348 Aerospace Gr4 Titanium Bar is a high-strength commercially pure α-type titanium rod complying with ASTM B348 standard for aerospace and heavy-duty industrial applications, and it is the highest-strength grade of commercial pure titanium widely applied in high-load aerospace components and high-pressure precision industries.
Chemical composition: Ti ≥ 99.0%, with strictly controlled trace interstitial impurities (Fe, O, C, N, H), guaranteeing stable mechanical performance, outstanding structural stability and long-term service reliability under harsh aerospace working conditions.
Key characteristics: Superior comprehensive mechanical properties among all commercially pure titanium grades; remarkable hardness and tensile strength, significantly higher than Gr1 and Gr2; limited but qualified formability and weldability for structural processing; exceptional corrosion resistance against high-altitude humid air, salt fog and harsh chemical media, as well as durable structural stability under continuous high-load pressure and extreme low-temperature environments.
Rod form: Available in round rods as the mainstream type, plus square rods and hexagonal rods; manufactured through hot rolling, precision forging and cold drawing processes, with strict dimensional control to meet high-load aerospace assembly demands.
Main applications: Aerospace field(high-strength lightweight structural parts, high-pressure bearing components, load-bearing fasteners and long-term cryogenic service parts); chemical industry(heavy-duty corrosion-resistant pipelines and pressure vessels); marine engineering(deep-sea high-load corrosion-resistant fittings); industrial field(high-strength structural accessories for extreme pressure and harsh atmospheric environments).
Technical Specifications
Chemical Specification
|
Elements |
Ti(Bal.) |
O |
Fe |
C |
N |
H |
Other impurities |
|
Max. content |
≥99.0% |
≤0.40 |
≤0.50 |
≤0.08 |
≤0.05 |
≤0.015 |
≤0.40 |
Physical Specification
|
Mechanical properties |
Standard |
Physical properties |
Value |
Service performance |
Property features |
|
Tensile strength |
≥550 MPa |
Density |
4.51 g/cm³ |
Weldability |
Excellent |
|
Yield strength |
≥485 MPa |
Melt point |
Around 1668 ℃ |
Machinability |
Excellent |
|
Elongation |
≥15% |
– |
– |
Corrosion resistance |
Good |
|
Hardness |
160-220 HV |
– |
– |
Low temperature performance |
Good |
Features & Advantages
- Highest strength among commercially Pure titanium: Gr4 titanium rod delivers the ultimate tensile strength and hardness in CP titanium series, far exceeding Gr1 and Gr2, perfectly suitable for high-load aerospace structural requirements.
- Superior load-bearing & anti-pressure: PerformanceIt maintains stable mechanical strength under continuous high pressure and heavy service loads, ensuring structural safety for aerospace key bearing components.
- Outstanding overall corrosion resistance: Resists high-altitude humid air, salt fog, oxidation and harsh atmospheric media effectively, preventing metal degradation and extending the service life of aviation parts in severe environments.
- Reliable low-temperature structural stability: Excellent low-temperature toughness without cold brittleness, maintaining stable performance for aerospace cryogenic components and extreme temperature working conditions.
- High-purity & stable chemical properties: Strictly controlled trace impurities and high titanium purity guarantee consistent batch quality, long-term structural stability and high reliability for aerospace long-cycle operation.
- Premium lightweight structural advantage: Low density and high specific strength realize significant weight reduction of aircraft parts, helping improve flight efficiency and equipment payload capacity.
- Qualified processability for structural fabrication: With proper formability, machinability and weldability, it meets the cutting, forging and assembling demands of customized aerospace high-strength parts.
- Aerospace-grade precision & quality control: Produced via VAR remelting, precision hot working and strict non-destructive inspection, with tight dimensional tolerance and straightness to satisfy high-precision aviation assembly standards.
Performance Solution
Problem: Common aluminum alloy and ordinary pure titanium materials have insufficient tensile strength and hardness, unable to bear heavy load for aerospace key structural parts.
Solution: ASTM B348 Aerospace Gr4 Titanium Rod is the highest-strength grade among commercial pure titanium, with outstanding hardness and mechanical strength, fully meeting high-load bearing demands of aerospace critical components.
Problem: Low-strength metal materials are prone to structural deformation, fatigue damage and fracture under long-term continuous high-pressure and alternating load in aviation service.
Solution: Gr4 titanium rod features excellent structural stability and high fatigue resistance, maintaining stable mechanical performance and avoiding deformation or failure under long-term heavy working load.
Problem: Traditional aviation metals suffer from severe oxidation, salt fog corrosion and atmospheric erosion in high-altitude and harsh flight environments, leading to shortened service life.
Solution: This aerospace-grade Gr4 titanium rod provides powerful resistance to humid air, oxidizing media and salt corrosion, effectively reducing material aging and extending component service life.
Problem: Many high-strength alloys become brittle and lose toughness in ultra-low temperature conditions, bringing major safety risks to aerospace cryogenic equipment.
Solution: Gr4 commercially pure titanium retains reliable low-temperature toughness without cold brittleness, ensuring safe and stable operation of aerospace low-temperature pressure-bearing parts.
Problem: Conventional high-strength materials have excessive impurity content and unstable composition, resulting in inconsistent batch performance and poor aerospace application reliability.
Solution: Gr4 titanium rod adopts high-purity raw materials with strictly controlled trace impurities, realizing uniform chemical composition and long-term stable comprehensive performance.
Problem: Most high-hardness structural materials have poor cutting performance and weak weldability, increasing processing difficulty and manufacturing cost for aerospace customized parts.
Solution: ASTM B348 Gr4 titanium rod has moderate formability, qualified machinability and weldability, adapting to multi-process machining and on-site assembly requirements.
Problem: Ordinary structural metals are sensitive to extreme temperature changes, easy to produce performance attenuation and structural failure under wide temperature cycle conditions.
Solution: Gr4 titanium rod possesses excellent thermal stability, adapting to complex temperature fluctuation environments of aerospace and maintaining long-term structural integrity.
Problem: Ordinary round rod products have loose production standards, large dimensional errors and poor straightness, which cannot meet high-precision assembly requirements of aerospace equipment.
Solution: Gr4 titanium rod is manufactured by precision forging, hot rolling and cold drawing, with strict non-destructive inspection and tight tolerance control, satisfying high-precision assembly standards for aerospace engineering.
Application
- High strength load bearing structural components for aerospace main and auxiliary structures.
- Heavy duty lightweight connecting parts and high pressure supporting components for aircraft.
- High strength corrosion resistant fittings for aviation hydraulic and fuel delivery systems.
- Aerospace low temperature pressure components and long service cryogenic structural parts.
- High hardness non magnetic precision functional parts for airborne equipment.
- Aviation high load fasteners, locking parts and anti fatigue structural accessories.
- Aerospace components serving in high altitude salt fog, humid and severely corrosive environments.
- Ultra high strength lightweight structural parts for aerospace extreme working condition equipment.