GR9 Titanium Alloy Rod

GR9 titanium alloy rod (Ti-3Al-2.5V, American standard UNS R56320), as a representative of near alpha titanium alloys, exhibits irreplaceable advantages in the balance of lightweight, corrosion resistance, and processability with its unique alloy ratio and performance combination. Unlike α+β - type alloys such as Gr5, GR9 contains 3% aluminum and 2.5% vanadium, forming a microstructure with a single α - phase matrix and a small amount of β - phase distribution, resulting in a tensile strength of 620-820MPa. Although lower than Gr5's 1000MPa, it has better cold formability and low-temperature toughness, with a density of 4.43g/cm ³ slightly lower than Gr5. It complies with ASTM B348, AMS 4901 and other standards, and is designed for scenarios with strict requirements for formability and corrosion resistance.

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Chemical Composition of Titanium Gr 9 Round Bar

Mechanical Properties Of Titanium Gr 9 Round Bar

Physical Properties of Titanium Gr 9 Round Bars

The technical parameters highlight its engineering characteristics: diameter range of 10-200mm (tolerance ± 0.05- ± 0.2mm), length of 1-6 meters, yield strength ≥ 515MPa, elongation ≥ 15%, and impact toughness of 80J/cm ² in -253 ℃ liquid nitrogen environment, far exceeding Gr5's 50J/cm ². The chemical composition is Al 2.5-3.5%, V 2.0-3.0%, O ≤ 0.20%. The grain size can be refined to ASTM grade 7 through β zone annealing (760-815 ℃), resulting in a fatigue strength of 300MPa, suitable for cyclic loading conditions. Its thermal conductivity is 16.3W/(m · K) higher than Gr5, and its coefficient of linear expansion is 8.6 × 10 ⁻⁶/° C. It has excellent dimensional stability in temperature fluctuation environments.

In application scenarios, GR9 titanium alloy rods have opened up unique fields with their triple advantages of "lightweight, corrosion-resistant, and easy to form": in the aerospace field, GR9 pipes with a wall thickness of 0.8mm are bent and formed into aircraft fuel pipes, which are 40% lighter than stainless steel and have a vibration fatigue life of over 100000 times in environments ranging from -55 ℃ to 150 ℃; In cryogenic engineering, GR9 rods with a diameter of 50mm are processed into LNG storage tank supports, which maintain 90% room temperature strength in liquid methane at -196 ℃, replacing traditional 304L stainless steel and reducing weight by 60%; In the field of sports equipment, GR9 rod is forged into high-end bicycle frame fittings, with a tensile strength of 750MPa and the ability to cold bend 30 ° without cracks, meeting the requirements of lightweight and impact resistance; In medical devices, the surgical instrument clamp arm processed with GR9 rod material achieves a surface accuracy of Ra ≤ 0.4 μ m through cold extrusion molding, with better resistance to body fluid corrosion than 316L stainless steel, and no magnetic interference affecting MRI examination.
In terms of production process, the GR9 titanium alloy rod adopts three stages of vacuum consumable arc melting (VAR) to control the uniformity of alloy composition. The grain size is refined through warm rolling process (550-650 ℃), which reduces the work hardening rate by 30% compared to Gr5's hot forging process. The finished product undergoes ultrasonic testing (UT) and fluorescent penetrant testing (PT) to ensure zero defects. Surface treatment options include bright annealing, anodizing, or nickel plating, with a 5 μ m thick TiO ₂ film layer formed after anodizing, resulting in an annual corrosion rate of less than 0.001mm in marine environments. As a foreign trade supplier, we offer customized GR9 titanium alloy rods in full specifications, supporting AMS 4901-C standard low-temperature toughness certification and NACE MR0175 corrosion resistance certification. The coil packaging is vacuum filled with argon gas and moisture-proof paper, and we provide chemical composition analysis reports, mechanical performance testing data, and grain size testing results to help global customers achieve material performance optimization in areas such as aviation ducts, cryogenic equipment, and high-end equipment.

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