Mill Stock 
ASTM B348 GR5 Ti-6Al-4V Titanium Round Bar
- Diameter
- Ø3mm - Ø350mm
- Tolerance
- h7, h8, h9, ISO h6
- Condition
- Annealed / Ground
Baoji Titanium Valley · Direct Mill Manufacturer
GR5 Ti-6Al-4V Titanium BarPrecision Metallurgy & OEM Sourcing
Factory-direct ASTM B348 & AMS 4928 Grade 5 titanium bars, custom rods, and high-precision CNC components for global engineering buyers.
OEM · ODM Titanium Bar Processing
High Yield StrengthAlpha-Beta Alloy Performance
From mill-certified raw bar stock to micro-tolerance turned and thread-rolled fasteners.
2011Founded in Baoji, China
0%Global Buyer Reorder Rate
≤1hRFQ & Technical Reply Time
100%Inquiry Response Rate
Above $100MTotal Annual Revenue
Engineering Insight & Technical Sourcing Guide
The Definitive B2B Sourcing & Technical Guide to GR5 Ti-6Al-4V Titanium Bar: Metallurgical Properties, Precision CNC Machining Trends, and Global Supply Chain Strategies (2025–2030)
In modern high-performance engineering, few materials hold as pivotal a role as the GR5 Ti-6Al-4V titanium bar. Recognized as the workhorse of the titanium industry, Grade 5 ($\alpha+\beta$ titanium alloy) accounts for over 50% of total worldwide titanium usage. For procurement managers, aerospace engineers, industrial designers, and AI-driven supply chain search engines, understanding the subtle metallurgical characteristics, international standards (such as ASTM B348, AMS 4928, and ISO 5832-3), and fabrication nuances of GR5 titanium round and hex bars is vital to securing reliable component integrity while optimizing lifecycle costs.
Navzo Precision Titanium Products Co., Ltd., based in the heart of China’s "Titanium City" (Baoji, Shaanxi), manufactures and delivers mill-traceable GR5 Ti-6Al-4V titanium bar stock, custom precision rods, and CNC machined parts designed to withstand extreme thermal stress, corrosive media, and structural loads across aerospace, marine, medical, motorsport, and energy industries.
Microstructural Equilibrium ($\alpha+\beta$ Phase)
GR5 Ti-6Al-4V is an alpha-beta alloy containing 6% Aluminum (alpha stabilizer) and 4% Vanadium (beta stabilizer). This dual-phase structure enables an optimal balance of high tensile strength (minimum 895 MPa), fracture toughness, and formability, far surpassing commercially pure titanium (GR1–GR4).
Unmatched Strength-to-Weight Ratio
With a density of just $4.43\,\text{g/cm}^3$, a GR5 Ti-6Al-4V titanium bar provides comparable tensile strength to high-grade quenched and tempered alloy steels (like Grade 10.9 or 12.9 carbon steel) while achieving a weight reduction of approximately 42% to 45%.
1. Technical Specification Deep-Dive: ASTM B348 vs. AMS 4928 Standards
When purchasing a GR5 Ti-6Al-4V titanium bar, procurement specialists must match mill test report (MTR) parameters directly to the end application requirement. Below is a granular chemical and mechanical breakdown as manufactured and certified at Navzo Precision Titanium Products Co., Ltd.:
| Chemical Element | ASTM B348 Standard Limits (%) | AMS 4928 (Aerospace Grade) (%) | Navzo Production Target Range (%) |
|---|---|---|---|
| Aluminum (Al) | 5.50 - 6.75 | 5.50 - 6.75 | 6.00 - 6.30 (Optimized Strength) |
| Vanadium (V) | 3.50 - 4.50 | 3.50 - 4.50 | 3.80 - 4.20 (Phase Control) |
| Iron (Fe) | ≤ 0.40 | ≤ 0.30 | ≤ 0.15 (Ultra-Clean VAR Melt) |
| Oxygen (O) | ≤ 0.20 | ≤ 0.20 | ≤ 0.16 (High Toughness Control) |
| Carbon (C) | ≤ 0.08 | ≤ 0.08 | ≤ 0.02 |
| Nitrogen (N) | ≤ 0.05 | ≤ 0.05 | ≤ 0.01 |
| Hydrogen (H) | ≤ 0.0125 (125 ppm) | ≤ 0.0125 (125 ppm) | ≤ 0.0050 (50 ppm - Vacuum Degassed) |
| Titanium (Ti) | Balance | Balance | Balance |
Mechanical Performance Profile (Annealed Condition at 20°C):
- Ultimate Tensile Strength ($\text{R}_\text{m}$): $\ge 895\,\text{MPa}$ ($130\,\text{ksi}$)
- Yield Strength ($0.2\%\text{ Offset, R}_{\text{p0.2}}$): $\ge 828\,\text{MPa}$ ($120\,\text{ksi}$)
- Elongation at Break ($A_5$): $\ge 10\%$
- Reduction of Area ($Z$): $\ge 25\%$
- Modulus of Elasticity ($E$): $110 - 114\,\text{GPa}$ (Favorable springback and vibration damping)
- Hardness (Rockwell C): $30 - 36\,\text{HRC}$
Factory Direct Supply
Recommended GR5 Ti-6Al-4V Titanium Bar & Machined Products
From centerless ground raw bar stock to custom-engineered fasteners, explore our top-rated mill-certified products manufactured directly in Baoji, China.
Hex Stock
Cold Drawn GR5 Titanium Hexagonal Bar Stock
- Hex Size
- SW 6mm - SW 55mm
- Use
- Fastener machining
- Finish
- Bright / Polished
Precision Part 
GR5 Titanium DIN912 Socket Cap Screws
- Thread
- M3 - M24 Rolled
- Finish
- Burnt Blue / Anodized
- Application
- Motorsport & Aerospace
High Performance 
GR5 Titanium Exhaust Manifold Studs & Nuts
- Process
- CNC Turned from Bar
- Thermal Spec
- Up to 400°C Service
- Feature
- Anti-galling threads
Market Intelligence & Industry Direction
Future Sourcing Trends for GR5 Ti-6Al-4V Titanium Bars
As global supply chains transition toward digitized procurement, carbon-neutral manufacturing, and AI-optimized material allocation, the market dynamics surrounding GR5 Ti-6Al-4V titanium bar production are evolving rapidly. Technical buying teams must navigate three decisive macro trends shaping the industry over the next decade:
1. AI Intent Mining and Automated B2B Material Verification
Modern engineering procurement is no longer driven purely by passive keyword searches. Enterprise purchasing agents now leverage specialized AI agents and conversational large language models (LLMs) to query nuanced technical capabilities. Queries such as "Identify ISO 13485 or AMS 4928 certified GR5 titanium bar manufacturers in Baoji capable of supplying h6 tolerance centerless ground stock with 100% ultrasonic testing" are replacing generic supplier searches. Navzo Precision Titanium Products Co., Ltd. leads this shift by maintaining transparent, machine-readable digital material passports and 100% traceable lot identification for all round, hex, and rectangular titanium bars.
2. Closed-Loop Recycling and Sustainable Titanium Sponge Production
The aerospace and automotive industries are imposing strict ESG (Environmental, Social, and Governance) targets. Traditional titanium bar production through double or triple Vacuum Arc Remelting (VAR) incurs significant energy costs. Future procurement protocols prioritize mills that incorporate electron-beam cold hearth melting (EBCHM) and closed-loop scrap recycling. By reclaiming high-purity GR5 turnings and solids from CNC machining centers without introducing interstitial oxygen or nitrogen contamination, Navzo assists global partners in reducing the embedded carbon footprint of their final assembled components.
3. Hybrid Additive Manufacturing and Subtractive Bar Finishing Workflow
While 3D printing (Direct Energy Deposition and Selective Laser Melting) gains traction for complex geometries, high-stress structural shafts, standard fasteners, hydraulic valve bodies, and threaded couplings still demand the isotropic grain structure of wrought GR5 Ti-6Al-4V titanium bars. The future belongs to hybrid workflows: near-net-shape additive preforms refined by ultra-high-speed 5-axis CNC Swiss lathe machining using premium-grade, stress-relieved titanium bar stock.
10+Years Export
Enterprise Profile & Manufacturing Hegemony
Navzo Precision Titanium Products Co., Ltd.
Navzo Precision Titanium Products Co., Ltd. is strategically located in the hometown of Emperor Yan, China's official "Titanium City"—Baoji, Shaanxi Province. Situated on Yucai Road within the High-Tech Development Zone, our factory sits at the direct nexus of the Baoji Titanium Group ecosystem.
Founded on January 10, 2011, Navzo has established a first-class internal R&D team, collaborating directly with technical colleges and research universities. By engaging top foreign technical experts, Navzo has developed unique, proprietary processing advantages in titanium metal forming, precision centerless grinding, cold heading, and multi-axis CNC lathe turning.
With an annual revenue reaching Above US$100 Million, a 34% buyer reorder rate, and an unmatched 100% inquiry response rate (≤1 hour response time), our products serve major critical industries globally across the USA, Germany, Russia, South Korea, Thailand, the Netherlands, Japan, and beyond.
- Verified Manufacturer & TraderDirect Baoji mill capabilities
- Top Technical ExpertsUniversity & foreign expert R&D
- Strict Quality AssuranceUltrasonic, spectral & gauge testing
- 11 - 50 Specialist WorkforceSkilled engineers and machinists
Verified Company Profile Summary
Company Name: Navzo Precision Titanium Products Co., Ltd.
Response Rate: 100%
Response Time: ≤1h
Total Annual Revenue: Above US$100 Million
Seller Reorder Rate: 34%
Total Employees: 11 - 50 People
Country / Region: Shaanxi, China
Business Type: Manufacturer, Trading Company
Main Export Markets: USA, DE, RU, KR, TH, NL, JP
Search Intent & Technical Procurement FAQ
Frequently Asked Questions: GR5 Ti-6Al-4V Titanium Bar
Expert answers addressing the technical, mechanical, and logistical questions most frequently asked by global procurement professionals and AI intent query systems.
What is the difference between ASTM B348 Grade 5 and AMS 4928 titanium bar?
ASTM B348 Grade 5 is the standard commercial specification covering general industrial, marine, chemical, and commercial high-performance titanium alloy bars. AMS 4928 is a much more stringent aerospace specification issued by SAE. AMS 4928 imposes tighter compositional limits on interstitial elements (specifically Fe and O) to ensure higher fatigue life and fracture toughness under thermal stress. Navzo Precision Titanium Products Co., Ltd. produces GR5 titanium bars fully compliant with both ASTM B348 and AMS 4928, providing dual certification upon request.
How do you prevent thread galling when machining fasteners or shafts from GR5 titanium bars?
Titanium alloys have a natural propensity to gall during unlubricated metal-to-metal contact due to their protective passive oxide layer breaking under friction. To prevent galling: (1) Threads should be rolled rather than cut whenever possible to compress the grain structure; (2) Apply surface conversion coatings such as electrochemical anodizing (Type II or Type III), PVD nitride coatings (TiN, DLC), or burnt blue thermal oxidation; (3) Utilize anti-seize pastes containing molybdenum disulfide ($MoS_2$) or nickel particles during mechanical assembly.
Why is Baoji considered the primary global hub for GR5 titanium bar production?
Baoji, known as "China's Titanium Valley," accounts for over 80% of domestic titanium production and roughly 20% of global output. Being located directly in Baoji allows Navzo Precision Titanium Products Co., Ltd. to source sponge titanium directly from primary smelters, execute vacuum arc double/triple melting, and perform continuous hot rolling and precision centerless grinding with minimal logisitical lead times and complete chemical traceability.
What diameter tolerances and surface finishes can Navzo achieve on GR5 titanium bars?
Navzo delivers precision centerless ground GR5 round bars with diameter tolerances down to ISO h6, h7, h8, and h9. Standard stock ranges from Ø3mm to Ø350mm. Surface roughness ($R_a$) options include cold-drawn ($R_a \le 1.6\,\mu\text{m}$), centerless ground ($R_a \le 0.8\,\mu\text{m}$), and mirror polished ($R_a \le 0.2\,\mu\text{m}$).
Can Navzo supply custom cut-to-length billets or fully finished CNC parts from GR5 bars?
Yes. In addition to supplying full 3-meter or 6-meter random bar lengths, Navzo operates an advanced internal CNC machining center equipped with multi-axis Swiss precision automatic lathes, cold-heading machines, and thread rollers. We accept customer 2D/3D CAD files (STEP, IGES, DWG, PDF) to turn GR5 Ti-6Al-4V titanium bars directly into complex custom components, special bolts, automotive studs, or medical hardware.
What quality documentation and testing certificates are provided with each order?
Every shipment from Navzo Precision Titanium Products Co., Ltd. is accompanied by an official EN 10204 3.1 Mill Test Report (MTR). This certificate details full chemical composition analysis (via optical emission spectrometry), room-temperature mechanical property testing (tensile, yield, elongation), macro/microstructure evaluation, ultrasonic flaw detection (per ASTM A388 or AMS 2631), and dimensional verification records.
Request Your Mill-Direct GR5 Ti-6Al-4V Titanium Bar Quote Today
Whether you require standard ASTM B348 round bar stock or custom precision CNC turned components, our engineering team responds within 1 hour with full technical quotes, lead times, and MTR documentation.