Precision Sizing & Surface
Supplied in black hot-rolled, pickled, cold-drawn, peeled, and centerless ground execution. Diameter tolerance controlled strictly within ISO h7, h8, h9, and h11 for automatic bar feed Swiss-lathes and CNC centers.
ENGINEERING GRADE MATERIAL · ASTM B348 / ASME SB348
ASTM B348 Titanium Round Bar: Global Procurement & Technical Specification Guide
Direct factory production of commercially pure (Grades 1, 2, 3, 4) and alloyed titanium bars (Grade 5 Ti-6Al-4V, Grade 7, Grade 12). Manufactured in Baoji Titanium Valley under ISO 9001 with 100% ultrasonic testing and BaoTi Test Center verified EN 10204 3.1 MTC.
ISO 9001:2015 Certified
Diameters: Ø3mm – Ø350mm
Ground Tolerances to ISO h7–h11
100% Ultrasonic Testing (AMS 2631)
2006Established Year
19+Years Global Export
100tAnnual Bar Capacity
BaoTiAuthorized Testing
100%MTC 3.1 Traceable
≤8hRapid Engineering Quote
Technical Mastery
What Global Procurement Teams Need to Know About ASTM B348
ASTM B348 serves as the international benchmark specification for standard titanium and titanium-alloy bars, billets, and rods across chemical processing, power plants, offshore energy, aerospace components, and advanced mechanical fabrication.
In international precision procurement, sourcing ASTM B348 titanium round bars involves balancing chemical purity, thermo-mechanical processing states, macrostructural grain boundaries, and geometric roundness. At Jovzi Titanium Industry Co., Ltd., we bridge the gap between raw sponge titanium reduction and tight CNC machining demands.
ASTM B348 covers four commercially pure (CP) grades (Grades 1 through 4) and a variety of alloyed matrices, including the workhorse Grade 5 (Ti-6Al-4V), corrosion-resistant Grade 7 (Ti-0.15Pd), high-ductility Grade 9 (Ti-3Al-2.5V), and crevice-resistant Grade 12 (Ti-0.3Mo-0.8Ni). Achieving compliance requires comprehensive control over interstitial elements—specifically Oxygen (O), Nitrogen (N), Carbon (C), and Hydrogen (H)—which dictate whether a bar retains ductility or succumbs to micro-cleavage cracking under cyclical stress.
Controlled Vacuum Annealing
Bars undergo stress-relieving and recrystallization annealing inside computer-managed vacuum furnaces (≤10⁻³ Pa) to ensure zero hydrogen pick-up and eliminate surface alpha-casing.
100% BaoTi Center Verification
Beyond our internal laboratory spectrographic and universal tensile testers, Jovzi commissions official independent verification from the authoritative BaoTi Test Center to validate mechanical and chemical integrity.
Engineering Selection
ASTM B348 Titanium Round Bar Product Matrix & Recommendations
Select the optimal titanium alloy grade matched precisely to your corrosion media, mechanical tensile envelope, operating temperature, and machining budget.
| Titanium Grade | UNS Number | Nominal Composition | Tensile Strength (Min. MPa) | Yield Strength 0.2% (Min. MPa) | Elongation (%) | Recommended Applications |
|---|---|---|---|---|---|---|
| Gr1 CP Grade 1 | R50250 | Unalloyed CP-Ti (Low O₂) | 240 | 170 | ≥ 24 | Extreme deep drawing, plate heat exchangers, chlor-alkali cell anode stems, marine cooling. |
| Gr2 CP Grade 2 | R50400 | Unalloyed CP-Ti (Standard) | 345 | 275 | ≥ 20 | Chemical reactors, flue gas desulfurization (FGD), marine shafts, seawater piping, pump shafts. |
| Gr5 Grade 5 | R56400 | Ti-6Al-4V (Alpha-Beta) | 895 | 828 | ≥ 10 | Aerospace structural fasteners, turbine blades, high-strength racing components, marine subsea shafts. |
| Gr7 Grade 7 | R52400 | Ti-0.15Pd (Palladium) | 345 | 275 | ≥ 20 | Severe reducing acids (HCl, H₂SO₄), chemical process autoclaves, high-chloride crevice environments. |
| Gr9 Grade 9 | R56320 | Ti-3Al-2.5V (Near-Alpha) | 620 | 483 | ≥ 15 | High-pressure hydraulic line fabrication, marine sports equipment, lightweight structural shafts. |
| Gr12 Grade 12 | R53400 | Ti-0.3Mo-0.8Ni | 483 | 345 | ≥ 18 | High-temperature brine systems, chemical heat transfer equipment, geothermal valves and impellers. |
Strategic Sourcing
Future Procurement Trends for ASTM B348 Titanium Round Bar
Procurement directors and supply chain managers in 2025 and beyond must navigate shifting trade policies, raw material sponge price volatility, and evolving compliance mandates.
1. Dual-Sourcing & "China Titanium Valley" Clustering
Global supply chains are moving away from single-source vulnerabilities. As European and American OEMs realign their vendor bases following geopolitical disruptions in conventional Eastern European supply chains, Baoji (Shaanxi, China)—known as the World's Titanium Valley—has emerged as the premier manufacturing hub.
Tier-1 and Tier-2 buyers increasingly establish direct factory partnerships with ISO 9001 certified Baoji fabricators like Jovzi Titanium Industry Co., Ltd. to secure continuous ingot supply, bypass costly western distributor markups, and compress delivery lead times.
- Direct procurement straight from integrated melting and forging centers.
- Sponge-to-billet price transparency insulating projects from volatile spot markets.
- Multi-currency settlement support (USD, EUR, AUD, HKD, CNY).
2. Stringent ESG & Certified Circular Recyclability
Procurement decisions are no longer evaluated solely on cost-per-kilogram. International mandates such as the European Union's Carbon Border Adjustment Mechanism (CBAM) and corporate ESG commitments demand verifiable carbon footprints for energy-intensive metals.
ASTM B348 bar procurement will favor mills utilizing renewable energy inputs and certified vacuum-arc-remelt (VAR) furnaces that accommodate clean, traceable turnings and scrap recycling without interstitial gas pickup.
- Full traceability from raw sponge reduction to finished packaged bar.
- Automated batch tracking through verifiable heat numbering.
- Documentation of energy consumption and environmental controls per ISO 14001 guidelines.
Industry Foresight
Technological & Industry Development Trends of Titanium Bars
How cutting-edge manufacturing breakthroughs and emerging downstream industries are transforming the titanium bar landscape.
1. Feedstock for Additive Manufacturing & Precision Plasma Atomization
The rapid expansion of electron beam melting (EBM) and plasma atomization powder production has generated intense demand for small-diameter ASTM B348 Grade 5 ELI and Grade 23 titanium bars. High-velocity plasma atomizers require ultra-straight, mirror-surface round wire and bar feedstock with strictly controlled micro-porosity and interstitial gas metrics.
Bar manufacturers are implementing continuous eddy-current inspection and automated rotary straightening lines to deliver tight h7-grade tolerance feedstocks optimized for additive manufacturing pulverizers.
2. Clean Energy, Green Hydrogen & Desalination Megaprojects
Decarbonization megaprojects are opening massive demand frontiers. In PEM (Proton Exchange Membrane) water electrolyzers, titanium round bars are essential for machining current distributor rods, electrode cores, and bipolar plate support stems that resist catastrophic oxidation in acidic, anodic potentials.
Simultaneously, massive reverse-osmosis (RO) desalination facilities in the Middle East and North Africa require large-diameter ASTM B348 Grade 2 and Grade 12 forged bars for high-pressure seawater pump impellers, shafts, and manifold tie-rods.
ISO 9001 · BaoTi Test CenterComplete physical & chemical test certification per heat
Enterprise Strength & E-E-A-T Authority
Jovzi Titanium Industry Co., Ltd. — Built in China's Titanium Valley
Established in 2006, Jovzi Titanium Industry Co., Ltd. is an ISO 9001-certified precision manufacturing facility headquartered in the heart of Baoji High-Tech Development Zone, Shaanxi, China. We specialize in the integrated smelting supervision, forging, machining, centerless grinding, and global export of non-ferrous metal materials—including Titanium, Nickel, Tantalum, Molybdenum, and Tungsten.
Backed by an experienced technical engineering workforce of more than 50 professionals—including 4 senior experts and 5 intermediate metallurgy specialists—we control the complete workflow from raw VAR ingot conversion to precision-ground round bars. All products manufactured by our company can provide the certificate of quality test issued by the nationally recognized authority: "BaoTi Test Center".
Our annual manufacturing and processing capacity is speeding up to expand 100 tons, serving clients across North America, Germany, Canada, Belgium, Japan, and India. Following our core operating principles of "Strengthen management, Sincerity first, Best quality, and Continuous innovation", we guarantee reliable metallurgical integrity and zero-defect deliveries.
- Year Established
- 2006 (19+ Yrs Industry Presence)
- Technical Team
- 4 Senior Experts + 5 Intermediate
- Testing Authority
- BaoTi Test Center Verification
- Annual Capacity
- Expanding 100 Tons
Buyer Knowledge Base
ASTM B348 Titanium Round Bar: Frequently Asked Questions
Detailed technical, quality, and logistics answers to the questions most commonly asked by international procurement specialists and AI search engines.
What is the technical difference between ASTM B348 and aerospace AMS 4928 specifications?
ASTM B348 is the governing standard specification for titanium and titanium alloy bars and billets for general industrial, chemical processing, marine, and commercial mechanical engineering. AMS 4928 is an aerospace-specific standard that applies to Ti-6Al-4V bars. While the chemical composition ranges largely overlap, AMS 4928 requires more stringent controls on interstitial elements (such as lower maximum hydrogen content), strict microstructural grain size verification, prohibition of surface alpha-case layer, and compulsory 100% immersion ultrasonic testing per AMS 2631 Class A/AA. Jovzi Titanium produces bars to both ASTM B348 and AMS 4928 according to your project requirements.
What diameter tolerances and surface finishes can Jovzi Titanium provide for ASTM B348 bars?
We provide ASTM B348 round bars in multiple conditions:
- Hot Rolled & Pickled / Descaled: Standard diameter tolerance typically ±0.4mm to ±0.8mm; ideal for general machining and forging blanks.
- Rough Peeled / Turned: Surface roughness Ra ≤ 3.2μm, diameter tolerance ±0.2mm to ±0.5mm; commonly used for large diameter bars (Ø50mm–Ø350mm).
- Cold Drawn: Diameters from Ø3mm to Ø20mm with tight tolerances (h9–h11).
- Precision Centerless Ground & Polished: Diameter tolerance held strictly to ISO h7, h8, or h9, with surface roughness down to Ra 0.4–0.8μm; ready for high-speed automated Swiss lathe CNC turning.
How does Jovzi Titanium prevent hydrogen embrittlement and control interstitial gases?
Titanium has a high affinity for interstitial elements—oxygen, nitrogen, and hydrogen—at temperatures above 400°C. To ensure ductile, crack-free bars, Jovzi uses only vacuum arc remelted (VAR) ingots smelted under strict vacuum levels. All subsequent thermal treatments (stress relief, full annealing) are carried out in computer-regulated vacuum heat-treatment furnaces maintained below 10⁻³ Pa. Final spectrographic testing verifies that Hydrogen remains well below 0.015% (150 ppm), and Oxygen levels conform strictly to grade boundaries (e.g., ≤0.25% for Gr2, ≤0.20% for Gr5).
What certificates and non-destructive testing reports are provided with each order?
Every shipment from Jovzi Titanium is accompanied by an authentic EN 10204 3.1 Inspection Certificate (MTC) detailing:
- Ingot melt heat number and traceability batch number.
- Complete chemical spectrographic analysis (Ti, Al, V, Fe, C, N, H, O, Pd, Ni, Mo).
- Mechanical tensile strength (Rm), 0.2% proof yield strength (Rp0.2), elongation (A%), and reduction of area (Z%).
- Ultrasonic non-destructive testing (NDT) results per ASTM B348 and AMS 2631 standards.
- Upon request, independent third-party physical and chemical verification certificates issued by the authorized BaoTi Test Center.
What are your minimum order quantities (MOQ), custom cut services, and export lead times?
For standard inventory sizes (Ø8mm to Ø120mm in Gr2 and Gr5), our MOQ is as low as 1 kg or 1 piece, with shipping ready in 3 to 5 business days. For customized forging diameters or precision centerless ground bars with specific heat treatment, the standard production turnaround is 15 to 20 calendar days. We offer precision band-saw cutting to your specified billet lengths, face chamfering, and export packaging in reinforced wooden crates with anti-scratch interleaving.
How does ASTM B348 Grade 2 compare directly with Grade 5 (Ti-6Al-4V) for machining?
Grade 2 is commercially pure (CP) titanium with an alpha phase structure. It offers exceptional corrosion resistance in wet chlorine, nitric acid, and seawater, along with excellent cold formability and moderate strength (yield ≥ 275 MPa). Grade 5 is an alpha-beta alloy featuring 6% Aluminum and 4% Vanadium; it provides nearly triple the yield strength (yield ≥ 828 MPa) with heat-treatable capability, making it the premier choice for aerospace, motorsport fasteners, and defense. In machining, Grade 2 is prone to "gummy" chip adhesion, requiring sharp positive rake tooling, while Grade 5 generates higher cutting temperatures and requires high-pressure coolant and rigid machine setups.
Direct Engineering Consultation
Request a Detailed Technical Quote for ASTM B348 Titanium Bars
To receive a rapid engineering assessment, dimensional tolerance check, and direct factory pricing within 8 hours, please include the following parameters in your inquiry:
- Titanium Grade (Gr1, Gr2, Gr5, Gr7, Gr12)
- Diameter & Length Dimensions (mm / inch)
- Surface (Hot Rolled, Peeled, Ground h7/h8)
- Total Quantity or Cut Billet Count
- Required Testing (BaoTi Center / Ultrasonic)
- Incoterms (FOB, CIF, DDP, Express)
Jovzi Titanium Industry Co., Ltd.
Email
[email protected]
Manufacturing Headquarters
No. 3, Gaoya Industrial Zone, Bayu Town, High-Tech Development Zone, Baoji, Shaanxi, China
Factory Response Time
≤ 8 hours (Professional Metallurgical Engineering Team)
Quality Certification
ISO 9001 Certified · BaoTi Authorized Laboratory Reports Available