2006
Established in Baoji
100 T
Annual Forging Capacity
ISO 9001
Certified Quality Control
100% UT
Ultrasonic Defect Checked
Engineered Titanium Components & Assemblies
Direct-from-factory solutions conforming to ASTM, ASME, DIN, and ISO standards for naval retrofit, heavy galvanic operations, and demanding subsea pipelines.
Hot sell thin titanium fishing rods price per kg
Titanium Gr1 Gr2 2"-5" V Band Clamp With Flanges
Anodizing Gr2 Titanium Shaft with Copper Hook for Plating
Grade2 Titanium Jigs Rack Hook Tube Components
Gr2 Anodising Titanium Basket With PP Anode Bags
Titanium Flange Ball Valve 150 LB 300 LB WOG
Titanium Blind Exhaust Flange 4" ANSI 150/300 lbs Gr2
ASTM B381 Forging Metallurgical Benchmark & Mechanical Integrity
Titanium seamless rolled rings and open-die forgings produced to ASTM B381 represent the peak of structural integrity for safety-critical pressure boundary components. Unlike rolled and welded plate rings or cast geometries, our forged rings undergo multi-directional hot working that refines grain structures and establishes contiguous tangential grain flow. This delivers unmatched fracture toughness, fatigue cycle endurance, and resistance against stress corrosion cracking (SCC) in aggressive chloride-bearing media.
Jovzi Titanium manufactures ASTM B381 forgings across all commercial grades, focusing on Grade F-2 (unalloyed CP Titanium) for general seawater handling and chemical vessels, Grade F-5 (Ti-6Al-4V) for high-strength rotating marine equipment, Grade F-7 (Ti-0.15Pd) for severe reducing-acid environments, and Grade F-12 (Ti-0.3Mo-0.8Ni) for high-temperature brine heat exchangers. Every forging is subjected to strict stoichiometry control, thermal homogenization, and mill anneal protocols to ensure low interstitial elements (C, H, O, N, Fe) strictly conforming to international aerospace and pressure vessel codes.
Chemical Composition & Mechanical Properties Matrix (ASTM B381 Specification)
| Forging Grade | UNS Number | Tensile Strength min. (MPa) | Yield Strength 0.2% min. (MPa) | Elongation min. (%) | Key Chemical Elements (%) |
|---|---|---|---|---|---|
| Grade F-1 | R50250 | 240 | 170 | 24 | Fe: 0.20 max, O: 0.18 max |
| Grade F-2 | R50400 | 345 | 275 | 20 | Fe: 0.30 max, O: 0.25 max |
| Grade F-5 | R56400 | 895 | 828 | 10 | Al: 5.5-6.75, V: 3.5-4.5, Fe: 0.40 max |
| Grade F-7 | R52400 | 345 | 275 | 20 | Pd: 0.12-0.25, Fe: 0.30 max, O: 0.25 max |
| Grade F-12 | R53400 | 483 | 345 | 18 | Mo: 0.2-0.4, Ni: 0.6-0.9, Fe: 0.30 max |
Our forging procedures incorporate complete billet skin removal, controlled induction pre-heating within tight window tolerances, hydraulic press die-upsetting, and automated radial-axial ring rolling. Every ring undergoes non-destructive evaluation (NDE) via Contact or Immersion Ultrasonic Testing (UT) per ASTM B381 Section 11 and AMS 2631, eliminating internal micro-voids, segregations, or inclusion clusters before precision machining.
Local Application Scenarios in Constanța & Dobrogea Region
Constanța serves as Romania's premier commercial hub and the most strategic deep-water maritime port on the Black Sea. Operating at the confluence of heavy maritime transport, the Danube-Black Sea Canal, offshore oil & gas extraction, and critical chemical infrastructure, local engineers encounter unique operational hurdles requiring the mechanical capabilities of ASTM B381 titanium forged rings:
Offshore Deepwater Extraction (Neptun Deep)
Black Sea offshore developments demand corrosion-resistant alloys that tolerate cold seabed temperatures alongside high pressure and hydrogen sulfide exposure. ASTM B381 Grade F-5 and Grade F-12 forged rings act as critical subsea blowout preventer (BOP) gaskets, wellhead seal rings, and subsea riser tie-ins where crevice corrosion is unacceptable.
Port Naval Engineering & Ship Repair
Shipyards at the Port of Constanța and Midia routinely overhaul commercial merchant vessels, navy ships, and offshore workboats. Seamless titanium forged rings are machined into propulsion shaft sleeves, rudder bearings, seawater ballast control valve bodies, and scrubbers that offer 40+ year lifespans completely immune to microbiologically influenced corrosion (MIC).
Refining & Petrochemicals (Midia & Năvodari)
Processing acidic crude oil, hydrotreater effluents, and brine stripping requires materials resistant to pitting attack. Grade F-2 and F-7 forged nozzle reinforcing rings, tube sheet blanks, and autoclave vessel bodies ensure uninterrupted operations with zero chloride-induced pitting throughout cyclic thermal swings.
Local Industry Trends in Constanța's Maritime & Energy Sector
The Dobrogea economic zone is experiencing a strategic renaissance driven by the transformation of Constanța into the Black Sea's central energy and transshipment hub. Several macro industrial dynamics are driving the demand for specialized titanium forgings:
1. Acceleration of Black Sea Gas Infrastructures: Projects like Neptun Deep require subsea gathering pipelines, production platforms, and processing stations. These harsh conditions call for ASTM B381 Grade F-5 and Grade F-12 rings over standard duplex stainless steels to avoid hydrogen embrittlement and catastrophic stress failures.
2. Marine Decarbonization and SOx Scrubber Upfits: In alignment with IMO Marpol Annex VI and strict European Maritime Safety Agency (EMSA) regulations across EU waters, shipowners calling on Constanța are rapidly retrofitting exhaust scrubbers. Grade 2 unalloyed titanium forgings and blind flanges are the industry standard for marine scrubber wash-water lines carrying low-pH, sulfuric acid-laden seawaters.
3. Nuclear Power Expansion at Cernavodă: Just inland from Constanța along the Danube Canal, Cernavodă Nuclear Power Plant is expanding Units 3 & 4. Titanium condensators, forged tubesheets, and ring assemblies remain vital for heat-exchange loops where zero-leakage conditions must be maintained over multi-decade cycles.
Why Constanța Procurement Teams Partner With Jovzi Titanium
Founded in 2006 in Baoji—the globally recognized "Titanium Valley of China"—Jovzi Titanium Industry Co., Ltd. operates integrated vacuum-arc remelting (VAR), hydraulic free-forging presses, radial ring rolling machines, and 5-axis CNC machining centers. We provide international EPC contractors and Constanța machine works with authentic, mill-traceable forgings backed by verified quality guarantees:
Full Mechanical Traceability (EN 10204 3.1)
Every single ASTM B381 ring is etched with its parent ingot heat number. Each delivery includes authentic EN 10204 3.1 inspection certificates covering complete chemical spectrographic analysis, room and elevated temperature tensile trials, bend tests, and hardness numbers.
Independent BaoTi Test Center Verification
Beyond our internal laboratory diagnostics, Jovzi Titanium routinely verifies material batches through the CNAS-accredited BaoTi Test Center, ensuring completely impartial validation of fracture toughness, microstructures, and grain sizes.
Bespoke Ring Rolling & Rapid Tooling
With engineering leadership including 4 senior and 5 intermediate metallurgy specialists, we produce custom near-net-shape rings with outer diameters reaching 1074 mm, minimizing expensive buy-to-fly weight ratios and on-site machining scrap.
Frequently Asked Questions for Constanța Procurement Teams
How do forged rings perform against pitting in the Black Sea?
Black Sea surface waters possess a salinity of around 1.7–1.8% alongside anaerobic conditions and high hydrogen sulfide at depths beyond 150 meters. Unalloyed Grade 2 and Palladium-stabilized Grade 7 titanium generate an indestructible passivated TiO2 oxide barrier that exhibits zero detectable corrosion in all depths, outperforming Super Duplex (2507) and Nickel 625.
What international testing accompanies your ASTM B381 deliveries?
Our standard supply includes full EN 10204 3.1 certification, ultrasonic examination (UT) per AMS 2631 or ASTM E114, liquid penetrant testing (PT) per ASTM E165, and macro/micrographic structural assessments. Third-party witness inspections (SGS, TÜV, DNV GL, Bureau Veritas) can be facilitated upon contract inception.
What is your typical lead time and shipping route to Port of Constanța?
Standard forged ring runs or near-net shapes take approximately 2 to 3 weeks for forging, heat treating, rough turning, and testing. Shipments can arrive via air freight to Bucharest Otopeni (OTP) or Constanța Airport (CND) within 5–7 days, or via dedicated ocean container lines directly into the Port of Constanța.
Can Jovzi manufacture custom rings to CAD/STEP files?
Yes. Over 60% of our orders are OEM engineered geometries. Simply submit 2D fabrication prints (DWG/PDF) or 3D STEP/IGES models with your required dimensional tolerances, rough-machined allowances, and specified surface roughness (Ra) targets.