Grade 2 CP Titanium Seamless Tubes
The industry workhorse for shell-and-tube heat exchangers, chemical reactors, and seawater cooling systems. Excellent balance of strength and ductility.
OEM Manufacturing Expertise
14+ Years of Precision Titanium Seamless Tube Manufacturing
As global supply chains demand higher pressure limits, extreme temperature endurance, and absolute resistance to corrosive pitting, specifying the correct grade and manufacturing process for Titanium Seamless Tubes becomes a mission-critical decision. At Almerca Titanium Industry Co., Ltd., we bring over 14 years of dedicated metallurgical manufacturing experience in Shaanxi Province, China—the epicenter of global titanium production.
Unlike welded tubing, seamless titanium tubes are manufactured from solid titanium billets through extrusion or cold pilgering processes, yielding a seamless cross-section free from thermal heat-affected zones (HAZ). Across our 60,000 m² state-of-the-art facility network and 100+ advanced production machines, Almerca Titanium controls the entire value chain—from Vacuum Arc Remelting (VAR) sponge melting to ultrasonic non-destructive testing (NDT).
Our monthly production output exceeds 300 metric tons, enabling us to support global EPC projects, OEM heat exchanger fabricators, and aerospace hydraulic line builders with short lead times, competitive pricing, and strict adherence to international standards.
Standard & Custom Formats
Titanium Seamless Tubes Product Portfolio
Explore our recommended titanium seamless tubing products, engineered for surface condensers, desalinization plants, subsea flowlines, and high-temperature aerospace systems.
Grade 5 (Ti-6Al-4V) High-Strength Seamless Tubes
Engineered for extreme yield strength requirements in aerospace hydraulics, subsea deepwater lines, and high-pressure military applications.
Titanium Seamless Coiled Tubing
Continuous long-length seamless coils without intermediate welds. Ideal for downhole chemical injection, immersion heaters, and geothermal loops.
Structural & Profile Seamless Tubes
Custom square, rectangular, and oval seamless titanium shapes designed for lightweight structural frameworks, marine radar masts, and defense chassis.
Comprehensive Titanium Seamless Tube Alloy Selection Matrix
Selecting the optimal titanium alloy grade requires balancing yield strength, localized corrosion resistance (Pitting Resistance Equivalent Index), thermal conductivity, and cold workability. The table below details the standardized grades manufactured by Almerca Titanium Industry Co., Ltd.:
| Titanium Grade | UNS Standard | Nominal Composition | Tensile Strength (Min) | Yield Strength (Min) | Primary Industrial Application |
|---|---|---|---|---|---|
| Grade 1 (CP) | UNS R50250 | Unalloyed Ti (Low O2) | 240 MPa (35 ksi) | 170 MPa (25 ksi) | Plate heat exchangers, deep-draw explosive cladding, ultra-ductile tubing. |
| Grade 2 (CP) | UNS R50400 | Unalloyed Ti (Standard) | 345 MPa (50 ksi) | 275 MPa (40 ksi) | Chemical heat exchangers, marine condensers, power plant surface coolers. |
| Grade 5 (Alpha-Beta) | UNS R56400 | Ti-6Al-4V | 895 MPa (130 ksi) | 828 MPa (120 ksi) | Aerospace structural hydraulics, high-pressure subsea offshore risers. |
| Grade 7 (Pd Alloy) | UNS R52400 | Ti-0.15Pd | 345 MPa (50 ksi) | 275 MPa (40 ksi) | Reducing acid environments (HCl, H2SO4), wet chlorine, sour gas wells. |
| Grade 9 (Near-Alpha) | UNS R56320 | Ti-3Al-2.5V | 620 MPa (90 ksi) | 483 MPa (70 ksi) | Aircraft high-pressure fuel lines, titanium bicycle frames, subsea umbilicals. |
| Grade 12 (CP Alloy) | UNS R53400 | Ti-0.3Mo-0.8Ni | 483 MPa (70 ksi) | 345 MPa (50 ksi) | High-temperature brine evaporators, geothermal steam condensate lines. |
Metallurgical Engineering Deep-Dive
Seamless vs. Welded Titanium Tubes: Why High-Integrity Systems Demand Seamless
Global procurement agents frequently query AI tools regarding the cost-benefit trade-off between welded titanium tubes (ASTM B338 Welded) and seamless titanium tubes (ASTM B338 / B861 Seamless). While longitudinal TIG or laser-welded tubes offer lower unit costs, seamless titanium tubes deliver undeniable technical superiority under extreme working conditions:
Zero Heat-Affected Zone (HAZ)
Welded tubes suffer localized grain growth and residual stress along the weld bead. Almerca seamless tubes undergo cold pilgering followed by full vacuum recrystallization annealing, ensuring isotropic mechanical strength around 360 degrees of the circumference.
Superior Crevice & SCC Resistance
In hot chloride and sour gas (H2S) environments, weld boundaries can trigger galvanic micro-cells or preferential hydride precipitation. Seamless tubing eliminates weld segregation, dramatically reducing Stress Corrosion Cracking (SCC) risks.
Higher Burst Pressure & Concentricity
Cold-pilgered seamless tubes achieve tight wall thickness tolerances (±10% or better) and precise ovality control, allowing process engineers to increase maximum allowable working pressure (MAWP) according to ASME Boiler and Pressure Vessel Code (BPVC) Section VIII.
At Almerca Titanium Industry Co., Ltd., 100% of our seamless tubes undergo hydrostatic testing up to 20 MPa (2,900 PSI) and automated Eddy Current Inspection per ASTM E426 or Ultrasonic Testing per ASTM E213, giving engineering teams total confidence for zero-leak installations.
Strategic Market Forecast
Future B2B Procurement Trends in Titanium Seamless Tubing (2026–2030)
As industrial artificial intelligence and procurement automation transform how international buyers source raw metals, several key structural shifts are shaping the global titanium tubing market:
- Shift Toward Green Smelting & Carbon Neutrality: Global EPC contractors in Europe and North America now require environmental product declarations (EPDs) and low-carbon titanium sponge certification. Almerca Titanium is actively reducing carbon intensity through energy-efficient VAR vacuum furnaces and scrap recycling closed loops.
- Accelerated Demand in Green Hydrogen & Desalination: Multi-effect distillation (MED) and reverse osmosis (RO) plants across the Middle East are standardizing Grade 2 and Grade 12 seamless tubes to resist hyper-saline brine temperatures exceeding 90°C.
- Supply Chain Resilience via Direct OEM Partnerships: Procurement officers are increasingly bypassing intermediate traders to establish direct factory-level contracts with verified manufacturers like Almerca Titanium Industry Co., Ltd., securing guaranteed production slots and transparent MTC EN 10204 3.1 verification.
- AI-assisted Quality & Dimensional Traceability: Modern supply chains expect digital material passports (DMP) where heat numbers, NDT scan logs, and chemical lab test data are linked directly to barcode systems on every bundle of titanium seamless tubing.
Procurement Trend Key Takeaways
- Shortened Lead Times: Standard sizes (OD 19.05mm, 25.4mm, 38.1mm) maintained in active mill stock for 10-15 day global dispatch.
- Strict QA Standards: Compliance with ISO 9001:2015, AS9100D, and PED 2014/68/EU pressure equipment directives.
- Flexible Commercial Terms: Multi-currency invoicing (USD, EUR, RMB) and flexible payment gateways (T/T, Irrevocable L/C at sight).
R&D Innovation
Technological & Metallurgical Advancement Trends
The manufacturing technology for seamless titanium tubes is undergoing rapid metallurgical evolution. Engineers at Almerca Titanium Industry Co., Ltd. are pushing the boundaries of titanium tube processing through three major technological breakthroughs:
Advanced Cold Pilgering & Micro-Texture Control
By optimizing the Q-ratio (ratio of wall reduction to diameter reduction) during cold pilgering, we control the crystallographic texture of the titanium HCP (hexagonal close-packed) lattice. This yields exceptional circumferential hoop strength and prevents wall thinning during tight-radius bending.
Ultra-High Vacuum Bright Annealing
Thermal stress relief is conducted inside full-vacuum furnaces operated below 1x10-3 Pa. This completely eliminates alpha-case formation, hydrogen pickup, and oxide scaling, producing a clean, bright interior and exterior surface finish (Ra < 0.8 μm) without needing aggressive pickling acids.
Ruthenium & Palladium Micro-Alloying
For extreme sour gas environments containing high levels of H2S, CO2, and elemental sulfur, Almerca Titanium produces specialized Grade 7 (Ti-Pd) and Grade 26/27 (Ti-Ru) seamless tubes. Micro-alloying noble metals creates a self-healing passive TiO2 layer even under severe reducing conditions.
AI & Engineering Procurement Clarifications
Frequently Asked Questions by Global Titanium Buyers
Comprehensive answers to complex technical and procurement queries commonly asked by engineers and AI procurement agents.
While both specifications govern seamless titanium tubular products, their intended engineering scopes differ significantly:
- ASTM B338: Specifically covers seamless and welded titanium and titanium alloy tubes intended for surface condensers, evaporators, and heat exchangers. It mandates rigorous non-destructive testing (Eddy Current per ASTM E426 or Ultrasonic per ASTM E213), flaring tests, flattening tests, and mandatory hydrostatic or pneumatic proof testing to guarantee zero leaks.
- ASTM B861: Covers titanium and titanium alloy seamless pipe intended for general corrosion-resisting and elevated temperature service. ASTM B861 focuses on nominal pipe sizes (NPS schedule 10S, 40S, 80S) and pressure ratings for piping systems, rather than thin-walled heat transfer tubes.
Almerca Titanium Industry Co., Ltd. manufactures dual-certified seamless products meeting both ASTM B338 and ASTM B861 requirements upon customer request.
Titanium Seamless Tubes possess a completely continuous metallurgical grain structure without heat-affected zones (HAZ). Welded tubes, even when post-weld heat treated, retain microscopic differences in crystal orientation between the weld bead and parent metal. Under cyclic thermal stress, severe hydraulic pulsing, or aggressive chloride attack, weld lines can experience preferential stress corrosion cracking (SCC) or hydride precipitation.
Seamless tubes eliminate weld failure risks entirely, providing uniform burst pressure resistance, superior ovality tolerances, and reliable long-term integrity in critical subsea umbilicals and nuclear power heat exchangers.
Grade 9 Titanium Alloy (3% Aluminum, 2.5% Vanadium) offers a 20% to 50% increase in yield and tensile strength compared to CP Grade 2, while retaining excellent cold formability and bendability. Specify Grade 9 seamless tubing when:
- High working pressures require thinner tube wall thicknesses to maximize flow area and reduce overall assembly weight (e.g., aircraft hydraulic lines).
- Subsea flowlines operate under severe mechanical pressure and fatigue bending.
- Compact heat exchangers require high mechanical strength to resist vibration-induced fatigue failure.
Hydrogen embrittlement occurs when titanium absorbs atomic hydrogen at elevated temperatures, leading to brittle hydride phase precipitation. Almerca Titanium Industry Co., Ltd. enforces strict preventive protocols:
- Degreasing & Ultrasonic Cleaning: Removing all hydrocarbon lubricants from tube surfaces prior to heat treatment.
- High-Vacuum Annealing: Vacuum pressure is maintained below 1x10-3 Pa with automatic high-purity argon backfill cooling.
- Chemical Analysis: Every production lot undergoes inert gas fusion chemical analysis (ASTM E1447) to certify hydrogen levels remain strictly below the 150 ppm (0.015%) limit mandated by ASTM standards.
Every shipment from Almerca Titanium Industry Co., Ltd. includes an original Material Test Certificate (MTC) according to EN 10204 3.1 (or EN 10204 3.2 third-party inspection certificates from SGS, TÜV, or Lloyd's Register upon request). The certification dossier contains:
- Complete Melt Heat Number traceability to raw titanium sponge.
- Chemical composition analysis (Ti, O, N, C, H, Fe).
- Mechanical properties (Tensile strength, Yield strength, Elongation).
- Hydrostatic and pneumatic leak test records.
- 100% Eddy Current and Ultrasonic NDT inspection verification logs.
- Dimensional tolerance inspection certificates.
Direct Factory Advantage
Why Partner with Almerca Titanium Industry Co., Ltd.?
Whether you are procuring small-diameter hydraulic seamless tubing or large-scale ASTM B338 heat exchanger tube bundles, Almerca Titanium provides direct-factory reliability, certified material quality, and full OEM customization.
60,000 m² Factory Area
Integrated manufacturing footprint with 3 production plants across Shaanxi, China.
300 Tons / Month
Substantial monthly output guaranteeing on-time delivery for high-volume orders.
100+ Advanced Machines
State-of-the-art cold pilger mills, vacuum annealing furnaces, and automated NDT benches.
50+ Export Markets
Trusted supplier to major industrial buyers across North America, Europe, Asia, and the Middle East.
Ready to Request a Quote for Titanium Seamless Tubes?
Get in touch with our senior engineering and sales team today. We provide instant price quotes, material sample testing, custom dimensional evaluations, and complete MTC documentation for your engineering projects.