Titanium Grade 2 Coils

Exceptional Seawater Corrosion Resistance: Outstanding resistance to pitting, crevice corrosion, and stress corrosion cracking (SCC) in chloride environments. Titanium is immune to seawater corrosion regardless of velocity, temperature, or fouling conditions.

Superior Chloride Pitting and Crevice Corrosion Resistance: Unlike stainless steels and duplex alloys,Titanium Grade 2 exhibits no pitting or crevice corrosion in seawater and chloride-containing environments up to its maximum service temperature of 260°C (500°F).

Excellent Biofouling Resistance: Titanium Grade 2 naturally resists biofouling and marine growth, reducing maintenance requirements and preserving heat transfer efficiency over time.

Low Density – High Strength-to-Weight Ratio: Density of only 4.51 g/cm³ (approximately 57% of stainless steel and 43% of nickel alloys), providing significant weight savings in heat exchanger and vessel construction.

Excellent Resistance to Erosion and Cavitation: Titanium Grade 2 has excellent resistance to erosion and cavitation damage, making it ideal for high-velocity seawater applications (up to 20 m/s or 65 ft/s).

Excellent Heat Transfer Efficiency: Low thermal conductivity is offset by the ability to use very thin walls due to high strength-to-weight ratio, resulting in competitive overall heat transfer coefficients.

Non-Magnetic and Non-Toxic: Titanium is non-magnetic (suitable for degaussing systems) and biologically inert, making it ideal for food processing and pharmaceutical applications.

Good Weldability: Titanium Grade 2 offers good weldability with matching filler metal. Weld zones retain corrosion resistance comparable to the base metal.

Excellent Formability: Can be cold rolled to precise thicknesses and slit to narrow widths for precision components.

International Certifications: Coils can be certified by ABS, BV, DNV, LR, GL, RINA, CCS, KR, NK for marine and shipbuilding applications, and comply with ASME, PED, and EN standards.

Titanium Grade 2 is commercially pure titanium with controlled oxygen content (0.10–0.25%) providing optimal strength and ductility. The high purity (≥98.9% Ti) and stable passive oxide film provide outstanding corrosion resistance in chloride environments.

Comparison of Seawater Corrosion Resistance:

High-Temperature Tensile Properties (Typical Values):

Maximum Recommended Service Temperatures:

Critical Note: Titanium Grade 2 has excellent resistance to seawater and chloride corrosion up to its maximum service temperature of 260°C (500°F). Above this temperature, titanium is susceptible to accelerated oxidation and embrittlement.

Heat Treatment Condition:

Titanium Grade 2 coils are normally supplied in the annealed condition (heat treated at 650–760°C) followed by air cooling. This heat treatment relieves internal stresses from rolling and restores optimum ductility and corrosion resistance.

Critical Note: Unlike stainless steels, titanium does not require rapid cooling (quenching) after annealing. Air cooling is sufficient and does not affect corrosion resistance. Titanium should not be exposed to hydrogen at elevated temperatures to prevent hydrogen embrittlement.

Delivery Condition:
Coils are normally supplied in annealed and pickled condition, providing a clean, smooth surface and excellent corrosion resistance. Bright annealed (BA) finish is also available for applications requiring ultra-clean surfaces. Upon request, mechanical polished finish can be provided.

Thickness Tolerances (Cold-Rolled – ASTM B265):

Width Tolerances (Cold-Rolled – ASTM B265):

Flatness Tolerances:

Raw Material Selection: High-quality Titanium Grade 2 sponge and slabs from certified mills (VSMPO, ATI, Timet) with certified chemical composition (Ti ≥98.9%, O 0.10-0.25% verification) and traceability.

Reheating: Slabs heated to a controlled temperature (lower than steel due to titanium's reactivity). Titanium requires special handling to prevent contamination.

Hot Rolling: Heated slabs passed through roughing and finishing stands to reduce thickness. Titanium work hardens rapidly.

Annealing: Hot-rolled coils annealed at 650–760°C followed by air cooling to relieve stresses and restore ductility.

Pickling: Removal of oxides using specialized pickling acids optimized for titanium; thorough rinsing required.

Cold Rolling: For thicknesses below 3.0mm, hot-rolled coils further reduced through cold rolling passes.

Cold Rolling Annealing (Optional): Intermediate annealing for cold-rolled coils.

Bright Annealing (Optional): For BA finish, annealing performed in controlled atmosphere (hydrogen) to produce oxide-free bright surface.

Hydrogen Content Analysis: Verifies H ≤ 0.015% to prevent hydrogen embrittlement.

Slitting (Optional): Wide coils cut into narrower strips per customer requirements (20mm to 600mm width).

Inspection & Testing: Dimensional check, PMI, mechanical testing, surface inspection, hydrogen content analysis.

Coiling & Packaging: Coiled to specified ID/OD, wrapped with moisture barrier paper, steel strapped. Non-metallic spacers to prevent contamination.

Chemical Analysis: PMI 100% verification using handheld XRF spectrometer for Ti purity verification.

Hydrogen Content Analysis: Verifies H ≤ 0.015% to prevent hydrogen embrittlement (critical for titanium).

Mechanical Testing: Tensile strength (≥345 MPa), yield strength (≥275 MPa), elongation (≥20%), hardness (≤200 HBW) per ASTM B265.

Dimensional Inspection: Thickness, width, flatness, coil ID/OD using calibrated instruments.

Surface Inspection: Visual check for surface defects, cracks, roll marks, and consistency.

Intergranular Corrosion Test: Upon request.

Third-Party Inspection: SGS, BV, DNV, TUV, LR, ABS available upon customer request.

Marine & Shipbuilding (Seawater Cooling): Seawater-cooled heat exchanger shells, main engine cooling components, auxiliary cooling water vessels, ballast water treatment equipment, fire main system components (ABS/BV/DNV/LR certified).

Desalination Plants: Brine heater shells, brine preheater components, multi-stage flash (MSF) evaporator shells, multi-effect distillation (MED) heat exchanger components, reverse osmosis preheater vessels, energy recovery device housings.

Offshore Platforms: Seawater cooler shells, topside heat exchanger components, subsea cooling system vessels, firewater system equipment.

Power Generation (Coastal): Coastal power plant condenser shells, cooling water heat exchanger components, auxiliary cooler vessels, nuclear power plant seawater systems.

Chemical Processing (Chloride Service): Chlor-alkali heat exchanger shells, brine heater components, wet chlorine service equipment (limited – confirm grade), hypochlorite storage tanks.

Aquaculture: Fish farm heat exchanger shells, seawater heating system components, hatchery temperature control vessels.

HVAC & Refrigeration (Coastal): Seawater-cooled chiller components, coastal air conditioning system parts, marine refrigeration heat exchanger shells.

Pulp & Paper (Bleach Plants): Chlorine dioxide service equipment (limited – confirm grade), sodium chlorate processing vessels.

Wastewater Treatment (Coastal): Brine concentrator shells, evaporator components, zero liquid discharge (ZLD) system vessels.

Food & Beverage (Coastal): Brine cooling system components, seafood processing heat exchanger shells, saltwater system equipment.

Titanium Grade 2 requires careful control to prevent hydrogen embrittlement:

Womic Steel offers precision slitting services for Titanium Grade 2 coils:

Standard Packaging:

Coils wrapped with moisture-proof paper and VCI (Vapor Corrosion Inhibitor) film

Non-metallic spacers to prevent contamination from steel straps

Outer steel strapping (4-8 straps per coil) with protective padding

Wooden pallet or steel skid for coil protection during transport

Plastic edge protectors for slit coils

Clear labeling with grade (Grade 2/UNS R50400), heat number, dimensions, coil weight, and order number

Womic Steel's Shipping Strengths:

Direct cooperation with global shipowners for competitive freight rates

Professional loading and securing teams using non-metallic slings and padded supports prevent coil damage

Efficient document preparation (EN 10204 Type 3.1 MTR, PMI reports, hydrogen content analysis, marine classification certificates) minimizes customs delays

Continuous cargo tracking and after-sales follow-up

1. Why choose Titanium Grade 2 over Super Duplex 2507 for coil applications?
Titanium Grade 2 offers superior resistance to crevice corrosion in stagnant seawater, better performance in high-velocity seawater (up to 20 m/s vs 10 m/s), and complete immunity to chloride attack. Weight is 57% of stainless steel. For long-term submergence in seawater and high-velocity applications, titanium is preferred. For topside seawater cooling where temperature and velocity are controlled, Super Duplex 2507 is more cost-effective.

2. What is the maximum temperature for Titanium Grade 2 coils?
260°C (500°F) for continuous service in seawater/chloride environments. For EPDM seated titanium components, limit to 120°C (248°F).

3. Is Titanium Grade 2 resistant to biofouling?
Yes, titanium naturally resists biofouling and marine growth, reducing maintenance requirements and preserving heat transfer efficiency.

4. Can Titanium Grade 2 coils be used in reducing environments (no oxygen)?
Titanium Grade 2 requires some oxygen to maintain passive film. For reducing environments (no oxygen), consider Grade 7 (Ti-Pd with palladium) which we also supply upon request.

5. Does Titanium Grade 2 require special welding procedures?
Yes, titanium requires strict inert gas shielding (high-purity argon) with back purge to prevent contamination. Weld zones retain corrosion resistance comparable to the base metal when properly welded.

6. How is hydrogen embrittlement prevented in titanium coils?
Titanium Grade 2 coils are manufactured with hydrogen content ≤0.015%. Pickling uses specialized acids with controlled immersion time. No hydrogen-containing atmospheres are used during heat treatment. Hydrogen content analysis reports are available upon request.

7. Are Titanium Grade 2 coils suitable for desalination plants?
Yes, Titanium Grade 2 is the premier material for desalination heat exchanger shells and evaporator components due to its complete immunity to chloride attack.

Exceptional Seawater Corrosion Resistance: Immune to pitting, crevice corrosion, and SCC in seawater – no other material offers this combination

Lightweight: 57% lighter than stainless steel – reduces shipping costs and structural support requirements

Marine Certified: ABS, BV, DNV, LR, GL approvals available for shipbuilding and offshore

Excellent Biofouling Resistance: Natural resistance – no coatings required

High-Velocity Seawater Capable: Handles velocities up to 20 m/s without erosion

Non-Magnetic: Suitable for degaussing systems and sensitive instrumentation

Full Traceability: Heat number on each coil – traceable to original mill certificate

Complete Size Range: Thickness from 0.5mm to 6.0mm – standard and custom sizes

Slitting Services: In-house slitting capability for narrow strips (20mm to 600mm)

Hydrogen Content Controlled: ≤0.015% verified – prevents embrittlement

Global Delivery: Exported to major desalination, marine, and offshore projects worldwide

Tel / WhatsApp:

Victor: +86 15575100681

Jack: +86 18390957568

E-mail: info@womicstainless.com

Website: www.womicsteel.com

Contact Womic Steel today for a competitive quote on Titanium Grade 2 coils. We offer certified quality, marine classification approvals, hydrogen content verification, fast production lead times, and reliable global delivery for your seawater, desalination, and marine projects.

Stock Examples (Cold-Rolled Titanium Grade 2 Coils – Annealed & Pickled – Seawater Service Grade):

Stock Examples (Cold-Rolled Titanium Grade 2 Coils – Bright Annealed – High-Purity Grade):

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