Grade 2 Titanium Plate for Marine and Offshore Engineering
ASTM B265 • AMS 4902 • NORSOK M 650 • DNV / ABS 3.1 MTC
Size & Lead Time at a Glance
Thickness 3 – 100 mm, width up to 2500 mm, length up to 6000 mm.
Stock 3 – 60 mm: cut & ship within 1 2 weeks.
Extra thick/wide rolled to order: 4 10 weeks.
HR P or CR B finish, Ra ≤ 0.4 µm; ASTM B265 Table 4 tolerances, tightenable to ±0.3 mm.
Mechanical (Annealed, ASTM B265/AMS 4902)
| Property | Metric | Imperial |
|---|---|---|
| Tensile Strength ≥ | 345 MPa | 50 ksi |
| Yield Strength ≥ | 275 MPa | 40 ksi |
| Elongation ≥ | 20 % | - |
| Hardness (typ.) | ≈ 145 HB | - |
| Elastic Modulus E | 105 GPa | 15.2 × 10⁶ psi |
| Density ρ | 4.51 g cm⁻³ | 0.163 lb in⁻³ |
Chemistry (Wt %, ASTM B265 Gr 2)
| Element | Maximum |
|---|---|
| C | 0.08 |
| O | 0.25 |
| N | 0.03 |
| H | 0.015 |
| Fe | 0.3 |
| Others single | 0.1 |
| Total | 0.4 |
| Ti | Balance Ti |
Certifications & Traceability
ASTM B265 | AMS 4902 | NORSOK M 650 Rev 4 | NACE MR0175 | DNV/ABS/BV 3.1 MTC | ISO 9001 & 14001
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Fabrication Guidelines
- Welding: GTAW/PAW, heat input ≤ 15 kJ cm⁻¹, 99.99 % Ar backing
- Cold bending: r ≥ 1 t
- Hot forming: 600–800 °C, water quench
- Cutting: Water jet preferred; plasma ≤ 70 A plus acid pickling
Typical Marine Applications
- RO desalination heat exchanger plates
- FPSO tank cladding – 40 % weight saving
- Offshore wind jacket stiffeners – 25 year design life
- Deep sea research hulls – withstand 400 bar
Pricing & Lead Time Snapshot (Q3 2025)
| Qty | FOB Tianjin (USD / kg) | Lead‑time |
|---|---|---|
| 10 t | 15.8 - 17.5 | 3 weeks |
| 50 t | 14.2 - 15.0 | 6 weeks |
| 100 t | 13.6 - 14.2 | 8 weeks |
Why Grade 2 Beats Super Duplex & 6 Mo
| Metric | Gr 2 (CP‑Ti) | Super Duplex 2507 | 6 Mo (UNS N08367) |
|---|---|---|---|
| Density ρ (g cm⁻³) | 4.51 | 7.8 | 8.1 |
| 3 % NaCl Pitting | No attack 96 h | Local pitting | Local pitting |
| Cl⁻ SCC | Immune | < 70 °C | < 60 °C |
| Initial material cost* | 1.4 | 1 | 1.6 |
| Life‑cycle cost | 0.83 | 1 | 1.24 |
