ASTM B338 Titanium Tube Stock Sizes & Specifications
May 22, 2026
GNEE maintains inventory of ASTM B338 titanium tubes in multiple grades and common sizes. Stock items are ready for immediate shipment. Custom sizes available upon request.
Stock Titanium Tube – Available Specifications
| Parameter | Details |
|---|---|
| Standards | ASTM B338 / ASME SB338 (Heat exchanger tubes) |
| ASTM B861 / ASME SB861 (Seamless pipe) | |
| ASTM B862 / ASME SB862 (Welded pipe) | |
| Grades in Stock | Gr.1 (UNS R50250), Gr.2 (UNS R50400), Gr.7 (UNS R52400), Gr.9 (UNS R56320), Gr.12 (UNS R53400) |
| Type | Seamless / Welded (TIG) |
| Surface Finish | AP (Annealed & Pickled) / BA (Bright Annealed) |
| End Finish | Plain End / Beveled End with plastic caps |
Stock Sizes – Ready to Ship (OD x Wall Thickness)
| OD (mm) | OD (inch) | Wall Thickness (mm) | Available Grades | Type |
|---|---|---|---|---|
| 12.7 | 1/2" | 0.7 / 0.9 / 1.0 / 1.2 | Gr.1 / Gr.2 | Seamless / Welded |
| 15.9 | 5/8" | 0.7 / 0.9 / 1.0 / 1.2 | Gr.1 / Gr.2 | Seamless / Welded |
| 19.0 | 3/4" | 0.7 / 0.9 / 1.0 / 1.2 / 1.5 | Gr.1 / Gr.2 | Seamless / Welded |
| 25.4 | 1" | 0.7 / 0.9 / 1.0 / 1.2 / 1.5 | Gr.1 / Gr.2 / Gr.7 | Seamless / Welded |
| 31.8 | 1-1/4" | 0.9 / 1.0 / 1.2 / 1.5 | Gr.1 / Gr.2 | Seamless |
| 38.1 | 1-1/2" | 1.0 / 1.2 / 1.5 | Gr.1 / Gr.2 | Seamless |
| 50.8 | 2" | 1.0 / 1.2 / 1.5 / 2.0 | Gr.1 / Gr.2 / Gr.9 | Seamless |
Thin wall options (0.5 – 0.7 mm) for heat exchanger tubes are available upon request.
Custom Sizes
| Parameter | Custom Range |
|---|---|
| OD | Seamless: 1.0 mm – 508 mm / Welded: 6.0 mm – 1219 mm |
| Wall Thickness | 0.3 mm – 50 mm |
| Length | 3 m – 30 m |
| Shape | Round / Square / Rectangular / U-bent / Coiled |
Lead time for custom sizes: 15-25 days depending on quantity.
Submit Your Custom Requirements
Titanium Grade Selection Guide
| Grade | UNS | Key Properties | Best For |
|---|---|---|---|
| Gr.1 | R50250 | Softest, highest ductility (24% elongation), best formability | U-bending, deep drawing, seawater heat exchangers |
| Gr.2 | R50400 | Higher strength (275 MPa yield), good formability (20% elongation) | General purpose, industrial piping, condensers |
| Gr.7 | R52400 | Gr.2 + 0.12-0.25% palladium, superior crevice corrosion resistance | Stagnant seawater, high chlorides, reducing acids |
| Gr.9 | R56320 | High strength (Ti-3Al-2.5V), good weldability | Aerospace hydraulics, high-pressure tubing |
| Gr.12 | R53400 | Medium strength (Ti-0.3Mo-0.8Ni), improved corrosion resistance | Shell & tube heat exchangers, chemical processing |
By Application
| If your application involves... | Recommended Grade |
|---|---|
| U-bent heat exchanger tubes | Gr.1 (best formability) |
| Straight tubes, general seawater cooling | Gr.1 or Gr.2 |
| Stagnant seawater or crevice risk | Gr.7 (palladium grade) |
| High pressure hydraulic systems | Gr.9 |
| Chemical processing with mild acids | Gr.12 |
By Property
| If you need... | Choose this grade |
|---|---|
| Highest ductility (bending, forming) | Gr.1 |
| Highest strength among CP grades | Gr.2 |
| Best crevice corrosion resistance | Gr.7 |
| Highest overall strength | Gr.9 |
| Balanced strength & corrosion | Gr.12 |
Price Reference (May 2026) – FOB China
Prices are for reference only. Final price depends on size, quantity, grade, and current raw material market.
| Grade | Approximate Price (USD/kg) | Notes |
|---|---|---|
| Gr.1 | $28 – 35 | Most common, best formability |
| Gr.2 | $28 – 35 | Similar to Gr.1 |
| Gr.7 | $45 – 60 | Palladium added, higher cost |
| Gr.9 | $50 – 70 | Alloy grade, higher strength |
| Gr.12 | $40 – 55 | Molybdenum-nickel alloy |
Prices are negotiable for bulk orders (1 ton+). Contact us for current pricing.
Inventory & Lead Time
| Category | Availability | Lead Time |
|---|---|---|
| Stock sizes (see table above) | ✅ In stock | 3-7 days |
| Custom sizes (standard grades) | 🟡 Make to order | 15-20 days |
| Gr.7 / Gr.9 / Gr.12 (any size) | 🟡 Make to order | 20-25 days |
| U-bent tubes (to drawing) | 🟡 Make to order | 20-25 days |
Quality Assurance
| Test | Coverage | Standard |
|---|---|---|
| Chemical Analysis | Per heat | ASTM E1409, E1447 |
| Tensile Test | Per heat | ASTM E8/E8M |
| Flattening Test | Per ASTM B338 | - |
| Flaring Test | Per ASTM B338 | - |
| Ultrasonic Test (UT) | 100% (seamless) | ASTM E213 |
| Eddy Current Test (ECT) | 100% (welded) | ASTM B338 |
| Hydrostatic Test | 100% | ASTM B338 |
| PMI Test | 100% | Positive Material Identification |
Packaging
Each tube is individually wrapped in plastic film with plastic end caps, bundled with steel straps and protective padding, then packed in plywood wooden boxes for seaworthy export. Labels include grade, heat number, size, and quantity.
FAQ
1. What is the most popular titanium grade for seawater heat exchangers?
Gr.1 is the most popular due to its 24% elongation for U-bending and excellent seawater corrosion resistance. Gr.2 is also used for straight tubes.
2. Do you have Gr.1 titanium tube in stock?
Yes. Common sizes from 12.7mm to 50.8mm OD with wall thickness 0.7-1.5mm are in stock and ready to ship.
3. What is the difference between Gr.1 and Gr.2?
Gr.1 has lower yield strength (170 MPa vs 275 MPa) but higher elongation (24% vs 20%). Choose Gr.1 for bending; choose Gr.2 for higher pressure.
4. When should I choose Gr.7 instead of Gr.1?
Choose Gr.7 when the tube will be in stagnant seawater or has crevice risk (e.g., tube-to-tubesheet joints). The palladium addition provides superior crevice corrosion resistance.
5. Can you supply U-bent titanium tubes?
Yes. We can bend Gr.1 titanium tube to your drawing. Minimum bending radius depends on OD/wall ratio.
6. What is your MOQ for stock sizes?
No MOQ for stock sizes. You can order any quantity.
7. Do you provide free samples?
Yes. Free samples (200-300mm length) are available. You pay only shipping cost.
8. What is your delivery time for stock items?
3-7 days after payment confirmation for stock sizes.
9. Do you accept SGS inspection?
Yes. SGS or any third-party inspection is welcome at buyer's cost.
10. How do I place an order?
Email us with: Grade, OD, wall thickness, length, quantity, and destination port. We will reply with a quote within 24 hours.
