products provided by GNEE
ASTM B338 Alloy Gr7 Titanium Pipe
High-strength Gr 2 Gr 5 Gr 7 Titanium Plate
Typical Applications
Most of the applications of this grade are in the chemical industries. The most common uses are reactor autoclaves, piping and fittings, valves, heat exchangers and condensers.
Chemical Composition
ASTM B338 – Seamless & welded
titanium & titanium alloy tubes for condensers & heat exchangers
| Element | Titanium | Nitrogen | Carbon | Hydrogen | Iron | Oxygen | Palladium | Residuals (each) | Residuals (total) |
| % | Balance | 0.03 max | 0.08 max | 0.015 max | 0.30 max | 0.25 max | 0.12-0.25 | 0.1 max | 0.4 max |
Specified Minimum Mechanical Properties
(ASTM B338 – Seamless & welded titanium & titanium alloy tubes for condensers & heat exchangers)
| 0.2% Proof Stress | Tensile Strength | Elongation | |
| MPa | MPa | % | |
| Annealed | 275-475 | 345 | 20 |
Description
Titanium grade 7 is a corrosion resistant alpha titanium alloy with similar mechanical properties to the commercially pure grades. It has a small palladium addition to improve corrosion resistance, particularly in mineral acids and strong brines. It is used mildly reducing or fluctuating conditions. At room temperature it is an alpha alloy. It transforms to beta phase at 913°C, and the alpha phase returns on cooling 890°C.
Titanium is reactive, with a very high affinity for oxygen, which forms a skin of very stable and highly adherent oxide. The skin gives excellent corrosion resistance, despite the reactivity of the metal. The oxide layer forms spontaneously and on exposure to the atmosphere. However, when new parent metal is exposed to anhydrous conditions or in the absence of air, rapid corrosion may occur. Care should also be taken if titanium is to operate in contact with hydrogen, as hydrogen embrittlement from hydride formation can increase strength, with loss of ductility.
Titanium products provided by GNEE
| Product Form | Common Grades (Typical) | Primary ASTM Standards | Standard Specifications / Dimensions | Available Shapes / Types | Surface Finish |
|---|---|---|---|---|---|
| Titanium Tube | Gr.1, Gr.2, Gr.3, Gr.7, Gr.9, Gr.12, Gr.5 (Ti-6Al-4V) | ASTM B338 | OD: 1mm - 150mm Wall Thickness: 0.5mm - 15mm Length: Up to 15,000mm |
Seamless Tube, Welded Tube, Heat Exchanger Tubes, Condenser Tubes | Pickled, Polished (Mill / Mirror), Annealed, Bright |
| Titanium Bar | Gr.1, Gr.2, Gr.5 (Ti-6Al-4V), Gr.7, Gr.9, Gr.12 | ASTM B348 | Diameter: 3mm - 300mm Length: 3,000mm or custom |
Round Bar, Square Bar, Hexagonal Bar, Wire Rod, Forged Billets | Black (Hot Rolled), Turned, Polished, Centerless Ground, Peeled |
| Titanium Sheet/Plate | Gr.1, Gr.2, Gr.5 (Ti-6Al-4V), Gr.7, Gr.9, Gr.12 | ASTM B265 | Thickness: 0.1mm - 100mm+ Width: Up to 2,000mm Length: Up to 6,000mm |
Sheet (≤ 4.76mm), Plate (> 4.76mm), Coil/Strip, Shim Stock | Hot Rolled, Cold Rolled, Pickled, Sandblasted, Polished, Brushed |
| Titanium Foil | Gr.1, Gr.2 | ASTM B265 | Thickness: 0.03mm - 0.1mm Width: Up to 500mm |
Foil, Strip | Cold Rolled, Annealed, Bright |
| Titanium Wire | Gr.1, Gr.2, Gr.5 (Ti-6Al-4V) | ASTM B863, F67 (for medical) | Diameter: 0.1mm - 8.0mm Form: Coil, Spool, Straight Length |
Welding Wire, Spring Wire, Fastener Wire, Fishing Wire | Pickled, Acid Cleaned, Polished |
| CNC Machined Parts | Gr.2, Gr.5 (Ti-6Al-4V), Gr.9, Gr.12 | ASTM B348 (Bar stock), Custom | Capability: Prototype to Mass Production Tolerance: As per customer drawing |
Flanges, Fittings, Valves, Bolts, Nuts, Custom Components Machined from billet/bar/plate |
As-machined, Sandblasted, Polished, Anodized, Bead Blasted |
