Titanium Grade 7 is a palladium-stabilized commercially pure titanium that offers mechanical and physical properties identical to Grade 2, but with significantly enhanced corrosion resistance. The strategic addition of 0.12-0.25% palladium provides exceptional resistance to reducing acids and crevice corrosion in chloride environments. This grade is the material of choice for chemical processing equipment, desalination plants, and electrochemical applications where maximum corrosion resistance is required .
1. Product Specifications & Physical DataZYTC Alloy supplies UNS R52400 in comprehensive mill forms for chemical processing, marine, and industrial applications requiring verified corrosion resistance and complete material traceability. Available Forms: Bar, billet, forging stock, plate, sheet, strip, pipe, tube (extruded), and wire . Specifications: ASTM B265 (sheet/plate), B348 (bar/billet), B337/B338 (pipe/tube), B363 (fittings), B381 (forgings), ASME SB-265/338/348/381, UNS R52400 .
| Chemical Composition (Weight %) | Titanium Grade 7 Specification |
|---|
| Titanium (Ti) | Balance | | Palladium (Pd) | 0.12 - 0.25 | | Iron (Fe) | 0.30 max. | | Oxygen (O) | 0.25 max. | | Carbon (C) | 0.08 max. | | Nitrogen (N) | 0.03 max. | | Hydrogen (H) | 0.015 max. | | Other, total | 0.40 max. |
| Physical Properties | Metric | Imperial |
|---|
| Density | 4.51 g/cm³ | 0.162 lb/in³ | | Beta Transus | 913°C ± 15°C | 1675°F ± 25°F | | Modulus of Elasticity | 103 - 105 GPa | 14.9 - 15.2 × 10⁶ psi | | Thermal Conductivity (RT) | 16.4 W/m·K | 114 BTU·in/hr·ft²·°F |
| Mechanical Properties (Annealed) | Metric | Imperial |
|---|
| Tensile Strength (min.) | 485 MPa | 70,000 psi | | Yield Strength (0.2% offset, min.) | 345 MPa | 50,000 psi | | Elongation (min.) | 28% | 28% | | Reduction of Area (min.) | 30% | 30% | | Hardness (HV) | 150 | 150 |
2. Fabrication & Material ComparisonTitanium Grade 7 offers identical fabricability to Grade 2, with the same processing parameters. Annealing: 650-760°C (1200-1400°F) × 6 min - 2 hours, air cool; full softening after cold work . Stress Relieving: 480-595°C (896-1103°F) × 15 min - 4 hours, air cool; relieves cold work stresses . Hot Working: 843-899°C (1550-1650°F); avoid overheating above beta transus (913°C) . Cold Working: Similar to Grade 2; work-hardening rate moderate. Post-work annealing recommended to restore ductility . Machining: Same as Grade 2; requires sharp tools, positive rake angles, and generous coolant flow . Welding: Excellent weldability; single-phase alpha structure unaffected by welding. Must be shielded with inert gas to prevent contamination. GTAW (TIG) with matching filler metal recommended . Material Comparison: vs. Titanium Grade 2: Identical mechanical properties but significantly superior corrosion resistance in reducing acids and crevice environments; higher cost justified by extended service life . vs. Titanium Grade 12: Grade 7 offers better reducing acid resistance; Grade 12 selected for higher strength applications . vs. 316L Stainless: Half the density, superior corrosion resistance in chlorides; immune to chloride stress corrosion cracking .
3. ApplicationsElectrochemical: Anode and cathode components, cell hardware, electrolytic cells Chemical Processing: Reactor vessels, heat exchangers, piping systems, pumps, valves for hydrochloric, sulfuric, and phosphoric acid service Air Pollution Control: Wet scrubbers, ducting, stack liners Pulp & Paper: Bleaching equipment, washer drums, piping for chlorine dioxide service Hydrometallurgy: Extraction vessels, electrowinning cells, leaching tanks Desalination: Brine heaters, evaporators, heat exchanger tubing Marine: Seawater piping, heat exchangers, offshore platform components Waste Treatment: Hazardous waste processing equipment
Contact ZYTC Alloy for certified Titanium Grade 7 materials with complete traceability, ASTM specifications, technical datasheets, and competitive pricing on standard sizes or custom-fabricated components. Email: daisy@zytcsteel.com WhatsApp/WeChat: +86 17335753350 |
