Grade 3 Titanium is an unalloyed commercially pure titanium offering higher strength than Grades 1 and 2, while maintaining excellent corrosion resistance and good weldability. With density 4.51 g/cm³ (60% of steel), it provides enhanced mechanical properties for applications requiring moderate strength combined with the corrosion resistance inherent to commercially pure titanium. This grade is specified for chemical processing equipment, marine components, and airframe parts operating up to 204°C (400°F) .
1. Product Specifications & Physical DataZYTC Alloy supplies UNS R50550 in comprehensive mill forms for industrial, marine, aerospace, and chemical processing applications requiring verified mechanical properties and complete material traceability. Available Forms: Bar, fittings, flanges, forgings, pipe, plate, sheet, strip, tube, welding wire, and wire . Specifications: ASTM B265 (sheet/plate), B348 (bar/billet), B381 (forgings), B337/B338 (pipe/tube), B363 (fittings), ASME SB-265/338/348/381, AMS 4900/4901 .
| Chemical Composition (Weight %) | Grade 3 Titanium Specification |
|---|
| Titanium (Ti) | ≥ 98.8 | | Iron (Fe) | ≤ 0.30 | | Oxygen (O) | ≤ 0.35 | | Carbon (C) | ≤ 0.080 | | Nitrogen (N) | ≤ 0.050 | | Hydrogen (H) | ≤ 0.015 |
| Physical Properties | Metric | Imperial |
|---|
| Density | 4.51 g/cm³ | 0.163 lb/in³ | | Melting Point | 1650 - 1680°C | 3000 - 3056°F | | Beta Transus | 920°C ± 15°C | 1688°F ± 25°F | | Modulus of Elasticity | 105 - 115 GPa | 15.2 - 16.7 × 10⁶ psi | | Poisson's Ratio | 0.34 - 0.40 | 0.34 - 0.40 | | Thermal Conductivity (RT) | 16.4 W/m·K | 114 BTU·in/hr·ft²·°F |
| Mechanical Properties (Annealed) | Metric | Imperial |
|---|
| Tensile Strength (min.) | 450 - 585 MPa | 65 - 85 ksi | | Yield Strength (0.2% offset, min.) | 380 - 485 MPa | 55 - 70 ksi | | Elongation (min.) | 20 - 25% | 20 - 25% | | Reduction of Area (min.) | 30% | 30% | | Hardness (HV) | 180-220 | 180-220 |
2. Fabrication & Material ComparisonGrade 3 titanium requires more powerful equipment for forming than lower-strength grades, but remains readily fabricable with proper techniques. Annealing: 650-760°C (1200-1400°F) × 10-30 minutes, air cool; full softening after cold work . Stress Relieving: 482-538°C (900-1000°F) × 45 minutes, air cool; relieves cold work stresses . Hot Working: 843-907°C (1550-1665°F); avoid overheating above beta transus (920°C) to prevent grain growth . Cold Working: Comparable to tempered austenitic stainless steel; work-hardening rate moderate. Post-work annealing recommended to restore ductility and corrosion resistance . Machining: Similar to Grade 2 but with higher cutting forces; requires sharp tools, positive rake angles, and generous coolant flow . Welding: Must be shielded with inert gas (argon or helium) to prevent oxygen/nitrogen contamination. GTAW (TIG) and GMAW (MIG) with matching filler metal (ERTi-3) recommended . Material Comparison: vs. Grade 2 Titanium: Higher strength (380-485 MPa vs. 345 MPa yield); selected where Grade 2 strength insufficient . vs. Grade 4 Titanium: Lower strength than Grade 4 (380-485 MPa vs. 480-550 MPa); intermediate option between Grade 2 and Grade 4 . vs. Grade 5 (Ti-6Al-4V): Significantly lower strength than alloyed titanium; selected where corrosion resistance, not maximum strength, is primary requirement . vs. 304L Stainless: Half the density, superior chloride corrosion resistance; comparable strength at lower weight .
3. ApplicationsChemical Processing: Reactor vessels, heat exchangers, piping systems, pumps, valves for corrosive service Marine: Ship components, offshore platform hardware, seawater piping Aerospace: Airframe components, structural parts requiring moderate strength Oil & Gas: Production equipment, downhole components, piping systems Architectural: Structural components, cladding, fasteners Automotive: Performance parts, exhaust components General Engineering: Industrial components requiring corrosion resistance and moderate strength Power Generation: Condenser tubing, cooling system components
Contact ZYTC Alloy for certified Grade 3 Titanium materials with complete traceability, ASTM/AMS specifications, technical datasheets, and competitive pricing on standard sizes or custom-fabricated components. Email: daisy@zytcsteel.com WhatsApp/WeChat: +86 17335753350 |
