Titanium Grade 12 (UNS R53400 / 3.7105) is a near-alpha titanium alloy containing 0.3% molybdenum and 0.8% nickel. Unlike commercially pure titanium grades (Grades 1-4), the addition of these alloying elements provides improved strength and enhanced corrosion resistance, particularly in reducing acid environments and hot brine service. While its corrosion resistance is not as exceptional as Grade 7 (palladium-alloyed titanium), Grade 12 offers a significantly more cost-effective alternative, making it the preferred choice for heat exchangers, pressure vessels, and chemical processing equipment where high performance is required at a reasonable cost. 
Standards| Material No. | EN Designation | ASTM | UNS |
|---|
| 3.7105 | Titan Grade 12 | Ti-Grade 12 | R53400 |
Chemical Composition| C (%) | Mo (%) | Ni (≤ %) | N (≤ %) | Ti | Fe (≤ %) | O (%) | H (%) |
|---|
| ≤ 0.08 | 0.20 - 0.40 | 0.60 - 0.90 | ≤ 0.03 | Rest | ≤ 0.30 | ≤ 0.25 | ≤ 0.015 |
Mechanical Properties at 20°C| Hardness HB 30 (≤ HB) | 0.2% Yield Strength Rp (≥ N/mm²) | Tensile Strength Rm (N/mm²) | Elongation A5 (≥ %) | Modulus of Elasticity (kN/mm²) |
|---|
| 170 | 345 | ≥ 480 | 18 | 105 |
Physical Properties at 20°C| Density (g/cm³) | Specific Heat Capacity (J/kg K) | Thermal Conductivity (W/m K) | Electrical Resistivity (Ω mm²/m) |
|---|
| 4.5 | 520 | 22.6 | 0.52 |
Fabrication Guidelines| Process | Guidelines |
|---|
| Machining | Use slow speeds, high coolant flow, and high feed rates. Tungsten carbide tools (C1-C4) or cobalt-based tools recommended. | | Forging | Rough forge at 871°C (1600°F); finish at 788-843°C (1450-1550°F). | | Annealing | 732-816°C (1350-1500°F) × 2 hours, air cool. Stress relieving: 538-649°C (1000-1200°F) × 1 hour. | | Forming | Can be hot or cold formed. Cold working features similar to austenitic stainless steel. | | Welding | Rated as excellent. |
ApplicationsChemical Processing: Heat exchangers, pressure vessels, piping, fittings, pumps, valves Marine & Offshore: Seawater handling equipment, hot brine service Industrial: Containers for medium reducing or variable oxidizing-reducing media General: Components requiring corrosion resistance and higher strength than CP titanium
Contact ZYTC Alloy TodayRequest a quote for Titanium Grade 12 (UNS R53400 / 3.7105 / Ti-0.3Mo-0.8Ni) – Low-Alloy Titanium – Improved Strength & Corrosion Resistance . Please provide: Product form (bar / sheet / plate / pipe / tube / wire / forging) Dimensions required Length or weight required Quantity Destination port Any special certification requirements
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