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| Property | Value |
|---|---|
| UNS Number | R53400 |
| ASTM/ASME Standard | ASTM B381 / F467 / F468 |
| Tensile Strength | 483 MPa min |
| Yield Strength | 345 MPa min |
| Density | 4.51 g/cm³ |
| Max Service Temperature | 480°C |
| Element | Composition (%) |
|---|---|
| Ti | balance |
| Mo | 0.2–0.4% |
| Ni | 0.6–0.9% |
| O | ≤0.25% |
| N | ≤0.03% |
| C | ≤0.08% |
| Fe | ≤0.30% |
Titanium Grade 12 is alloyed with 0.3% molybdenum and 0.8% nickel, small additions that significantly enhance strength while maintaining excellent weldability and formability compared to commercially pure titanium. These alloying elements refine the microstructure, improving resistance to crevice corrosion and stress corrosion cracking in chloride-rich and reducing environments. The near-alpha structure ensures stability at elevated temperatures without compromising ductility, making the alloy a practical alternative to more expensive titanium grades and stainless steels in demanding applications.
Engineering benefits include superior corrosion resistance in seawater, brine and mildly reducing acidic media, along with excellent strength-to-weight ratio suitable for high-performance fasteners. Its high temperature capability up to 480°C, combined with resistance to hydrogen embrittlement and galvanic corrosion, makes Grade 12 fasteners ideal for marine, chemical processing and aerospace assemblies requiring long-term reliability, reduced maintenance and dependable mechanical performance under cyclic loading conditions.
Specifications
Titanium Grade 12 Fasteners are engineered to deliver reliable mechanical properties, corrosion resistance, and precise dimensional specifications for demanding service conditions. Their technical data typically covers thread sizes, tolerances, tensile performance, and related material requirements, making them suitable for applications where strength and consistency are critical.
| Property | Value |
|---|---|
| Tensile Strength | 483–655 MPa |
| Yield Strength | 345 MPa min |
| Elongation | 18% min |
| Reduction of Area | 35% min |
| Hardness | 235 HB max |
| Modulus of Elasticity | 105 GPa |
| Thermal Expansion | 8.1 µm/m·°C |
| Thermal Conductivity | 7.7 W/m·K |
| Density | 4.51 g/cm³ |
| Melting Range | 1600–1650°C |
| Max Service Temperature | 480°C |
| Standard | Details |
|---|---|
| Bolt Standard | ASME B18.2.1, DIN 931/933 |
| Stud Bolt Standard | ASME B18.31.3 |
| Nut Standard | ASME B18.2.2, DIN 934 |
| Washer Standard | ASME B18.22.1, DIN 125 |
| Thread Form | UNC, UNF, Metric Coarse/Fine |
| Diameter Range | M6 – M64 / 1/4" – 2.5" |
| Length Range | 10mm – 300mm |
| Available Product Forms | Bolts, Studs, Nuts, Washers, Screws |
| Custom Sizes | Available on request |
| Manufacturing Standards | ASTM F467/F468, ISO 3506 |
Applications
