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| Specification | Value |
|---|---|
| UNS Number | R52400 |
| ASTM/ASME Standard | ASTM F67 / SB-381 |
| Tensile Strength | 485 MPa min |
| Yield Strength | 380 MPa min |
| Density | 4.51 g/cm³ |
| Max Service Temperature | 430°C |
| Element | Composition (%) |
|---|---|
| Ti | balance |
| Pd | 0.12–0.25% |
| O | ≤0.25% |
| N | ≤0.03% |
| C | ≤0.08% |
| Fe | ≤0.30% |
Titanium Grade 7 is a near-identical variant of commercially pure Titanium Grade 2, distinguished by the addition of 0.12–0.25% palladium. This palladium content is the defining alloying element, significantly enhancing resistance to reducing acid environments without altering the mechanical strength or ductility of the base titanium. Trace amounts of iron, oxygen, carbon, nitrogen and hydrogen are tightly controlled to preserve toughness and weldability, ensuring the alloy retains excellent formability while gaining superior corrosion performance compared to standard grades.
Fasteners produced from Grade 7 titanium deliver outstanding corrosion resistance in aggressive chemical processing environments, including hydrochloric and sulfuric acid exposure, making them ideal for chemical plants, marine equipment and pharmaceutical processing. The alloy maintains excellent strength-to-weight ratio, good ductility, and reliable performance across a wide temperature range. Its biocompatibility, resistance to crevice corrosion and long service life under harsh conditions make Grade 7 fasteners a preferred choice for critical applications demanding both mechanical reliability and exceptional chemical resistance.
Specifications
Titanium Grade 7 Fasteners combine excellent corrosion resistance with reliable mechanical strength and precise dimensional control for demanding industrial assemblies. Their specifications cover size, thread, and tolerance requirements, along with key technical data and material properties, meeting applicable industry standards where specified for consistent performance.
| Property | Value |
|---|---|
| Tensile Strength | 485 MPa min |
| Yield Strength (0.2% offset) | 380 MPa min |
| Elongation | 20% min |
| Reduction of Area | 25% min |
| Hardness | 80-100 HRB |
| Modulus of Elasticity | 103 GPa |
| Thermal Expansion (20-100°C) | 8.6 µm/m·°C |
| Thermal Conductivity | 16.4 W/m·K |
| Density | 4.51 g/cm³ |
| Melting Range | 1660-1700°C |
| Maximum Service Temperature | 430°C |
| Parameter | 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 | M3 to M100 / 1/8" to 4" |
| Length Range | 10mm to 500mm |
| Available Product Forms | Bolts, Studs, Nuts, Washers, Screws |
| Custom Sizes | Available on request |
| Manufacturing Standards | ASTM F67, ASME SB-381 |
| Inspection Standards | NACE MR0175, EN 10204 3.1 |
Applications
