Titanium Rod Grade 7
Grade 7 titanium rods (titanium-palladium alloy) have excellent corrosion resistance in oxidising media. It also exhibits considerable corrosion resistance in reducing media and is particularly suitable for improving crevice corrosion resistance in media with high chloride ion concentrations.Grade 7 titanium round bars contain 0.2% palladium. In 5% boiling sulphuric acid, the use of Grade 7 titanium-palladium alloys reduces the corrosion rate from 48.26 mm/a (industrially pure titanium) to 0.508 mm/a, an increase in corrosion resistance of approximately 95 times.
Titanium Grade 7 is a titanium-palladium alloy containing:
0.12–0.25% Palladium (the key alloying element)
Balance: Commercially Pure Titanium (similar to Grade 2 chemistry)
Trace elements: Iron, Oxygen, Carbon, Nitrogen, Hydrogen
The addition of palladium-a precious metal-dramatically enhances corrosion resistance, particularly in reducing acid environments where standard titanium might experience attack.
First-class production process for Grade 7 titanium rods
Industry Specifications
| Standard | Description |
|---|---|
| ASTM B348 | Standard Specification for Titanium and Titanium Alloy Bars and Billets |
| ASTM B381 | Standard Specification for Titanium and Titanium Alloy Forgings |
| ASME SB348 | Same as ASTM B348 (ASME Boiler & Pressure Vessel Code) |
| UNS R52400 | Unified Numbering System designation |
| ISO 5832-2 | Implants for surgery (where applicable) |
| AMS 4902 | Aerospace Material Specification |
Mechanical Properties
Grade 7 maintains the excellent mechanical characteristics of Grade 2 titanium:
| Property | Value |
|---|---|
| Tensile Strength (min) | 345 MPa (50 ksi) |
| Yield Strength (min) | 275 MPa (40 ksi) |
| Elongation | 20% minimum |
| Reduction of Area | 30% minimum |
| Hardness (HRB) | ~80 |
| Modulus of Elasticity | 103 GPa (15 × 10⁶ psi) |
Physical Properties
| Property | Value |
|---|---|
| Density | 4.51 g/cm³ (0.163 lb/in³) |
| Melting Point | 1668°C (3034°F) |
| Thermal Conductivity | 16.4 W/m·K |
| Coefficient of Thermal Expansion | 8.6 µm/m·°C (20-100°C) |
| Electrical Resistivity | 0.55 µΩ·m |
Available Specifications for Grade 7 Titanium Rods
We supply Grade 7 titanium rods in the following range:
| Parameter | Available Options |
|---|---|
| Diameter | 1.0 mm – 300 mm (0.04" – 12") |
| Length | Custom cut (standard: 2500 mm / 3000 mm / 6000 mm) |
| Tolerance | h6, h7, h8, h9 (as specified) |
| Condition | Annealed (most common), Hot Rolled, Cold Finished |
| Surface Finish | Turned, Ground, Polished, Pickled |
| Straightness | ≤ 0.5 mm per 1000 mm (customizable) |
| Testing | 100% Ultrasonic (optional), Dimensional, Mechanical |
Grade 7 titanium alloys have excellent machining, forming and welding properties. Since Grade 7 titanium industrial rods are made from pure titanium with a small amount of the precious metal Pd, the alloy produces excellent corrosion resistance to acidic media. However, the cost of Grade 7 titanium alloys is relatively high due to the presence of the precious metal palladium.
Comparison: Grade 7 vs. Other Corrosion-Resistant Materials
| Material | Cost | Weldability | Strength | Weight |
|---|---|---|---|---|
| Grade 7 Titanium | High | Excellent | Moderate | Light |
| Grade 2 Titanium | Moderate | Excellent | Moderate | Light |
| Grade 12 Titanium | Moderate | Good | Moderate | Light |
| Hastelloy C-276 | Very High | Good | High | Heavy |
| Zirconium 702 | Very High | Good | Moderate | Heavy |
| 316L Stainless | Low | Excellent | Moderate | Heavy |
| Super Duplex | Moderate | Good | High | Heavy |
Packaging of Grade 7 titanium rods
Our GR7 titanium rods are protected by a multi-layer packaging system designed to ensure they arrive in perfect condition. Each rod is first wrapped in a layer of soft craft paper or foam to prevent surface scratches, followed by a moisture-proof polyethylene film or vacuum-sealed plastic to guard against oxidation during transit. The rods are then securely bundled with heavy-duty strapping bands, protected by reinforced edge protectors, and packed into sturdy wooden crates or steel-framed export pallets. Every package is clearly labeled with detailed specifications including grade, heat number, dimensions, and weight, ensuring full traceability and safe handling during sea or air freight.
Why choose our Grade 7 industrial titanium rods?
Our Service
1. we can reply your questions within 24 hours (including holidays).
2. 16 years experience in CNC machining.
3. OEM, ODM are welcome, all products can be customized.
4. Protect your personal design and all private information.
5. Provide samples.
6. Welcome to visit.
7. After-sales service.
8. After production and delivery, we will follow up and inform you about your goods in time.
9. After the goods arrive, if you find any design and quality problem or difference with your samples, please feel free to contact us, we will find the problem and solve it with you.
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