Gr4 Titanium Wire Description
Product Introduction
Gr4 titanium wire (ASTM Grade 4/UNS R50700/TA4) is the highest-strength CP titanium grade. α single-phase structure, non-heat-treatable. UTS≥550 MPa and YS≥483 MPa — significantly higher than Gr1 and Gr2. Combines good ductility with excellent weldability and the same corrosion resistance as other CP titanium grades.
Ideal for high-strength welding, springs, fasteners, and demanding corrosive service conditions. Available from φ0.1 mm to φ6.5 mm, customizable up to φ10.0 mm, as straight wire or coil.
Specifications
1. Basic Information
|
Parameters |
Values |
|
Product Name |
Gr4 Titanium Wire |
|
Grade Equivalents |
ASTM Gr4/UNS R50700/TA4 |
|
Standards |
GB/T 3623-2022, ASTM B863, AMS 4903, JIS H4630, GOST 19807 |
|
Supply Forms |
Straight wire, Coil wire |
|
Surface Conditions |
Pickled, Bright finish |
|
Diameter Range |
φ0.1–φ6.5 mm; customizable up to φ10.0 mm |
|
Straightness |
≤2/1000 |
2. Chemical Composition
|
Ti |
O |
Fe |
C |
N |
H |
Total Impurities |
|
Balance |
≤0.40% |
≤0.50% |
≤0.08% |
≤0.05% |
≤0.015% |
≤0.40% |
3. Mechanical Properties
|
Tempers |
UTS (MPa) |
YS (MPa) |
Elongations (%) |
|
Annealed (M) |
≥550 |
≥483 |
≥15 |
|
Cold-Drawn (Y) |
≥620 |
– |
≥8 |
4. Physical Properties
|
Properties |
Values |
|
Density |
4.51 g/cm³ (56% of steel) |
|
Melting Point |
≈1668°C |
|
Thermal Expansion |
8.6×10⁻⁶/°C |
|
Thermal Conductivity |
17 W/(m·K) |
|
Electrical Resistivity |
≈0.55 μΩ·m |
|
Magnetic |
Non-magnetic (weakly paramagnetic) |
|
Max. Service Temp. |
≤300°C continuous; ≤450°C short-term |
|
Cryogenic Limit |
-253°C (LH₂/LOX)-no embrittlement |
Features and Advantages
- Highest strength in CP titanium: UTS≥550 MPa, YS≥483 MPa-far above Gr1 and Gr2.
- Excellent weldability: Meets ERTi-4 specs, compatible with TIG/MIG welding, low porosity, high joint strength.
- Broad corrosion resistance: Resistant to atmosphere, seawater, salt spray, and weak acids and alkalis.
- Lightweight and non-magnetic: Density 4.51 g/cm³ (56% of steel), suited for precision instruments and weight-critical designs.
- Biocompatible: Non-toxic and non-sensitizing, meets requirements for medical contact components.
- Process-ready: Available in straight wire and large coils, easy to form, compatible with automated production lines.
Performance Solutions
1. Problem: High-strength stainless steel struggles to balance strength and corrosion resistance in aggressive media, leading to stress corrosion cracking.
Solution: Gr4 titanium wire delivers UTS ≥550 MPa alongside excellent corrosion resistance. It is a direct replacement for high-strength stainless steel in demanding corrosive environments.
2. Problem: Gr1 and Gr2 titanium wire lack the strength needed for heavy-duty springs, fasteners, and load-bearing structural components.
Solution: Gr4 offers more than twice the tensile strength of Gr1. It is the highest-strength CP titanium grade, suited for high-strength titanium springs, screws, and structural parts.
3. Problem: Common metal welding wire produces low joint strength and high porosity when welding high-strength titanium equipment, compromising safety.
Solution: Gr4 titanium wire meets ERTi-4 welding wire specifications. Welds are dense with joint strength matching the base material. The standard choice for high-strength titanium equipment and pipeline welding.
4. Problem: Iron-based materials corrode heavily in marine salt spray and high-chloride environments, driving up equipment maintenance costs.
Solution: Gr4 titanium wire outperforms 316L stainless steel in seawater and high-chloride corrosion resistance. Suited for subsea components and desalination equipment.
Applications
- Compliant with ERTi-4 specifications. Used for TIG/MIG welding of high-strength titanium equipment, pipelines, vessels, and heat exchangers. Welds are dense with high joint strength. The standard choice for high-strength titanium fabrication in chemical processing, petrochemical, and nuclear industries.
- Applied in filter screens, electrolytic anodes, work holders, and corrosion-resistant structural parts. In hydrochloric acid, nitric acid, and chloride media, service life is 5-10 times longer than stainless steel.
- Used in high-strength titanium springs, screws, clamps, and structural fasteners. Gr4 delivers the highest strength of any CP titanium grade, meeting high-load requirements while offering corrosion resistance and non-magnetic properties.
- Suited for desalination pipelines, subsea structural components, marine fasteners, and anti-corrosion mesh. Outperforms 316L stainless steel in salt spray and high-chloride environments with lower long-term maintenance costs.
- Used in high-strength non-magnetic springs, sensor frames, precision cables, and shielding components. Non-magnetic properties eliminate interference in sensitive measurements. Diameter tolerance ±0.02 mm supports precision and miniaturized designs.