GR12 Titanium Alloy Wire
What is GR12 Titanium Alloy Wire?
GR12 titanium alloy wire (UNS R53400) is a medium-strength titanium alloy containing 0.3% molybdenum and 0.8% nickel. This specific alloy combination was developed to provide enhanced corrosion resistance in reducing acid environments while maintaining excellent fabricability. The molybdenum and nickel additions act as cathodic activators, promoting passivation and extending the range of environments where titanium remains corrosion-resistant.
ASTM B863 Titanium Gr.12 Wire Specification
Specifications : ASTM B863,GB/T 3623-2007 AWS A5.16
Grade : TA1 TA2 TA3 TC4 GR1 GR2 GR5 GR7 GR9 GR12
Diameter : 0.10 mm to 10.0 mm
Type : Coil Wire, Straight Wire
Condition: Anneal, Cold Drawn & Polished Cold Drawn, Centreless Ground & Polished
Form : Round, Square, Hex (A/F), Rectangle, Forging Etc.
End : Plain End, Beveled End
Key Features
Enhanced Reducing Acid Resistance:
Molybdenum (0.3%) and nickel (0.8%) additions provide superior performance in HCl, H₂SO₄, and H₃PO₄ compared to CP titanium
Cost-Effective Alternative to Grade 7:
Offers corrosion performance approaching Grade 7 without the palladium cost premium – approximately 70-80% of Grade 7 performance at 50-60% of the cost
Higher Strength than CP Grades:
Approximately 40% stronger than Grade 2 (380 MPa vs 275 MPa yield) while maintaining good ductility
Excellent Crevice Corrosion Resistance:
Outperforms CP titanium in chloride crevice environments above 70°C (160°F)
ASTM B863 Gr.12 Titanium Wire Equivalent Grades:
| NAME | WERKSTOFF NR. | UNS |
| Titanium Grade 12 | 3.7105 | R53400 |
Titanium ASTM B863 Gr 12 Wire Chemical Composition and Mechanical properties:
| Grade | C | O | N | H | Fe | N | Mo |
| R53400 | 0.08 max | 0.18 max | 0.6 – 0.9 | 0.015 max | 0.30 max | 0.03 max | 0.2 – 0.3 |
| Grade | Tensile Strength minimum | Yield Strengthminimum | Elongation Amin, % | Elongation Fmin, % | ||
| Gr.12 | ksi | MPa | ksi | MPa | ||
| 70 | 483 | 50 | 345 | 18 | 18 | |
Surface Finishes
| Surface Type | Description | Roughness (Ra) | Typical Application |
|---|---|---|---|
| Pickled | Acid pickled, oxide-free, uniform matte finish | 0.4-0.8 µm | Standard welding wire, general fabrication |
| Cleaned | Chemically cleaned, light oxide removal | 0.3-0.6 µm | General applications |
| Bright Annealed | Vacuum annealed, bright metallic surface | 0.2-0.4 µm | Critical applications, medical, food processing |
| Polished | Mechanically polished | 0.1-0.3 µm | Aesthetic components, clean applications |
| Ground | Centerless ground, precision finish | 0.2-0.5 µm | Precision tolerance requirements |
| Electropolished | Electrochemically polished | 0.1-0.2 µm | Ultra-clean applications, semiconductor |
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