Titanium Alloy Welding Wire
AMS 4951 is a SAE Aerospace Material Specification for commercially pure titanium (Grade 2) welding wire. It is primarily used for GTAW (TIG) and GMAW (MIG) welding processes.
This welding wire provides good corrosion resistance, moderate strength, and excellent weldability, making it suitable for welding commercially pure titanium components, such as tubing, plates, and pressure vessels.
Key Features
|
Property |
Details |
|
Material |
Titanium, Grade 2, unalloyed |
|
Form |
Welding wire (spooled or straight length) |
|
Processes |
TIG (GTAW), MIG (GMAW), plasma arc |
|
Condition |
As drawn or cleaned wire, suitable for direct welding |
Chemical Composition (Typical Max Limits)
|
Element |
Content (%) |
|
Titanium |
Balance |
|
Oxygen |
≤ 0.25 |
|
Iron |
≤ 0.30 |
|
Carbon |
≤ 0.08 |
|
Nitrogen |
≤ 0.03 |
|
Hydrogen |
≤ 0.015 |
Conforms to Grade 2 CP Titanium chemistry.
Typical Mechanical Properties of Weld Metal
|
Property |
Value (Approx.) |
|
Tensile Strength |
≥ 345 MPa (50 ksi) |
|
Yield Strength |
≥ 275 MPa (40 ksi) |
|
Elongation |
≥ 20% |
|
Hardness |
~70–80 HRB |
|
Density |
~4.51 g/cm³ |
Standard Sizes
|
Diameter (inches) |
Typical Use |
|
0.030" (0.8 mm) |
Thin sheet welding (TIG) |
|
0.035" (0.9 mm) |
Light tubing |
|
0.045" (1.1 mm) |
Standard TIG applications |
|
1/16" (1.6 mm) |
General purpose TIG/MIG |
|
3/32" (2.4 mm) |
Thicker sections |
Available in coils/spools or cut straight lengths.
Welding Considerations
Use 100% argon shielding gas (or argon/helium mix)
Shield both the front and backside of weld to prevent oxidation
Clean wire and base metal before welding to remove contaminants
Avoid high interpass temperatures
Applications
AMS 4951 welding wire is used in:
Aerospace structures
Chemical processing equipment
Marine applications
Heat exchangers
Piping systems
Titanium pressure vessels and tanks
AMS 4952 CP Titanium Grade 3 welding wire
AMS 4953 CP Titanium Grade 4 welding wire
AWS A5.16 Specification for Titanium Filler Metals
ASTM B863 Titanium wire, including welding wire
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