Shaped, Flat, Square, Round, Fine Wire, Plated and Un-plated ASTM B265

Titanium Beta 21S Wire Description

With high strength Titanium Beta 21 S is a heat treatable, metastable titanium alloy developed as an oxidation-resistant, aerospace material and as a matrix for metal-matrix composites. Beta 21S offers the good formability and weldability of a beta alloy, but with greatly improved oxidation resistance and creep strength.


Components where resistance to aircraft hydraulic fluids is required
Metal matrix composites

Chemistry Typical

Titanium: Balance
Molybdenum: 14.0-16.0
Niobium: 2.4-3.2
Aluminum: 2.5-3.5
Silicon: 0.15-0.25
Iron: 0.40 max
Oxygen: 0.11-0.17
Carbon: 0.05 max
Nitrogen: 0.05 max
Hydrogen: 0.015 max
Residuals each 0.10 max, total 0.40 max

Physical Properties

Density: 0.178 lbs/in³, 4.94 g/cm³

Mean Coefficient of Thermal Expansion: in/in/°F (mm/m/°C):
70-212°F (20-100°C): 3.93 x 10 (7.07)

Thermal Conductivity: BTU-in/h-ft-°F (W/m-°K): At 70°F
(21°C): 52.7 (7.6)

Modulus of Elasticity: KSI (MPa)
10.5-12 x 10³ (72-85 x 10³) in tension

Melting Point: 3034°F (1668°C)

Mechanical Properties at Room Temperature

Properties: Annealed (1550°F)

Ultimate Tensile Strength: 155 KSI min (1068 MPa min)
Yield Strength (0.2% offset): 110 KSI min (758 MPa min)
Elongation: 12%

Aged Properties: Typical

Aging Temp/Time: 1000°F / 8 HOURS
Ultimate Tensile Strength: 170 KSI min (1172 MPa min)
Yield Strength (0.2% offset): 160 KSI min (1103 MPa min)
Elongation: 4%

Aging Temp/Time: 1100°F / 8 HOURS
Ultimate Tensile Strength: 150 KSI min (1034 MPa min)
Yield Strength (0.2% offset): 140 KSI min (965 MPa min)
Elongation: 6%

Aging Temp/Time: 1275°F / 8 HOURS
Ultimate Tensile Strength: 125 KSI min (862 MPa min)
Yield Strength (0.2% offset): 115 KSI min (793 MPa min)
Elongation: 10%

Properties Tempered

Titanium Beta 21S can be cold rolled to achieve the temper properties required by specific customers and/or manufacturing requirements. Contact Ulbrich Wire for details.

Additional Properties

Corrosion Resistance

Refer to NACE (National Association of Corrosion Engineers) for recommendations.


Inquire with Ulbrich Wire

Heat Treatment

Titanium Beta 21S can be hardened by aging


For best results refer to: SSINA’s “Welding of Stainless Steels and Other Joining Methods”

Limitation of Liability and Disclaimer of Warranty: In no event will Ulbrich Stainless Steels and Special Metals, Inc., be liable for any damages arising from the use of the information included in this document or that it is suitable for the ‘applications’ noted. We believe the information and data provided to be accurate to the best of our knowledge but, all data is considered typical values only. It is intended for reference and general information and not recommended for specification, design or engineering purposes. Ulbrich assumes no implied or express warranty in regard to the creation or accuracy of the data provided in this document.

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