ASTM Grade 2 Titanium (UNS R50400) is an unalloyed titanium grade, often called the “workhorse” of commercially pure titanium due to its versatility, wide availability, and balanced properties. It combines moderate strength with excellent ductility, formability, and weldability, along with high corrosion resistance in oxidizing, neutral, and mildly reducing environments (including chlorides).
Key Trait: Slightly stronger than Grade 1, making it suitable for diverse industrial applications requiring a mix of formability and durability.
Chemical Composition (Weight %)
Component
Content Range
Ti
Min 98.9 (balance)
C
Max 0.08
Fe
Max 0.3
H
Max 0.015
N
Max 0.03
O
Max 0.25
Industry Specifications
Region/Industry
Specifications
USA Aerospace
AMS 4902, 4941
Germany Engineering
3.7035
Germany Aerospace
3.7034
France
T-40
UK Aerospace
BS TA.2, 3, 4, 5
Physical Properties
Property
Metric
English
Comments
Density
4.51 g/cc
0.163 lb/in³
Typical
Electrical Resistivity
5.3e-005 ohm-cm
5.3e-005 ohm-cm
Mechanical Properties
Property
Metric
English
Notes
Tensile Strength (Ultimate)
485 MPa
70,300 psi
Typical
Tensile Strength (Yield, 0.2% Proof)
345 MPa
50,000 psi
Typical
Elongation at Break
28%
28%
Typical
Reduction of Area
57%
57%
Typical
Modulus of Elasticity
105 – 120 GPa
15,200 – 17,400 ksi
Typical
Fatigue Strength (Notched, Kt=3)
154 MPa
22,300 psi
Limit at 10⁷ cycles; rotating bend
Fatigue Strength (Smooth, Kt=1)
232 MPa
33,600 psi
Limit at 10⁷ cycles; rotating bend
Minimum Bend Radius
2.5t
2.5t
For 0.078 in (2 mm) sheet
Thermal Properties
Property
Metric
English
Notes
Linear CTE (20°C)
8.6 μm/m-°C
4.78 μin/in-°F
20–100°C
Linear CTE (250°C)
9.5 μm/m-°C
5.28 μin/in-°F
20–300°C
Linear CTE (500°C)
9.7 μm/m-°C
5.39 μin/in-°F
20–500°C
Thermal Conductivity
21.79 W/m-K
151 BTU-in/hr-ft²-°F
Maximum Service Temp (Air)
425°C (continuous); 540°C (intermittent)
797°F (continuous); 1000°F (intermittent)
Retains properties within range
Beta Transus Temperature
915°C
1680°F
Applications
Widely used across industries for its corrosion resistance and formability:
Chemical processing (valves, fittings, clad plate).
Marine and offshore equipment (resists saltwater corrosion).
