AMS 4915 Grade R54810 – High-Performance Titanium Alloy for Aerospace Applications

Titanium UNS R54810 is a near Alpha Alloy that was primarily designed for use at elevated temperatures – up to 455 degrees centigrade. It offers the highest modulus and lowest density of all Titanium alloys. It has good creep strength and it’s weldable by the inert gas fusion and resistance-welding processes. Titanium UNS R54810 is used in the annealed condition for such applications as airframe and jet engine parts that demand high strength, superior creep resistance and a good stiffness-to-density ratio. The machinability of this grade is similar to that of Titanium 6Al-4V.

Properties

General

Property	Value	Shape	Related Standards
Density	4.37 g/cm³	Bar, Billet
	4.37 g/cm³		AMS 4915, AMS 4916, AMS 4972, AMS 4973, MIL-T 9046, MIL-T 9047

Dimension

Property	Temperature	Value	Shape	Comment
Diameter		7 mm	Bar
		115 mm	Bar
		130 mm	Billet
		350 mm	Billet
Dimensions	15-65 mm diameter up to 6000 mm length °C	7-14.5 mm diameter up to 3000 mm length	Bar
Length		3000 mm	Billet
		4500 mm	Billet
		6000 mm	Bar	max

Mechanical

Property	Value	Shape	Related Standards
Elastic modulus	117.0 GPa	Bar, Billet
	128 GPa		AMS 4915, AMS 4916, AMS 4972, AMS 4973, MIL-T 9046, MIL-T 9047
Elongation	10.0 %	Bar, Billet
Hardness, Rockwell C	36.0 [-]	Bar, Billet
Impact strength, Charpy notched	20.0 - 34.0 kJ/m²		AMS 4915, AMS 4916, AMS 4972, AMS 4973, MIL-T 9046, MIL-T 9047
Poisson's ratio	0.35 [-]	Bar, Billet
Shear modulus	42.0 GPa	Bar, Billet
Tensile strength	897.0 MPa	Bar, Billet
	931.0 MPa		AMS 4915, AMS 4916, AMS 4972, AMS 4973, MIL-T 9046, MIL-T 9047
Yield strength	827.0 MPa		AMS 4915, AMS 4916, AMS 4972, AMS 4973, MIL-T 9046, MIL-T 9047

Thermal

Property	Temperature	Value	Related Standards	Shape
Coefficient of thermal expansion	20 °C	0.0000085 1/K	AMS 4915, AMS 4916, AMS 4972, AMS 4973, MIL-T 9046, MIL-T 9047
	20 °C	0.0000090 1/K	AMS 4915, AMS 4916, AMS 4972, AMS 4973, MIL-T 9046, MIL-T 9047
	100 °C	0.0000085 1/K	AMS 4915, AMS 4916, AMS 4972, AMS 4973, MIL-T 9046, MIL-T 9047
	315 °C	0.0000090 1/K	AMS 4915, AMS 4916, AMS 4972, AMS 4973, MIL-T 9046, MIL-T 9047
Melting point		1538.0 °C	AMS 4915, AMS 4916, AMS 4972, AMS 4973, MIL-T 9046, MIL-T 9047
Specific heat capacity		502 J/(kg·K)	AMS 4915, AMS 4916, AMS 4972, AMS 4973, MIL-T 9046, MIL-T 9047
Thermal conductivity		6 W/(m·K)	AMS 4915, AMS 4916, AMS 4972, AMS 4973, MIL-T 9046, MIL-T 9047
		6.5 W/(m·K)		Bar, Billet

Electrical

Property	Value	Related Standards
Electrical resistivity	1.9699999999999998e-06 Ω·m	AMS 4915, AMS 4916, AMS 4972, AMS 4973, MIL-T 9046, MIL-T 9047

Chemical properties

Property	Value	Shape	Related Standards
Aluminium	7.35 - 8.35 %	Bar, Billet
	7.5 - 8.5 %		AMS 4915, AMS 4916, AMS 4972, AMS 4973, MIL-T 9046, MIL-T 9047
Carbon	0.08	Bar, Billet	AMS 4915, AMS 4916, AMS 4972, AMS 4973, MIL-T 9046, MIL-T 9047
Hydrogen	0.0125	Bar, Billet	AMS 4915, AMS 4916, AMS 4972, AMS 4973, MIL-T 9046, MIL-T 9047
Iron	0.3	Bar, Billet
Molybdenum	0.75 - 1.25 %	Bar, Billet
	0.75 - 1.75 %		AMS 4915, AMS 4916, AMS 4972, AMS 4973, MIL-T 9046, MIL-T 9047
Nitrogen	0.05	Bar, Billet	AMS 4915, AMS 4916, AMS 4972, AMS 4973, MIL-T 9046, MIL-T 9047
Oxygen	0.12	Bar, Billet	AMS 4915, AMS 4916, AMS 4972, AMS 4973, MIL-T 9046, MIL-T 9047
Vanadium	0.75 - 1.75 %	Bar, Billet	AMS 4915, AMS 4916, AMS 4972, AMS 4973, MIL-T 9046, MIL-T 9047

UNS R56320 Titanium Alloy: Medium Strength & Superior Corrosion Resistance for Aerospace & Industrial Use UGIPERM® 12FM Solution-Annealed Stainless Steel – High Permeability, Low Coercivity

Metal