AMS 4981B Grade R56260 – Premium Heat‑Treatable Titanium Alloy for Aerospace & Marine Applications

Titanium UNS R56260 is an Alpha-Beta Alloy and it’s generally regarded as the workhorse alloy of the titanium industry. The alloy is fully heat-treatable in section sizes up to one inch and is used up to approximately 400°C (750°F). Since it is one of the most commonly used alloys (over 70% of all alloy grades melted are a sub-grade of Ti-6-4,) its uses span many aerospace engine and airframe components. Titanium UNS R56260 is also used in lots of non-aerospace applications such as marine, offshore and power generation industries. This Alpha-Beta Alloy combines good corrosion resistance and strength with weldability and fabricability. The alloy is generally available in bar form and it’s typically used in deep sour well applications. This alloy can be hot or cold formed.

Properties

General

Property	Value	Shape	Related Standards
Density	4.65 g/cm³	Bar, Billet
	4.65 g/cm³		AMS 4981B, MIL-T 9047G

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	114.0 GPa	Bar, Billet
	114 GPa		AMS 4981B, MIL-T 9047G
Elongation	13.0 %	Bar, Billet
Hardness, Brinell	360.0	Bar, Billet
Hardness, Rockwell C	39.0 [-]	Bar, Billet
Hardness, Vickers	376.0	Bar, Billet
Poisson's ratio	0.33 [-]	Bar, Billet
Shear modulus	42.9 GPa	Bar, Billet
Tensile strength	1172.0 MPa		AMS 4981B, MIL-T 9047G
	1210.0 MPa	Bar, Billet
Yield strength	1103.0 MPa		AMS 4981B, MIL-T 9047G
	1120.0 MPa	Bar, Billet

Thermal

Property	Temperature	Value	Related Standards	Shape
Coefficient of thermal expansion	20 °C	0.0000094 1/K	AMS 4981B, MIL-T 9047G
	20 °C	0.0000103 1/K	AMS 4981B, MIL-T 9047G
	20 °C	0.0000104 1/K	AMS 4981B, MIL-T 9047G
	100 °C	0.0000094 1/K	AMS 4981B, MIL-T 9047G
	315 °C	0.0000103 1/K	AMS 4981B, MIL-T 9047G
	538 °C	0.0000104 1/K	AMS 4981B, MIL-T 9047G
Melting point		1593.0 °C	AMS 4981B, MIL-T 9047G
		1595.0 - 1675.0 °C		Bar, Billet
Specific heat capacity		500 J/(kg·K)	AMS 4981B, MIL-T 9047G
Thermal conductivity		7.7 W/(m·K)	AMS 4981B, MIL-T 9047G	Bar, Billet

Electrical

Property	Value	Related Standards
Electrical resistivity	2e-06 Ω·m	AMS 4981B, MIL-T 9047G

Chemical properties

Property	Value	Related Standards	Shape
Aluminium	5.5 - 6.5 %	AMS 4981B, MIL-T 9047G
	6.0 %		Bar, Billet
Carbon	0.04	AMS 4981B, MIL-T 9047G
Hydrogen	0.0125	AMS 4981B, MIL-T 9047G
Iron	0.15	AMS 4981B, MIL-T 9047G
Molybdenum	5.5 - 6.5 %	AMS 4981B, MIL-T 9047G
	6.0 %		Bar, Billet
Nitrogen	0.04	AMS 4981B, MIL-T 9047G
Oxygen	0.5	AMS 4981B, MIL-T 9047G
Tin	1.75 - 2.25 %	AMS 4981B, MIL-T 9047G
	2.0 %		Bar, Billet
Zirconium	3.5 - 4.5 %	AMS 4981B, MIL-T 9047G
	4.0 %		Bar, Billet

DIN 17851 Grade 3.7185 Titanium Billets – Premium Quality & Versatile Applications EN 1652 CuZn40 R340: High-Strength, Low-Conductivity Wrought Copper Alloy

Metal