Properties and Characteristics of Titanium Alloy AMS 4911

Know the properties and characteristics of titanium alloy AMS 4911 at FlightMetals like high strength, better hardness, great melting point, etc.

Titanium is one of the best refractory metals with higher strength and lightweight. Titanium and its alloys are widely used in the aerospace industry due to its favourable properties and characteristics. That’s why, 80% of the titanium produced is only used in aerospace applications while the rest of 20% is used in other industries.

Before we move on to explaining specific properties, let’s look at the summary of titanium properties. Ti is atomic symbol of titanium is and atomic number of it is 22. Element category is transition metal, melting point is 3038°F (1670°C) and boiling point is 5949°F (3287°C). Titanium density is 4.506/cm3 and moh's hardness is 6.

Titanium Alloys Strength - In materials mechanics, the material’s strength is ability of it to withstand the applied load without failure or plastic deformation. The strength of material is calculated by considering the relationship between applied load to material and resulting material dimension change or distortion. The ultimate tensile strength of Grade 2 titanium is around 340 MPa while the ultimate tensile strength of Grade 5 titanium alloy is 1170 MPa approx. The yield strength of Grade 2 titanium is around 300 MPa while the yield strength of Grade 5 titanium alloy is 1100 MPa approx.

Titanium Alloys Hardness – The Rockwell hardness of Grade 2 titanium is about 80 HRB while Grade 5 titanium alloy is about 41 HRC. Rockwell test is one of the most common and accurate metal hardness tests that were developed for testing hardness. Rockwell hardness tester measures the penetration depth of an indenter under large load (major load) in contrast to depth of penetration made by preload (minor load). The minor load (preload) form zero position and major load (large load) is applied and then removed while holding the minor load. The difference between penetration depth before and after applying the large load is considered to calculate the Rockwell hardness number. That is, penetration depth and material hardness are inversely proportional. The main benefit of using Rockwell hardness testing is that it shows hardness values directly. The dimensionless result number is notated as HRA, HRB, HRC, etc., in which the last letter is respective Rockwell scale.

Titanium Alloys Melting Point - Melting point of Grade 2 titanium is approximately 1660°C while the melting point of Grade 5 titanium alloy is approximately 1660°C. Melting refers to the physical process that result in substance change from solid to liquid. Melting point is the point at a substance changes from solid to liquid. Melting point is also a state where solids and liquids can exist in equilibrium.

Titanium Alloys Thermal Conductivity - Thermal conductivity of Grade 2 titanium is 16 W/(m. K) while the thermal conductivity of Grade 5 titanium alloy is 6.7 W/(m. K). Thermal conductivity is the property that measures the heat transfer features of any solid material. It calculates the substance’s ability of transferring heat through material via conduction process. AMS 4911 is a nice example of better conductivity titanium alloys.

Conclusion: Titanium alloys are best choice for many aerospace applications due to their favourable properties and characteristics. So, buying titanium alloys for your aerospace application will be great decision. All you have to do is to choose a reliable titanium supplier. FlightMetals is one of the best reliable suppliers of titanium products like AMS 4904, AMS 4965, AMS 4919, AMS 6930, AMS 4911, Titanium 6242 and AMS 6931.