AMS 4911 Ti-6Al-4V(UNS R56400) Titanium Sheet

AMS 4911 is a detailed standard in the American Aviation Materials Code specifically for hot-rolled titanium Ti-6Al-4V (UNSR56400) sheets. This standard is more demanding than ASTM B265 and is specifically designed for high-performance fields such as aerospace. Its product manufacturing process, annealing process requirements and tolerance requirements have high standards. Ti-6Al-4V is the nominal chemical composition representation method of titanium alloy, which combines lightweight, high strength and excellent corrosion resistance, and is frequently used in aviation, medical, marine, handicrafts and other industries. Its density is about 4.43g/cm³, which is much lighter than steel. Tensile strength is about 900MPa, yield strength is about 830MPa, elongation is 14-20%, chemical composition includes titanium ≥89%, aluminum 6±1%, vanadium 4±1%.

 

 

Chemical Elements	Ti-Remainder,Al 5.5-6.75%,V 3.5-4.5%,Fe≤0.3%,O≤0.2%,C≤0.08%, N≤0.05%,H≤0.015%
Mechanical properties	Tensile strength ≥895Mpa, yield strength ≥827Mpa, elongation ≥10%,Section shrinkage ≥ 25%
Physical properties	Density: 4.43 g/cm³, Melting point: 1600~1660 °C
standard	AMS 4911
size	Thickness: 0.5mm ~ 100mm, Width: ≤1500mm, Length: Customizable
Surface state	Pickling surface, sandblasting surface, polished surface

 

 

1.Material properties 

This material is a α-β titanium alloy with a thermal conductivity of 6.7 W/m·K (lower than aluminum with poor heat dissipation performance), showing a very high strength-to-weight ratio, making it extremely suitable for aviation applications. The material is also highly resistant to corrosion, effectively resisting acidic substances in the air.

After annealing treatment, Ti-6Al-4V forms a typical α + β duplex structure, where α phase is Al and β phase is V.

α phase: Hexagonal close-packed structure (HCP), possessing excellent toughness.

β phase: Body-centered cubic structure (BCC), which can improve processing performance and strength.

 

 

2.Main application areas

 

AMS 4911 Ti-6Al-4V(UNS R56400) Titanium Sheet is designed specifically for aviation equipment, used in the production of aircraft structural components, fuselage skin, fasteners, engine casings, and fasteners. With its excellent strength-to-weight ratio, it is also an ideal material for manufacturing engine nacelle forgings and compressor casings.

Aerospace industry: Due to its high specific strength and lightweight characteristics, it is widely used in the manufacture of components for aircraft and spacecraft.

In the medical field: As a "biocompatible metal", it has good biocompatibility and is used to manufacture artificial joints, bone plates, dental implants and other medical devices.

Chemical and petroleum industries: Its excellent corrosion resistance makes it suitable for manufacturing equipment such as pumps, valves, and pipelines used in corrosive environments.

Marine engineering: Its resistance to seawater corrosion gives it an advantage in marine applications such as hull components and diving equipment.

Sports and leisure products: Due to their high strength, light weight and durability, they are used to manufacture high-performance bicycle frames, golf clubs and other sports equipment.

Automotive industry: In the fields of racing and high-performance cars, it can be used to manufacture engine parts and chassis structural components to reduce weight and improve performance.

 

 

Aerospace industry: Due to its high specific strength and lightweight characteristics, it is widely used in the manufacture of components for aircraft and spacecraft.

In the medical field: As a "biocompatible metal", it has good biocompatibility and is used to manufacture artificial joints, bone plates, dental implants and other medical devices.

Chemical and petroleum industries: Its excellent corrosion resistance makes it suitable for manufacturing equipment such as pumps, valves, and pipelines used in corrosive environments.

Marine engineering: Its resistance to seawater corrosion gives it an advantage in marine applications such as hull components and diving equipment.

Sports and leisure products: Due to their high strength, light weight and durability, they are used to manufacture high-performance bicycle frames, golf clubs and other sports equipment.

Automotive industry: In the fields of racing and high-performance cars, it can be used to manufacture engine parts and chassis structural components to reduce weight and improve performance.

 

 

Q1:What is AMS 4911? How is it different from ordinary titanium plates?

A1:AMS 4911, as the standard for aerospace-grade Ti-6Al-4V (Grade 5) titanium alloy sheet, has more stringent mechanical performance requirements and stricter composition and quality control compared to the industrial-grade ASTM B265 Gr5. Therefore, it is more suitable for fields with extremely high reliability requirements, such as aerospace.
 

Q2:Does AMS 4911 require nondestructive testing?
A2：According to the AMS 4911 standard, titanium alloy sheets with a thickness of less than 6 mm can be visually inspected for cracks, while products with a thickness of more than 6 mm must be tested with ultrasonic waves to ensure the defect detection rate, meeting the stringent reliability requirements of aerospace-grade materials.

Q3:Can AMS 4911 be heat treated and re-strengthened?
A3：Although the AMS 4911 standard delivers the material in the annealed state by default, increased strength can be achieved through solution treatment followed by aging. This process requires precise control over microstructure evolution and residual stress from heat treatment to ensure performance meets aerospace application requirements.

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