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Titanium Alloy Grade 6 / Ti-5Al-2.5Sn

Technical Data Sheet

Chemical Composition Limits
Weight %	Ti	C	Fe	N	Al	O	Sn	H	Other
Titanium Ti5Al2.5Sn	bal	0.10	0.05	0.05	4.0/6.0	0.20	2.0-3.0	0.020	0.4 total max

Titanium Ti5Al2.5Sn (Grade 6) is a high strength alloy which is most commonly used in airframe and jet engine applications. Titanium Ti5Al2.5Sn (Grade 6) has good weldability, stability and strength at elevated temperatures.

Typical Mechanical Properties

Material	Tensile Strength min		Yield Strength				Elongation (%)
	ksi	Mpa	Min		Max
			ksi	Mpa	Ksi	Mpa
Titanium Ti-5Al-2.5Sn Annealed Sheet	120	830	115	795	-	-	10

Specifications
AMS 4926 Bars, Wire and Rings
AMS 4966 Forgings
ASTM B367 Gr6
UNS R54520
AMS 4909 Sheet, Strip, Plate (EL1 grade)
AMS 4910 Sheet, Strip, Plate
AMS 4924 Bars, Forgings, Ring (EL1 grade)
AMS 4926 Bar, Wire, Ring (Annealed - 110 ksi)
AMS 4966 Forgings
AMS 6900 Bars
AMS-T- 9046 A-1 Sheet, Strip, Plate
AMS-T- 9047 5Al-2.5Sn Bar
AMS-T-9046 A-2 (EL1) Sheet, Strip, Plate
MIL-T-9046J A-1 Sheet, Strip, Plate
MIL-T-9046H Type II Comp A Sheet, Strip, Plate
MIL-T-9046H Type II Comp B Sheet, Strip, Plate
MIL-T-9047G Bar
DTD 5083
TA14 (w/drawn)
TA15 (w/drawn)
TA16 (w/drawn)
TA17 (w/drawn)

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Grade 6 Ti-5Al-2.5Sn Alloy (UNS R54520)

Introduction

Titanium alloys are light weight and have excellent corrosion resistance, very high tensile strength and toughness. These properties remain unaffected to a great extent even at extreme temperatures. The durability of these alloys make them viable for several industries such as aerospace, military, automobile, consumer electronics, and sports equipment.

Grade 6 Ti-5Al-2.5Sn alloy has high service temperature of 480°C (896°F), medium strength, and excellent weldability and fabricability. This alloy has good oxidation resistance and microstructure stability; however it is not heat-treatable.

The following sections will discuss in detail about grade 6 Ti-5Al-2.5Sn alloy.

Chemical Composition

The chemical composition of grade 6 Ti-5Al-2.5Sn alloy is outlined in the following table.

Element	Content (%)
Titanium, Ti	89.85 - 94
Aluminum, Al	4-6
Tin, Sn	2-3
Iron, Fe	≤ 0.50
Oxygen, O	≤ 0.20
Carbon, C	≤ 0.10
Nitrogen, N	≤ 0.030
Hydrogen, H	≤ 0.015
Other, each	≤ 0.050
Other, total	≤ 0.30

Physical Properties

The physical properties of grade 6 Ti-5Al-2.5Sn alloy are tabulated below.

Properties	Metric	Imperial
Density	4.48 g/cm³	0.162 lb/in³
Melting point	≤ 1590 °C	≤ 2890 °F

Mechanical Properties

The following table shows mechanical properties of grade 6 Ti-5Al-2.5Sn alloy.

Properties	Metric	Imperial
Tensile strength	517 MPa	75000 psi
Yield strength	827 MPa	120000 psi
Elastic modulus	110 - 125 GPa	16000 - 18100 ksi
Shear modulus	48 GPa	6960 ksi
Elongation at break	15%	15%
Hardness, Brinell	320	320
Hardness, Knoop	363	363
Hardness, Rockwell C	36	36
Hardness, Vickers	349	349

Thermal Properties

The thermal properties of grade 6 Ti-5Al-2.5Sn alloy are tabulated below.

Properties	Metric	Imperial
Thermal expansion co-efficient (@0.000-100°C/32-212°F)	9.40 µm/m°C	5.22 µin/in°F
Thermal conductivity	7.80 W/mK	54.1 BTU in/hr.ft².°F

Other Designations

Equivalent materials to grade 6 Ti-5Al-2.5Sn alloy are as follows:

· ASTM B265 Grade6

· ASTM B348 Grade6

· ASTM B381 Grade6

· MIL-T-9046

· MIL-T-9047

· AMS 4926

· AMS 4910

· AMS 4966

· AMS 4953

· MIL F-83142

· MIL T-81556

· MIL T-81915

Fabrication and Heat Treatment

Machinability

Grade 6 Ti-5Al-2.5Sn alloy is hard to machine but can be successfully done using slow speeds, high coolant flow, and high feed rates. Tooling should be performed using tungsten carbide designations C1-C4 or cobalt type high speed tools.

Forming

Grade 6 Ti-5Al-2.5Sn alloy can be hot or cold formed using power brake, hydropress, stretch or drop hammer methods.

Welding

Welding of grade 6 Ti-5Al-2.5Sn alloy is rated as good.

Annealing

Annealing of this material can be performed by heating to 718-843°C (1325-1550° F) for 4 h and then air cooled. In case intermediate stress relieving is required, the material has to be heated to 538-650 °C (1000-1200° F) for 1 h, and then air cooled.

Forging

Forging can be performed at 1010-1038°C (1850-1900°F) and completed at 954-1010°C (1750-1850°F).

Hot Working

Hot working enhances the overall ductility of the material.

Cold Working

Cold working features of this material is same as that of a moderately tempered austenitic stainless steel. Post-work annealing is recommended to re-attain favorable performance properties.

Applications

Grade 6 Ti-5Al-2.5Sn alloy is used in the following application areas:

· Gas turbine engine casings and rings

· Aerospace structural parts, aircraft engine and airframe.

· Chemical processing equipment

Availability:

TITANIUM GR6 Plate

TITANIUM GR6 Fittings

TITANIUM GR6 Tube / Pipe

TITANIUM GR6 Bar

TITANIUM GR6 Sheet

TITANIUM GR6 Coil /Strap

TITANIUM GR6 Fasteners / Flanges

TITANIUM GR6 Powder

TITANIUM GR6 Welding Product

Disclaimer
Every effort is made to ensure that technical specifications are accurate. However, technical specifications included herein should be used as a guideline only. All specifications are subject to change without notice.

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