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Aluminum		5.5 - 6.75
Carbon		0.08 max
Hydrogen		0.015 max
Iron		0.25 max
Nitrogen		0.05 max
Oxygen		0.2 max
Titanium		Balance
Vanadium		3.5 - 4.5

Principal Design Features		This alpha-beta grade is the most widely available and heavily used of all the titanium grades. The alloy is heat treatable and combines excellent strength and corrosion resistance with weld and fabricability. Beta Transus (F +/- 25) 1830.

Applications		6-4 is widely used in the aircraft industry in a variety of turbine and "hot" structural applications. It is generally employed in applications up to 400 C(750 F).

Machinability		As a family, titanium and its alloys have developed a mystique as a nightmare to machine. This is simply not the case. Experienced operators have compared its characteristics to those found in 316 stainless steel. Recommended practice includes high coolant flow(to offset the material's low thermal conductivity), slow speeds and relatively high feed rates. Tooling should be tungsten carbide designations C1-C4 or cobalt type high speed tools.

Forming		This alloy may be hot or cold formed. Popular methods include hydropress, stretch or drop-hammer. This material responds similarly to 300 series stainless steels.

Welding		Rated as "fair" in terms of weldability.

Heat Treatment		Solution treat at 904-954 C(1660-1750 F) for 2 hours followed by water quench.

Forging		Rough forge at 982 C(1800 F), finish at @ 968 C (1750 C).

Hot Working		Hot forming will reduce both the springback and required forming forces, and will increase the overall ductility of the material.

Cold Working		The cold working characteristics of this material are similar to those of austenitic stainless steels. In multiple forming operations, intermediate stress relieving is recommended to offset the alloy's tendency to work harden. Post-work annealing is required to re-attain optimum performance characteristics.

Annealing		Hold at 732 C(1350 F) between 1/4 and 4 hours, Furnace cool to 566 C(1050 F) then air cool. Furnace cooling is not required for forgings and bars.

Aging		Age at 538 C (1000 F) for 4 hours, air cool.

Other Physical Props		Beta Transus (F +/- 25) 1830

Physical Data : [top]

Density (lb / cu. in.)	0.16
Specific Gravity	4.43
Specific Heat (Btu/lb/Deg F - [32-212 Deg F])	0.135
Electrical Resistivity (microhm-cm (at 68 Deg F))	171
Melting Point (Deg F)	3200
Thermal Conductivity	3.9
Modulus of Elasticity Tension	16.5
Reduction of Area	25

Form		Sheet
Condition		Solution Annealed & Aged
Temper		70
Tensile Strength		130
Yield Strength		120
Elongation		10
Reduction of Area		25
Form		Sheet
Condition		Test Specimen Annealed
Temper		70
Form		Sheet
Condition		Test Specimen Annealed
Temper		600
Tensile Strength		100
Yield Strength		90
Elongation		17
Reduction of Area		52
Form		Sheet
Condition		Test Specimen Annealed
Temper		800
Tensile Strength		90
Yield Strength		75
Elongation		18
Reduction of Area		53
Form		Sheet
Condition		Test Specimen Annealed
Temper		1000
Tensile Strength		70
Yield Strength		60
Elongation		30
Reduction of Area		68