Titanium Alloys - Ti6Al2Zr2Sn2Mo2Cr0.25Si Physical and Mechanical Properties

Sep 12 2003

Chemical Formula

Ti6Al2Zr2Sn2Mo2Cr0.25Si

Background

Ti6Al2Zr2Sn2Mo2Cr0.25Si or Ti-6-22-22 was developed to fill the need for a deep hardeneable, lower density, high toughness material. It is alpha-beta in structure and combinations of high toughness and high strength accompanied by good ductility are achievable in alpha-beta processed bar at dimensions of up to 100mm.

Composition

Table 1. The composition of Ti6Al2Zr2Sn2Mo2Cr0.25Si.

Content

Al

5.5-6.5%

Zr

1.5-2.5%

Sn

1.5-2.5%

Mo*

1.5-2.5%

Cr*

1.5-2.5%

Si

0.2-0.3%

C

0.05% max

O2

0.14% max

H2

0.01% max

N2

0.04% max

Ti

Balance

* Mo + Cr = 4.0-5.0%

Key Properties

Physical Properties

Table 2. Typical physical properties for Ti6Al2Zr2Sn2Mo2Cr0.25Si.

Property

Typical Value

Density g/cm3 (lb/ cu in)

4.51 (0.162)

Beta Transus °C±15°C (°F)

979 (1795)

Mechanical Properties

Table 3. Typical room temperature tensile properties in 108mm diameter bar after solution treatment and ageing at 946°C (1745°F), 0.5hr water quenched and 538°C (1000°F) for 4 hours followed by air cooling.

Position

Direction

0.2% Proof Str. MPa (ksi)

Tensile Str. MPa (ksi)

Elong %

Red’n in area %

Frac. Tough K1C

Edge

Long.

1214 (175)

1338 (193)

7.5

13.6

Middle

Long.

1117 (161)

1248 (180)

9.0

18.8

Centre

Long.

1086 (157)

1241 (179)

10.0

17.5

64

Edge

Trans

1110 (160)

1248 (180)

8.5

16.5

70

Middle

Trans

1117 (161)

1241 (179)

7.5

17.3

Source: The Titanium Information Group

For more information on this source please visit The Titanium Information Group

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