Titanium Alloys - Ti4.5Al3V2Mo2Fe Physical and Mechanical Properties

Sep 12 2003
 

Chemical Formula

Ti4.5Al3V2Mo2Fe

Background

Also known as SP 700, this beta rich alpha-beta alloy has been developed to offer superplastic properties that are superior to Ti6Al4V. Its low flow stress and fine microstructure result in superplastic formability at temperatures as low as 700°C (1290°F). This is combined with an excellent range of mechanical properties coupled with good response to heat treatment, cold forming and hot forging.

Composition

Table 1. The composition of Ti4.5Al3V2Mo2Fe.

Content

Al

4.0-5.0%

V

2.5-3.5%

Mo

1.8-2.2%

Fe

1.7-2.3%

O2

0.15% max

C

0.05% max

N2

0.05% max

H2

0.01% max

Ti

Balance

Key Properties

Physical Properties

Table 2. Typical physical properties for Ti4.5Al3V2Mo2Fe.

Property

Typical Value

Density g/cm3 (lb/ cu in)

4.54 (0.163)

Melting Range °C ±5°C (°F)

1593 (2900)

Specific Heat J/kg/°C (BTU/lb/°F)

495 (118)

Thermal Conductivity W/mK (BTU/ft hr.°F)

7 (4)

Mean Thermal Expansion Co-eff 20-100°C /°C (68-212°F /°F)

7.7x10-6 (4.3)

Beta Transus °C±15°C (°F)

900 (1652)

Mechanical Properties

Table 3. Typical mechanical properties for Ti4.5Al3V2Mo2Fe, mill annealed at 720°C (1328°F) for 1hr, followed by air cooling.

Property

Typical

0.2% Proof Stress MPa (ksi)

972 (141)

Tensile Strength MPa (ksi) sheet

1023 (148)

Elongation on 1 inch %

19.0

Reduction in Area %

61.9

Hardness Hv

305

Table 4. Typical mechanical properties for Ti4.5Al3V2Mo2Fe, after recrystallisation annealing at 800°C (1472°F) for 1hr, followed by air cooling.

Property

Typical

0.2% Proof Stress MPa (ksi)

917 (133)

Tensile Strength MPa (ksi) sheet

966 (140)

Elongation on 1 inch %

20.8

Reduction in Area %

61.6

Hardness Hv

291

Table 5. Typical mechanical properties for Ti4.5Al3V2Mo2Fe, after solution treating and ageing at 850°C (1560°F) for 1hr, followed by water quenching and 510°C (950°F) for 6hrs, followed by air cooling.

Property

Typical

0.2% Proof Stress MPa (ksi)

1265 (183)

Tensile Strength MPa (ksi) sheet

1428 (207)

Elongation on 1 inch %

9.0

Reduction in Area %

26.8

Hardness Hv

421

Table 6. Typical mechanical properties for Ti4.5Al3V2Mo2Fe, after solution treating and ageing at 850°C (1560°F) for 1hr, followed by water quenching and 510°C (950°F), followed by air cooling.

Property

Typical

0.2% Proof Stress MPa (ksi)

1114 (162)

Tensile Strength MPa (ksi) sheet

1213 (176)

Elongation on 1 inch %

14.4

Reduction in Area %

39.6

Hardness Hv

380

Source: The Titanium Information Group

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

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