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Sep 01, 2015
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Written by SuperUser

Titanium Grade 8 - Alloy 8-1-1 / 8Al-1Mo-1V


Technical Data Sheet

Chemical Composition Limits

Weight %

Al

Mo

V

Fe

C

N

H

O

Other (total)

Titanium
8Al-1Mo-1V

7.35-8.35

0.75-1.25

0.75-1.25

0.30

0.08

0.05

0.015

0.15

0.40

Titanium 8-1-1 (8Al-1Mo-1V) is a near alpha alloy offering good weldability and with superior creep resistance at operating temperature up to 450°C. Alloy 8-1-1 has a relatively high tensile modulus to density ratio and is used primarily in engine applications such as forged compressor blades and disks.

Typical Mechanical Properties

Material

Diameter

Tensile Strength min

Yield Strength

Elongation (%)

Reduction of area(%)

ksi

Mpa

ksi

Mpa

Titanium 8Al-1Mo-1V
Bar
Solution treated and stabilized

Up to 2.5"

130

896

120

827

10

20

Titanium 8Al-1Mo-1V
Bar
Solution treated and stabilized

2.5" - 4.0"

120

827

110

758

10

20



Specifications
AMS 4915 sheet, strip, plate (single annealed)
AMS 4916 sheet, strip, plate (duples annealed)
AMS 4972 bar, wire, ring (solution treated and stabilized)
AMS 6910 bar (duplex annealed)
AMS-T-9046 A-4 sheet, strip, plate
AMS-T-9047 8Al-1Mo-1v bar
MIL-T-9046J A-4 sheet, strip, plate
MIL-T-9046H Type II Comp F sheet, strip, plate
MIL-T-9047G 8Al-1Mo-1V bar

 

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Grade 8 Al 1Mo 1V Titanium Alloy (UNS R54810)

Introduction

Titanium alloys contain titanium and other chemical elements such as molybdenum, aluminum, vanadium, and iron.

Grade 8 Al 1Mo 1V titanium alloy is a near alpha alloy. This grade has high stiffness/density ratio, high modulus, low density, good elevated temperature tensile properties, medium to high strength, and excellent creep resistance to enable operating temperatures of up to 455°C (851°F).

The following sections will discuss in detail about grade 8 Al 1Mo 1V titanium alloy.

Chemical Composition

The chemical composition of grade 8 Al 1Mo 1V titanium alloy is outlined in the following table.

Element

Content (%)

Aluminum, Al

7.35 - 8.35

Vanadium, V

0.75 - 1.25

Molybdenum, Mo

0.75 - 1.25

Iron, Fe

0.3 max

Oxygen, O

0.12 max

Carbon, C

0.08 max

Nitrogen, N

0.05 max

Hydrogen, H

0.0125 max

Titanium, Ti

Remainder

Physical Properties

The physical properties of grade 8 Al 1Mo 1V titanium alloy are tabulated below.

Properties

Metric

Imperial

Density

4.37 g/cm3

0.158 lb/in3

Melting point

≤ 1540°C

≤ 2800°F

Mechanical Properties

The following table shows mechanical properties of grade 8 Al 1Mo 1V titanium alloy.

Properties

Metric

Imperial

Tensile strength

937 MPa

136000 psi

Yield strength

910 MPa

132000 psi

Poisson’s ratio

0.32

0.32

Elastic modulus

120 GPa

17400 ksi

Shear modulus

46 GPa

6670 ksi

Elongation at break

18%

18%

Hardness, Brinell

334

334

Hardness, Knoop

363

363

Hardness, Rockwell C

36

36

Hardness, Vickers

349

349

Thermal Properties

The thermal properties of grade 8 Al 1Mo 1V titanium alloy are tabulated below.

Properties

Metric

Imperial

Thermal expansion co-efficient (@0.000-100°C/32-212°F)

8.50 µm/m°C

4.72 µin/in°F

Thermal conductivity

6 W/mK

41.6 BTU in/hr.ft².°F

Other Designations

Equivalent materials to grade 8 Al 1Mo 1V titanium alloy are as follows:

·         AMS 4915

·         AMS 4916

·         AMS 4933

·         AMS 4955

·         AMS 4972

·         AMS 4973

·         MIL F-83142

·         MIL T-81556

·         MIL T-9046

·         MIL T-9047

Fabrication and Heat Treatment

Machinability

Although tough, grade 8 Al 1Mo 1V titanium alloy can be machined using the right quantity of coolant flow, slow speeds and high feed rates. High-speed tools should be used for tooling this alloy and the recommended tool types are tungsten carbide designations C1-C4 or cobalt based.

Forming

Grade 8 Al 1Mo 1V titanium alloy can be hot or cold formed using hydropress, stretch or drop-hammer methods.

Welding

Weldabilty of grade 8 Al 1Mo 1V titanium alloy is rated as fair.

Annealing

Annealing of this material requires single-hold at 738°C (1450° F) for 8 h, followed by furnace cooling. Duplex single annealing is performed by heating to 788°C (1450 °F) for 1/4 h and air cooled. Stress relief annealing requires the material to be held at 593-649°C (1100-1200 °F) for 1 h and air cooled.

Forging

Rough forging can be performed at 1010-1038°C (1850-1980°F) and completed at 1010°C (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 austenitic stainless steel. Post-work annealing is recommended to re-attain favorable performance properties.

Applications

Grade 8 Al 1Mo 1V titanium alloy is used in the following application areas:

·         In jet engine components such as forged fan and compressor blades.

·         Industrial components such as discs, spacers, seals, rings, etc.

 

 

 

Availability:

 

 

  
 

TITANIUM GR8   Plate

TITANIUM GR8   Fittings

TITANIUM GR8   Tube / Pipe

 

 

 

 

 

TITANIUM GR8   Bar

TITANIUM GR8   Sheet

TITANIUM GR8   Coil /Strap

 

 

 

 

 

TITANIUM GR8   Fasteners / Flanges

TITANIUM GR8   Powder

TITANIUM GR8   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.

Provide all grade of these alloy by different shape & size is Our expertise

For any inquiry & request, don't hesitate to contact us