material

PRODUCT

Special Products
BW Fittings
Forged Fittings
Steel Pipe Tube
Flanges
Fasteners
Steel Sheet Plate
Round Bar
Welding Wire Electrodes

PRODUCT MATERIAL

6Al-2Sn-4Zr-2MoDownload

 A near-alpha alloy, primarily used for high strength and toughness, with good creep resistance up to 1000°F. Forging and machining characteristics similar to those of Ti 6Al-4V. Applications include compressor components, hot airframe skin, and engine afterburner structures. The weldability of Ti 6-2-4-2 is fair, using AMS 4952 weld wire. Several different treatments are available.

Sheet & Strip under 0.1875" thickness: Duplex anneal: 1650 ± 25°F), 30± 3 minutes, air cool, followed by 1450± 25°F 15± 2 minutes, air cool.

Triplex anneal: 1650°F ½ hour, air cool, followed by 1450°F ¼ hour, air cool, 1100°F 2 hours air cool.

Plate 0.1875 inch thickness and over: Duplex anneal: 650± 25°F 60± 5 minutes, air cool, followed by 1100±25°F 8 hours ± 15 minutes, air cool. Triplex anneal: 1650°F ½ hour, air cool, followed by 1450°F ¼, air cool, 1100°F 2 hours air cool.

Bar and Forgings: Duplex anneal: Solution anneal 25 - 50°F below. Beta transus 1 hour, air cool or faster, 1100°F 8 hours air cool.
Chemistry

 

Al

Sn

Zr

Mo

C

N

H

O

Si

Fe

Y

Others,
Each

Others,
Total

Ti

MIN

5.5

1.8

3.6

1.8

--

--

--

--

0.06

 

 

--

--

--

MAX

6.5

2.2

4.4

2.2

0.05

0.05

0.015

0.12

0.1

0.25

0.005

0.1

0.3

Balance

Specifications
AMS 4919, AMS 4975, AMS 4976, AMS 4979, AMS T-9047
EN 3.71450
MIL-F-81556
MIL-F-82142, MIL-T-9046
MIL-T-9047
UNS R54620
Werkstoff 3.7145
Inventory
6Al-2Sn-4Zr-2Mo Forged Billet, 6Al-2Sn-4Zr-2Mo Plate, 6Al-2Sn-4Zr-2Mo Round Bar, 6Al-2Sn-4Zr-2Mo Sheet
Common Trade Names
6-2-4-2 Titanium, 6-2-4-2
Features
• Machinability similar to austenitic stainless steels
• Easily welded if proper precautions are taken to prevent oxygen, nitrogen and hydrogen contaminations
• Long term stability for temperatures up to 800°F
Applications
• Compressor discs, blades
• Airframe structure, skin
• Engine afterburner components
• Hush kits
Physical Properties
Density: 0.160 lb/in3
Beta Transus: 1825±25°F
Thermal Conductivity: 4.00 Btu • hr/ft2 • hr°F
Coefficient of Thermal Expansion: 32-212°F 4.3 x10-6 in/in°F
Modulus of Elasticity: 16.5x106 psi
Mechanical Properties
Minimum Tensile Properties, AMS 4919, Duplex Annealed

Thickness, in

0.025 ≤ 0.062

> 0.062 ≤ 1.000

> 1.000 ≤ 3.000

Tensile Strength, ksi

135,000

135,000

135,000

0.2% offset Yield Strength, ksi

125,000

125,000

125,000

Elongation, %

8

10

10

Bend Factors, Duplex Annealed, AMS 4919

Nominal Thickness, in

≤ 0.070

> 0.070 < 0.1875

Factor, 105° Bend

9

10