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6Al-4V STA
STA (Solution Treated and Aged)
titaniumalloy@bjmkgs.com

http://www.bjmkgs.com

Ti 6Al-4V STA (Solution Treated and Aged) is a modified version of Ti
6Al-4V.
thick.

It is heat treated for high strength in sections under 4"
Ti-6Al-4V has excellent hardenability in sections up to 1" thick

with strengths as high as 165 ksi.

Before

After

For maximum strength: solution-treated and aged (STA) condition is:
1) For sheet, 1675-1725°F 5 to 25 minutes, water quench. Age
975°F 4 to 6 hours, air cool.
2) For bars and forgings, 1675-1725°F 1 hour, water quench. Age
975-1025°F 4 to 8 hours, air cool.

Ti 6Al-4V STA is resistant to general corrosion but may be quickly
attacked by environments that cause breakdown of the protective oxide.
These include hydrofluoric (HF), hydrochloric (HCl), sulfuric and
phosphoric acids. Inhibitors may help for the last three but not for HF. Ti
6Al-4V STA resists attack by pure hydrocarbons, and most chlorinated
and fluorinated hydrocarbons (provided water has not caused formation
of small amounts of HCl and HF).
Chemistry
V

C

N

O

H

Fe

Y

Others,
Each

Others,
Total

Ti

MIN 5.5

3.5

--

--

--

--

--

--

--

--

--

MAX 6.75

4.5

0.08

0.05

0.2

0.0125

0.3

0.005

0.1

0.4

Balance

Al

Specifications:
AMS 4965, AMS 6930
EN 3.7164, EN 3.7165
MIL-T-9046, MIL-T-9047
UNS R56400
Werkstoff 3.7164, Werkstoff 3.7165

Inventory
6Al-4V STA Round Bar

Common Trade Names
6-4 STA Titanium, 6-4 STA, Ti 6-4 STA

Features
•

High strength to 750°F

•

Excellent general corrosion resistance

•

High strength-to-weight ratio

Applications
•

Aerospace, turbine engine and airframe applications

•

Fasteners

•

Medical and dental implants

•

High performance Automotive

Physical Properties:
Density: 0.160 lb/inch3
Melting Range: 2920 - 3020°F
Beta Transus: 1825± 25°F
Temperature, °F

70

200

400

600

Coefficient of Thermal Expansion, in/in°F x
10-6
-

5.3

5.4

5.5

Thermal Conductivity,
Btu • Ft/Ft² • Hr°F STA

4.0

4.3

5.2

6.1

Modulus of Elasticity,
psi X 106 STA

16.7

16.0

15.0

14.0

Mechanical Properties
Specified, STA sheet & plate
Tensile Strength, ksi

0.2% Yield Strength, ksi

Elongation in 2", %

170

160

10

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Ti-6Al-4V STA (Solution Treated and Aged)

  • 1. 6Al-4V STA STA (Solution Treated and Aged) titaniumalloy@bjmkgs.com http://www.bjmkgs.com Ti 6Al-4V STA (Solution Treated and Aged) is a modified version of Ti 6Al-4V. thick. It is heat treated for high strength in sections under 4" Ti-6Al-4V has excellent hardenability in sections up to 1" thick with strengths as high as 165 ksi. Before After For maximum strength: solution-treated and aged (STA) condition is: 1) For sheet, 1675-1725°F 5 to 25 minutes, water quench. Age 975°F 4 to 6 hours, air cool.
  • 2. 2) For bars and forgings, 1675-1725°F 1 hour, water quench. Age 975-1025°F 4 to 8 hours, air cool. Ti 6Al-4V STA is resistant to general corrosion but may be quickly attacked by environments that cause breakdown of the protective oxide. These include hydrofluoric (HF), hydrochloric (HCl), sulfuric and phosphoric acids. Inhibitors may help for the last three but not for HF. Ti 6Al-4V STA resists attack by pure hydrocarbons, and most chlorinated and fluorinated hydrocarbons (provided water has not caused formation of small amounts of HCl and HF). Chemistry V C N O H Fe Y Others, Each Others, Total Ti MIN 5.5 3.5 -- -- -- -- -- -- -- -- -- MAX 6.75 4.5 0.08 0.05 0.2 0.0125 0.3 0.005 0.1 0.4 Balance Al Specifications: AMS 4965, AMS 6930
  • 3. EN 3.7164, EN 3.7165 MIL-T-9046, MIL-T-9047 UNS R56400 Werkstoff 3.7164, Werkstoff 3.7165 Inventory 6Al-4V STA Round Bar Common Trade Names 6-4 STA Titanium, 6-4 STA, Ti 6-4 STA Features • High strength to 750°F • Excellent general corrosion resistance • High strength-to-weight ratio Applications • Aerospace, turbine engine and airframe applications • Fasteners • Medical and dental implants • High performance Automotive Physical Properties:
  • 4. Density: 0.160 lb/inch3 Melting Range: 2920 - 3020°F Beta Transus: 1825± 25°F Temperature, °F 70 200 400 600 Coefficient of Thermal Expansion, in/in°F x 10-6 - 5.3 5.4 5.5 Thermal Conductivity, Btu • Ft/Ft² • Hr°F STA 4.0 4.3 5.2 6.1 Modulus of Elasticity, psi X 106 STA 16.7 16.0 15.0 14.0 Mechanical Properties Specified, STA sheet & plate Tensile Strength, ksi 0.2% Yield Strength, ksi Elongation in 2", % 170 160 10