UNS R56401 (Titanium alloy 6Al-4V ELI)

Short Introduction:

  • Titanium alloy 6Al-4V ELI is normally used in the annealed condition. And is the preferred choice for the medical implant field.

Category:

Description

UNS R56401 (Titanium alloy 6Al-4V ELI)

UNS R56401 (Titanium alloy 6Al-4V ELI)

Material grades and equivalents Titanium alloy 6Al-4V ELI /UNS R56401

 Introduction

Low interstitial version of Titanium alloy 6Al-4V ELI, for maximum toughness. Preferred for marine and cryogenic applications. This grade is normally used in the annealed condition. Titanium alloy 6Al-4V ELI is the preferred choice for the medical implant field.

Stress relief 900-1200°F 1 to 4 hours, air cool. Duplex anneal, bar and forgings: Solution anneal 50-100°F below the beta transus, hold 1 hour minimum, air cool. Then reheat within the range 1300-1400°F, hold 1 hour minimum, air cool. Stress – relief annealing is performed after welding.

Chemistry Composition

Element

Al

V

Fe

O

C

N

H

Y

Others,

Each

Others,

Total

Ti

MIN

5.5

3.5

MAX

6.5

4.5

0.25

0.13

0.08

0.03

0.0125

0.005

0.1

0.4

Balance

 

Physical Properties

Density: 0.160 lb/in3
Melting Range: 2370 – 2460°F
Beta Transus: 91790+25°F

Minimum Tensile Properties, AMS 4919, Duplex Annealed:

Temperature, °F

68-212

68-600

68-1000

68-1200

68-1500

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

9.18

9.54

10.08

10.44

10.8

Mechanical Properties

Typical hardness Rockwell: C 30-34 Specific minimums, AMS 4931, bar and forging

Representative Tensile Properties, Sheet

Diameter, in

< 3.0

< 3.0 < 4.0

< 4.0) < 6.0

Tensile Strength, ksi

125

123

120

0.2 % Yield Strength, ksi

115

110

110

Elongation, % *L (**ST)

10 (8)

10 (8)

8 (8)

Reduction of Area, % *L (**ST)

25 (–)

20 (15)

15 (15)

* Longitudinal ** Short Transverse

Typical Elevated temperature Properties

Temperature, °F

93 (200)

149 (300)

204 (400)

260 (500)

Ultimate Tensile Strength, ksi

843.3 (121)

772.2 (112)

723.9 (105)

657.7 (98)

0.2 % Yield Strength, ksi

710.2 (103)

641.2 (93)

586.1 (85)

531.0 (77)

Elongation, %

13

15

16

16