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