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