Titanium Alloy Grade 20 Ti-3Al-8V-6Cr-4Zr-4Mo-0.05Pd (UNS R58645)

Topics Covered

Introduction
Chemical Composition
Physical Properties
Mechanical Properties

Introduction

Titanium alloys are metals containing a combination of titanium and other chemical elements such as vanadium, zirconium, palladium, and chromium. They are lightweight and corrosion resistant. Grade 20 Ti-3Al-8V-6Cr-4Zr-4Mo-0.05Pd alloy is a beta wrought alloy.

The following sections will discuss in detail about grade 20 Ti-3Al-8V-6Cr-4Zr-4Mo-0.05Pd alloy.

Chemical Composition

The chemical composition of grade 20 Ti-3Al-8V-6Cr-4Zr-4Mo-0.05Pd alloy is outlined in the following table.

Element Content (%)
Titanium, Ti 71 - 76.96
Vanadium, V 7.5 - 8.5
Chromium, Cr 5.5 - 6.5
Zirconium, Zr 3.5 - 4.5
Molybdenum, Mo 3.5 - 4.5
Aluminum, Al 3-4
Iron, Fe ≤ 0.30
Oxygen, O ≤ 0.12
Carbon, C ≤ 0.050
Palladium, Pd 0.040 - 0.080
Nitrogen, N ≤ 0.030
Hydrogen, H ≤ 0.020
Remainder, each ≤ 0.15
Remainder, total ≤ 0.40

Physical Properties

The physical properties of grade 20 Ti-3Al-8V-6Cr-4Zr-4Mo-0.05Pd alloy are tabulated below.

Properties Metric Imperial
Density 4.81 g/cm³ 0.174 lb/in³

Mechanical Properties

The following table shows mechanical properties of grade 20 Ti-3Al-8V-6Cr-4Zr-4Mo-0.05Pd alloy.

Properties Metric Imperial
Tensile strength 1172 - 1248 MPa 170000 - 181000 psi
Yield strength 1104 - 1152 MPa 160100 - 167100 psi
Elastic modulus ≥ 103 GPa ≥ 14900 ksi
Elongation at break 6.0 - 10% 6.0 - 10%

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