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HY Titanium 6-4 ELI Material grades and equivalents

6-4 ELI Titanium, 6-4 ELI, UNS R56401

Introduction

Low interstitial version of HY Titanium 6-4 ELI, for maximum toughness. Preferred for marine and cryogenic applications. This grade is normally used in the annealed condition. HY Titanium 6-4 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

Features

Resistant to bodily fluidsResistant to a variety of corrosive environmentsFreedom from chloride stress corrosion crackingGood strength and toughness over a wide temperature rangeHigh resistance to erosion corrosion and corrosion fatigueUseful resistance to dry chlorine, fluorine, hydrogen chloride and hydrogen fluoride gases

Applications

Medical and dental implantsCryogenicsAerospaceChemical processing

Physical Properties

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

Minimum Tensile Properties, AMS 4919, Duplex Annealed

Mechanical Properties

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

Representative Tensile Properties, Sheet

* Longitudinal ** Short Transverse

Typical Elevated temperature Properties