Titanium Alloys


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Grade Designation and Chemical Composition for Titanium Header

Standard ASTM B265 Alloy UNS Ti C (max) Fe N (max) O (max) H (max) Al V
ALPHA
Grade 1 R 50250 Bal 0.10 0.20 0.03 0.18 0.015
Grade 2 R 50400 Bal 0.10 0.30 0.03 0.25 0.015
Grade 3 R 50550 Bal 0.10 0.30 0.05 0.35 0.015
Grade 4 R 50700 Bal 0.10 0.50 0.05 0.40 0.015
ALPHA / BETA
Ti 6 Al 4 V R 56400 Bal 0.10 0.03 0.05 0.20 0.015 5.5 – 7.5 3.5 – 4.5

Mechanical Properties for Titanium Header

Standard ASTM B265 Alloy UNS Tensile Minimum Strength N/mm²
ALPHA
Grade 1 R 50250 240
Grade 2 R 50400 360
Grade 3 R 50550 460
Grade 4 R 50700 560
ALPHA / BETA
Ti 6 Al 4 V R 56400 900

Service Properties and Applications for Titanium Header

Standard ASTM B265 Alloy UNS Service Properties Applications
ALPHA
Grade 1 R 50250 Excellent corrosion resistance and formability but limited strength Heating coils, heat exchangers
Grade 2 R 50400 Very good formability, good strength, excellent corrosion resistance Sports equipment, chemical processing
Grade 3 R 50550 Good formability, high strength, excellent corrosion resistance Plating jigs, orthodontic pins
Grade 4 R 50700 Highest strength of commercially pure grades, limited ductility, excellent corrosion resistance Plating jigs, orthodontic pins
ALPHA / BETA
Ti 6 Al 4 V R 56400 Most widely used Titanium alloy, excellent fatigue strength, excellent corrosion resistance Springs for high temperature