Ti CP Gr.4

1. Introduce

– Highest Fe and O content among Ti CPs for superior strength and corrosion resistance

– Excellent strength over a temperature range of up to about 204°C

– Excellent oxidation resistance up to a temperature range of about 315℃

– UNS R50700

* CP Titanium

1. CP Titanium : unalloyed, commercially pure titanium grade(CP : Commercially Pure)
2. Grade types : Ti CP Gr.1, Gr.2, Gr.3, Gr.4
3. Elemental content
   → CP titanium has different contents of O, Fe, and N, and O, Fe, and N are treated as impurities in titanium
   (Increase or decrease of O, Fe, N: affects mechanical properties(yield strength, tensile strength, elongation))
   → Ti CP Gr.4 has the highest oxygen content
   (O : increases brittleness, decreases elongation, toughness, and high temperature stability)
4. Grades are ordered based on corrosion and formability
5. Higher grades increase strength and decrease formability

* Ti Gr.1 vs Ti Gr.2

– Ti Gr.1, Gr.2 : most impervious to impurities

– Ti Gr.1 : Highest ductility, low tensile stresses

– Ti Gr.2 : Excellent formability, yield and tensile strength, higher strength than Gr.1, suitable for surgical applications

* Ti CP vs Ti-6-4

– CP : α / β phase pure titanium

1. Allotropic transformation based on 882℃, α phase exists below 882℃ and β phase exists above 882℃
2. Mechanical properties of titanium change depending on the amount of α phase and β phase

– Ti-6-4 : α+β phase alloy titanium

1. Strength, machinability, weldability, and ability to withstand moderately high temperatures

* UNS

1. Abbreviation for Unified Numbering Systems for Metals and Alloys
2. Unified unique numbering system for metals and alloys
3. A representative number that is compatible with metals and alloys defined in many material-related codes such as ASTM, AISI, ASME, AWS, etc.

* R : Reactive and Refractory Metals and Alloys

* UNS R50700 : 5XXXX : Titanium

2. Property

– Strength, specific strength, corrosion resistance, ductility, moldability, corrosion fatigue, good biocompatibility

[Ti CP Gr.4 Chemical Composition (%)]

[Ti CP Gr.4 Mechanical Properties]

[Ti CP Gr.4 Physical Properties]

3. Standard & Specification

– Specification : UNS R50700

4. Available Form

– Bar, Rod, Billet

– Sheet, Plate, Strip

– Wire, Coil

– Forgings

– Castings

5. Application & Product

– Medical, Chemical, Aerospace

(1) Medical needles / (2) Implants / (3) Heat exchangers / (4) Gaskets