Ti CP Gr.1

1. Introduce

– Pure titanium containing approximately 99% or more Ti

– Lowest grade of industrial pure titanium with lowest iron and oxygen content

– Not suitable for use in the high temperature range above 400℃, as this is the temperature at which strength begins to decline

– UNS R50250

* 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 R50250 : 5XXXX : Titanium

2. Property

– High specific strength, corrosion resistance, biocompatibility, non-toxicity, light weight, formability, weldability, ductility, cold formability, plastic toughness

– Lowest strength among Ti CP types

[Ti CP Gr.1 Chemical Composition (%)]

[Ti CP Gr.1 Mechanical Properties]

[Ti CP Gr.1 Physical Properties]

3. Standard & Specification

– Specification : UNS R50250

4. Available Form

– Bar, Rod

– Plate, Sheet

– Tube, Pipe

– Wire, Coil

– Forgings, Fittings, Nuts, Screws, Elbows

5. Application & Product

– Aerospace, Chemical, Seawater, Power Generation, Medical

(1) Rocket engine / (2) Heat exchanger / (3) Desalination unit / (4) Suture clip