Advanced Metals
Commercially Pure Titanium (Gr1-Gr4)
Titanium commercial grade are commonly referred to as CP titanium. Titanium Grades 1,2,3,4 are all considered unalloyed CP grade and have similar properties.
Grade 1
This is the most widely used titanium alloy. It has very high strength but relatively low ductility.
The main application of this alloy is in aircraft and spacecraft. Offshore use is growing. The alloy is weld-able and can be precipitation hardened.
Grade 2
Grade 2 is highly corrosion-resistant in highly oxidizing and mildly reducing environments, including chlorides.
Grade 2 is the most widely used titanium alloy in all product forms for industrial service, offering an excellent balance of moderate strength and reasonable ductility.
Grade 3
Unalloyed titanium offers optimum ductility and cold formability with useful strength, high impact toughness, and excellent weld-ability. Titanium Grade 3 is highly corrosion resistant in oxidizing and mildly reducing environments, including chlorides.
Grade 4
Unalloyed titanium offers reasonable high strength with good weld-ability. Good corrosion resistance in neutral to oxidizing environments, including chlorides.
Chemical composition of CP titanium Gr1-Gr4 (%, max.)
|
Grade |
UNS |
DIN |
O |
N |
C |
H |
Fe |
|
Gr1 |
R50250 |
3.7025 |
0.18 |
0.03 |
0.08 |
0.015 |
0.20 |
|
Gr2 |
R50400 |
3.7035 |
0.25 |
0.03 |
0.08 |
0.015 |
0.30 |
|
Gr3 |
R50550 |
3.7055 |
0.35 |
0.05 |
0.08 |
0.015 |
0.30 |
|
Gr4 |
R50700 |
3.7065 |
0.4 |
0.05 |
0.08 |
0.015 |
0.50 |
* Residual elements total < 0.40%, with single < 0.10%
* According to ASTM B265, 348, 338, 861, 862, 863
Classification
UNS
O
N
C
H
Fe
ERTi-1
R50100
0.03-0.10
0.012
0.03
0.005
0.08
ERTi-2
R50120
0.08-0.16
0.015
0.03
0.008
0.12
ERTi-3
R50125
0.13-0.20
0.02
0.03
0.008
0.16
ERTi-4
R50130
0.18-0.32
0.025
0.03
0.008
0.25
* Residual elements total < 0.20%, with single < 0.05%, except for yttrium < 0.005%
* According to AWS A5.16/A5.16M:2007, for titanium welding application
Mechanical properties of CP titanium Gr1-Gr4
Grade
Tensile strength
Yield strength
Elongation in 4D
Reduction of area
Hardness
Gr1
240
138
24
30
115
Gr2
345
275
20
30
160-200
Gr3
450
380
18
30
180-220
Gr4
550
483
15
25
250
(MPa, min.)
(MPa, min.)
(%, min.)
(%, min.)
(HV)
Available forms
● Ingot
● Rod and bar
● Plate and sheet
● Forging, ring, disc
● Tube and pipe, pipe fittings
● Capillary tube
● Wire
● Fastener
● Medical profile
● Anode basket
● Expanded sheet and wiremesh
● Jig and rack
● Custom-made shapes
Specification
ASTM B265, ASTM B348, ASTM B381, ASTM B338, ASTM B861/862, ASTM B863, ASTM B363
ASTM F67
ISO 5832-2
AWS A5.16
Typical application
▲ Architecture
▲ Power generation
▲ Medical industry
▲ Hydro-carbon processing
▲ Marine industry
▲ Exhaust pipe shrouds
▲ Airframe skin
▲ Desalination
▲ Chemical processing
▲ Chlorate manufacturing
▲ Chemical processing
▲ Cryogenic vessels
▲ Heat exchangers
▲ CPI equipment
▲ Condenser tubing
