Ti-Pd (Gr7 and Gr11)
Titanium-palladium alloys with nominal palladium contents of about 0.15% Pd are used in applications requiring excellent corrosion resistance in chemical processing or storage applications where the environment is mildly reducing or fluctuates between oxidizing and reducing.
Ti-Pd Grade 7
Grade 7 contains 0.12 to 0.25% palladium. This grade is similar to Grade 2. The small quantity of palladium added gives it enhanced crevice corrosion resistance at low temperatures and high pHMost corrosion-resistant titanium alloy offers outstanding resistance to general and localized crevice corrosion in a wide range of oxidizing and reducing acid environments including chlorides, with a good balance of moderate strength, reasonable ductility and excellent weld-ability. Physical and mechanical properties are equivalent to Grade 2.
Ti-Pd Grade 11
This alloy has mechanical properties similar to commercially pure titanium grade 1, but with palladium added to enhance corrosion resistance in crevices and reducing acid chloride environments. As with grade 1, grade 11 has optimum ductility and cold formability. It has useful strength, high impact toughness and excellent weld-ability.
Chemical composition of Titanium Gr7 and 11 (%, max.)
Grade |
UNS |
DIN |
O |
N |
C |
H |
Fe |
Pd |
Gr7 |
R52400 |
3.7235 |
0.25 |
0.03 |
0.08 |
0.015 |
0.30 |
0.12-0.25 |
Gr11 |
R52250 |
3.7225 |
0.18 |
0.03 |
0.08 |
0.015 |
0.20 |
0.12-0.25 |
* According to latest ASTM B265, B348, B381, B338, B861, B862, B863
* Residual elements total < 0.4%, with single < 0.1%
Grade
UNS
O
N
C
H
Fe
Pd
ERTi-7
R52401
0.08-0.16
0.015
0.03
0.008
0.12
0.12-0.15
ERTi-11
R52251
0.03-0.10
0.012
0.03
0.005
0.08
0.12-0.15
* According to AWS A5.16/A5.16M:2007, for titanium welding application
Mechanical properties of Titanium Gr7 and 11
Grade |
Tensile strength |
Yield strength |
Elongation in 4D |
Reduction of area |
Hardness |
|
Gr7 |
345 |
275 |
20 |
30 |
150 |
|
Gr11 |
345 |
275 |
20 |
30 |
150 |
* According to ASTM B348
Available forms
● Ingot
● Rod and bar
● Plate and sheet
● Forging, ring, disc
● Tube and pipe, pipe fittings
● Wire
● Fastener
● Custom-made shapes
Specification
ASTM B265, ASTM B348, ASTM B381, ASTM B338, ASTM B861/862, ASTM B863, ASTM B363
AWS A5.16
Typical application
▲ Chemical processing
▲ Chlorate manufacturing
▲ Desalination
▲ Marine applications