| Certificate: | LR， BV， DNV， GL， ABS， KR， CCS， TS， PED， AD2000， ASME II ， III， | Material Grade: | GRADE 2 |
|---|---|---|---|
| Standard: | ASTM B861 | Surface: | Bright Annealed And Pickled And Polished |
| Size: | 1/4’to 12′ | W.T.: | 1”to 16” |
ASTM B861 Grade 2 Titanium Alloy Heat Exchangers Food Chemical
Due to the inefficiency of stainless steel and other materials in many cases， titanium tubes and pipes are increasingly being used in a myriad of applications. A common titanium mill product is titanium tubing， which is used in a variety of products due to its superior corrosion resistance and strength-to-weight ratio. The development of many different alloys has expanded the use of titanium in industries ranging from industrial and chemical processing to power generation.
The American Society of Mechanical Engineers has approved most grades of titanium， which means more options for a variety of projects. While grades 1， 2， 3， 7， 9 and 11 are available， Grade 2 is suitable for most situations. the ready availability of Grade 2 makes it the material of choice for rapid production and larger orders.
Before choosing any grade， it is vital to determine exactly how a grade will be used. grades 7， 12， 16 or 26 can be used to make titanium pipes for use in areas where greater corrosion resistance is required. grades 3 and 12 may be the material of choice for pipes requiring greater strength.
Chemical Composition of ASTM B861 Grade 2
| Titanium Gr 2 | C | Ti | N | Fe | H | O | V | Al |
| 0.1 max | 99.2 min | 0.03 max | 0.3 max | 0.015 max | 0.25 max | – | – |
Mechanical Properties of ASTM B861 Grade 2
| TITANIUM ALLOY | UNS | PROOF STRENGTH RP0.2 MPA MIN | TENSILE STRESS RM MPA MIN | ELONGATION A % MIN |
|---|---|---|---|---|
| Cp Ti Grade 1 | R50250 | 138-310 | 240 | 24 |
| Cp Ti Grade 2 | R50400 | 275-450 | 345 | 20 |
Tensile Strength of ASTM B861 Grade 2
| Grade | Tensile Strength， min | Yield Strength (0.2% Offset) | Elongation 2 in. or 50 mm | |||||
| min | max | |||||||
| Ksi | (Mpa) | Ksi | (Mpa) | Ksi | (Mpa) | gage length min % | ||
| Grade 1 | 35 | (240) | 25 | (170) | 45 | (310) | 24 | |
| Grade 2 | 50 | (345) | 40 | (275) | 65 | (450) | 20 | |
Equivalent Grades of Astm ASTM B861 Grade 2
| SUPPLIER OF TITANIUM GRADES | UNS | ASTM/ASME | WERKSTOFF NR. | AFNOR |
|---|---|---|---|---|
| Ti Grade 1 (CP Ti) | R50250 | Grade 1 | W.Nr. 3.7025 | T-35 |
| Ti Grade 2 (CP Ti) | R50400 | Grade 2 | W.Nr. 3.7035 | T-40 |
Tolerances of ASTM B861 Grade 2
| SIZE OD， MM (IN.) | TOLERANCES OD， MM (IN.) | WT MIN WALL % |
|---|---|---|
| < 25.4 (< 3/8) | ±0.102 (0.004) | +20/-0 |
| 25.4-38.1 (1-1 1/2) | ±0.127 (0.005) | +20/-0 |
Application:
- Chlorination systems
- Heat Exchangers
- Food Chemical
- Flue gas desulfurization systems
- Pulp and paper production
