INFORMATION ON ASTM A350LF2 MATERIAL
INFORMATION ON ASTM A350LF2 MATERIAL
(OP)
DEAR SIR/MADAM,
HELLO! UNDERSTAND THAT UNDER ASTM A350LF2 CLASS MATERIAL, THERE ARE TWO SUB-CLASSES HAVING DIFFERENT OPERATING TEMPERATURE RANGES. I WOULD LIKE TO HAVE MORE DETAILED INFORMATION ON THIS ASTM A350LF2 SUB-CLASSES IN PARTICULAR TO TMEPERATURE RANGES. WITH BEST REGARDS.
YOURS TRULY,
K.K.DESAI, kdesai_@hotmail.com
HELLO! UNDERSTAND THAT UNDER ASTM A350LF2 CLASS MATERIAL, THERE ARE TWO SUB-CLASSES HAVING DIFFERENT OPERATING TEMPERATURE RANGES. I WOULD LIKE TO HAVE MORE DETAILED INFORMATION ON THIS ASTM A350LF2 SUB-CLASSES IN PARTICULAR TO TMEPERATURE RANGES. WITH BEST REGARDS.
YOURS TRULY,
K.K.DESAI, kdesai_@hotmail.com





RE: INFORMATION ON ASTM A350LF2 MATERIAL
For Class 1 material, the minimum Charpy impact energy is 15 ft-lbs (for an average of 3 specimens) versus 20 ft-lbs (average of 3 specimens) for Class 2 material. The standard impact test temperature for Class 1 material is -50 deg F and for Class 2 is 0 deg F.
RE: INFORMATION ON ASTM A350LF2 MATERIAL
LF2 Class 1 is impact tested at -50oF (-45.6oC), and
LF2 Class 2 is tested at 0oF (-18oC).
Thus, forgings passing Class 1 tests are more suitable for low temperatures. Note that adjustments in absorbed energy and in test temperature apply if necessary to use reduced size impact specimens (smaller than 10x10 mm). Variations from specified test temperature must be noted.
ASTM A350/A350M-04a is a rather long, specification with many detailed requirements. A user would certainly be interested in those relating to workmanship, depth of imperfections, limits on repairs by welding,and product marking, to name just a few. In addition, changes were made in 2004 of which I am unaware. Best that you buy it at
h