ASTM A335 P9 steel pipe Usage/ASTM A335 P9steel pipe Mechanical Tests

Posted:2015-11-30 03:12:07

ASTM A335 P9 is the part of ASTM A335, The pipe shall be suitable for bending, flanging, and similar forming operations, and for fusion welding. The steel material shall conform to chemical composition, tensile property, and hardness requirements.

Compositions	Data
UNS Designa-tion	K41545
Carbon(max.)	0.15
Manganese	0.30-0.60
Phosphorus(max.)	0.025
Silicon(max.)	0.50
Chromium	4.00-6.00
Molybdenum	0.45-0.65

Properties	Data
Tensile strength, min, (MPa)	415 Mpa
Yield strength, min, (MPa)	205 Mpa
Elongation, min, (%), L/T	30/20

ASTM A335 P9 use
Alloy pipes are mainly used for low and medium pressure boiler ( working pressure is generally not more than 5.88Mpa, operating temperature 450 ℃ or less ) of heating surface tubes ; for high-pressure boilers ( above 9.8Mpa working pressure in general , the working temperature of 450 ℃ ~ 650 between ℃) of heating surface tubes , economizer , superheater , reheater , petrochemical industrial pipe.

ASTM A335 P9 Mechanical Tests
Transverse or Longitudinal Tension Test and Flattening Test, Hardness Test, or Bend Test.
For material heat treated in a batch-type furnace, tests shall be made on 5% of the pipe from each treated lot. For small lots, at least one pipe shall be tested.
For material heat treated by the continuous process, tests shall be made on a sufficient number of pipe to constitute 5% of the lot, but in no case less than 2 pipe.

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