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ASTM A335 P11 alloy steel pipe

ASTM A335 P11 is a low alloy heat-resistant steel with high temperature resistance, corrosion resistance, oxidation resistance and good thermal strength.
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  • ASTM A335 P11

Packing
Bare packing/bundle packing/crate packing/wooden protection at the both sides of tubes and suitably protected for sea-worthly delivery or as requested.

Inspection and Test
Chemical Composition Inspection, Mechanical Properties Test (Tensile Strength, Yield Strength, Elongation, Flaring, Flattening, Bending, Hardness, Impact Test), Surface and Dimension Test, No-destructive Test, Hydrostatic Test.

Surface treatment
Oil-dip, Varnish, Passivation, Phosphating, Shot Blasting.

Both ends of each crate will indicate the order no., heat no., dimensions, weight and bundles or as requested.

ASTM A335 P11 Chemical Compositions(%)

CompositionsData
UNS Designa-tionK11597
Carbon0.05-0.60
Manganese0.30-0.60
Phosphorus(max.)0.025
Sulfur(max.)0.025
Silicon0.50-1.00
Nickel
Chromium1.00-1.50
Molybdenum0.44-0.65
Other Elements

Mechanical properties for ASTM A335 P11

PropertiesData
Tensile strength, min, (MPa)415 Mpa
Yield strength, min, (MPa)205 Mpa
Elongation, min, (%), L/T30/20

Material & Manufacture

Pipe may be either hot finished or cold drawn with the finishing heat treatment noted below.

Heat Treatment

  • A / N+T

  • N+T / Q+T

  • N+T


Mechanical Tests Specified

  • 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.


Notes for Hardness Test

P11 shall not have a hardness not exceeding 250 HB/265 HV [25HRC].


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