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ASTM A335 P92 High pressure boiler pipes

It is a martensitic heat-resistant steel, with the main alloy composition of Cr: 9%, Mo: 1%, etc.
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  • ASTM A335 P92

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.

Chemical Requirements of ASTM A335 P92

UNS DesignationK92460
Carbon0.07–0.13
Manganese0.30–0.60
Phosphorus(max)0.02
Sulfur(max)0.01
Silicon0.50 max
Chromium8.50–9.50
Molybdenum0.30–0.60
V0.15-0.25
N0.03-0.07
Ni (max)0.4
Al(max)0.02
Cb0.04-0.09
W1.5-2.00
B0.001-0.006
Ti (max)0.01
Zr(max)0.01


Mechanical Properties  of ASTM A335 P92

PropertiesData
Tensile strength, min, (MPa)620
Yield strength, min, (MPa)440
Elongation, min, (%), L/T20/…

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.


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