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ASTM A335 P91 Seamless Alloy Steel Pipe
ASTM A335 P91 Seamless Alloy Steel Pipe
ASTM A335 P91 Seamless Alloy Steel Pipe
ASTM A335 P91 Seamless Alloy Steel Pipe

ASTM A335 P91 Seamless Alloy Steel Pipe

The astm a335 P91 pipe is a seamless Pipe meant for high temperature applications. These pipes are made from ferritic Alloy-Steel.
Product introduction

Product Description
The astm a335 P91 pipe is a seamless Pipe meant for high temperature applications. These pipes are made from ferritic Alloy-Steel.
Chemically the a335 P91 welded pipe contains elements like Molybdenum (Mo) and Chromium added to the alloy. When Molybdenum
and chromium are added to the alloy, there is an increase in the tensile strength of the sa335 grade P91 pipe. The tensile strength of
the a335 grade P91 pipe is 415 Mpa, while its yield strength is 205 Mpa. The elongation percentage of the pipe ranges between 20% to 30%.
Alloy Steel P91 Seamless Pipes is often referred to as excellent steel due to its increased resistance to chloride corrosion making it a very
suitable material for use in salt water environments.

Specialized in Large Diameter Size
Outer Dimensions 19.05mm – 114.3mm
Wall Thickness 2.0mm – 14 mm
Length max 16000mm
Schedule Schedule 20 - Schedule XXS (heavier on request) up to 250 mm thk.
Form Round, Square, Rectangular, Hydraulic Etc.
Standard ASTM A335 P91, SA335 P91 (with IBR Test Certificate)
Size 1/2 NB to 36 NB
Thickness 3-12mm
Schedule SCH 40, SCH 80, SCH 160, SCH XS, SCH XXS, All Schedules
Tolerance Cold drawn pipe: +/-0.1mmCold rolled pipe: +/-0.05mm
Craft Cold rolled and Cold drawn
Type Seamless / ERW / Welded / Fabricated
Length Single Random, Double Random & Cut Length.
End Plain End, Beveled End, Treaded
Specialized in Large Diameter SA335 P91 Material
Additional Testing NACE MR 0175, NACE TM0177, NACE TM0284, HIC TEST, SSC TEST, H2 SERVICE, IBR, etc.
Application Seamless Ferritic Alloy-Steel Pipe for High-Temperature Service
 
ASTM A335 P91 Pipe Types Out diameter Wall thickness Length
ASTM A335 P91 Seamless Pipe (Custom Sizes) 1/2" NB - 60" NB SCH 5 / SCH 10 / SCH 40 / SCH 80 / SCH 160 Custom
ASTM A335 P91 Welded Pipe (in Stock + Custom Sizes) 1/2" NB - 24" NB As per requirement Custom
ASTM A335 P91 ERW Pipe (Custom Sizes) 1/2" NB - 24" NB As per requirement Custom
ASTM A335 High Pressure P91 Boiler Pipe 16" NB - 100" NB As per requirement Custom
Technical data

ASTM A335 P91 Chemical Composition

C, % Mn, % P, % S, % Si, % Cr, % Mo, % V, % N, % Ni, % Al, % Nb, %
0.08-0.12 0.3-0.6 0.02 max 0.01 max 0.2-0.5 8.0-9.5 0.85-1.05 0.18-0.25 0.03-0.07 0.4 max 0.04 max 0.06-0.10

ASTM A335 P91 Properties

Tensile Strength , MPa Yield Strength, MPa Elongation, % Hardness, HB
585 min 415 min 20 min 250 max

Physical Properties Of P91 Pipe

Temperature T
° C / ° F
(° C / F)

Specific heat J / kgK
(Btu / lb ° F)
Thermal conductivity
W / mK
(Btu · in / ft 2 · h · ° F)
Electrical resistance
μΩ · cm
(Ω circ / ft)
Young's modulus
kN / mm 2
(10 3 ksi)
Expansion coefficient from 20 ° C to T
10 -6 / K
(10 -6 / ° F)
20/68 460 (-) 26 (-)   218 (-)  
200/392       207 (-) 11.3 (-)
400/752       190 (-) 12.0 (-)
500/932   30 (-)     12.3 (-)
600/1112         12.6 (-)
650/1202       162 (-) 12.7 (-)
 
temperature 0.2% proof stress
at higher temperatures
° C / ° F Rp 0.2
  Mpa / ksi
100/212 410 / 59.4
200/392 380 / 55,1
300/572 360 / 52,2
400/752 340 / 49,3
500/932 300 / 43.5
600/1112 215 / 31,1
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