Tianjin Bohai Metal Corporation

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.

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Commodity name: 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