Alloy Steel Grade P91 Seamless Tubes

As an acclaimed enterprise of the industry, Sunrise Steel Centre is involved in offering a vast array of ASTM A335 P91 Alloy Seamless Pipes as a manufacturer, exporter, stockiest and supplier to our domestic and global clients. We never use to compromise over quality of ASTM A335 P91 Alloy Pipes, thus adopted several stringent guiding principles and policies that have been recommended by industry.

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Also, we make safe packaging of our range using qualitative material, which helps in protecting them from damage or any defect during transit. Meanwhile, with respect to national and international quality of raw materials, we also offer these pipes in customized sizes and thicknesses as per specific demands by our esteemed clients at market leading prices.

ASTM A335 Grade P91 Alloy Steel Seamless Pipe Specification

Dimensions : ASTM, ASME and API

Standard : ASTM A 335 / ASME SA 335

Size : 1/2” NB to 36” NB

Schedule : SCH 40, SCH 80, SCH 160, SCH XS, SCH XXS, All Schedules, upto 12mm thk

Outer Diameter : 19.05mm – 114.3mm

Wall Thickness : 2.0mm – 14 mm

Type : Seamless

End : Plain End, Beveled End, Treaded

Form : Round, Square, Rectangular, Hydraulic Etc

Length : Single Random, Double Random & Required Length, Custom Size – 12 Meter lengths

Alloy Steel Grade P91 Seamless Pipes Chemical Composition

Element	Alloy Steel P91
C	0.08-0.12
Cr	8.0-9.5
Mn	0.3-0.6
Mo	0.85-1.05
P	0.02 max
S	0.01 max
Si	0.2-0.5
V	0.18-0.25
Nb	0.06-0.10
Ni	0.4 max
N	0.03-0.07
Al	0.04 max

ASTM A335 P91 Seamless Pipes Mechanical Properties

Element	Alloy Steel P91
Tensile Strength	585 min
Yield Strength	415 min
Hardness, HB	250 max
Elongation %	20 min

A335 Gr P91 Alloy Steel Seamless Pipes Tolerance

NPS	OD Tolerance	NPS	WT Tolerance
1/8″ ≤ NPS ≤ 1 1/2″	+/- 0.4	1/8″ ≤ NPS ≤ 2 1/2″ , All T/D ratios.	+20%, -12.5%
1 1/2 < NPS ≤ 4″	+/- 0.79	NPS ≥ 2 1/2″ , T/D ≤ 5%	+22.5%, -12.5%
4″ < NPS ≤ 8″	+1.59, -0.79	NPS ≥ 2 1/2″ , T/D > 5%	+15%, -12.5%
8″ < NPS ≤ 12″	+2.38, -0.79	(T= Specified Wall Thickness; D = Specified Outside Diameter)