ASTM A335 P91 Alloy Steel Seamless Pipes

Reliable Pipes & Tubes Ltd. is leading Manufacturers, Suppliers, Stockiest and Exporters of ASTM A335 P91 Alloy Steel Seamless Pipes . These ASME SA335 T91 SMLS Pipe is used mainly for for High-Temperature Service. These pipes are widely used in different various application such as oil & gas, power plants, ship building, heavy engineering industries etc. All products are industry-standard conforming to or exceeding API, ASTM, ASME, ANSI and other national and international standards. Amardeep Steel Centre specializes in ASTM A335 / ASME SA335 Grade P91 Alloy Steel Seamless Pipes, ANSI B 36.10, Alloy Steel Gr P91 Seamless Round, P91 Pipe, Square, Rectangular, Hydraulic pipes With years of experience in exporting. Amardeep Steel Centre has export high quality Stainless Steel 904L Works off Nr. 1.4539, Stainless Steel UNS N08904 Pipes, Plates & Tubes to customers throughout the worldwide. P91 pipes are available in different size, specification, grades & thikness as per the clients requirements.

ASTM A335 P1 Alloy Steel Seamless Pipes

Specification Of SA335 P91:

Size:1/8NB TO 24NB IN
Standards:ASTM A335, ASME SA335, UNS K91560
Type:Seamless
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.
Length:Single Random, Double Random & Cut Length.
Tubing End:Plain End, Beveled End, Treaded.

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ASTM A335 Grade P91 Alloy Steel Pipe Chemical Compositions :

C, %Mn, %P, %S, %Si, %Cr, %Mo, %V, %N, %Ni, %Al, %Nb, %
0.08-0.120.3-0.60.02 max0.01 max0.2-0.58.0-9.50.85-1.050.18-0.250.03-0.070.4 max0.04 max0.06-0.10

UNS K91560 Seamless Pipes Mechanical Properties :

Tensile Strength , MPaYield Strength, MPaElongation, %Hardness, HB
585 min415 min20 min250 max

SA335 P91 Alloy Steel Seamless Pipes Heat Treatment Requirements :

P5, P9, P11, and P22

Grade

Heat Treatment Type

Normalizing Temperature Range F [C]

Subcritical Annealing 
or Tempering 
Temperature Range F 

[C]

P5 (b,c)

Full or Isothermal Anneal

Normalize and Temper

*****

1250 [675]

Subcritical Anneal (P5c only)

*****

1325 – 1375 [715 – 745]

P9

Full or Isothermal Anneal

Normalize and Temper

*****

1250 [675]

P11

Full or Isothermal Anneal

Normalize and Temper

*****

1200 [650]

P22

Full or Isothermal Anneal

Normalize and Temper

*****

1250 [675]

P91

Normalize and Temper

1900-1975 [1040 – 1080]

1350-1470 [730 – 800]

Quench and Temper

1900-1975 [1040 – 1080]

1350-1470 [730 – 800]

SA335 P91 Pipe Tensile Requirements :

Seamless

P-5

P-9

P-11

P-22

P-91

P91 shall not have a hardness not exceeding 250 HB/265 HV [25HRC].

Tensile   Strength, min.,   psi

ksi

60

60

60

60

85

MPa

415

415

415

415

585

Yield Strength,   min., psi

ksi

30

30

30

30

60

MPa

205

205

205

205

415

Seamless Pipe/ Steel Seamless Pipe Wall Thickness :
NPS [DN] DesignatorTolerance, % from Specified
OverUnder
1/8 to 2 1/2 [6 to 65] incl., all t/D ratios20.0%12.5%
Above 2 1/2  [65], t/D < or = 5%22.5%12.5%
Above 2 1/2  [65], t/D > 5%15.0%12.5%
(t = Specified Wall Thickness; D = Specified Outside   Diameter)
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