ASTM A335 Grade P91, ASME SA213 Grade T91 Seamless Pipes And Tubes
ASTM A-335 Grade P-91, ASME SA-213 Grade T-91 Seamless Pipe And Tube
Manufacture of ASTM A335 Grade P91 Seamless Pipes
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Stockholder of ASTM A335 Grade P91 Seamless Pipes
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Distributor of ASTM A335 Grade P91 Seamless Pipes
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Importer of ASTM A335 Grade P91 Seamless Pipes
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ASTM A335 Grade P91 Drill Pipe SA335 Grade P91 Seamless Pipes
SA335 GR P91 Piping Material ASME SA335 GR P91 Welded Pipes
SA 335 GR P91 IBR Pipe Line ASME SA335 Grade P91 Erw Pipes
ASTM A335 P91 Pipe IBR Alloy Steel P91 Alloy Pipe
ASME SA335 P91 Seamless Pipe SA335 Grade P91 IBR Grade Pipe
A335 P91 Welded Pipe SA335 GR P91 Boiler Pipes
ASTM A335 GR P91 Erw Pipe SA 335 GR P91 Used Pipe
SA335 P91 Boiler Pipe ASME SA335 P91 High Pressure Pipe
ASTM A335 P91 Material Alloy Steel P91 Rolled Pipe
ASTM A335 P91 Alloy Steel Pipe Material A335 P91 Pipes
A335 Grade P91 High Pressure Pipes Alloy Steel P91 IBR Steam Pipe Line
ASTM A335 P91 Rolled Pipes ASTM A335 GR P91 Round Pipe
ASME SA335 P91 Flexible Pipe SA335 P91 Square Pipe
Alloy Steel P91 Large Diameter Pipes ASTM A335 P91 Radiator Pipe
ASTM A335 Grade P91 Large Diameter Pipe Clamps A335 Grade P91 Turbo Pipe
A335 P91 Pipe Sch 40 SA 335 GR P91 Scaffold Pipe
IBR Certified P91 Grade Steel Pipes Alloy Steel P91 Plain End Pipe
ASTM A335 P91 Alloy Steel Double Random Pipe ASME SA335 P91 Pipe For Oil and Gas IndusSA 335 GR P91 Pipe Sch 60
ASME SA335 GR P91 Sch40 Pipe
ASTM A335 P91 Alloy Steel Hydraulic Pipe 4 Inch ASTM A335 GR P91 Pipe
P91 Alloy Beveled End Pipe 3 Inch SA335 P91 Pipe
Alloy Steel P91 Cut Length of Pipe P91 Steel Threaded Pipe
ASME SA335 Grade P91 IBR Pipes SA335 GR P91 Rectangular Pipe
P91 Alloy Plain End Drill Pipe Grade P91 Pipe
A335 GR P91 IBR Approved Pipes ASME SA335 Grade P91 Single Random LenASME SA335 GR P91 Pipe Sch 80 Nace SA335 P91
Nuclear Power Plants Steam PipesASTM A335 Grade P91 Pipe Sch 20 P91 Steel Pipe For Oil Tank
Large Diameter Steel Grade P91 Pipe Sleeve A335 P91 Plain End Beveled Pipe
Alloy Steel P91 Oil & Gas Piping Grade P91 Pipe For Liquid Nitrogen
Alloy Steel A335 P91 Pipe For Liquid Propane A335 GR P91 Fill Pipe for Oil Tank
Nuclear Power Plants A335 GR P91 Pipes P91 Alloy IBR Steam Pipe
ASME SA335 GR P91 IBR Piping SA335 Grade P91 Oil & Gas Pipeline
Alloy Steel P91 IBR Piping Material SA335 GR P91 Pipe For Oil Rig
ASME SA335 Grade P91 Pipe For Oil and Gas P91 Steel IBR and Non IBR Piping
Grade P91 IBR Steam Piping Alloy Steel P91 Pipe Sleeve For Gas Pipe
P91 Grade Steel Fluid Pipe Material ASTM A335 Grade P91 IBR Pipe Material
SA335 Grade P91 Pipe Sleeve P91 Grade Steel Pipe For Gas Line
A335 GR P91 Gas Pipe Sleeve ASTM A335 P91 Alloy Steel Fluid Pipe
P91 Alloy Steel Pipe Sleeve Material Steel Grade P91 Flexible Pipe For Conveying A335 Grade P91 Pipe Conveying Fluid Or
Gas P91 Grade Steel Pipe For Water
IBR Approved P91 Alloy Steel Pipe A335 Grade P91 IBR Pipe
Characteristics of ASTM A335 P91 Type 2
P91 is a chrome moly alloy metal that contains excellent strength and temperature resistance. It is designed for enhanced creep strength,
making it a creep strength enhanced ferritic (CSEF). This metal is made by normalizing at 1050 °C, air cooling to 200 °C, and then
tempered through heating to 760 °C. This process is the main reason behind P91’s creep strength and durability. P91 stands for the
metal’s composition of 9% chrome and 1% molybdenum plus vanadium. The chrome increases temperature strength and oxidation resistance.
The molybdenum increases the elasticity, resistance to wear, and high temperature creep strength. More characteristics to note of ASTM A335 P91 Type 2:
Non-deteriorating
Decreased thickness
Higher creep strength
Applications of ASTM A335 P91 Type 2
U.S. Metalscan meet your ASTM A335 P91 Type 2 requirements when it comes to fittings,tubing, flanges, valves, and much more.
This metal is made and typically usedfor very high heat situations in industries such as chemical processing andpower plants.
Some more common uses of ASTM A335 Type 2 include
Power generation
Gas processing equipment
Oil services
Petrochemical plants
Heaters/reheat lines
Boilers
About ASTM A335 P91 Pipe
Trade Name: P91
Grade: P91
UNS #: K91560
Pipe: A335/SA335
Forged/Bored Pipe: A369/SA369
Length: Specific or random
A335/SA335 P91 is a ferritic alloy steel that has very high strength properties, which do not deteriorate with time, and are creep resistant.
It is also called 9 Cr 1 Mo steel, or chrome moly pipe, based on its composition.
Compared to its predecessors, the T22 or P22 grade, grade P91 exhibits high strength, enduring temperatures up to 600 °C.
The oxidation temperature limits are also higher allowing elements to be engineered with less thickness. This contributes to an
almost 10 times higher thermal fatigue life and allows engineers to increase the operating temperature to a higher level, increasing efficiency.
P91 typically allows a wall thickness reduction by at least a 2-to-1 ratio. A wall that is thinner creates lighter hanger loads, less welding
time and uses less filler metal.
These advantages are enabled by this steel’s high amount of chromium. Grade 91 contains 9% chromium and 1% molybdenum
compared to 2.5% chromium in the next best P22 grade
P91 Pipe Chemical Requirements
Carbon – 0.08% – 0.12%
Manganese – 0.30% – 0.60%
Phosphorus, max – 0.020%
Sulfur, max – 0.010%
Silicon, max – 0.20% – 0.50%
Chromium – 8.00% – 9.50%
Molybdenum – 0.85% – 1.05%
Vanadium: 0.18% – 0.25%
Nitrogen: 0.030% – 0.070%
Nickel: 0.40% Max
Aluminum: 0.02% Max
Columbium: 0.06% – 0.10%
Titanium: 0.01% Max
Zirconium: 0.01% Max
Chromium, or chrome, improves high-temperature strength and increases oxidation resistance. It is virtually irreplaceable in resisting
oxidation at elevated temperatures. Chrome also raises the tensile, yield and hardness at room temperatures.
Molybdenum increases the strength, elastic limit, resistance to wear, impact qualities and hardenability. It increases the resistance to
softening, restrains grain growth and makes chromium steel less susceptible to embrittlement. Moly is also the most effective additive
for increasing high temperature creep strength, or creep resistance. It also enhances the corrosion resistance of steel and inhibits pitting.
Also present are smaller quantities of nickel and manganese which increase the hardenability of the steel.
The addition of Vanadium (V) and Columbium/Niobium (Cb/Nb) as well as the control of Nitrogen (N) greatly Improves Creep Strength.
More important than the alloying elements is the formation of this alloy steel. The steel is formed by normalizing at 1050 °C, then air cooling
down to 200 °C. It is then tempered by heating to 760 °C. The temperatures and cooling rates produce the microstructure that results in the
high creep strength properties.
P91 Pipe Specifications
Tensile strength, min, PSI, (MPa) – 85,000 (585)
Yield Strength, min, (MPa) – 60,000 (415)
P91 Pipe Applications
A335/SA335 P91 is suitable for bending, flanging (vanstoning), and similar forming operations and for fusion welding. P91 is most commonly
used in the power industry and petrochemical plants where fluids and gases are transported at extremely high temperatures and pressures.
P91’s strength and high temperature endurance makes it ideally suitable for plants that operate on a cyclic basis – like combined cycle plants.
Also, the reduction in thickness suits HRSG designers, in an HRSG the temperature head is limited and locating the coils in the heat transfer
path is very critical.
P91 is the correct grade for:
Power generation
Petrochemicals
Gas processing
Petrochemical Plants
Heaters
Oilfield services
P91 Welding Procedure
When welding P91, preheating, maintaining inter-pass temperatures and post-weld treatment procedures are essential to
maintain the P91 grade. Welding has an important effect on the microstructure and failure to follow the procedures will result in catastrophic failures.
For thick-walled pipes, the use of a modern induction heating system – where the coils do not heat up – is the ideal method.
This gives better control, and uniform heating between the inner and outer diameters. Induction heating is ideal for maintaining the
inter-pass temperatures and carry out the welding. This is also a more worker-friendly heating process and is ideal for complex
shapes like weldolets and tees.
The composition of the welding electrodes used should always be in line with the parent material. The nickel and manganese content
of P91, though in smaller percentages, has profound effects on the critical temperatures, which decides the heat treatment temperatures
and the cooling rates.
Steel that has not been heat-treated has a great affinity to hydrogen which can cause stress corrosion cracking. Pre-heating must be done
properly to remove any moisture. In addition, the post-weld heat treatment must be done as quickly as possible to avoid any contact with
moisture from condensation, rainfall, etc. Be sure all joints are post-weld heat treated prior to hydro test.
Dissimilar weld joints – especially at complicated geometries – can result in the heat treatment not having the desired affect throughout the
cross sections. This can also lead to failures.
X10CrMoVNb9-1 – 1.4903 – LW 1.4904 – 10CrMoVNb
X10CrWMoVNb9-2 – 1.4901
A 182 Grade F911 – A 213 Grade T911 – SA 335 Grade P911 – K91061
A 335 Grade P91 – SA 355 Grade P91 – K91560
A 387 Grade 91 – SA 387 Grade 91
A 335 Grade P92 – SA 182 F92 – A 182 Grade F92 – K92460 – A213 T92
K90901 – 9Cr1Mo – A 182 F91 – SA 182 Grade F91 – A 213 T91 – SA 213 grade T91
X10CrMoVNb9-1, 1.4903 – Boiler steel
X10CrMoVNb9-1 and equivalent P91 / T91, F91 are high-alloy species designed to work at elevated temperatures with a martensitic structure.
The most common ones in the form of seamless pipes, bars, sheets or forged elements are used in the production of installations, pipelines,
boilers and other components of power equipment operating at temperatures of 540-580C.X10CrMoVNb9-1 steel is becoming more and more
popular due to much better mechanical properties, resistance to creep, corrosion, impact resistance and thermal fatigue. In contrast to the
well-known, proven boiler species, 1.4903 should be classified as high-alloyed heat-resistant boiler steel due to the increased content of Chromium,
Molybdenum, and small amounts of Vanadium and Niobium.It’s price in relation to standard grades such as 14MoV6-3 is certainly higher, however,
along with the price, the length of service life and higher material durability also increases.1.4901 / X10CrWMoVNb9-2 / 92 is an improved version
of the P91 / T91 / F91 material with a 2% addition of Tungsten, a slightly increased amount of Chromium, and a reduced content of Molybdenum,
characterized by a creep resistance at temperatures of up to 600C higher by about 1/3. The material has even higher corrosion resistance and
weldability. It is used at the highest operating temperatures up to 650C.Grade 91/92 – Steel used for production of boiler components with supercritical
and ultra-critical parameters – jackets, connectors for steam superheater outlet chambers, superheated steam superheaters, turbine shaft parts,
chambers and pipelines for fresh and superheated steam, superheater coils, steam collectors, outlet collectors, fittings and sleeves for the installation
of boilers, connectors, pipelines of modern power units operating at temperatures of approximately 550-640C and steam pressures of approx. 18-30 MPa.
General properties of X10CrMoVNb9-1, 1.4903:
Tensile strength, Rm: 620 – 850 MPa The yield point, Re: > 450 MPa Elongation, A: >20% Modulus of elasticity E = 218 GPa
Thermal conductivity, λ: 14 W * m-1 * K-1 Linear expansion coefficient, α: 10,9 * 10-6 K-1
X10CrMoVNb9-1, 1.4903 – mechanical properties for pipes in the +NT condition
Tensile strength, Rm: 630 – 830 MPa The yield point, Re: > 450 MPa Longitudinal samples Elongation, A: >19% Impact resistance,
KV20℃: > 40J Transverse samples Elongation, A: >17% Impact resistance, KV20℃: > 27J
Mechanical properties for flat products X10CrMoVNb9-1, 1.4903
In the +NT delivery condition Tensile strength, Rm: 550 – 760 MPa The yield point, Re: > 435 MPa Elongation, A: >18% Impact resistance,
KV20℃: > 40J Impact resistance, KV0℃: > 34J Impact resistance, KV-20℃: > 27J In the +QT delivery condition Tensile strength,
Rm: 520 – 700 MPa The yield point, Re: > 435 MPa Elongation, A: >18% Impact resistance, KV20℃: > 40J Impact resistance,
KV0℃: > 34J Impact resistance, KV-20℃: > 27J
Mechanical properties for forgings X10CrMoVNb9-1, 1.4903
Tensile strength, Rm: 630 – 730 MPa The yield point, Rp0,2: > 450 MPa Impact resistance and elongation – longitudinal samples
KV0℃: > 40J A: > 19% Impact resistance and elongation – transverse samples KV0℃: > 27J A: > 17%
Heat treatment – process and temperature
Normalizing at 1040 – 1100 ℃ with cooling in air or oil Tempering at a temperature of 730 – 780 ℃ with cooling in the airIn the above
mentioned grades the company provides:Hot-rolled seamless and seamed tubes X10CrMoVNb9-1, 1.4903, grade P91, P92, T91
Hot-rolled bars X10CrMoVNb9-1, 1.4903 Forging and forged rings X10CrMoVNb9-1, 1.4903 Sheets and flat bars X10CrMoVNb9-1, 1.4903
Other replacements and equivalents of the grade X10CrMoVNb9-1:1.4903, A 1017 GRADE 911, SA 1017 GRADE 911,
A 234 GRADE WP91, SA 234 GRADE WP91, A 336 GRADE F91, SA 336 GRADE F91, A 336 GRADE F911, SA 336 GRADE F911,
A 336 GRADE FP91, SA 369 GRADE FP91, A 387 GRADE 91, SA 387 GRADE 91, UNS K91560, 9CR1MO, UNS K90901, A1012 T91,
A182 F91, A200 T91, A213 T91, A831 T91, SA199 T91, SA213 T91, A1012 T911, A182 F911, A213 T911, A335 GRADE P911, SA182 F911,
SA213 T911, SA335 GRADE P911, UNS K91560, 9CR-1MO-V-CB-N, A335 GRADE P91, A691 GRADE 91, SA335 GRADE P91,
SA691 GRADE 91, 10CRMOVNB, 10CR9MO1VNBN, S31108, 10CH9MFB, 10KH9MFB, 10Х9МФБ, 1.4901, X10CRWMOVNB9-2,
A1012 T92, A182 F92, K92460, SA182 F92, SA213 T92, SA335 GRADE P92, STAL P91, STAL P92, GRADE P91, GRADE P92.
Inspection & Approval Certificates : C/W Certificate (Calibration Works Certificate) EN 10204 3.1 / DIN 50049 3.1 / ISO 10474 3.1 Mill Test Certificate,
NACE HIC TM-0284 / NACE MR-0103 / NACE MR-0175 / ISO 15166, BS EN 9001, BS EN 9100, AS 9100D, IATF 16949, NADCAP Certified, CE Marked,
European Pressure Equipment Directive PED-2014/68/EU, AD-2000-WO, ASME Boiler & Pressure Vessel Code Section-II Part A Edition 2019,
API 6A (American Petroleum Institute), with 3.2 Certificate duly Certified & Approved by IBR (Indian Boiler Regulations), LR Class (Lloyd’s Register),
GL (Germanischer Lloyd), BV (Bureau Veritas), DNV (Det Norske Veritas), ABS Class (American Bureau of Shipping), SGS, TUV, RINA,
IR Class (Indian Register of Shipping), NORSOK Approved Standard M-630, M-650 Rev.3
If you have any requirement of above items, please feel free to contact us
Regards,
CONTACT PERSON :
MUKESH SHAH
Director
Mobile No. 0091 – 9820292499
Email – marketing@rolexmetals.com
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