ASTM A335 Grade P91 NACE

ASTM A335 Grade P91 NACE Alloy Seamless Pipes at Eckhardt Steel & Alloys

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ASTM A335 Alloy Steel Pipe grades:

ASTM A335 Grade P91 NACE Alloy Seamless Pipes stockist & suppliers

Eckhardt Steel & Alloys is a leading manufacturer & exporter of ASTM A335 Grade P91 NACE Alloy Seamless Pipes & new alloy steel pipe to energy producers, pipeline operators, and project management firms around the world. We carry a wide range of sizes, grades, tensile strengths, and weld seems within an impressive inventory of new steel pipe. Large OD used steel pipe is our specialty!
We supply 2″-48″ diameter steel pipe in prime ASTM A335 Grade P91 NACE Alloy Seamless Pipes, API-5L grades x42, X52, API 5L X65, X70, and X80 as well as ASTM A106-A500 Grade B and Grade C. We also supply seamless, ERW, LSAW, DSAW, and Spiral Weld pipe. It is important to deal with a reputable pipe distributor or pipe supplier who is familiar with all variations of steel pipe and can who can match you with the right product for your need.

ASTM A335 Grade P91 NACE Alloy Seamless Pipes Specification

Our goal is to fulfill the highest expectations of our customers for delivery and product quality of ASTM A335 P12 Alloy Steel Pipes. Information for those interested in buying ASTM A335 Grade P91 NACE Alloy Seamless Pipes. the most trusted source of ASTM A335 P12 Alloy Steel Pipes, More about Eckhardt Steel & Alloys for API 5L Pipe & Tubes.

Eckhardt Steel & Alloys is one of the major Indian manufacturers, exporter & suppliers of ASTM A335 Grade P91 NACE Alloy Seamless Pipes& OCTG, CRA (Corrosion-Resistant Alloy) Seamless Tubes, Stainless Steel, Super Duplex, Duplex, Welded & Semaless, Carbon Steel Seamless Pipes, Tubes, Capillary Pipes & ‘U’ Tubes for applications in oil & gas, LNG, Thermal & Nuclear Power Plants, Chemical Industries, Fertilizers Plants, (petro) chemical, shipbuilding, desalination, water treatment, energy industries, EPC and Pipes for General Engineering Purpose.

Alloy Seamless Pipes (ASTM A335 Grade P91 NACE) offered by us are made available in ASTM A335 Grades. Made as per IBR standards, these are mainly used in boiler operations. Further, our expertise lies in offering these pipes in various size range as well as in customized parameters as per boiler piping requirements. Sourced from quality conscious manufacturers, we also offer our clients the option of adding their own mark on them.

Materials:
20G.ASTM A106B. ASME SA106B. 12Cr1MoV.15CrMo.
T91.P91.P22.P11.T22.T12.P9.P5.P1.P92.35CrMo. Cr5Mo. 16Mn. WB36. 27SiMn. 10CrMo910.

American Society of Mechanical Engineers Standard:
ASME SA106, ASME SA53, ASME SA335, ASME SA210, ASME SA333, ASME SA213

American Society for Testing and Materials Standard:
ASTM A106. ASTM A53. ASTM A333. ASTM A210. ASTM A213. ASTM A335.

pipe production standards in accordance with HG , GB , SH , HGJ , JB ,ANSI , JIS , DIN and other international standards.

ASTM A335/A335M-P91 high temperature ferritic alloy steel seamless P91

Standard Steel grade Yield strengthM P a Tensile M Pa Elongation Min (vertical bar specimen )% (1) Elongation Min (round bar specimens )% Squash
ASTM A335/A335M-03 “high temperature ferritic alloy steel seamless” P1, P2 ≥ 205 ≥ 380 30 22 H
P12 ≥ 220 ≥ 415 30 22 H
P23 ≥ 400 ≥ 510 20 20 H
P91 ≥ 415 ≥ 585 20 20 H
Other ≥ 205 ≥ 415 30 22 H
Note: (1) using the vertical bar specimens, the wall thickness of less than 8mm, each reduction 0.8mm, P23, P91 should subtract the base elongation of 1.0%, 1.5%, minus all other grades.
Standard Steel grade Yield strengthM P a Tensile M Pa Elongation% Squash
ASTM A500-2001 “Structural carbon steel cold-formed and shaped circular cross-section welded steel pipe and seamless steel pipe.” Grade A ≥ 228 ≥ 310 ≥ 25 H
Grade B ≥ 290 ≥ 400 ≥ 23 H
Grade C ≥ 317 ≥ 427 ≥ 21 H
Grade D ≥ 250 ≥ 400 ≥ 23 H
Standard Steel grade Yield strengthM P a Tensile M Pa Elongation% Squash Flaring
ASTM A556M-96 “water heater with carbon steel cold drawn seamless steel tubes.” A2 ≥ 180 ≥ 320 ≥ 35 H H
B2 ≥ 260 ≥ 410 ≥ 30 H H
C2 ≥ 280 ≥ 480 ≥ 30 H H
Standard Steel grade Yield strength Tensile strength Elongation (%) (1)
JIS G 3473-1988 “Carbon steel cylinder” STC370 ≥ 215 ≥ 370 ≥ 30 Note: (1) thickness <8mm pipe, elongation is reduced by the minimum thickness at 1mm, to subtract the elongation of 1.5%.
STC440 ≥ 305 ≥ 440 ≥ 10
STC510A ≥ 380 ≥ 510 ≥ 10
STC510B ≥ 380 ≥ 510 ≥ 15
STC540 ≥ 390 ≥ 540 ≥ 20
STC590A ≥ 490 ≥ 590 ≥ 10
STC590B ≥ 490 ≥ 590 ≥ 15
Standard Steel grade Yield strengthM P a Tensile M Pa Elongation %(1) Squash
JIS G 3467-1988 “furnace with steel.” STF410 ≥ 245 ≥ 410 ≥ 24 0.08  Note: (1) using vertical bar specimens, the wall thickness of less than 8mm, each reduced 1mm, from the basic minimum elongation shall be subtracted 1.5%.
STFA12 ≥ 205 ≥ 380 ≥ 24
STFA22 ≥ 205 ≥ 410 ≥ 24
STFA23 ≥ 205 ≥ 410 ≥ 24
STFA24 ≥ 205 ≥ 410 ≥ 24
STFA25 ≥ 205 ≥ 410 ≥ 24
STFA26 ≥ 205 ≥ 410 ≥ 24
Standard Steel grade Yield strengthM P a Tensile M Pa Elongation %(1) Squash
JIS G 3462-1988 “boilers, heat exchangers used in steel pipe.” STBA12 ≥ 205 ≥ 380 ≥ 30 0.08
Other ≥ 205 ≥ 410 ≥ 30
 Note: (1) using vertical bar specimens, the wall thickness of less than 8mm, each reduced 1mm, from the basic minimum elongation shall be subtracted 1.5%.
Standard Steel grade Wall thickness mm Yield strength M Pa Tensile M Pa Elongation% (1) Flattening / Flaring
JIS G 3461-1988 “boilers, heat exchangers used in carbon steel.” STB340 ≥ 8 ≥ 175 ≥ 340 ≥ 35 H
STB410 ≥ 8 ≥ 255 ≥ 410 ≥ 25 H
STB510 ≥ 8 ≥ 295 ≥ 510 ≥ 25 H
 Note: (1) using vertical bar specimens, the wall thickness of less than 8mm, each reduced 1mm, from the basic minimum elongation shall be subtracted 1.5%.
Standard Steel grade Yield strengthM P a Tensile M Pa Elongation (vertical bar specimen ) %(1) Elongation (round bar specimens )% Squash Note: (1) using vertical bar specimens, the wall thickness of less than 8mm, each reduced 1mm, from the basic minimum elongation shall be subtracted 1.5%.
JIS G 3456-1988 “high carbon steel pipes.” STPT370 ≥ 215 ≥ 370 ≥ 30 ≥ 28 0.08
STPT410 ≥ 245 ≥ 410 ≥ 2 5 ≥ 24 0.07
STPT480 ≥ 275 ≥ 480 ≥ 2 5 ≥ 22
Standard Steel grade Yield strength Tensile strength Elongation (tube sections and longitudinal strips sample) % (1) Elongation (round bar specimens )% Squashed or bent
JIS G 3455-1988 “high carbon steel pipes.” STS370 ≥ 215 ≥ 370 ≥ 30 ≥ 28 H
STS410 ≥ 245 ≥ 410 ≥ 25 ≥ 24 H
STS480 ≥ 275 ≥ 480 ≥ 25 ≥ 22 H
 Note: (1) using vertical bar specimens, the wall thickness of less than 8mm, each reduced 1mm, from the basic minimum elongation shall be subtracted 1.5%.
Standard Steel grade Yield strengthM P a Tensile M Pa Elongation (vertical bar specimen )% (1) Elongation (round bar specimens )% Squash
JIS G 3454-1988 “pressure pipes carbon steel pipe.” STPG370 ≥ 215 ≥ 370 ≥ 30 ≥ 28 0.08
STPG410 ≥ 245 ≥ 410 ≥ 2 5 ≥ 24 0.07
 Note: (1) using vertical bar specimens, the wall thickness of less than 8mm, each reduced 1mm, from the basic minimum elongation shall be subtracted 1.5%.

P91 alloy tube

Material Implementation of standards Specification Quantity
P91 GB5310-2008 426 * 18 3
P91 ASTMA335-95a 426 * 18 2
P91 GB5310-2008 426 * 16 3
P91 ASTMA335-95a 426 * 14.2 3
P91 GB5310-2008 426 * 14 3
P91 GB5310-2008 426 * 13 2
P91 GB5310-2008 426 * 13 5
P91 GB5310-2008 426 * 12 2
P91 ASTMA335-95a 426 * 12 5
P91 ASTMA335-95a 426 * 11 5
P91 GB5310-2008 426 * 11 3
P91 ASTMA335-95a 426 * 10 5
P91 ASTMA335-95a 406.4 * 80 3
P91 GB5310-2008 406.4 * 65 3
P91 ASTMA335-95a 406.4 * 50 3
P91 GB5310-2008 406.4 * 50 5
P91 GB5310-2008 406.4 * 45 2
P91 GB5310-2008 406.4 * 40 3
P91 GB5310-2008 406.4 * 32 1

Elongation Requirements

Calculated Minimum Elongation Values
Elongation in 2 in. or 50 mm, min %
Wall Thickness P5, P9, P11, P22 P91
in. mm Longitudinal Transverse Longitudinal
5/16 (0.312) 8 30 20 20
9/32 (0.281) 7.2 28 19 19
1/4 (0.250) 6.4 27 18 18
7/32 (0.219) 5.6 26 17
3/16 (0.188) 4.8 24 16
5/32 (0.156) 4 22 15
7/8 (0.125) 3.2 21 14
3/32 (0.094) 2.4 20 13
1/18 (0.062) 1.6 18 12


Mechanical Tests Specified

Transverse or Longitudinal Tension Test and Flattening Test, Hardness Test, or Bend Test
For material heat treated in a batch-type furnace, tests shall be made on 5% of the pipe from each treated lot.  For small lots, at least one pipe shall be tested.
For material heat treated by the continuous process, tests shall be made on a sufficient number of pipe to constitute 5% of the lot, but in no case less than 2 pipe.
Notes for Hardness Test: P91 shall not have a hardness not exceeding 250 HB/265 HV [25HRC].
Notes for Bend Test: For pipe whose diameter exceeds NPS 25 and whose diameter to wall thickness ratio is 7.0 or less shall be subjected to the bend test instead of the flattening test.
Other pipe whose diameter equals or exceeds NPS 10 may be given the bend test in place of the flattening test subject to the approval of the purchaser.
The bend test specimens shall be bent at room temperature through 180 without cracking on the outside of the bent portion.
The inside diameter of the bend shall be 1 inch [25 mm].
Hydrostatic Test Each length of pipe shall be Hydro tested, at option of manufacture nondestructive electric testing can be used.

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]

Types of Packaging:

  • - Bundles (hexagonal)
  • - Wooden Boxes
  • - Crates (steel/wooden)
  • - Special crates for U-Bend tubes with each radius separated
  • - Packaging for ASTM A335 Grade P91 NACE Alloy Seamless Pipes as per customer’s requirements

Special Features:

  • - Each bundle covered with plastic for protection against extreme weather.
  • - End of ASTM A335 Grade P91 NACE Alloy Seamless Pipes protected by plastic caps.
  • - Bundles strapped with plastic strips.
  • - Each radius of U-Bend tube separated by a separator.
  • - Packaging list (laminated) placed with box/crate.

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