SA 213 t91 tube

SA 213 t91 tube

Stainless steel that is austenitic-ferritic is classified as SA 213. Cr, C, Mn, Ni, Si, Mo, and N, including a few more minor components make up the chemical makeup of the SA 213 T91 Tube.

An SA213 T91 metal utilized in the manufacturing of such tubes gives them exceptional capabilities for tolerance to corrosion and oxidation. sa213 t91 boiler tube has excellent toughness and strength as a result.

They have improved mechanical qualities by layout. The SA213-T9 alloy steel tube has a required yield strength of 205Mpa as well as a minimum tensile strength of at least 415Mpa. A seamless tube is stronger than welded pipes because it is produced from a single piece of steel rather than two.

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To compare prices consider renowned sa213 t91 boiler tube suppliers in UAE and compare sa213 t91 vs t22

SA 213 T91 tube specification

SA 213 T91 Tube Specification

SA 213 T91 tubesize range T91 tube length ASTM A213 T91 tube equivalent & other trade name
  • Nominal pipe size : 1/8” to 5” NPS
  • Wall thickness: 0.500″

For split to size material please contact above listed SA 213 T91 tube suppliers in UAE & get a quick quote

  • 6 meters
  • 12 meters
  • Single random lengths (4 – 8 meters)
  • Double random lengths (8 – 13 meters)
  • Custom length or cut to length to save wastage
  • DIN 1.4903
  • UNS K91560
  • Heater Tube – ASTM A213 Gr T91
  • Seamless pipe: ASTM A335 P91
  • Equivalent Materials -T91, K90901, P91, K91560
  • Equivalent Standards – ASME SA213, ASTM A335, ASTM A213, DIN 17175, BS 3059
  • Standard – EN 10216-2
  • Material – X10CrMoVNb9-1, 1.4903, 9Cr-1Mo-V-Nb
A213 T91 material SA213 T91 hot formed tubes tempering temperature T91 boiler tube condition of delivery
  • Alloy Steel
  • Chrome Moly Alloy
  • IBR Certified ASME SA213 T91 Seamless Tubing
  • 730-800°C
  • 1350-1470°F
  • GBK – Annealed
  • NBK – Normalized
  • BK- Hard/ Cold-finished
  • BKW – Soft/ Cold-finished
Manufacturing method of SA 213 Gr T91 seamless tube SA213 T91 tube material required quality test SA213T91 tube applications & uses
  • Cold drawn seamless A213 T91 tube
  • Hot finished seamless ASTM A213 Gr T91 tube

Above SA 213 T91 tube suppliers have successfully supplied to Qatar, Oman, Saudi Arabia, UAE, Egypt and many other countries with ZERO rejection rate

  • Bend Test
  • Hardness test
  • Hydrostatic Test
  • Flattening test
  • Tensile mechanical test
  • Nondestructive Electric Test

All aboveSA 213 T91 tube suppliers are verified, they offer third party inspection, MTC EN 10204 3.1 and IBR certificate with delivery in UAE & Middle east countries

  • Heat exchangers
  • Power generation
  • Fossil fuel plants
  • High pressure steam pipeline
  • Superheated pipelines
  • Boilers for super heaters
  • Electric power plants
  • Boiling water tube
  • Aircraft industry
European standard of ASTM A213 Gr T91 seamless ferritic alloy tubes T91 steel tube approved ex-stock Heat treatment methods of ASME SA213 T91 tube
  • EN 10216-2 (SA213 T91 seamless tube)
  • EN 10217-2 (ASTM A213 T91 ERW tube)
Above listed SA 213 T91 tube suppliers offer ex-stock in in middle east with the following approvals

  • PDO
  • KOC
  • Saudi Aramco
  • Pemex
  • Petronas
  • Qatar Gas
  • Petrobras
  • Tempering
  • Acid cleaning
  • Annealing
  • Spray rust removal
  • Cleaning
  • Quenching

find the top stockists who maintain cut-to-size alloy steel sa213-t9 tube in Dubai and checks the a213 t91 hot finished tube temperature range

ASTM A213 Gr T91 furnace tubes manufacturers & brand list

A213 T91 heater tube manufacturers Origin / Country

T91 steel cold drawn tube important elements comparison

Elements SA 213 T91 Boiler Tube SA 213 T12 SA 213 T11 SA 213 T22
Sulfur (S) 0.01 0.025 0.025 0.025
Chromium / chrome (Cr) 8.0-9.5 0.80-1.25 1.00-1.50 1.90-2.60
Silicon (Si) 0.20-0.50 0.5 0.50-1.00 0.5
Carbon (C) 0.07-0.14 0.05-0.15 0.05-0.15 0.05-0.15
Phosphorus (p) 0.02 0.025 0.025 0.025
Molybdenum/ Moly (Mo) 0.80-1.05 0.44-0.65 0.44-0.65 0.87-1.13
Manganese (Mn) 0.30-0.60 0.30-0.61 0.30-0.60 0.30-0.60
Yield strength
  • 60 KSI
  • 415 MPa
  • 32 KSI
  • 220 MPa
≥205 MPa ≥220 MPa
Tensile strength
  • 85 KSI
  • 585 MPa
  • 60 KSI
  • 415 MPa
≥415 MPa ≥415 MPa
Temperature range 590°C 650-730°C 650°C 675°C

Mill tolerance for hot formed UNS K91560 T91 tubes wall thickness

SA213T91 NPS or DN A213 T91 Tolerance
% from Specified)
Over Under
  • 1/8 NPS to 2 1/2 NPS [6 to 65] inclusive
  • all t/D ratios
20.0% 12.5%
  • Above 2 1/2 NPS [65]
  • t/D < or = 5%
22.5% 12.5%
  • Above 2 1/2 NPS [65]
  • t/D > 5%
15.0% 12.5%

  • t means = Specified SA 213 Gr T91 tubing wall thickness
  • D means = Specified T91 boiler tube outside diameter

Permissible variation of SA213 T91 boiler tube OD

SA213 T91 NPS or DN Over Under
inch mm inch mm
  • 1/8 NPS to 1 1/2 NPS [6 to 40], including
1/64 (0.015) 0.40 1/64 (0.015) 0.40
  • Over 1 1/2 NPS to 4 NPS [40 to 100], including
1/32 (0.031) 0.79 1/32 (0.031) 0.79
  • Over 4 NPS to 8 NPS [100 to 200], including
1/16 (0.062) 1.59 1/32 (0.031) 0.79
  • Over 8 NPS to 12 NPS [200 to 300], including
3/32 (0.093) 2.38 1/32 (0.031) 0.79
  • Over 12 NPS [300]
+/- 1% of the specified T91 outside diameter

T91 high temperature tube marking

Marking heading
Grade/ material
Manufacturer’s Heat Number
Test name
  • S1 – SA 213 T91 Analysis
  • S2 – UNS K91560 A213 T91 Transverse Tension Test
  • S3 – Flattening Test of SA213 T91 material
  • S4 – Etching Tests & Metal Structure
  • S5 – Photomicrographs
  • S6 – A213 T91 Photomicrographs for Individual Pieces
  • S7 – Alternative Heat Treatment – only for ASTM A213 T91 (type 1 and 2)
Indicate ASME SA213 T91 test method
  • Test Pressure – if Hydrostatic yes, Nondestructive No
  • NDE – if Hydrostatic No, Nondestructive Yes
  • NH – if Hydrostatic No, Nondestructive No
  • Test Pressure/NDE – if Hydrostatic yes, Nondestructive yes

SA213 T91 material composition

Cr P Mo Si V C Mn S N
8.0-9.5 ≤0.02 0.85-1.05 0.2-0.5 0.18-0.25 0.07-0.14 0.3-0.6 ≤0.01 0.03-0.07

Mechanical properties of SA 213 T91 tube

Grade UNS
min, ksi
min, ksi
in 2 in. or
50 mm,
min, %
Brinell/Vickers Rockwell
T91 K90901 60 [415] 85 [585] 20 190 to 250 HBW/
196 to 265 HV
90 HRB to 25

T91 boiler tube heat treatment requirements

Grade UNS
Heat treat type Subcritical Annealing or Tempering Temperature,
min or range ºF [ºC]
Austenitizing/ Solutioning Temperature,
min or range ºF [ºC]
T91 K90901 Normalize and temper
  • 1350-1470 [730-800]
  • 1900-1975

SA 213 T91 Tube Properties

SA213 T91 equivalent

Standards Country SA 213 T91 Tube
UNS North America K90901
WNR Russia 1.4903
ASTM America A213
ASME Australia SA 213
JIS Japan
BS United Kingdom
GOST Russia 550-75
AFNOR France
EN Europe X10CrMoVNb9-1
DIN German 1.4903

Speak to many trustworthy importers to find out who has the best-priced alloy steel UNS k90901 seamless boiler tube in stock and see sa213 t91 material properties

Incorporating 0.08–0.12 C, 0.30-0.60 Mn, 0.01 Sulphur, 0.025 P, and 0.85–1.05 Mo, SA213 T91 Boiler Tubing complies with Astm norms and has characteristics like a minimum tensile property of 585 Mpa as well as a minimal level yield strength of 415 Mpa. The inclusion of alloys & carbon gives SA213 T91 Tubing its excellent tolerance to corrosion and great strength over extreme temps. As a result, it can handle requirements for high pressure as well as high temperature. Boiler settings that require complicated compliance, such as stress, heat, thermal pass site, steaming frequency, and flow patterns, include several classes of boiler tubes that are suitable for various types of boilers.

The trade name for t91 tubes is UNS K90901, whereas the brand name for t22 pipes is UNS K21590. The distinction is only due to the elemental makeup of it. In comparison to UNS K21590 alloy steel seamless boiler tube, UNS K90901 alloy steel seamless boiler tube contains less silicon, phosphorus, and Sulphur. In contrast to SA213 T22 material- SA213 T91 material contains trace amounts of extra nickel. In comparison to SA 213 T91 Boiler Tube- SA213 T91 Boiler Tube contains more chromium and molybdenum. Both classes have roughly the same amount of carbon.

The A213 T91 Hot Finished Tube is intended for use in situations that demand tolerance to high temperatures and high pressures. Such pipes could be found with a length of up to 22.5 meters and are processed at temperatures exceeding 2000 degrees Celsius. High-quality components are utilized to construct the SA 213 T91 Heat Exchanger Tube so that it can withstand high tension and temperatures.The SA 213 T91 Low Alloy Steel Round Tubes are Suitable for Use Permanently in Installations With heat Up To 590°C. Alloy SA213 T91 can be used to refine precision mechanical tubes. Over 2000° Celsius is used to process these pipes.

Are you trying to find traders of sa213 t91 boiler tubing in unique dimensions and sizes in GCC countries? You’re in the proper place now. and find out the cutting process

Additionally, single-randomized, double-randomized, or bespoke cut-to-length tubing measurements are used to assess the tube length. The seamless tubes can be cut using a variety of techniques, such as shearing, cracking, cutting, flame splitting, and anode cutting. They have the following traits:

  • The seamless tube is worn, and the cutting grade is substandard, but the flame-cutting process offers the cheapest operating costs.
  • Shearing is a common process for slicing low-carbon, moderate-carbon, continuous, & alloy steel frame pipes.
  • A breaking press is a tool utilized in the cracking technique.
  • For sawing stainless steel tubes and high-pressure metal tubes, saw cutting seems to be the cutting technique with the greatest cutting performance.
The prices and turnaround times of various ASTM a213 t91 seamless tube traders can be compared here. View the pros and cons of sa213 t91 tubing

The following benefits of T91 steel’s efficiency make it popular for usage in high-parameter high heat power generating units:

  • Steel has a low-temperature expansion coefficient & high heat conductivity when related to stainless steel.
  • At room temp, the alloy has excellent tensile strength, and it also has high plasticity.
  • As is common knowledge, everything that has benefits also has drawbacks. The ASME SA213 T91 Seamless Tubing is also vulnerable to leaks. Long-term excessive heat (LTO-C) damage and steam are the main factors in T91 SH/RH tube problems. During the hot rolling & cold drawing processes, the innermost layer of the metal pipe creates a lengthwise linear flaw.