SA213 TP347 SS Boiler Tube

SA213 TP347H Stainless Steel

SA213 TP347H Stainless Steel is a type of austenitic stainless steel that contains high levels of chromium, nickel, and molybdenum.

It is a modified version of SA213 TP347 with the addition of higher carbon content and an increased amount of niobium. This modification improves the high-temperature strength and corrosion resistance of the steel.

SA213 TP347H is a coarse grain stainless steel. It is widely used for the superheater and reheater tube in USC (ultra-supercritica) coal boilers. It is also used in high temperature operation.

What are the grades of SA213?

202, 304, 304L, 304H, 309S, 310S, 316, 316L, 316H, 316Ti, 316LN, 317L, 321, 321H, 347, 347H.

The SA213 TP347H stainless steel can be annealed at temperatures ranging from 1010 to 1193°C (1850 to 2000°F) and then quenched with water.

FAQs about SA213 TP347H

Q1. What is the maximum temperature SA213 TP347H can withstand?
SA213 TP347H can withstand temperatures up to 1500°C (2732°F).

Q2. Is SA213 TP347H suitable for welding?
Yes, it is suitable for welding, and proper procedures should be followed to maintain its corrosion resistance.

Q3. Where is SA213 TP347H commonly used?
It is commonly used in industries such as power generation, chemical processing, aerospace, and oil and gas.

Q4. How does SA213 TP347H compare to other stainless steel alloys?
SA213 TP347H offers a unique balance of high-temperature strength and corrosion resistance, making it suitable for specific applications.

Q5. What forms is SA213 TP347H available in?
It is available in the form of seamless tubes, pipes, and fittings.

What is SA213 tp347h material?

SA213 TP347 / 347H is a seamless ferritic and austenitic alloy SS (Stainless Steel) boiler tube used in superheaters, and heat exchanger tubes.

TP347H is a stabilized austenitic stainless steel that is used in reheaters, heat exchangers, and superheaters. It is a corrosion-resistant material with a high creep strength. The high carbon content of TP347H gives it extra toughness. The chemical composition of TP347H includes: Silicon, Chromium, Nickel, Columbium +Tantalum.

TP347H has been used as the material of tubes in 600°C USC power plants in China. It can be easily elongated by 40%.

What is the difference between 347 and 347H?

347H is the higher carbon version of 347 plate. Due to the additional carbon present in 347H plate, it is tougher and generally more durable than 347 plate. These grades of stainless steel plate is available in a wide range of sizes at Penn Stainless Products.

This grade of stainless steel has an elongation of 40%. On the Brinell hardness scale 347 and 347H stainless steel plate has hardness of 201 and on the Rockwell B scale, both 347 and 347H have a hardness of 95.

What is the composition of SA213 TP347H Stainless Steel

Both contain between 17.0% and 20.0% chromium, and no more than 2.0% manganese. They are made of between 9.0% and 13.0% nickel. 347 stainless steel plate contains at most 0.04% phosphorous while 347H stainless steel can only contain up to 0.03% phosphorous.

Grade UNS Composition, %
Design C Mn P S Si Cr Ni Mb Ti Nb N Cu Ce B Al
TP347 S34700 0.08 2 0.045 0.03 1 17.0–19 9.0–13 . . . . . . See Spec . .
TP347H S34709 0.04 – 0.1 2 0.045 0.03 1 17.0–19 9.0–13 . . . . . . See Spec . . . .

Heat Treatment Requirements-SA213 TP347H Stainless Steel

Grade UNS Heat Treat Type Austenitizing/ Solutioning Temperature, min or range °F [°C] Cooling Media ASTM Grain Size No. B
TP347 S34700 Solution treatment 1900 °F [1040 °C] water or another rapid cool . . .
TP347H S34709 Solution treatment cold worked:2000 water or another rapid cool 7
[1100] hot rolled: 1925 [1050]H

Tensile Requirements-SA213 TP347H Stainless Steel

Grade UNS Tensile Strength, Min ksi [MPa] Yield strength, min ksi [MPa] Elongation in 2 in. or 50 mm, min, %A, B Hardness, Max
Designation Brinell/Vickers Rockwell
TP347 S34700 75 [515] 30 [205] 35 192HBW/200Hv 90HB
TP347H S34709 75 [515] 30 [205] 35 192HBW/200Hv 90HB

PMI test for TP347H

Positive Material Identification (PMI) testing for TP347H involves the analysis of the chemical composition of the material to verify its alloy content and ensure it meets the required specifications.

TP347H is a high-temperature stainless steel alloy often used in applications like boiler tubes and heat exchangers. PMI testing is crucial to confirm that the material is indeed TP347H and that it meets the necessary alloy composition standards.

PMI test for TP347H
PMI test for TP347H
PMI test for TP347H
PMI test for TP347H
PMI test for TP347H
PMI test for TP347H

ASTM A213 SS 347H Equivalent

Grade UNS No Euronorm
347H S34709 1.4961
Specification Allowable Outside Diameter Variation in mm Allowable Wall Thickness Variation Exact Length Tolerance in mm Testing
Nominal Diameter Over Under %Over %Under Over Under
ASTM-A213 TP347H
Seamless Boiler
Superheater and 
Heat Exchanger Tubes
Under 25.4 .1016 .1016 +20 -0 3.175 0 Flattening Test
25.4-38.1 incl .1524 .1524 +22 -0 3.175 0 Tension Test
38.1-50.8 excl .2032 .2032 +22 -0 3.176 0 Flare Test
50.8-63.5 excl .254 .254 +2 -0 4.46 0 Hardness Test
63.5-76.2 excl .347H8 .347H8 +22 -0 4.76 0 100% Hydrostatic test
76.2-101.6 incl .381 .381 +22 -0 4.76 0 Refer to ASTM A-450

Flattening Test

Flattening tests shall be made on specimens from each end of one finished tube, not the one used for the flaring test, from each lot.

Flaring Test

Flaring tests shall be made on specimens from each end of one finished tube, not the one used for the flattening test, from each lot.

Hydrostatic and Nondestructive Testing

Each TP347H Stainless Steel Seamless pipe shall be subjected to the nondestructive electric test or the hydrostatic test. The type of test to be used shall be at the manufacturer’s option unless otherwise specified in the purchase order.

What is the difference between 347H and 316L?

347 and 316 stainless steel both fall into the 300-series family and are known for their stability. While 316 is a standard alloy that offers superior weldability, 347 offers superior corrosion resistance and mechanical strength.


Markings will adhere to prescribed specifications in A999/A999M. They shall include the NPS or OD and schedule number or average wall thickness, heat number, and NH (when hydro testing is not performed) and ET (when eddy-current testing is performed) or UT (when ultrasonic testing is performed). The marking shall also include the manufacturer’s private identifying mark, the marking requirement of section 12.3 on Hydrostatic or Nondestructive Electric Test, if applicable, and whether seamless (SML), welded (WLD), or heavily cold-worked (HCW). For Grades TP347 and TP347H Stainless Tubes, the marking shall also include the heat number and heat-treatment lot identification.


SA213 TP347/ TP347H Stainless tubes Applications Industry

ASTM A213 TP347H is a high-temperature resistant austenitic stainless steel that is commonly used in applications where high temperatures and corrosive environments are present. Some of the common applications of ASTM A213 TP347H include:

Related SA213 TP347H Stainless Steel

304/304L Stainless Steel

304 Stainless is a low carbon (0.08% max) version of basic 18-8 also known as 302.

316/316L Stainless Steel

Type 316 is more resistant to atmospheric and other mild environments than Type 304.

310S Stainless Steel

310S Stainless Steel has excellent resistance to oxidation under constant temperatures to 2000°F.

317L Stainless Steel

317L is a molybdenum bearing austenitic chromium nickel steel similar to type 316, except the alloy content in 317L is somewhat higher.

321/321H Stainless Steel

Alloy 321 (UNS S32100) is a titanium stabilized austenitic stainless steel with good general corrosion resistance.

Stainless Steel 410

Type 410 is a martensitic stainless steel which is magnetic, resists corrosion in mild environents and has fairly good ductility.

SA213 TP347H Stainless Steel

ASTM A213 ASME SA-213 TP347H Seamless Steel Tubes contains NB-Cr-Ni austenitic stainless steel.

Duplex 2205 (UNS S31803)

Duplex 2205 (UNS S31803), or Avesta Sheffield 2205 is a ferritic-austenitic stainless steel.

Duplex 2507 (UNS S32750)

Duplex 2507 (UNS S32750) is a super duplex stainless steel with 25% chromium, 4% molybdenum..

Super Duplex UNS S32760

Material to UNS S32760 is described as a super duplex stainless steel with a microstructure of 50:50 austenite and ferrite.

SA 269 Stainless Steel

ASTM A269 / A269M Standard Specification for Seamless and Welded Austenitic Stainless Steel Tubing for General Service

SA 249 Stainless Steel

ASME SA 249 Standard Specification for Welded Austenitic Steel Boiler, Superheater, Heat-Exchanger, and Condenser Tubes.

904L stainless steel

904L stainless steel consists of chromium, nickel, molybdenum and copper contents, these elements give type 904L...

06Cr19Ni10 stainless steel

06Cr19Ni10 stainless steel is a grade of stainless steel produced in accordance with the American ASTM standard.

【H】 Ceramic lined pipe

Ceramic lined pipe is made through self-propagating high-temperature synthesis (SHS) technique.

【H】 Cast basalt lined steel pipe

Cast basalt lined steel pipe is composed by lined with cast basalt pipe, outside steel pipe and cement mortar filling between the two layers.

【H】 Ceramic Tile Lined Pipes

Ceramic tile lined pipes have very uniform coating of specially formulated ceramic material that is affixed to the inner of the pipe.

【H】 Rare earth alloy wear-resistant pipe

The material of the rare earth alloy wear-resistant pipe is ZG40CrMnMoNiSiRe, which is also the grade of rare earth alloy steel.

【H】 Tubes Erosion Shields

Tubes Erosion Shields are used to protect boiler tubing from the highly erosive effects of high temperatures and pressures thereby greatly extending tube life.

【H】 ASTM A213 T91 Alloy Tube

The ASTM A213 T91 seamless tubes are primarily used for boiler, superheater, and heat-exchanger.

Ni-Hard Wearback Pipes Ni-Hard Wearback Pipes