--- title: TP347 / 347H Stainless Steel Tube, SA213 | Ameritube description: TP347 and 347H columbium-stabilized seamless stainless steel tube to ASME SA213 from Ameritube, Hillsboro, Texas. Superheater and high-temperature refinery service. Request a quote. --- 100% Made in USA · Hillsboro, TexasISO 9001:2015 certified · [(254) 580-9888](tel:+12545809888) [![](https://ameritube.net/hs-fs/hubfs/raw_assets/public/ameritube-2026/images/logo.jpg?width=52&height=52&name=logo.jpg)AmeritubeCopper tube mill](https://ameritube.net/?hsLang=en) [Products](https://ameritube.net/products?hsLang=en)[Capabilities](https://ameritube.net/capabilities?hsLang=en)[Industries](https://ameritube.net/markets?hsLang=en)[Quality](https://ameritube.net/quality?hsLang=en)[Resources](https://ameritube.net/resources?hsLang=en)[Company](https://ameritube.net/company?hsLang=en) [Talk to the quote desk(254) 580-9888](tel:+12545809888)[Request a quote](https://ameritube.net/request-a-quote?hsLang=en) [tel:+12545809888](tel:+12545809888) Menu - [Products](https://ameritube.net/products?hsLang=en) - [Capabilities](https://ameritube.net/capabilities?hsLang=en) - [Industries](https://ameritube.net/markets?hsLang=en) - [Quality](https://ameritube.net/quality?hsLang=en) - [Resources](https://ameritube.net/resources?hsLang=en) - [Company](https://ameritube.net/company?hsLang=en) - [Call the mill](tel:+12545809888)[Request a quote](https://ameritube.net/request-a-quote?hsLang=en) ![](https://ameritube.net/hs-fs/hubfs/new-site/cast/tube-stand-worker.jpg?length=960&name=tube-stand-worker.jpg) Products / Stainless & Duplex # TP347 / 347H stainless, columbium-stabilized for creep and welding. Columbium (niobium) stabilization gives 347 the same intergranular protection as 321 with better weldability and higher creep strength. The H grade is the austenitic superheater tube of choice in high-pressure boilers and refinery heaters. [Quote TP347 / 347H](https://ameritube.net/products/sa-213-tp347#quote) [Or call the quote desk(254) 580-9888](tel:+12545809888) TP347 / 347H at a glance SourcedSupplied from qualified mills. Inspected, tested, and certified by Ameritube in Hillsboro, Texas 100%Eddy current tested before shipment SA213Supplied to ASME SA213, ASTM A213 MTRFull mill test report with every order **Alloy**TP347 / 347H Stainless Steel **Family**Stainless & Duplex **Supplied to**ASME SA213, ASTM A213 **Typical service**High-temperature service, Superheaters **Size range**1/2" to 4" OD, .049" to .250" wall **Tempers**Solution annealed; 347H with grain size and heat treatment per SA213 **Testing**100% eddy current or ultrasonic per SA213, hydrostatic, flattening, flaring; grain size, intergranular corrosion, and PMI on request **Origin**Domestic and approved import mills, inspected and certified in Hillsboro **Sourced alloy, certified in Hillsboro**Ameritube does not manufacture TP347 / 347H in Texas. It is supplied from qualified domestic and international mills, then received, inspected, tested, and released under our ISO 9001:2015 system in Hillsboro, Texas, with a full mill test report. ## What TP347 / 347H is Type 347 is 18Cr-10Ni stainless stabilized with columbium and tantalum at roughly ten times the carbon content. Like 321, it resists sensitization in the 800 to 1500 degree F range, but columbium carbides are more stable than titanium carbides, which improves weld-zone corrosion resistance and elevated-temperature strength. TP347H, with controlled carbon and grain size, is the standard austenitic grade for final superheater and reheater tube. ## Chemical composition | Element | Requirement | | --- | --- | | Carbon | 0.08% max (347); 0.04 to 0.10% (347H) | | Chromium | 17.0 to 19.0% | | Nickel | 9.0 to 13.0% | | Columbium + Tantalum | 10 x C min to 1.10% max (347); 8 x C min (347H) | | Manganese | 2.00% max | ## Mechanical properties | Property | Minimum | | --- | --- | | Tensile strength | 75,000 psi (515 MPa) | | Yield strength | 30,000 psi (205 MPa) | | Elongation in 2" | 35% | ## Where it is used - Final superheater and reheater tube in utility boilers. - Refinery heater radiant and convection tubes, FCC and coker units. - High-temperature hydrogen and hydrocarbon service. - Chemical plant furnace tubes and heat exchangers above 1000 degrees F. ## Ordering note 347H for pressure parts under ASME Section I requires specific heat treatment and grain size. Send the design code and temperature and we will make sure the certification covers it. **What to put in your TP347 / 347H RFQ** 347 or 347H, OD, minimum wall, length, quantity, design temperature, grain size, and the ASME Section or licensor specification. Mention any stabilizing anneal or shot-peening requirement. ### Documents - [Ameritube main brochure](https://ameritube.net/hubfs/PDFs/main_brochure.pdf?hsLang=en)PDF - [ISO 9001:2015 certificate](https://ameritube.net/hubfs/PDFs/ISO_CERT.pdf?hsLang=en)PDF ### Related alloys [C44300](https://ameritube.net/products/c44300-admiralty-brass?hsLang=en)[C70600](https://ameritube.net/products/c70600-copper-nickel-90-10?hsLang=en)[C71500](https://ameritube.net/products/c71500-copper-nickel-70-30?hsLang=en)[C72200](https://ameritube.net/products/c72200-copper-nickel-chromium?hsLang=en)[SA179](https://ameritube.net/products/sa-179?hsLang=en)[SA213 T2](https://ameritube.net/products/sa213-t2?hsLang=en) ### Industries [Oil & Gas](https://ameritube.net/markets/oil-gas?hsLang=en)[Power Generation](https://ameritube.net/markets/power?hsLang=en) Alloy: TP347 / 347H Stainless Steel × Copper & Brass (Made in USA) **C12200**DHP Copper **C44300**Admiralty Brass **C70600**Copper Nickel 90/10 **C71500**Copper Nickel 70/30 **C72200**Copper Nickel Chromium Carbon & Alloy Steel **SA179**Seamless Carbon Steel **SA213 T2**Alloy Steel Boiler Tube **SA213 T5**Alloy Steel Boiler Tube **SA213 T9**Alloy Steel Boiler Tube **SA213 T11**Alloy Steel Boiler Tube **SA213 T12**Alloy Steel Boiler Tube **SA213 T22**Alloy Steel Boiler Tube Stainless & Duplex **TP304 / 304L**Stainless Steel **TP316 / 316L**Stainless Steel **TP321 / 321H**Stainless Steel **TP347 / 347H**Stainless Steel **SA268**Ferritic Stainless **SA249**Welded Stainless **SA789 S32205 / S31803**Duplex Stainless Nickel Alloys **Alloy 200**Nickel 200 (N02200) **Alloy 276**C-276 (N10276) **Monel 400**Nickel Copper (N04400) **Monel 405**Free-Machining Nickel Copper (N04405) **Alloy 600**Inconel 600 (N06600) **Alloy 625**Inconel 625 (N06625) **Alloy 800**Incoloy 800 (N08800) **Alloy 825**Incoloy 825 (N08825) Not sure? **Ask us**Describe the service and we will recommend the alloy No match. Pick "Ask us". **ISO 9001:2015**Bureau Veritas certified **Since 2004**Hillsboro, Texas ### Have a spec? Send it. Alloy, OD, wall, length, quantity. An engineer on the Hillsboro quote desk answers within one business day. 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