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Seamless Tube



Product Description

Penn Stainless Products supplies seamless tube per ASTM A 213, ASTM A 269 and ASTM A 511. We supply common grades of stainless such as 304/304L and 316/316L in standard tube sizes and wall thicknesses. We can also supply more challenging stainless and nickel seamless tubing in 304H, 309/S, 310/S, 317/L, 321H, 347H, Alloy 20, Duplex 2205, Duplex 2507, Alloy 200/201, C276, Alloy 400, Alloy 600, Alloy 625, Alloy 800H, Alloy 800HT, 254SMO, AL6XN and others. We also supply seamless stainless hollow bar for machining applications with wall thicknesses in excess of 2” for some stainless grades. Most sizes of seamless stainless and nickel tube can be cut to exact sizes. Non standard sizes can be made to order. Contact a sales associate today for your exact seamless nickel or stainless tubing requirement.




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Availability Overview


gauge 1/16" thru 14" / Light & Heavy Wall Thickness Available
Stainless grades 304 – 304/L – 304H – 304 1/8 hard - 309/S – 310/S – 316 – 316L – 316H – 317L – 321 – 321H – 347 – 347H – 254SMO – Duplex 2205 – 904L - 410 – 17-4PH – 17-7PH and more
Alloy Grades Alloy 20 - 200 – 400 – 600 – 601 – 625 – 825H 825HT - C276

Value Added Services


  • Let Penn Stainless cut your next seamless tubing requirement to your exact dimension.
  • Non-standard OD’s and Wall thicknesses in instrumentation tube sizes ranging from 1/8” thru 1-1/2” can be made to order and shipped in about 2 weeks. Millimeter sizes can also be supplied. Special lengths in excess of 30’ can be supplied.
  • Heavy wall hallow bar in stock thru 16” diameter up to 2” wall.
    • We can supply the most challenging, non standard tubing requirements.
  • Take advantage of our Domestic and International seamless stainless pipe mills to supply non standard wall thicknesses, lengths or chemistry.
  • Common stocked specifications include
    • ASTM A 213
    • ASTM A 269
    • ASTM A 511
    • Some Mill T Specifications are stocked
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