304l dual certified stainless steel pipe

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Dual Certification - Rolled Alloys, Inc.

304/304L is an austenitic stainless steel; low carbon for as-welded corrosion resistance. 316 / 316L ... The most common example of this type of "dual" certification is that of 304 and 304L (or 316 and 316L). ... but since it also has the intentional addition of another element (titanium), it cannot be certified as 304. Alloy. Carbon (Wt ...

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dual rated 304/304L - Steel and Stainless engineering ...

2007-6-12 · Dual certified materials are not some mystical version of materials. It just happens to meet the requirements of two grades that have significant overlap in the ranges specified for each grade. 304 and 304L are just one of many examples. It is entirely acceptable to buy dual certified to 304 and 304L and use it exclusively as either grade.

Please do not cross post. thread378-180913Dual certified materials are not some mystical version of materials. It just happens to meet the requirements of two grades that have significant overlap in the ranges specified for each grade. 304 and 304L are just one of many examples. It is entirely acceptable to buy dual certified to 304 and 304L and use it exclusively as either grade. The Codes only require that you follow a consistent set of rules. For example, you treat it as 304 or you treat it as 304L. You may not mix and match the properties in the design, fabrication or rerection of the unit. To answer your question about what are the properties of a dual certified material... they are as reported on the mill test report. And by coincidence, they meet the range limits stated for two grades of material. Joe TankAlmost all "304" plate is dual certified. It may be 0.03 max carbon stuff dual certified 304L/304. This, meanins it has decent corrosion resistance as-welded and the tensile & yield properties of 304, at least near room temperature. 1150F is in the creep range, for which you need dual certified 304/304H. This has a minimum of 0.04% carbon for strength, plus I think both grain size and minimum annealing temperatures. It is widely available. Dual certification is the common practice. The mill does not want to melt two or three different chemistries, i.e. 304L, 304 and 304H so they make two different chemistries do the work of these three. It is the magic of precise chemistry control by refining the melt in an Argon-Oxygen Decarburization vessel, where a little nitrogen brings up the yield strength of 304L to the requirements of 304. Great for room temperature but the dual-certified "L" grade is not usually considered strong enough for use in the creep-limited range. Clear as mud?For simplicity, I've limited my understanding of dual certification to this practical summary It's 304L material with controlled amounts of Nitrogen to bump up the yield to match 304ss. It's not a material for high temperature / creep range service. Not sure that answers the question! :) Just a note of warning - we had a minor incident where we ordered ASTM spec'd 304ss SW fittings, and gave the supplier the ok to supply dual certified to make up the numbers. The storeman picking the materials however, threw in some 304L non dual certified into the mix - to make up the numbers. We ended up accepting the material but slightly derating the DP of the line to suit.Material manufacturers indeed often work with dual certified stainless steels 304L/304 (also 316L/), which is allowed. This means - a maximum carbon content of 0.03% --> limited by 304L, interesting for welding - Tensile/yield test results --> limited by 304, interesting for calculations (thinner thk's --> material saving) BUT - Indeed, lower carbon also leads to poor creep properties, (for 304L I would stay below 425°C). - Could the lower carbon also have an influence on the chemical resistance for certain fluids (I don't know, some one else)???304 versus 316 - Cryogenic engineering2008-10-6Welding 304 to 304L - Metal and Metallurgy engineering 查看更多结果

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304 / 304L - Rolled Alloys, Inc.

304/304L is an austenitic stainless steel; low carbon for as-welded corrosion resistance. ... it is common for 304L to meet the mechanical properties of 304 straight grade. As a result, most products are dual certified as 304 and 304/304L. Also available in PRODEC® enhanced machining grade. ... 304 / 304L Flanges, 304 / 304L Hex Bar, 304 ...

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Stainless Steel 304/304L Suppliers, Dealers, …

2018-12-14 · Stainless Steel 304/304L METLINE 2017-08-17T09:11:41+00:00 Alloy 304/304L (UNS S30400/S30403) is the most widely utilized “18-8” chromium-nickel austenitic stainless steel. It is an economical and versatile corrosion resistant alloy suitable for a …

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304/304L Stainless Steel Tubing 304/304L Stainless …

2018-12-11 · The dual certified 304/304L meets specifications for both 304 and 304L stainless steel, and may be interchanged and used safely for either grades application. 304/304L stainless steel is available in rounds, squares, rectangles, structural angle shapes, round and rectangular welded tube, and schedule pipe. 304 sheet and plate can be cut into ...

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Most Widely Used Austenitic Stainless Steel, a Versatile ...

2017-3-6 · stainless steel. It is an economical and versatile corrosion resistant alloy suitable for a wide range of general purpose applications. It is common practice for 304L to be dual certified as 304 and 304L. The low carbon chemistry of 304L combined with an addition of nitrogen enables 304L to meet the mechanical properties of 304. Alloy 304/304L ...

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WELDED AND SEAMLESS PIPE - Antec Engineering

2013-11-13 · WELDED AND SEAMLESS PIPEWELDED AND SEAMLESS PIPE ... ASTM A312 (latest edition), Seamless and Welded Austenitic Stainless Steel Pipe. Applicable stock grades are TP304/304L and TP316/316L. Pipe is generally dual certified within each grade. The mechanical and chemical properties applicable

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Schedule 10 Tee Butt Weld Pipe Fittings, Stainless Steel

2019-3-17 · Schedule 10 Tee Butt Weld Pipe Fittings are available in A312 compliant dual certified 304/304L or 316/316L Stainless Steel with a mill finished inner and outer diameter (ID/OD).

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Dual (multiple) certification of stainless steel products

Dual (multiple) certification of stainless steel products Introduction. Although dual or multiple certification can mean the issue of two separate EN 10204 certificate types for the same inspected / tested or delivered batch of steel, the term normally infers the mention of more than one standard or grade (or both) on the same test certificate.

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304 Stainless Steel Pipe Midwest Steel & Aluminum

304 Stainless Steel Pipe. The most widely used of the stainless and heat resisting steels, 304 offers good corrosion resistance to many chemical corrodents as well as industrial atmospheres. 304 Stainless Pipe. 304 Stainless Steel Pipe has very good formability and can be readily welded by all common methods. 304/304L dual certified.

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