Stainless Steel Round Tube 304 — Seamless

Seamless AISI 304 (1.4301) stainless steel round tube, ASTM A312 / EN 10216-5. SCH10 and SCH40 walls. Outer diameters from about 10.5 mm to 219.1 mm. Cut lengths typically 1–3 m. No weld seam — suited to pressure and process lines.

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Available Sizes & Finishes

27 sizes available

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Applications & Selection Guide

Seamless round tube in AISI 304 (1.4301) to ASTM A312 / EN 10216-5, in SCH10 and SCH40 walls. With no weld seam it is chosen for pressure and process lines.

It is used for process piping, instrument lines, heat exchangers and hydraulic and pneumatic lines. Outside diameters run from Ø10.5 mm to Ø219.1 mm, matching the pipe sizes of butt-weld fittings and flanges.

Cut lengths are typically 1–3 m. Send outside diameter, schedule or wall, length, quantity and destination in a quote request; we confirm stock, price and lead time.

Technical guides

304 vs 316 stainless steel: composition, strength, corrosion resistance and when to use each

How 304 (1.4301) and 316 (1.4401/1.4404) stainless steel differ in composition, PREN, strength and chloride resistance, what the L grades and A2/A4 fasteners mean, and which grade to choose.

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Stainless steel tube sizes and weights: round, square and rectangular tube in 304 and 316L

Size and weight tables for welded stainless steel round, square and rectangular tube in 304 and 316L: outside diameter, wall thickness and kg/m, the weight formulas, and how tube sizes relate to pipe and fittings.

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Metal weight calculator

Free metal weight calculator: kg/m and total weight of steel, stainless and aluminium tubes, bars, angles and sheet. Formulas and densities explained.

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