Stainless steel I-beams, H-beams, channels and tees, either hot rolled in small sizes or — far more often today — made by laser-fusing or welding plates together. They are used where a structure must resist corrosion without coating: offshore platforms, water and wastewater plant, food and chemical plants, and exposed architectural frames.
Stainless structural sections are a small market compared with carbon steel beams, so few mills roll them hot, and only in the smaller sizes. Most stainless I-, H- and U-sections are now made by laser fusion: flanges and web are cut from hot-rolled plate or strip and joined by a laser beam along the full length, giving a sharp-cornered section with a narrow heat-affected zone and no filler metal. Larger or one-off sections are submerged-arc or MIG welded from plate.
Laser-fused sections usually copy the European IPE, HEA, HEB and UPN dimensions (EN 10365), so standard connection details and section tables can be used, but because there is no root radius their area and properties differ slightly from hot-rolled carbon steel sections of the same name. They can also be made to any depth, flange width and thickness the designer needs.
Stainless structures are designed to their own rules — EN 1993-1-4 in Europe and AISC 370 in the United States — because stainless steel has a rounded stress-strain curve with no sharp yield point and work-hardens strongly. 304L and 316L are the common grades; duplex 2205 and lean duplex offer roughly twice the yield strength, which allows lighter sections.
In the GCC stainless beams and channels are used in desalination and water plants, offshore and coastal installations, food processing and chemical plants. They are imported, mostly as laser-fused sections from Europe and Asia, and supplied through stainless stockists in the UAE and Saudi Arabia.
Sections are ordered by profile designation and size, grade, manufacturing route and length. Specify whether a hot-rolled or laser-fused section is acceptable, because their properties differ slightly.
| Region | Standard | What it covers |
|---|---|---|
| USA | ASTM A276/A276M ASTM |
Stainless steel bars and shapes — hot-rolled and cold-finished |
| USA | ASTM A1069/A1069M ASTM |
Laser-fused stainless steel bars, plates and shapes |
| USA | ASTM A484/A484M ASTM |
General requirements for stainless steel bars, billets, shapes and forgings |
| USA | AISC 370 AISC |
Specification for structural stainless steel buildings |
| Europe | EN 10088-3 CEN-CENELEC |
Stainless steels — bars, rods, wire and sections for general purposes |
| Europe | EN 10088-5 CEN-CENELEC |
Stainless steels — bars, rods, wire, sections and bright products for construction purposes |
| Europe | EN 1993-1-4 CEN-CENELEC |
Eurocode 3 — design of steel structures — supplementary rules for stainless steels |
| Europe | EN 10365 CEN-CENELEC |
Hot-rolled steel channels, I and H sections — dimensions and masses. A carbon steel standard; laser-fused stainless sections copy its sizes |
| Japan | JIS G4317 JSA |
Hot-formed stainless steel sections — H sections, angles and channels |
Grade equivalents and the standards bodies: Steel grades & standards
Stockist - Distributor · Fabrication · Contractors · Shanghai
Steel Mills - Agents & Traders · Stockist - Distributor · Other Steel Users · Sharjah
Steel Mills - Agents & Traders · Stockist - Distributor · Other Steel Users · Sharjah
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