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Stainless Steel Section for Structural Application






Unlike carbon steel, there have not been listings of open section sizes for stainless steel structural sections, until Sections Directory in May 2004. This gives the full range of 'standard' stainless steel sections that are readily available and the companies who supply them. The directory distinguishes between producers and distributors as well as showing the main stainless steel grades available from each supplier across the complete size range.

Section Properties
The Sections Directory cross-references the specific products and properties included in the design tables section of the Steel Construction Institute (SCI) publication, Structural Design of Stainless Steel. This also provides a comprehensive source of practical design guidance and has recently been revised to incorporate current advances in the understanding of the structural behaviour of stainless steel. With sponsorship, SCI has also developed interactive software to assist architects and designers in the calculation of section properties and member capacities according to UK design codes. This is now available free-of-charge on the SCI's linked site Select the 'UK Codes' option on the site's home page

Hollow Sections
The hollow sections listed in the directory are available in grades 1.4301 (304), 1.4307 (304L), 1.4401 (316), 1.4404 (316L) and 1.4571 (316Ti). Normally hollow sections are welded from strip or plate. Seamless sections are also available, but with a more restricted range of sizes. There is no strength advantage from using seamless tubes compared to welded sections of the same sizes. Provided full penetration seam welds are used in the manufacture of welded sections their strengths are comparable with seamless sections. On certain finishes however the weld seam may be visible, which may be unacceptable for aesthetic reason.

The design strength of 'as-formed' austenitic stainless steel tube is generally higher than for the same grade of annealed tubes. For most structural applications either annealed or 'as-formed' supply conditions can be expected to provide comparable corrosion resistance.

Section Tables Available

The directory can be downloaded from Structural Sections. Section tables available

Manufacturing Method Section Type
Hot Rolled (Part 1.1) Channels
. Equal Sided Angles
. Unequal Sided Angles
. Unequal T-Profiles
Hot Extruded & Special Sections (Part 1.2) Z Profiles
. I Beams
. Channel (parallel)
. Channel (taper)
. Equal Sided Angles
. Unequal Sided Angles
. Equal T Profiles
. Unequal T profiles
Cold Formed Sections (Part 2) .
Rolled Equal Sided Angles
. Unequal Sided Angles
. Channel s
Formed Z Profile
. Special Sections (doors and windows)
Drawn Equal Sided Angles
. Unequal Sided Angles
. T Profiles
Welded Sections (Part 3) I Profiles
. H Profiles
. Channels
. Equal Sided Angles
. Unequal Sided Angles
. Equal Sided T Profiles
. Unequal Sided T Profiles
Circular Hollow Sections (Part 4.1) .
Square Hollow Sections (Part 4.2) .
Rectangular Hollow Sections (Part 4.3) .

Approximate Range of Available Dimensions

Circular Hollow Sections 1.0-30mm thick 6.0-914mm diameter Square Hollow Sections 1.0-25mm thick 10 x 10-800 x 800 width Rectangular Hollow Sections 1.0-25mm thick 20 x 10-900 x 600mm width.

Approximate range of available dimensions:

Circular hollow sections: thickness: 0.25 to 8.0 mm, diameter: 3 to 250 mm
Rectangular hollow sections: thickness: 1.0 to 8.0 mm, width: 20x10 to 300x150 mm
Square hollow sections: thickness: 1.0 to 8.0 mm, width: 10x10 to 300x300 mm
Oval hollow sections: thickness: 1.0 to 3.0 mm, diameter: 61x37 to 121x76 mm

Open sections

Open sections, including many masonry support section types, can be press formed from flat sheet or plate. These are available as standard products or to special design and include formed and welded sections, such as I sections made up of two channels welded, back to back. Thicker sections are manufactured from welded flat plate, but may be subject to final straightness limitations. Heavier sections sizes may be hot formed, either by extrusion or rolling. Open sections can usually be sourced in grades 1.4301 (304) and 1.4401 (316). Some less common and more 'specialised' grades, including 1.4713 (a 6-8% chromium heat resisting ferritic steel) are also available. For information on how to select the most suitable grade for internal or external building applications, see articles Selection of stainless steels for building internal applications and Selection of stainless steels for building external applications

Solid sections bars

Round, square, rectangular and hexagonal solid bars are generally widely available in grades 304 (1.4301) and 316 (1.4401) and additionally in other more specialised grades, including duplex 2205 (1.4462).

Approximate range of available dimensions:

Circular: diameter: 2 to 450 mm
Flats: thickness: 3.0 to 25 mm, width: 12x150 mm
Square: width: 3 to 300 mm
Hexagonal: across flats: 5 to 100 mm

Fixings and fasteners

Fasteners to BS EN ISO 3506 property class 70 are most widely available from stockholders, Stainless steel bolts, washers, nuts, studs, rivets and self-tapping screws are widely available.

Specially designed fasteners can also be supplied in a range of grades. Special grades for specific applications such as swimming pool buildings are also available from specialist suppliers.

On-line supply sources for stainless steel sections

In addition to the Sections Directory, the Buyers Guide area of the web site can be used for sourcing stainless products, including a range sections, using the home page 'Buyer's Guide' selection.

The range of section choices in this guide are shown in the table below;

    Buyers Guide
Hollow sections (tubes) Circular hollow sections (CHS) Tubes-welded-Tubes and components
  Oval hollow sections  
  Rectangular hollow sections (RHS) Sections-rectangular hollow-Long Products 
Tubes- rectangular- Tubes and components
  Square hollow sections (SHS) Tubes-square- Tubes and components
Open sections Equal and unequal angles Angles- Long Products
  Channels Channels-Long Products
  'T' sections Sections-T Shaped-Long Products
  'I' sections (universal columns/beams) Sections-Long Products 
Profiles-hot rolled-Intermediate Steel Products 
Profiles-hot extruded-Intermediate Steel Products 
Sections-cold formed- Long Products
Profiled flat sections Roll formed sections and sheet panels Profiles-cold rolled- Intermediate Steel Products 
Sections-special,cold rolled- Long Products
Cold drawn sections Drawn narrow sections Sections-special,cold drawn- Long Products
Solid sections (bars) Circular (round) Bars-round- Long Products
  Rectangular (flat) Bars-flat,hot rolled- Long Products
  Square Bars-square- Long Products
  Hexagonal Bars-hexagon- Long Products

   Stainless Steel Tubing, Nickel Alloy Tubing, Brass Alloy Tubing, Copper Nickel Pipe Material Grades


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Structural Steel Comparison Table
ASTM Standards for Structural Tubing Mechanical Tubing Welded Fitting


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Main Products:

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Nickel Alloy U bend Tubes
Copper Alloy U Bend Tubes
Heat Exchanger Tube
Super Duplex Pipe
Nickel Alloy Tube
Brass Alloy Tubing
Copper Nickel Alloys Tubes
Stainless Steel Hollow Tube
Stainless Steel Oval Tubing
Stainless Steel Square Tubing
Stainless Steel Rectangular Tubing
Stainless Steel Capillary Tube
Duplex Stainless Steel Pipe
Seamless Stainless Steel Tubing
Corrugated Stainless Steel Tubing
Stainless Steel Twisted Tube
Polishing Stainless Steel Tubing
Stainless Steel Aircraft Tube
Stainless Steel Hydraulic Tubing
Stainless Steel Instrumentation Tubing
Stainless Steel Angle Iron Bar
Stainless Steel Mechanical Tube
Bright Annealing Stainless Tube
Heat resistant Stainless Steel
Stainless Steel Welded Pipe
Extruded Serrated Finned Tubes Integral Finned Tubes / Extruded Aluminum Finned Tubes
Brass Alloys Copper Nickel Alloy Integral Low Finned Tubes
HFW High Frequency Welded Helical Spiral Serrated Finned Tubes
Corrosion Resistant Stainless Steel
Corrosion Resistance Stainless Steel

Stainless Steel Tubing Pipe

304 Stainless Steel Pipe
304L Stainless Steel Pipe
304H Stainless Steel Pipe
304/304L Stainless Steel Tubing
309S Stainless Steel Pipe
310S Stainless Steel Pipe
316L Stainless Steel Tubing
316Ti Stainless Steel Tube
317L Stainless Steel Pipe
321 321H Stainless Steel
347 347H Stainless Steel
904L N08094 Seamless Tubes
17-4 PH 630 UNS S17400 Stainless Steel
253MA S30815 Stainless Steel Tube
S31254 254 SMO Pipe
S31803 Stainless Steel
2205 Duplex Pipe Tubing
S32101 Stainless Steel
S32304 Stainless Steel
2507 Super Duplex Pipe
S32750 Super Duplex Pipe
S32760 Super Duplex Steel
1.4462 Stainless Steel Pipe
ASTM A213 | ASTM A269
ASTM A312 | ASTM A511
ASTM A789 | ASTM A790
ASTM B161 / ASME SB 161 | ASTM B111
EN 10216-5
ASTM A789 ASME SA 789 S31803 S32205 S32101 S32750 S32760 S32304 S31500 S31260 Seamless Tubes
EN 10216-5 1.4462 1.4362 1.4162 1.4410 1.4501 Seamless Tubes
Nickel Alloy Tubing:

UNS N08020 Alloy 20 Tubing
UNS N02200 Alloy 200 Tube
UNS N02201 Alloy 201 Pipe
UNS N04400 Monel 400 Tubing
N06600 Inconel 600 Tube
N06601 Inconel 601 Tubing
N06625 Inconel 625 Tubes
N08800 Incoloy 800 Tube
N08810 Incoloy 800H Tube
N08811 Incoloy 800HT Tubing
UNS N08825 Incoloy 825 Pipe
ASTM B622 N10276 C276 Tubing
ASTM B622 N06022 Hastelloy C-22 Alloy Tubes
C28000 Brass Seamless Tubes C44300 Brass Seamless Tubes
C68700 Brass Seamless Tubes
C70600 Copper Nickel Tubes
C71500 Copper Nickel Tubes
DIN 2391 Seamless Precision Steel Tubes
EN 10305-1 E215 E235 E355 Seamless Precision Steel Tube Tubing Tubes
DIN 2393 St28 St34.2 St37.2 St44.2 St52.3 Welded Precision Steel Tubes
EN 10305-2 E195 E235 E355 Welded Cold Drawn Precision Steel Tube