BS 1449-2
Legacy British standard for stainless and heat-resisting steel plate, sheet and strip. Manufacturer BS/UK grade comparisons are provided for interpreting older material descriptions.
Stainless & Heat-Resisting Flat Products
BS 1449-2:1983
7 linked material grades
Material requirements.
Clearly organized.
Legacy British standard for stainless and heat-resisting steel plate, sheet and strip. Manufacturer BS/UK grade comparisons are provided for interpreting older material descriptions.
Historical flat-product requirements; check the original contract.
The BS/UK designations are manufacturer cross-references, not a declaration that the corresponding UNS grade satisfies every clause of BS 1449-2. For new stainless flat-product enquiries review the BS EN 10088-2 route.
Withdrawn — 15 July 1999
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Open a material page or switch between chemical composition and mechanical properties.
Chemical & Mechanical Properties
Select a table to compare the source-labelled material data.
| Grade / identification | C % | Cr % | Ni % | Mo % | Other |
|---|---|---|---|---|---|
| SS304 304S31 | 0.04 | 18.1 | 8.1 | — | — |
| SS304L 304S11 | 0.02 | 18.1 | 8.1 | — | — |
| SS316 316S31 | 0.04 | 17.2 | 10.1 | 2.1 | — |
| SS316L 316S11 | 0.02 | 17.2 | 10.1 | 2.1 | — |
| SS321 321S31 | 0.04 | 17.3 | 9.1 | — | Ti stabilized |
| SS347 347S31 | 0.05 | 17.5 | 9.5 | — | Nb stabilized |
| SS904L 904S13 | 0.01 | 20 | 25 | 4.3 | Cu 1.5 |
Manufacturer typical composition, mass %; selected elements only.
These published alloy values are comparison data. The BS 1449-2 acceptance limits must be checked in the specified revision.
| Grade / identification | Product form / condition | Tensile (MPa) | 0.2% proof / yield (MPa) | Elongation (%) | Data basis |
|---|---|---|---|---|---|
| SS304 304S31 | Hot-rolled plate, usually 10–20 mm, transverse; room temperature | 600 | 270 | 55 | Manufacturer typical values; elongation A5. |
| SS304L 304S11 | Hot-rolled plate, usually 10–20 mm, transverse; room temperature | 580 | 260 | 55 | Manufacturer typical values; elongation A5. |
| SS316 316S31 | Hot-rolled plate, usually 10–20 mm, transverse; room temperature | 570 | 260 | 55 | Manufacturer typical values; elongation A5. |
| SS316L 316S11 | Hot-rolled plate, usually 10–20 mm, transverse; room temperature | 570 | 260 | 55 | Manufacturer typical values; elongation A5. |
| SS321 321S31 | Hot-rolled plate, usually 10–20 mm, transverse; room temperature | 570 | 250 | 55 | Manufacturer typical values; elongation A5. |
| SS347 347S31 | Hot-rolled plate, usually 10–20 mm, transverse; room temperature | 595 | 260 | 45 | Manufacturer typical values; elongation A5. |
| SS904L 904S13 | Hot-rolled plate, usually 10–20 mm, transverse; room temperature | 600 | 260 | 50 | Manufacturer typical values; elongation A5. |
Typical properties are comparison values. Manufacturer limits marked “min” apply only to the stated product. Confirm the ordered revision, thickness, heat treatment, specimen direction and gauge length before material acceptance.
Engineered for demanding service.
Grade selection depends on the process environment, temperature, corrosion exposure and equipment design.
From material specification to gasket construction
Select the required product form, grade, delivery condition and certification for the approved gasket construction. Finished gasket dimensions and performance requirements are established separately.
Explore gasket products ↗Common questions
Short answers for engineers and purchasing teams.
How should BS 1449-2 be specified?
State the revision, exact material grade, product form, dimensions, delivery condition and certification requirements on the purchase order.
Are the displayed properties specification acceptance limits?
The tables identify published manufacturer reference data. Typical values describe the stated reference product and are not certified BS 1449-2 limits. Use the ordered revision for material acceptance.
Are these all the materials covered by the standard?
This page links selected materials already present on the website. The linked material list is not the complete scope of the standard.
Which sources support this material reference?
BSI — BS 1449-2:1983 publisher record and withdrawal status
Outokumpu — Steel Grades, Properties and Global Standards, Tables 4, 5 and 7