Innovative Stainless Steel Applications in transport ... - Euro Inox

3. Design using mill certificate data
Measured values of the 0.2 % proof stress are given on the mill or release certificate. A
value for the design strength can be derived from a statistical approach carried out in
accordance with the recommendations in Annex D of EN 1990. It is recommended that
the characteristic ultimate tensile strength (fu) should still be based on the specified
minimum value given in EN 10088-2.
A value of 200 000 N/mm 2 is given by EN 10088-1 for Young’s modulus for all the
standard austenitic and duplex grades typically used in structural applications. For
estimating deflections, the secant modulus is more appropriate. For these grades, a value
of 0.3 can be taken for Poisson’s ratio and 76 900 N/mm 2 for the shear modulus (G).
Table 9 shows the most common stainless steel grades and their most common or
typical areas of use. It should be noted that the given compositions are manufacturers’
typical values, whereas the mechanical properties are room-temperature minimum
requirements of EN 10088-2: 2005. The BUS and DOLTRAC project grades are
indicated in bold in the steel designation. The steel-type classification is based on the
crystal structure – ferritic, duplex (i.e. austenitic-ferritic) austenitic – or alloy.
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