D5.B.6.1 Clause 3.2.1(1) - Material Properties
The material strengths (i.e., steel grade strengths) to be used with NF EN 1993-1-1 are given in Table 3.1 of the code. The French National Annex however, specifies a separate table (Table 3.1 NF) for the yield and tensile strengths of steel grades. This new table replaces Table 3.1 in NF EN 1993-1-1:2005. Table 3.1 NF excludes steel grades from standards EN 10210-1 and EN 10219-1 that are given in EC-3.
STAAD.Pro uses the steel grades and values from the table given in the National Annex (i.e., - Table 3.1 NF). Table 3.1 NF is similar to table 3.1 in EC3, apart from the fu values for S 355 and S355 W grade steel.
Standard and grade of steel | Nominal thickness, t, of the element (mm) | ||||
---|---|---|---|---|---|
t 40 mm | 40 mm < t ≤ 80 mm | ||||
fy (N/mm2) | fu (N/mm2) | fy (N/mm2) | fu (N/mm2) | ||
EN 10025-2 | S 235 | 235 | 360 | 215 | 360 |
S 275 | 275 | 430 | 255 | 410 | |
S 355 | 355 | 490 | 335 | 470 | |
S 450 | 440 | 550 | 410 | 550 | |
EN 10025-3 | S 275 N/NL | 275 | 390 | 255 | 370 |
S 355 N/NL | 355 | 490 | 335 | 470 | |
S 420 N/NL | 420 | 520 | 390 | 520 | |
S 460 N/NL | 460 | 540 | 430 | 540 | |
EN 10025-4 | S 275 M/ML | 275 | 370 | 255 | 360 |
S 355 M/ML | 355 | 470 | 335 | 450 | |
S 420 M/ML | 420 | 520 | 390 | 500 | |
S 460 M/ML | 460 | 540 | 430 | 530 | |
EN 10025-5 | S 235 W | 235 | 360 | 215 | 340 |
S 355 W | 355 | 490 | 335 | 490 | |
EN 10025-6 | S 460 Q/QL/QL 1 | 460 | 570 | 440 | 550 |
If you specify a steel grade that is not given in the Annex Table 3.1 (NF) but is present in Table 3.1 of EN 1993-1-1:2005, the program uses the values from Table 3.1 of EN 1993-1-1:2005. The appropriate yield strength (fy) used is shown in the design output file.