S355N Steel Grade, Mechanical Properties, Chemical Composition, Grade Equivalent

Standard: EN 10025-3 :2004 European standard for hot-rolled structural steel. Part 3 - Normalised/normalised rolled weldable fine grain structural steels.

Steel grade: S355N ;

Number: 1.0545 .

These steels are used for welded parts that have to withstand high levels of strain. Typical applications are bridges, pylons and other architectural structures.

The table below show the mechanical properties of grade S355N

 
Minimum yield strength Reh
MPa
Tensile strength Rm
MPa
Minimum elongation - A
Lo = 5,65 * √ So (%)
Steel grade
Nominal thickness
mm
Nominal thickness
mm
Nominal thickness
mm
 
≤16
>16
≤40
>40
≤63
>63
≤80
>80
≤100
>100
≤150
>150
≤200
>200
≤250
≤100
>100
≤200
 >200
≤250
≤16
>16
≤40
>40
≤63
>63
≤80
 >80
≤200		 >200
≤250
S355N
355
345
335
325
315
295
285
275
470-630
450-600
 450-600
22
22
22
21
21
21


Notch impact test

Temperature
°C
-10
0
20
Min. absorbed energy
J
43
47
55

The table below show the chemical composition of grade S355N

 
Ladle analysis.
S - sulphur content of 0,010 % max. can be agreed in the order for all products with a thickness of ≤ 16 mm intended for railway construction.
The minimum value for the Al total content shall not apply if the steel contains sufficient quantities of nitrogen-fixing elements.
CEV maximum carbon equivalent value CEV = C + Mn / 6 + (Cr + Mo + V) / 5 + (Cu + Ni) / 15
Steel grade
C
max.
%
Si
max.
%
Mn
%
P
max.
%
S
max.
%
N
max.
%
Al
total
%
Cu
max.
%
Cr
max.
%
Ni
max.
%
Mo
max.
%
Nb
max.
%
V
max.
%
Ti
max.
%
CEV
max. %
Thickness (mm)
5 - 80
5 - 63
63 - 80
S355N
0,20
0,50
0,90 - 1,65
0,030
0,025
0,015
0,020
0,55
0,30
0,50
0,10
0,050
0,12
0,05
0,43
0,45

S355N Steel Grade Equivalent Table

Germany
DIN, WNr
DIN 17102:1983
France
AFNOR
NFA 36 201:1992
England
BS
BS 4360:1990
China
GB
Sweden
SS
Russia
GOST
Italy
UNI
StE355
E355R
50DD
Q345D
2134-01
15GF
FeE355KGN

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