Indication, quality acc. to EN 10027
S 355 J 2 G3
| Basic
symbol: S = construction steel |
355
= minimum yieldpoint in N/mm² |
Impact
value: (average value) J = minimum 27 J K = minimum 40 J L = minimum 60 J |
Remaining
characteristics: G, followed by a number H, for tube profiles |
Testing
temperature: R = roomtemp. (± 20°C) 0 = 0°C (=273K) 2 = -20°C 4 = -40°C |
| Basic symbol | Derived from | Application |
|---|---|---|
| S | structural | construction steel |
| GS | structural | cast construction steel |
| P | pressure | pressure purposes |
| L | line pipe | piping |
| E | engineering | construction steel for machine construction |
| B | - | concrete steel |
| Y | yield | - |
| R | rails | steel for or in the shape of rails |
| H | high yield | cold formed flat products with a high yieldpoint. |
After the indication S a number follows that indicates the minimum yieldpoint in N/mm² for the smallest thickness area. After that acc. to EN 10025 a code follows for the minimum average impact value.
The first position indicates the required impact value. The second position indicates the required temperature of the impact test.
Finally it is possible that the letter G follows in combination with a number. This indicates other characteristics of the steel.
G1 and G2 are exclusively being used for S235. G1 means: not killed steel (FU) and G2: not killed steel not allowed (FN). G3 and G4 have a double meaning. Both refer to the disoxidation method FF, which means: fully killed steel with nitrogen binding elements.
For flat and long products +N means that the material will be supplied in normalised condition.
For long products +N means that there is a possibility to specify the delivery
condition N (normalised). The last mentioned has to be specified by the client.
When one does not specify, the choice is up to the producer.
If one mention G4 in the indication, the delivery condition is always the choice
of the producer. This is for flat and long products.