Designation system for steels. Steel names and principal symbols according to EN 10027
For example: S 355 J2 G3
| Symbol |
Derived frm |
Application |
| S |
Structural |
Construction steel, including fine-grained steel grades |
| P |
Pressure |
Pressure vessel |
| E |
Engineering |
Construction steel for machine construction |
| L |
Line pipe |
Pipe-lines (pipes) |
The three-figure combination stands for a minimum yieldpoint in N/mm.
Impact Value
| J |
27 Joule |
| K |
40 Joule |
| L |
60 Joule |
Characteristics for construction steel
| W |
Weather resistant |
| G1 |
Not killed steel (FU grade) |
| G2 |
Not killed steel not allowed (FN grade) |
| G3 |
Normalised or normalised rolled |
| G4 |
The choice for normalising is up to the producer (usually not normalised) |
Testing temperature
| R |
20oC |
| 0 |
0oC |
| 2 |
-20oC |
| 3 |
-30oC |
| 4 |
-40oC |
| 5 |
-50oC |
| 6 |
-60oC |
Characteristics for fine-grained construction steel
| N |
Normalised or normalised rolled |
| M |
thermo-mechanically rolled |
| L |
Application at low temperatures -50o C |
| NL 1 |
Normalised, low temperatures >= 16 Joule at -50o C |
| NL 2 |
Normalised, low temperatures >= 27 Joule at -50o C |
| NH |
Application at high temperatures (with hot tensile test) |
| Q |
Quenched |
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