Steel S345K
Designation
| Name |
The value |
| Designation GOST Cyrillic |
С345К |
| Designation GOST Latin |
C345K |
| Transliteration |
S345K |
| The chemical elements |
- |
Description
S345K steel is used: for the manufacture of hot-rolled structural shapes (angles, I-beams, channels), sheet, universal broadband rental and roll-formed profiles designed for construction of steel structures with welded and other connections.
Standards
| Name |
Code |
Standards |
| Classification, nomenclature and general norms |
В20 |
GOST 27772-88 |
Chemical composition
| Standard |
C |
S |
P |
Mn |
Cr |
Si |
Ni |
Fe |
Cu |
N |
As |
Al |
| GOST 27772-88 |
≤0.12 |
≤0.04 |
0.07-0.12 |
0.3-0.6 |
0.5-0.8 |
0.17-0.37 |
0.3-0.6 |
The rest |
0.3-0.5 |
≤0.008 |
≤0.08 |
0.08-0.15 |
Fe is the basis.
According to GOST 27772-88 for steel smelted in electric furnaces, the content of N ≤ 0.012% is allowed. Upon agreement of the manufacturer with the consumer, the mass fraction of nickel is allowed up to 0.30%.
Mechanical characteristics
| Section, mm |
sT|s0,2, MPa |
σB, MPa |
d5, % |
kJ/m2, кДж/м2 |
| Plates and wide universal rental in the state of delivery (KCU-40 °C) |
| 4-10 |
≥345 |
≥470 |
≥20 |
≥392 |
| Structural steel in delivery condition (KCU-40 °C) |
| 4-10 |
≥345 |
≥470 |
≥20 |
≥392 |
Description mechanical marks
| Name |
Description |
| Section |
Section |
| sT|s0,2 |
Yield strength or limit of proportionality with a tolerance for residual deformation of 0.2% |
| σB |
Limit short-term strength |
| d5 |
Elongation after rupture |
| kJ/m2 |
Toughness |
Technological properties
| Name |
The value |
| Weldability |
without restrictions |
