Products Description
Q345E steel sheet has a minimum yield strength of 345 MPa and a tensile strength exceeding 470 MPa, providing excellent mechanical performance for structural applications.
During the rolling process of Q345E steel plate, impact tests are conducted at low temperatures of -40°C to ensure sufficient toughness and resistance to brittle fracture in cold environments.
This makes Q345E steel particularly suitable for applications requiring high strength and reliable performance under harsh or sub-zero conditions.
Q345E Chemical compositionMax % of the Product analysis of grade
|
C |
Si |
Mn |
P |
S |
Nb |
V |
Ti |
|
0.18 |
0.50 |
1.70 |
0.025 |
0.020 |
0.07 |
0.15 |
0.20 |
|
Cr |
Ni |
Cu |
N |
Mo |
B |
Als min |
|
|
0.30 |
0.50 |
0.30 |
0.012 |
0.10 |
- |
0.015 |
|
Q345E Yield strength
|
Nominal thickness (mm) |
To 16 |
16-40 |
40-63 |
63-80 |
80- 100 |
100- 150 |
150- 200 |
200- 250 |
250- 400 |
|
ReH - Minimum yield strength (MPa) |
345 |
335 |
325 |
315 |
305 |
285 |
275 |
265 |
265 |
Q345E Tensile Strength
|
Nominal thickness (mm) |
To 40 |
40-63 |
63-80 |
80-100 |
100-150 |
150-250 |
250-400 |
|
ReH - Minimum yield strength (MPa) |
470-630 |
470-630 |
470-630 |
470-630 |
450-600 |
450-600 |
450-600 |
Q345E Impact Test degree and energy
|
|
Min Energy Nominal thickness |
||
|
Temperature ℃ |
-40 |
||
|
Thickness (mm) |
12-150 |
150-250 |
250-400 |
|
Notch impact test. Min. absorbed energy |
34 |
27 |
27 |
Application difference Q345
As Q345 and Q235 alloy element content is different, their applications are quite different.
Q235 carbon structural steel is made for metal construction that doesn't have high demand for steel strength, tie rod, connecting rod, hook, coupler, bolt and nut, sleeve, shaft and welding parts.
Q345 is low alloy structural steel with good mechanical properties, low temperature performance, plasticity and good weldability, it is mostly used in low pressure vessel, oil tank, vehicles, cranes, mining machinery, power stations, mechanical parts, building structure, general metal parts, Q345(E) steel plate is always delivered in hot rolled or normalizing state, can be used in areas where its temperature is above -40 ℃.
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