Q295GNHand Q355GNH high weather resistance structural steel
High weather resistance structural steel products
Standard: GB/T 4171
Grades: Q295GNH, Q355GNH
High weather-resistant structural steel products are mainly used in structures such as vehicles, containers, buildings, towers or other structural parts. Compared with Q355NH welded weather-resistant steel, they have better atmospheric corrosion resistance.
Q295GNH and Q355GNH steel product size
Grades |
Quality levels |
Size/mm |
|
|
Coils and sheets |
Medium plate |
||
|
Q295GNH |
A, B, C, D, E |
1.5-19×800-1600 |
6-50×1600-3250 |
|
Q355GNH |
1.5-19×800-1600 |
6-50×1600-3250 |
|
Chemical composition of Q295GNHand Q355GNH:
Grades |
chemical composition/% |
|||||||
|
C |
Si |
Mn |
P |
S |
Cr |
Cu |
Ni |
|
|
Q295GNH |
≤0.12 |
0.1-0.4 |
0.2-0.50 |
0.07-0.12 |
≤0.020 |
0.3-0.65 |
0.25-0.45 |
0.25-0.5 |
|
Q355GNH |
≤0.12 |
0.25-0.75 |
≤1.0 |
0.07-0.15 |
≤0.020 |
0.3-1.25 |
0.25-0.55 |
≤0.65 |
Mechanical properties of Q295GNHand Q355GNH structural steel
Grades |
Yield strength/MPa |
Tensile strength/MPa |
Elongation/% |
|
Q295GNH |
≥295 |
360-510 |
≥24 |
|
Q355GNH |
≥355 |
490-630 |
≥22 |
GB/T 4171 Q295GNH and Q355GNH high weather resistance structural steel plates are mainly used in the manufacture of structural parts such as containers, railway vehicles, oil derricks, seaport buildings, oil production platforms, and containers containing hydrogen sulfide corrosive media in chemical and petroleum equipment.
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