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GB/T 4171 Q355GNH weather steel plate, namely atmospheric corrosion resistant steel, is between the ordinary steel and stainless steel low alloy steel series, GB/T 4171 Q355GNH weather steel plate is by general carbon steel with a small amount of copper and nickel and other corrosion resistant elements, with high quality steel welding, cutting, abrasion and high temperature fatigue characteristics.
GB/T 4171 Q355GNH weather steel plate chemical composition
| Grade |
C |
Si |
Mn |
P |
S |
Cu |
Cr |
Ni |
|
Q355GNH |
0.12 |
0.25-0.75 |
1 |
0.07-0.15 |
0.02 |
0.20-0.55 |
0.30-1.25 |
0.65 |
GB/T 4171 Q355GNH weather steel plate mechanical properties
| Grade |
Yield strength |
Tensile strength |
% Elongation in 2 in.(50mm) min |
|
Q355GNH |
355 |
490-630 |
22 |
GB/T 4171 Q355GNH weather steel plate is mainly used in railway vehicles, bridges, towers and other steel structures which are exposed to the atmosphere for a long time.
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