A comprehensive introduction of Q355GNH high weather resistant steel plate

Q355GNH is a kind of high weather resistant steel plate. High weather resistant steel plate is divided into four grades: Q295GNH, Q355GNH, Q265GNH, and Q310GNH according to the standard.

Chemical composition of Q355GNH high weather resistant steel plate
Grade	C	Si	Mn	P	S	Cu	Cr	Ni
Q355GNH	≤0.12	0.20~0.75	≤1.00	0.07~0.15	≤0.020	0.25-0.55	0.30~1.25	≤0.65

Q355GNH high weather resistant steel plate tensile yield strength:

Tensile strength: 490-630Mpa

Yield strength: 345Mpa

Elongation: 19%

180°bending test: d=3a

Features of Q355GNH high weather resistant steel plate:

1. Rust and corrosion resistance, 4-8 times higher atmospheric corrosion resistance than ordinary steel;

2. Q355GNH high weather resistant steel plates are recyclable, low-carbon and environmentally friendly;

3. Steel parts are anti-corrosion and life extension, thinning and consumption reduction, saving labor and energy;

4. Green and environmental protection, no need for initial painting. Q355GNH high weather resistant steel plate can reduce the use of fireproof coatings, thereby reducing pollution, shortening the construction period, reducing costs and reducing maintenance.