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Introduction of high weathering steel Q355GNH

Posted:2021-01-04 13:47:57

High weathering steel Q355GNH, also known as atmospheric corrosion resistant steel, is a kind of low alloy steel series existing between stainless steel and ordinary steel. A small amount of copper, nickel and other corrosion-resistant elements are added to plain carbon steel to make it have the characteristics of high-quality steel, such as plastic drawing, welding and cutting, toughness, abrasion, forming, fatigue resistance, high temperature, etc.

Chemical composition of high weathering steel Q355GNH:
C: ≤0.12, S: 0.20-0.75, Mn: ≤1.00, P: 0.07-0.75, S: ≤0.020, Cu: 0.25-0.55, Cr: 0.30-1.25, Ni: ≤0.25

The mechanical properties of high weathering steel Q355GNH are as follows:
Tensile strength: ≥ 490 - 630 MPa;
Yield strength: ≤ 355 MPa;
Elongation: ≤ 26%.

High weathering steel Q355GNH is often used to manufacture structural parts such as railway vehicles, port buildings, containers, oil production platforms, chemical and petroleum equipment and containers containing hydrogen sulfide corrosive medium in oil derrick. High weathering steel Q355GNH can also be used to manufacture tower, railway, bridge, vehicle and other steel structures exposed to the atmosphere for a long time.