Q355NHB-Z15 Q355NHB-Z25 Q355NHB-Z35 weathering steel plate

Q355NHB-Z15, Q355NHB-Z25 and Q355NHB-Z35 are weathering steels but also belong to low alloy series. The letter Q is the letter of yield; The number 355 refers to its yield strength of 355MPa; The letter NH means weather proof; The letter B represents the grade of steel and is read as Q355 weathering B. Q355NHB steel has the advantages of rust resistance and air corrosion resistance. The use of weathering steel as structural members has excellent features of corrosion resistance, life extension, thinning and consumption reduction, labor saving and energy saving.

Implementation standards of Q355NHB-Z15, Q355NHB-Z25 and Q355NHB-Z35 weathering steel plate: the national standard GB/T 4171 is implemented. The surface quality of Q355NHB-Z15, Q355NHB-Z25 and Q355NHB-Z35 steel shall conform to the rules of GB/T 247.

Q355NHB-Z15, Q355NHB-Z25, Q355NHB-Z35 weathering steel plate chemical composition:
C: 0.12-0.21; Mn: 0.7-2.0; Si: 0.2-2.0; P: Not more than 0.034; S: Not more than 0.036; Cu: 0.10-0.40.

Q355NHB-Z15, Q355NHB-Z25, Q355NHB-Z35 steel plate mechanical properties:
Yield strength: 325 Mpa;
Tensile strength: 490-630 Mpa;
Elongation: 21%

Application of Q355NHB-Z15, Q355NHB-Z25 and Q355NHB-Z35 weathering steel plate:
It is used for railway, vehicle, bridge, tower and other steel structures exposed to air (atmosphere) for a long time. Weathering steel is used to manufacture containers, railway vehicles, oil derricks, seaport buildings, oil extraction routes, containers containing hydrogen sulfide corrosion medium in chemical and petroleum equipment and other structural parts.