The weathering resistance mechanism of TB/T 1979 05CuPCrNi atmospheric corrosion resistant steel plate is different from that of the general corrosion resistant alloy steel. The Cu element in 05CuPCrNi steel has the effect of electrochemical depolarization, which causes the steel base surface to form a tight and firm protective film for a certain time, so as to slow down the erosion of atmospheric factors.
TB/T 1979 05CuPCrNi atmospheric corrosion resistant steel plate chemical composition:
| C max | Si | Mn | P | S max | Cu | Ti | Cr | Ni | Re |
| 0.090 | 025-0.50 | 0.20-0.50 | 0.060-0.12 | 0.020 | 0.25–0.50 | - | 0.30-1.25 | 0.12-0.65 | - |
TB/T 1979 05CuPCrNi atmospheric corrosion resistant steel plate mechanical property:
| Grade | Yield Strength (MPa) min. | Tensile Strength (MPa) min. | Elongation min. % |
| TB/T 1979 05CuPCrNi | 310 | 440 | 26 |
TB/T 1979 05CuPCrNi atmospheric corrosion resistant steel plate is also known as 05CuPCrNi weathering steel. The 05CuPCrNi steel has a wide range of applications, especially in railway transport vehicles and urban infrastructure. TB/T 1979 05CuPCrNi atmospheric corrosion resistant steel plates are widely used in bridges, railway vehicles and buildings, etc.
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