The difference between ASTM A242 Type1 weathering steel plate and ordinary steel plate

Steel plate is a very widely used material in modern times. So, what are the differences between ASTM A242 Type1 weathering steel plate and steel plate?

First, At the stage when the steel plate is not long rusted, the naked eye cannot distinguish between ASTM A242 Type1 weathering steel plate and ordinary hot-rolled steel plate. It is necessary to refer to the steel mill’s warranty. The warranty requires the supplier to provide the original with the steel mill’s red stamp as far as possible, so as to avoid the merchant from inferiority,it is good. Provide a sample to a professional third-party testing agency. This method can be used at any stage of testing whether the metal composition matche the long rust in the warranty certificate.

Second, In the first stage of long rusting of steel plate (1-3 months outdoors), ASTM A242 Type1 weathering steel plate begins to grow small rust spots. The rust spots of ordinary steel plates are relatively loose, and some of the rust treatments are poor and even rust peeling occurs.

Third, the second stage of steel long rusting (4-8 months outdoors), ASTM A242 Type1 weathering steel plate has less rust water and smaller rust points; ordinary steel plates have more rust water, and rust points are larger and thinner; ordinary The rust column and tear marks of the steel plate are serious, and there are signs of blackening at the bottom of the workpiece.