Why do people impersonate 09CuPCrNi A weathering steel with ordinary steel

09CuPCrNi A weathering steel is a kind of alloy material. The added copper, nickel, chromium and phosphorus into the 09CuPCrNi A weathering steel can change the growth of rust layer from the original flaky structure to the point-like dense structure, thus preventing air and water from further eroding the matrix and reaching the goal of lengthen life.

Now some people use ordinary steel to counterfeit 09CuPCrNi A weathering steel. BBN steel summarizes some reasons:

First, it is not easy to find and distinguish the two in the initial stage of rusting (within 6 months).
But it takes about one year for the above rust layer to be formed. The initial posture of the rust layer of ordinary steel and 09CuPCrNi A weathering steel is quite similar.

Within six months after rusting, the distinction between the rusting posture of ordinary steel and 09CuPCrNi A weathering steel is not obvious. The reason is that within six months, the dense protective rust layer of 09CuPCrNi A weathering steel has not really grown. So some people will take risks.

Second, the public does not know much about 09CuPCrNi A weathering steel and its function. Many people think that rust steel plate is to rust off.

Third, the modern low-price bidding system and the habit that the building facilities are only guaranteed for 2-3 years will encourage some people to choose low-cost raw materials. So some people will use ordinary steel to counterfeit 09CuPCrNi A weathering steel.