Why Does the Surface of 304 Stainless Steel Angle Bar Appear Rough

Generally speaking, a rough surface stainless steel angle bar is thicker than a smooth surface angle bar, which can improve the corrosion resistance and lifespan of them. Although the appearance is not as aesthetically pleasing as a smooth surface, in most cases, this defect is acceptable and should not be a reason for rejection based on quality.

We use surface roughness to describe the microscopic geometric features of stainless steel angel bar surface, including small spacing and the roughness of micro-peaks and valleys. There are various methods available to measure surface roughness, such as optical methods, comparison methods, needle methods, and imprint methods.

Reasons for the rough surface of 304 stainless steel angle bar are as follows:

1. The “pickling” process carried out during the production and processing can have an impact on the surface of the angle bar, making it rough or leaving imprints.

2. The composition or surface condition of the steel chosen for angle bar manufacturing can also affect its surface roughness. The smoothness or roughness of the surface is relative. If the steel material used for angle bar has a rough surface, is not flat, or has rust pits or obvious rolling patterns, then after production, the surface will generally not be smoother than initially.