Key Challenges Facing Structural Steel Fabrication Process

Metals and Mining Review | Tuesday, March 23, 2021

External damage, such as scratches on the surface of structural steel and other raw materials, is a source of concern because it can result in corrosion. Scratches can also be a problem when they impair the aesthetics of the raw materials and, eventually, the end product made from these materials.

Fremont, CA: There are always a number of issues to be concerned about when it comes to structural steel fabrication. Some of these issues are the result of human error, such as miscalculations or straying. And many of them occur as a result of other external factors. If you are considering structural steel fabrication for your next project, you should be aware of what your fabricators go through in order to provide you with valuable and efficient services.

Instant Springback after Fabricating

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Springback is the natural tendency of a structural steel sheet or thin rod to return to its original shape after being released from the forces of the forming tool. We could list several math equations and show you bend allowance and bend deduction charts, discuss the K Factor, or angular proportion between dies, punches, and sheet metal bend radii; but the truth is, that information is not quite relevant or even interesting to those outside of the fabrication industry, such as you. 

Springback frequently causes deformation of the fabricated structure. When looking for ways to compensate for springback, take into account the angles of both the punch and die used in the fabrication. Your steel fabricators will be able to accurately predict the amount of structural steel springback and the degree of bend radius. The greater the springback, the greater the bend radius. Because of springback, the sheet or rod must be bent by a few degrees or more. Over-bending will be precisely calculated by your fabricators to ensure that the final product meets all desired specifications and parameters.

External Damage to Materials

External damage, such as scratches on the surface of structural steel and other raw materials, is a source of concern because it can result in corrosion. Scratches can also be a problem when they impair the aesthetics of the raw materials and, eventually, the end product made from these materials. Many other surface contaminants, such as embedded and loose iron particles, residual adhesives from protective plastics, oil, paint, grease, grinding dust, weld spatter, and so on, can cause rusting and corrosion. Welding can cause surface defects due to the high temperatures involved. All of these must be avoided to avoid any visual or efficiency issues that may arise later. The best way to avoid these issues is for structural steel fabricators to thoroughly inspect raw materials prior to use. A good design is required, which includes the design of the fabricated object or component as well as the design of the welded joints. To avoid these problems, the quality of workmanship and attention to detail are two 'must-haves.'

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