astm a588 grade k steel tolerance

ASTM A588 Grade K Steel is a high-strength, low-alloy structural steel with an atmospheric corrosion resistance of up to 50 ksi (345 MPa) in the as-delivered condition and a minimum yield point of 35 ksi (240 MPa). It can be used in riveted, bolted or welded structures in architectural or industrial applications. It has excellent atmospheric corrosion resistance and can be used in bridge construction, building facades and weathering steel and other fields.

There are several tolerance methods available when using ASTM A588 Grade K steel. These methods are designed to ensure that the finished product meets the exact specifications of the client. Once the required tolerances are determined, the material can be cut, formed and welded to create the desired structure.

First and foremost, it is important to adjust the beam section, such as the web and flanges, to the desired tolerances before welding. The necessary adjustments should be made to ensure proper fitup of the beam before welding. When welding, it is important to use a welding technique that is designed for high-strength low-alloy structural steel and use electrodes that are made of the same material as the material to be welded.

When drilling the holes for bolts, the tolerance should not be greater than the drill size plus .010 in (0.254 mm). This will ensure that the hole is properly sized and makes the application stable.

In addition to hole size, when machining ASTM A588 Grade K steel attention must be paid to chamfer size as well. Chamfer size, also referred to as corner radius, should be within .007 in (0.175 mm). Proper chamfer size ensures that two parts can be connected smoothly, allowing for maximum strength.

Finally, when machining ASTM A588 Grade K steel, it is important to consider the surface finish. Typically the desired surface finish, often referred to as the root pass, should not exceed an average roughness of 40 microinches (1.6 microns). It is important to meet the desired surface finish because it can often improve the fatigue life of the weldment.

ASTM A588 Grade K steel can be machined very accurately if proper machining tolerances are followed. Care must be taken to ensure that the parts are properly machined, drilled and welded. Furthermore, all of these steps must be done correctly to ensure that the weldment achieves its design strength.