GB 906-82 Cold Drawn Flat Steel Dimensions, Shapes, Weights and Tolerances
This standard specifies the technical requirements, inspection rules, and unified numerical symbols for cold drawn flat steel, including their dimensions, shapes, percentages, permissible extra mass, and allowable tolerance of width, thickness, vertex corner radius, and surface quality.
Table 1- Dimensions of Flat Steel
Table 1 provides the unified numerical symbols for the nominal size, length, width and thickness of cold drawn flat steel, expressed in universal numeric format and expressed in SI (metric) system and inch system.
Table 2- Shape of Flat Steel
Table 2 provides the uniform numerical symbols for hot-rolled flat steel shapes, expressed in types, nominal sizes, and their corresponding graphical symbols (with or without chamfered end and without chamfered end).
Table 3- Mass of Flat Steel
Table 3 provides the unified numerical symbols for the mass of cold drawn flat steel, expressed in SI (metric) system and inch system according to nominal size.
Table 4- Allowed Tolerance of Width, Thickness, Corner Radius and Surface Quality of Cold-Drawn Flat Steel
Table 4 provides the unified numerical symbols for the width, thickness, corner radius and surface quality tolerance of cold-drawn flat steel, expressed in the form of grade numbers for width and thickness tolerances, expressed in universal numerical symbols for corner radius and surface quality tolerances.
Table 5-Deviation of Individual Length for Cold-Drawn Flat Steel
Table 5 provides the unified numerical symbols for the deviation of each length for cold-drawn flat steel, expressed in universal numeric symbols for length differences with respect to the nominal size.
Conclusion
This standard provides the technical requirements, inspection rules, and unified numerical symbols for cold drawn flat steel, including their dimensions, shapes, percentages, permissible extra mass, and allowable tolerance of width, thickness, vertex corner radius, and surface quality. It provides important reference information for the production and application of flat steel.
