*** Applies to specified wall thicknesses (t) equal to or greater than 0.120". For lighter specified wall thicknesses, the minimum elongation values shall be calculated by the formula: % elongation in 2" = 61t+12, rounded to the nearest percent. ** Applies to specified wall thicknesses (t) equal to or greater than 0.180". For lighter specified wall thicknesses, the minimum elongation values shall be calculated by the formula: % elongation in 2" = 56t+17.5, rounded to the nearest percent. * Applies to specified wall thicknesses (t) equal to or greater than 0.120". STRUCTURAL SQUARE AND RECTANGULAR TUBING TOLERANCES Example: 16.0” x 28.0” max finishsize is 15.10” x 27.10”.īend and bow tolerance is 1/8" per 6-foot section. Clean-up stock must be considered when ordering. X Grades rectangles are based on the width of the bar. Example: 20.0” x 25.60” max finish size is 19.0” x 24.6”.Ĭlean-Up Stock Allowances - Cast Iron Rectangles & Squares (GX) X Grades rectangles stock allowance is based on the width of the bar. Minimum clean-up stock allowances are shown below.Ĭlean-Up Stock Allowances - Cast Iron Rectangles & Squares (65-45-12X, 80-55-06X) Rectangles are made to the actual dimensions. The concentricity tolerance between the I.D. Tubes are sold with clean-up stock on the inside and outside diameters. Tubes are typically stocked in grade G2 gray iron or 65-45-12 Ductile, but most stocked sizes and any grade of O.D.
Trepanned tubes are stocked in 72" lengths, but can be produced in longer lengths upon request. tube will receive a tube which is 3.110" O.D. Wall thickness minimums are based on actual O.D. Stock Allowances - Cast Iron Tubes (Gray, Ductile, or Ni-Resist) *** - Turned OD Tolerance is +.080"/-0" and Finish Size is 0.250" below turned OD A 3.000” bar is guaranteed to finish at 3.000”. Stock allowance is a function of the bar diameter. Round bars are made with sufficient stock on the outside diameter to guarantee clean-up at the nominal dimensions.
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