Steel Sheet Squareness Tolerance

Sheets specified to stretcher leveled standard of flatness exclusive of 1 4 2 3 4 and full hard tem pers of 200 and 300 series grades.

Steel sheet squareness tolerance.

0 125 to 0 3125 excl 0 002 stainless steel. Flatness tolerances tolerances for flatness vary with the nominal thickness of the product. To check the squareness of a sheet without measuring the angles measurements divided by two. If the bar is 1 5 thick x 3 5 wide the width tolerance of 0 006 will be the tolerance for the thickness as well which is 0 006.

Checked for by measuring the distance between diagonally opposing corners the amount a sheet is out of square is determined by taking 1 2 the difference of the measurements. Tolerances to bs en 10259 for cold rolled wide stainless steel strip thickness tolerance. Tolerances for xlerplate lite steel. Category b 15.

The tolerances quoted are effective at the time of. In addition to achieving a certain length and width tolerance shearing is used to make a sheet square. The standard then states that these basic tolerances are increased by a based on the category. Option 1 the out of squareness of sheets plates and cut lengths shall not exceed 0 5 of the width of the product.

Squareness is achieved by trimming the sides and or ends. Of course this approach gives rise to rounding errors. Tolerances in a convenient form to users of bluescope steel products. Hot rolled plate floorplate sheet and strip rolled on a hot strip mill thickness tolerances as nzs 1365 1996.

Tolerances for sheets and plates cut from coil thickness. Category d 40. Details are provided in as nzs1365 and shown over the page. Width governs the tolerances both width and thickness for rectangle bars.

Category c 30. Flatness tolerance thickness width length maximum deviation in in in from a horizontal inches inches inches flat surface in inches 3 16 48 96 1 8 3 16 48 96 1 4 3 16 48. The table below gives the basic tolerances for a category a steel. Squareness tolerances technical resources perforated metal standards the length and width of a sheet may measure correctly but sometimes the sheet is not square.

Out of squareness is defined in fig 2 below.