Steel Sheet Squareness Tolerance

Category d 40.

Steel sheet squareness tolerance.

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. 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. Tolerances for sheets and plates cut from coil thickness. 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. The table below gives the basic tolerances for a category a steel. 0 125 to 0 3125 excl 0 002 stainless steel. Out of squareness is defined in fig 2 below.

Flatness tolerances tolerances for flatness vary with the nominal thickness of the product. Category b 15. Squareness is achieved by trimming the sides and or ends. Category c 30.

In addition to achieving a certain length and width tolerance shearing is used to make a sheet square. Tolerances to bs en 10259 for cold rolled wide stainless steel strip thickness tolerance. Squareness tolerances technical resources perforated metal standards the length and width of a sheet may measure correctly but sometimes the sheet is not square. Tolerances for xlerplate lite steel.

The tolerances quoted are effective at the time of. Of course this approach gives rise to rounding errors. 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. Hot rolled plate floorplate sheet and strip rolled on a hot strip mill thickness tolerances as nzs 1365 1996.

Details are provided in as nzs1365 and shown over the page. 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. To check the squareness of a sheet without measuring the angles measurements divided by two. Width governs the tolerances both width and thickness for rectangle bars.

A square sheet has perfect 90 angles in each of the four corners.