Cold Roll Steel Tolerances
Round Bars | Square Bars | Hex Bars | Rectangle Bars | Sheet/Plate | Round Tubes | Key Stock | Balls
| Round Bar | |||
| Alloy(s) | Spec. Diameter, in. | Diameter Tol. (over(+)/under(-)) | |
| 1018, 12L14 | Cold Drawn/Finish | Up to 1.5, incl. | +/- 0.002" |
| 1018, 12L14 | Cold Drawn/Finish | Over 1.5 to 2.5, incl. | +/- 0.003" |
| 1018, 12L14 | Cold Drawn/Finish | Over 2.5 to 4, incl. | +/- 0.004" |
| Round Bar | |||
| Alloy(s) | Spec. Diameter, in. | Diameter Tol. (over(+)/under(-)) | |
| 1045, 1144 | Cold Drawn/Finish | Up to 1.5, incl. | +/- 0.003" |
| 1045, 1144 | Cold Drawn/Finish | Over 1.5 to 2.5, incl. | +/- 0.004" |
| 1045, 1144 | Cold Drawn | Over 2.5 to 4, incl. | +/- 0.005" |
| Metric Round Bar | |||
| Alloy(s) | Spec. Diameter, mm | Diameter Tol. (over(+)/under(-)) | |
| 1018, 1045, 1144-Stress Relieved | TGP | 1.5mm to 38mm | 0/-.0005″ (.0127mm) |
| 1018, 1045, 1144-SR | TGP | 39mm to 63mm | 0/-.00075″ (.0191mm) |
| 1018, 1045, 1144-SR | TGP | 64mm to 75mm | 0/-.001″ (.0254mm) |
| 1018, 1045, 1144-SR | TGP | 80mm to 100mm | 0/-.0015″ (.0981mm) |
| 1018, 1045, 1144-SR | TGP | 105mm to 150mm | 0/-.002″(.0508mm) |
| 1018, 1045, 1144-SR | TGP | 160mm to 200mm | 0/-.0025″(.0635mm) |
| Straightness Tolerance - Round Bar | ||||
| Alloy(s) | Diameter, in. | Length, ft. | Max. Deviation from Straightness in any 10-ft Portion of the Bar | |
| 1018 & 12L14 | Cold Rolled | Less than 5/8 | Less than 15 | 1/8" |
| 1018 & 12L14 | Cold Rolled | Less than 5/8 | 15 and over | 1/8" |
| 1018 & 12L14 | Cold Rolled | 5/8 and over | Less than 15 | 1/16" |
| 1018 & 12L14 | Cold Rolled | 5/8 and over | 15 and over | 1/8" |
| Straightness tolerance will be void once full length is cut | ||||
| Straightness Tolerance - Round Bar | ||||
| Alloy(s) | Diameter, in. | Length, ft. | Max. Deviation from Straightness in any 10-ft Portion of the Bar | |
| 1045 & 1144 | Cold Rolled | Less than 5/8 | Less than 15 | 3/16" |
| 1045 & 1144 | Cold Rolled | Less than 5/8 | 15 and over | 5/16" |
| 1045 & 1144 | Cold Rolled | 5/8 and over | Less than 15 | 1/8" |
| 1045 & 1144 | Cold Rolled | 5/8 and over | 15 and over | 3/16" |
| Straightness tolerance will be void once full length is cut | ||||
| Square Bar | |||
| Alloy(s) | Spec. Square, in. | Square Tol. (over(+)/under(-)) | |
| 1018 | Cold Finish | Up to 0.75, incl. | +/- 0.002" |
| 1018 | Cold Finish | Over 0.75 to 1.5, incl. | +/- 0.003" |
| 1018 | Cold Finish | Over 1.5 to 2.5, incl. | +/- 0.004" |
| 1018 | Cold Finish | Over 2.5 to 4, incl. | +/- 0.006" |
| Metric Square Bar | |||||
| Alloy(s) | Spec. Square, mm | Square Tol. (over(+)/under(-)) | |||
| 1018 Metric | Cold Finish | Over 3mm to 6mm, incl. | + 0, - 0.075mm | ||
| 1018 Metric | Cold Finish | Over 6mm to 10mm, incl. | + 0, - 0.090mm | ||
| 1018 Metric | Cold Finish | Over 10mm to 18mm, incl. | + 0, - 0.110mm | ||
| 1018 Metric | Cold Finish | Over 18mm to 30mm, incl. | + 0, - 0.130mm | ||
| 1018 Metric | Cold Finish | Over 30mm to 50mm, incl. | + 0, - 0.160mm | ||
| Straightness Tolerance - Square Bar | ||||
| Alloy(s) | Height, in. | Length, ft. | Max. Deviation from Straightness in any 10-ft Portion of the Bar | |
| 1018 | Cold Rolled | Less than 5/8 | Less than 15 | 3/16" |
| 1018 | Cold Rolled | Less than 5/8 | 15 and over | 5/16" |
| 1018 | Cold Rolled | 5/8 and over | Less than 15 | 1/8" |
| 1018 | Cold Rolled | 5/8 and over | 15 and over | 3/16" |
| Straightness tolerance will be void once full length is cut | ||||
| Hex Bar | |||||
| Alloy(s) | Spec. Across Flats, in. | Across Flat Tol. (over(+)/under(-)) | |||
| 1018, 12L14 | Up to 0.75 | +/- 0.002" | |||
| 1018, 12L14 | Over 0.75 to 1.5 | +/- 0.003" | |||
| 1018, 12L14 | Over 1.5 to 2.5 | +/- 0.004" | |||
| Metric Hex Bar | |||||
| Alloy(s) | Spec. Across Flats, mm | Across Flats Tol. (over(+)/under(-)) | |||
| 1018 metric | Cold Drawn | Over 3mm to 6mm, incl. | + 0, - 0.075mm | ||
| 1018 metric | Cold Drawn | Over 6mm to 10mm, incl. | + 0, - 0.090mm | ||
| 1018 metric | Cold Drawn | Over 10mm to 18mm, incl. | + 0, - 0.110mm | ||
| 1018 metric | Cold Drawn | Over 18mm to 30mm, incl. | + 0, - 0.130mm | ||
| 1018 metric | Cold Drawn | Over 30mm to 50mm, incl. | + 0, - 0.160mm | ||
| Straightness Tolerance - Hex Bar | ||||
| Alloy(s) | Across Flats, in. | Length, ft. | Max. Deviation from Straightness in any 10-ft Portion of the Bar | |
| 1018 & 12L14 | Cold Rolled | Less than 5/8 | Less than 15 | 3/16" |
| 1018 & 12L14 | Cold Rolled | Less than 5/8 | 15 and over | 5/16" |
| 1018 & 12L14 | Cold Rolled | 5/8 and over | Less than 15 | 1/8" |
| 1018 & 12L14 | Cold Rolled | 5/8 and over | 15 and over | 3/16" |
| Straightness tolerance will be void once full length is cut | ||||
| Rectangle Bar | |||
| Alloy(s) | Spec. Width, in. | Width Tol. (over(+)/under(-)) | |
| 1018 | Cold Finish | Up to 0.75 | +/- 0.003" |
| 1018, 11L17 | Cold Finish | Over 0.75 to 1.5, incl. | +/- 0.004" |
| 1018, 11L17 | Cold Finish | Over 1.5 to 3, incl. | +/- 0.005" |
| 1018, 11L17 | Cold Finish | Over 3 to 4, incl. | +/- 0.006" |
| 1018 | Cold Finish | Over 4 to 6, incl. | +/- 0.008" |
| 1018 | Cold Finish | Over 6 | +/- 0.013" |
| Width governs the tolerances both width and thickness for rectangle bars. 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". |
| Metric Rectangle Bar | |||||
| Alloy(s) | Spec. Thickness, mm | Thickness Tol. (over(+)/under(-)) | Spec. Width, mm | Width Tol. (over(+)/under(-)) | |
| 1018 Metric | Cold Finish | Over 3mm to 6mm, incl. | + 0, - 0.075mm | Up to 18mm, incl. | + 0, - 0.11mm |
| 1018 Metric | Cold Finish | Over 6mm to 10mm, incl. | + 0, - 0.090mm | Over 18mm to 30mm, incl. | + 0, - 0.13mm |
| 1018 Metric | Cold Finish | Over 10mm to 18mm, incl. | + 0, - 0.11mm | Over 30mm to 50mm, incl. | + 0, - 0.16mm |
| 1018 Metric | Cold Finish | Over 18 to 30mm, incl. | + 0, - 0.13mm | Over 50mm to 80mm, incl. | + 0, - 0.19mm |
| 1018 Metric | Cold Finish | Over 30mm to 50mm, incl. | + 0, - 0.16mm | Over 80mm to 100mm, incl. | + 0, - 0.22mm |
| Straightness Tolerance - Rectangle Bar | ||||
| Alloy(s) | Width, in. | Length, ft. | Max. Deviation from Straightness in any 10-ft Portion of the Bar | |
| 1018 & 11L17 | Cold Rolled | Less than 5/8 | Less than 15 | 3/16" |
| 1018 & 11L17 | Cold Rolled | Less than 5/8 | 15 and over | 5/16" |
| 1018 & 11L17 | Cold Rolled | 5/8 and over | Less than 15 | 1/8" |
| 1018 & 11L17 | Cold Rolled | 5/8 and over | 15 and over | 3/16" |
| Straightness tolerance will be void once full length is cut | ||||
| Sheet | ||
| Applicable Alloys: A366/1008 | ||
| Spec. Gage No. | Decimal Equiv., in. | Tolerance Range, in. |
| 7 | 0.1793 | 0.1703 to 0.1883 |
| 8 | 0.1644 | 0.1554 to 0.1734 |
| 9 | 0.1495 | 0.1405 to 0.1585 |
| 10 | 0.1345 | 0.1285 to 0.1405 |
| 11 | 0.1196 | 0.1130 to 0.1256 |
| 12 | 0.1046 | 0.0986 to 0.1106 |
| 13 | 0.0897 | 0.0847 to 0.0947 |
| 14 | 0.0747 | 0.0697 to 0.0797 |
| 15 | 0.0673 | 0.0623 to 0.0723 |
| 16 | 0.0598 | 0.0548 to 0.0648 |
| 17 | 0.0538 | 0.0498 to 0.0548 |
| 18 | 0.0478 | 0.0438 to 0.0518 |
| 19 | 0.0418 | 0.0378 to 0.0458 |
| 20 | 0.0359 | 0.0329 to 0.0389 |
| 21 | 0.0329 | 0.0299 to 0.0359 |
| 22 | 0.0299 | 0.0269 to 0.0329 |
| 23 | 0.0269 | 0.0239 to 0.0299 |
| 24 | 0.0239 | 0.0209 to 0.0269 |
| 25 | 0.0209 | 0.0179 to 0.0239 |
| 26 | 0.0179 | 0.0159 to 0.0199 |
| 27 | 0.0164 | 0.0144 to 0.0184 |
| 28 | 0.0149 | 0.0129 to 0.0169 |
| 29 | 0.0135 | 0.0115 to 0.0155 |
| 30 | 0.0120 | 0.0110 to 0.0130 |
| Sheet | |||
| Applicable Alloys: 1075 Spring Tempered | |||
| Spec. Thickness, in. | Thickness Tol. (over(+)/under(-)) | Spec. Width, in. | Width Tol. (over(+)/under(-)) |
| 0.01 | +/- 0.0008" | 12.375 | +/- 0.125" |
| 0.015 | +/- 0.001" | ... | ... |
| 0.025 | +/- 0.001" | ... | ... |
| 0.032 | +/- 0.001" | ... | ... |
| 0.05 | +/- 0.0015" | ... | ... |
| 0.062 | +/- 0.002" | ... | ... |
| Sheet | |||
| Applicable Alloys: 1095 Spring Tempered | |||
| Spec. Thickness, in. | Thickness Tol. (over(+)/under(-)) | Spec. Width, in. | Width Tol. (over(+)/under(-)) |
| 0.01 | +/- 0.0008" | 12.375 | +/- 0.125" |
| 0.015 | + 0.001, - 0.0008" | ... | ... |
| 0.025 | + 0.001, - 0.0008" | ... | ... |
| 0.032 | +/- 0.001" | ... | ... |
| 0.05 | +/- 0.0015" | ... | ... |
| 0.062 | +/- 0.002" | ... | ... |
| Round Tube | |||||||
| Spec. O.D., in. | O.D. Tol. (over(+)/under(-)) | ||||||
| A513-Type 5 | DOM | Up to 0.499 | + 0.004", - 0" | ||||
| A513-Type 5 | DOM | 0.500 to 1.699 | + 0.005", - 0" | ||||
| A513-Type 5 | DOM | 1.700 to 2.099 | + 0.006", - 0" | ||||
| A513-Type 5 | DOM | 2.100 to 2.499 | + 0.007", - 0" | ||||
| A513-Type 5 | DOM | 2.500 to 2.899 | + 0.008", - 0" | ||||
| A513-Type 5 | DOM | 2.900 to 3.299 | + 0.009", - 0" | ||||
| A513-Type 5 | DOM | 3.300 to 3.699 | + 0.010", - 0" | ||||
| A513-Type 5 | DOM | 3.700 to 4.099 | + 0.011", - 0" | ||||
| A513-Type 5 | DOM | 4.100 to 4.499 | + 0.012", - 0" | ||||
| A513-Type 5 | DOM | 4.500 to 4.899 | + 0.013", - 0" | ||||
| A513-Type 5 | DOM | 4.900 to 5.299 | + 0.014", - 0" | ||||
| A513-Type 5 | DOM | 5.300 to 5.549 | + 0.015", - 0" | ||||
| Spec. O.D., in. | |||||||
| Up to 0.375, excl. | 0.375 to 0.875, incl. | Over 0.875 to 1.875, incl. | Over 1.875 to 3.75, incl. | Over 3.75 to 15, incl. | |||
| Spec. Wall Thickness, in. | Wall Thickness Tol. (over(+)/under(-)) | ||||||
| A513-Type 5 | DOM | 0.035 | +/- 0.002" | +/- 0.002" | +/- 0.002 | +/- 0.002" | ... |
| A513-Type 5 | DOM | 0.049 | ... | +/- 0.002" | + 0.002", - 0.003" | + 0.002", - 0.003" | ... |
| A513-Type 5 | DOM | 0.065 | ... | +/- 0.002" | + 0.002", - 0.003" | + 0.002", - 0.003" | +/- 0.004" |
| A513-Type 5 | DOM | 0.083 | ... | +/- 0.002" | + 0.002", - 0.003" | +/- 0.003" | + 0.004", - 0.005" |
| A513-Type 5 | DOM | 0.095 | ... | +/- 0.002" | + 0.002", - 0.003" | +/- 0.003" | +/- 0.005" |
| A513-Type 5 | DOM | 0.109 | ... | + 0.002", - 0.003" | + 0.002", - 0.004" | +/- 0.003" | +/- 0.005" |
| A513-Type 5 | DOM | 0.120 | ... | +/- 0.003" | + 0.002", - 0.004" | +/- 0.003" | +/- 0.005" |
| A513-Type 5 | DOM | 0.134 | ... | ... | + 0.002", - 0.004" | +/- 0.003" | +/- 0.005" |
| A513-Type 5 | DOM | 0.148 | ... | ... | + 0.002", - 0.004" | +/- 0.003" | +/- 0.005" |
| A513-Type 5 | DOM | 0.165 | ... | ... | + 0.003", - 0.004" | + 0.003", - 0.004" | + 0.005", - 0.006" |
| A513-Type 5 | DOM | 0.180 | ... | ... | +/- 0.004" | + 0.003", - 0.005" | +/- 0.006" |
| A513-Type 5 | DOM | 0.203 | ... | ... | + 0.004", - 0.005" | + 0.004", - 0.005" | + 0.006", - 0.007" |
| A513-Type 5 | DOM | 0.220 | ... | ... | + 0.004", - 0.006" | + 0.004", - 0.006" | +/- 0.007" |
| A513-Type 5 | DOM | 0.238 | ... | ... | + 0.005", - 0.006" | + 0.005", - 0.006" | +/- 0.007" |
| A513-Type 5 | DOM | 0.259 | ... | ... | + 0.005", - 0.006" | + 0.005", - 0.006" | +/- 0.007" |
| A513-Type 5 | DOM | 0.284 | ... | ... | + 0.005", - 0.006" | + 0.005", - 0.006" | +/- 0.007" |
| A513-Type 5 | DOM | 0.300 | ... | ... | +/- 0.006" | +/- 0.006" | +/- 0.008" |
| A513-Type 5 | DOM | 0.320 | ... | ... | +/- 0.007" | +/- 0.007" | +/- 0.008" |
| A513-Type 5 | DOM | 0.344 | ... | ... | +/- 0.008" | +/- 0.008" | +/- 0.009" |
| A513-Type 5 | DOM | 0.375 | ... | ... | ... | +/- 0.009" | +/- 0.009" |
| A513-Type 5 | DOM | 0.400 | ... | ... | ... | +/- 0.010" | +/- 0.010" |
| A513-Type 5 | DOM | 0.438 | ... | ... | ... | +/- 0.011" | +/- 0.011" |
| A513-Type 5 | DOM | 0.460 | ... | ... | ... | +/- 0.012" | +/- 0.012" |
| A513-Type 5 | DOM | 0.480 | ... | ... | ... | +/- 0.012" | +/- 0.012" |
| A513-Type 5 | DOM | 0.531 | ... | ... | ... | +/- 0.013" | +/- 0.013" |
| A513-Type 5 | DOM | 0.563 | ... | ... | ... | +/- 0.013" | +/- 0.013" |
| If specified wall thickness isn't listed, use next closest, largest size listed for tolerance. | |||||||
| Straightness Tolerance - Round Tube | ||
| Alloy(s) | Outside Diameter, in. | Permissible Variations in Straightness |
| A513 | Up to 8, excl. | 0.030" per 3 ft. length (of full length) |
| A513 | 8 and over | 0.060" per 3 ft. length (of full length) |
| Straightness tolerance will be void once full length is cut | ||
| Metric Round Tubes | |||
| Alloy(s) | Spec. O.D. & Wall Thickness, mm | O.D. & Wall Thickness Tol. (over(+)/under(-)) | |
| 1018 | Cold Drawn | 4mm to 32mm | +/- 0.08mm |
| 1018 | Cold Drawn | > 32mm to 40mm | +/- 0.15mm |
| 1018 | Cold Drawn | 42mm to 50mm | +/- 0.20mm |
| 1018 | Cold Drawn | > 50mm to 60mm | +/- 0.25mm |
| 1018 | Cold Drawn | 65mm to 75mm | +/- 0.30mm |
| 1018 | Cold Drawn | 75mm to 80mm | +/- 0.35mm |
| Rectangle Key Stock | ||
| Alloy(s) | Spec. Height/Width, in. or mm | Height or Width Tol. (over(+)/under(-)) |
| 1018 | All Heights | - 0.002" |
| Square Key Stock | ||||
| Alloy(s) | Spec. Height, in. or mm | Height Tol. (over(+)/under(-)) | ||
| 1018 | All Heights | - 0.002" | ||
| Balls | ||||||||
| Grade | Sphericity | Dia. Tolerance per Container/Lot | Diameter Tolerance Per Shipment | Surface Roughness, Ra | ||||
|---|---|---|---|---|---|---|---|---|
| Inches | MM | Inches | MM | Inches | MM | µinch | µm | |
| 10 | 0.00001 | 0.0002 | 0.00002 | 0.0005 | ±0.0001 | ±0.00254 | 1 | 0.025 |
| 15 | 0.00001 | 0.0004 | 0.00003 | 0.0007 | ±0.0001 | ±0.00254 | 1 | 0.025 |
| 25 | 0.000025 | 0.0006 | 0.00005 | 0.0013 | ±0.0001 | ±0.00254 | 2 | 0.05 |
| 50 | 0.00005 | 0.0013 | 0.0001 | 0.0025 | ±0.0002 | ±0.0050 | 3 | 0.08 |
| 100 | 0.0001 | 0.0025 | 0.0002 | 0.0050 | ±0.0005 | ±0.0127 | 5 | 0.125 |
| 200 | 0.0002 | 0.0051 | 0.0004 | 0.0102 | ±0.0010 | ±0.0254 | 8 | 0.2 |
| 300 | 0.0003 | 0.0076 | 0.0006 | 0.0152 | ±0.0015 | ±0.0381 | n/a | n/a |
| 500 | 0.0005 | 0.0127 | 0.001 | 0.025 | ±0.002 | ±0.050 | n/a | n/a |
| 1000 | 0.0010 | 0.0254 | 0.002 | 0.051 | ±0.005 | ±0.127 | n/a | n/a |
| 2000 | n/a | n/a | 0.005 | 0.127 | ±0.005 | ±0.127 | n/a | n/a |
| Burnishing | n/a | n/a | n/a | n/a | ±0.005 | ±0.127 | n/a | n/a |
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