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Cold Roll Steel Tolerances


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Round Bars | Square Bars | Hex Bars | Rectangle Bars | Sheet/Plate | Round Tubes | Key Stock

 

 

 

 

 

 

 

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"