ASTM A 635/A 635 M Norms for Steel, Sheet and Strip, 
Heavy-Thickness Coils, Carbon, Hot-Rolled

ASTM  A635 Specifications for Steel, Sheet and Strip, 
Heavy-Thickness Coils, Carbon, Hot-Rolled

Standard Thickness Tolerances [Metric] for Heavy-Thickness Hot-Rolled Sheet 
Ordered to Minimum Thickness (Carbon Steel)—10-mm (Cut Edge) and 
20-mm (Mill Edge) Minimum Edge Distance (Coils Only)

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NOTE 1—Thickness is measured at any point across the width not less than 10 mm from a cut edge and not less than 20 mm from a mill edge. This table does not apply to the uncropped ends of mill edge coils.
NOTE 2—The specified thickness range captions also apply when sheet is specified to a nominal thickness, and the tolerances are divided equally, over and under.
NOTE 3—Micrometers used for measurement of thickness shall be constructed with anvils and spindles having minimum diameters of 0.188 in. [4.80 mm]. The tip of the spindle shall be flat, and the tip of the anvil shall be flat or rounded with a minimum radius of curvature of 0.10 in. [2.55 mm]. Micrometers with pointed tips are not suitable for thickness measurements.
Specified Width, mm Thickness Tolerances, mm, No Tolerance Under
Specified Minimum Thickness, mm
From 4.5 to 6.0, incl Over 6.0 to 8.0, incl Over 8.0 to 10.0, incl Over 10.0 to 12.5, incl Over 12.5 to 16.0, incl Over 16.0 to 25.0, incl
Over 300 to 600, incl A 0.56 0.60 0.64 0.70 0.76
Over 600 to 1200, incl A 0.60 0.64 0.70 0.76 0.80
Over 1200 to 1500, incl 0.50 0.60 0.70 0.76 0.80 0.84
Over 1500 to 1800, incl 0.56 0.64 0.76 0.80 0.90 0.96
Over 1800 0.60 0.72 0.80 0.90 0.96 1.00
A Product not available in this size range.


Restricted Thickness Tolerances [Metric] for Heavy-Thickness Hot-Rolled Sheet 
Ordered to Minimum Thickness (Carbon Steel)—15-mm (Cut Edge) and 
25-mm (Mill Edge) Minimum Edge Distance (Coils Only)

NOTE 1—Thickness is measured at any point across the width not less than 15 mm from a cut edge and not less than 25 mm from a mill edge. This table does not apply to the uncropped ends of mill edge coils.
NOTE 2—The specified thickness range captions also apply when sheet is specified to a nominal thickness, and the tolerances are divided equally, over and under.
NOTE 3—Micrometers used for measurement of thickness shall be constructed with anvils and spindles having minimum diameters of 0.188 in. [4.80 mm]. The tip of the spindle shall be flat, and the tip of the anvil shall be flat or rounded with a minimum radius of curvature of 0.10 in. [2.55 mm]. Micrometers with pointed tips are not suitable for thickness measurements.
NOTE 4—This table was constructed by multiplying the values in the standard table by 0.75 and rounding to 2 decimal places using standard ASTM practice.

Specified Width, mm

 Thickness Tolerances, mm, No Tolerance Under
Specified Minimum Thickness, mm
From 4.5 to 6.0, incl Over 6.0 to 8.0, incl Over 8.0 to 10.0, incl Over 10.0 to 12.5, incl Over 12.5 to 16.0, incl Over 16.0 to 25.0, incl
Over 300 to 600, incl A 0.42 0.45 0.48 0.52 0.57
Over 600 to 1200, incl A 0.45 0.48 0.52 0.57 0.60
Over 1200 to 1500, incl 0.38 0.45 0.52 0.57 0.60 0.63
Over 1500 to 1800, incl 0.42 0.48 0.57 0.60 0.68 0.72
Over 1800 0.45 0.54 0.60 0.68 0.72 0.75
A Product not available in this size range.


Width Tolerances for Heavy-Thickness 
Mill-Edge Sheet Steel (Coils Only)

Width Tolerances for Heavy-Thickness 
Cut-Edge Sheet Steel (Coils Only)

NOTE 1—This table does not apply to the uncropped end of mill-edge coils.

Specified Width, mm

 Width Tolerance,
Plus Only, mm
Over Through
300 600 16
600 1200 28
1200 1500 38
1500 1800 45
1800 --- 50

Specified Width, mm

 Width Tolerance,
Plus Only, mm
Over Through
300 600 16
600 1200 28
1200 1500 38
1500 1800 45
1800 --- 50


Camber Tolerances for Heavy-Thickness 
Sheet Steel (Coils Only)

NOTE 1—Camber is the deviation of a side edge from a straight line. Such a deviation is measured by placing a straightedge on the concave side and measuring the greatest distance between the sheet edge and the straightedge.

Camber should not exceed 25 mm in any 6000 mm of length


Standard Thickness Tolerances [Metric] for Heavy-Thickness 
Hot-Rolled Strip Ordered to Minimum Thickness (Carbon Steel)-
10-mm Minimum Edge Distance (Coils Only)

NOTE 1—Thickness measurements for this table are taken 10 mm from the edge of the strip. These tolerances do not include crown, and, therefore, the tolerances given in Table A1.8 are in addition to those in this table.
NOTE 2—Micrometers used for measurement of thickness shall be constructed with anvils and spindles having minimum diameters of 0.188 in. [4.80 mm]. The tip of the spindle shall be flat, and the tip of the anvil shall be flat or rounded with a minimum radius of curvature of 0.10 in. [2.55 mm]. Micrometers with pointed tips are not suitable for thickness measurements.

Specified Width, mm

 Thickness Tolerances, mm, No Tolerance Under
Specified Nominal Thickness, mm
From 6.0 to
8.0, incl		 Over 8.0 to
12.5, incl		 Over 12.5
to 16.0, incl		 Over 16.0 to
25.0, incl
Over 200 to 300, incl 0.40 0.50 0.55 0.60


restricted Thickness Tolerances [Metric] for Heavy-Thickness 
Hot-Rolled Strip Ordered to Minimum Thickness (Carbon Steel)-
15-mm Minimum Edge Distance (Coils Only)

NOTE 1—Thickness measurements for this table are taken 15 mm for the edge of the strip. These tolerances do not include crown, and, therefore, the tolerance given in Table A1.8 are in addition to those in this table.
NOTE 2—Micrometers used for measurement of thickness shall be constructed with anvils and spindles having minimum diameters of 0.188 in. [4.80 mm]. The tip of the spindle shall be flat, and the tip of the anvil shall be flat or rounded with a minimum radius of curvature of 0.10 in. [2.55 mm]. Micrometers with pointed tips are not suitable for thickness measurements.
NOTE 3—This table was constructed by multiplying the values in the standard table by 0.75 and rounding to 2 decimal places using standard ASTM practice.

Specified Width, mm

 Thickness Tolerances, mm, No Tolerance Under
Specified Nominal Thickness, mm
From 6.0 to
8.0, incl		 Over 8.0 to
12.5, incl		 Over 12.5
to 16.0, incl		 Over 16.0 to
25.0, incl
Over 200 to 300, incl 0.30 0.38 0.41 0.45


Crown Tolerances for Heavy-Thickness Strip Steel (Coils Only)

NOTE 1—Strip may be thicker at the center than at a point 10.0 mm from the edge by the amount given in the table.
Specified Widths, mm

Crown Tolerances for
Specified Thickness and Width Given, mm
Over Through Over 6.0 to 19, incl
200 300 0.05


Width Tolerances for Heavy-Thickness Strip (Coils Only)

Specified Widths, mm

Tolerances for Specified Width for Thickness Given, Plus and Minus, mm
Over Through Mill Edge and Square
Edge, All Thicknesses		 Slit or Cut
Edge
200 300 0.05 A

A The manufacturer must be consulted.


Camber Tolerances for Heavy-Thickness Strip (Coils Only)

NOTE 1—Camber is the deviation of a side edge from a straight line. Such a deviation is obtained by placing a 2000-mm straightedge on the concave side and measuring the greatest distance between the strip edge and the straightedge.

For strip over 200 mm to 300 mm, incl

 5 mm in any 2000 mm

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