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Tolerances for the steel substrate for prepainted sheet are
covered by the tolerances specified for the unpainted metallic
coated, steel sheet products. For example, for prepainted
GALVALUME® steel sheet, the tolerances are the same as the tolerances
for (unpainted) GALVALUME® steel sheet.
For the paint film, there are distinct requirements for
attributes such as paint film thickness, paint hardness, primer
thickness, paint gloss, etc. These are usually defined by mutual
agreement among the customer, the paint company and the coil
coater.
Hot-Dip Coated
Sheet
U. S. Steel Hot-Dip Coated
Sheet is produced to meet
the dimensional tolerances as shown in the following Tables (I-IV).
If your application requires improved tolerances for performance
reasons, please inquire.
Thickness is measured at any point on the sheet
no less than one inch from an edge.
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Table I
Nominal Thickness
Hot-Dip Coated
Sheet
Coils
Tolerances, Over and Under, for Specified Nominal
Thickness
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Specified
Width, inches
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Over
.101 -.160
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Over
.075 - .101
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Over
.061 - .075
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.061 and
thinner
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24 - 40
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.006
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.006
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.003
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.002
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ver 40 - 60
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.007
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.006
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.003
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.002
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Over 60 - 72
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.007
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.007
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.003
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.002
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Table II
Minimum Thickness
Hot-Dip Coated
Sheet
Coils
Tolerances Over Specified Minimum Thickness
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Specified
Width, inches
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Over
.101 -.160
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Over
.075 - .101
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Over
.061 - .075
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.061 and
thinner
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24 - 40
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.012
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.012
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.006
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.004
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Over 40 - 60
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.014
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.012
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.006
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.004
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Over 60 - 72
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.014
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.014
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.006
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.004
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Table III
Width
Hot-Dip Coated
Sheet
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Specified
Width, inches
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Tolerance Over
Specified
Width, Inches*
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Coils
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24 - 30
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1/8
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Over 30 - 48
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3/16
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Over 48 - 60
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1/4
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Over 60 - 72
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5/16
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*No Tolerance Under
Table IV
Flatness
Hot-Dip Coated Sheet
(Not Specified to Stretcher
Leveled Standard
of Flatness - Coils)
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Specified
Width, inches
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Specified
Width, In.
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Flatness
Tolerances*, In.
(Max. Deviation from a horizontal flat surface).
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Nominal
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Minimum
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.05 & Thinner
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.048 & Thinner
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thru 36
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3/8
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Over 36 - 60
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5/8
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Over 60 - 72
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7/8
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Over .05
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Over .048
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thru 36
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1/4
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Over 36 - 60
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3/8
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Over 60 - 72
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5/8
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*Tolerances are subject to inquiry when the
specified yield strength is in excess of 50 ksi or
higher.
Camber Hot-Dip Coated Sheet Coils
Camber is the greatest deviation of a side from a
straight line. The measurement is taken on the concave side with a
straight edge. The camber tolerance for sheet in coils is 1/2 inch
in any 20 feet of length.
GALVALUME® is a registered trademark of BIEC
International, Inc.
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