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USS Electrolyte Zinc and
Zinc-Iron Alloy 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.
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Table I
Nominal Thickness
Electrogalvanized
Sheet - Carbon and
High Strength Steel Coils
Tolerances, Over and Under, for Specified Nominal
Thickness
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Specified
Width, inches
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Over
.098 - .142
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Over
.057 - .098
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Over
.019* - .057
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.014
- .019
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24 - 72
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.003
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.003
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.002
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.001
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Over 72
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.004
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.003
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.002
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.001
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*Minimum thickness, .022 inch nominal for
high strength steel.
Note: Thickness is measured at any point across the width not less than
one inch from a side edge.
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Table II
Minimal Thickness
Electrogalvanized
Sheet - Carbon and
High Strength Steel Coils
Tolerances, Over and Under, for Specified Nominal
Thickness
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Specified
Width, inches
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Over
.098 -.142
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Over
.057 - .098
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Over
.019* - .057
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.014
- .019
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24 - 72
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.006
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.006
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.004
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.002
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Over 72
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.008
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.006
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.004
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----
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*Minimum thickness, .020 inch for high
strength steel.
Note: Thickness is measured at any point across the width not less than
one inch from a side edge.
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Table III
Width
Electrogalvanized
Sheet - Carbon and High Strength Steel Coils
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Specified
Width, inches
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Tolerances,
Over Specified Width, Inches
No Tolerance Under
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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 to 72
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5/16
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Table IV
Flatness
Electrogalvanized
Sheet
(Not Specified to Stretcher Leveled Standard
of Flatness - Coils)
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Thickness,
inches
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Specified
Width, In.
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Flatness
Tolerances*, Inches
Specified Yield Strength, min. ksi.
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Nominal
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Minimum
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Under
45
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45
- 50**
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.046
& Thinner
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.044
& Thinner
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24
- 36 |
3/8
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3/4
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Over 36 - 60 |
5/8
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1 1/8
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Over 60 - 72 |
7/8
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1 1/2
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Over .046
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Over .044
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24 - 36 |
1/4
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3/4
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Over 36 - 60 |
3/8
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3/4
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Over 60 - 72 |
5/8
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1 1/8
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Note 1 - Table IV does not
apply when product is ordered full hard.
Note 2 - Table IV also applies to lengths cut from coils by our
customer when adequate flattening measures are performed.
*Maximum deviation from a horizontal flat surface.
**Tolerances for high strength steel with specified minimum yield strength
in excess of 50 ksi are subject to negotiation.
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, where applicable, the coil coater.
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