and Information
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It
is the industry practice of Penn Stainless Products, Inc. customers to
order sheet to a "Gauge". This number is commonly used in the industry and
references a specific thickness. The gauge number and thickness may vary
between suppliers. The following table is the conversion utilized by North
American Stainless. The tolerances are from A480-05, Table A2.5.
Sheet can also be ordered to different finishes. A description of the standard finishes available on sheet follows. Penn Stainless Products does not have the capability to polish sheet but will outsource the polishing when required by the customer.
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| Unpolished or Rolled Finishes | |
| No 1 | A rough, dull surface, which results from hot rolling to the specified thickness, followed by annealing and descaling. |
| No 2D | A dull finish which results from cold rolling followed by annealing and descaling, and may perhaps gets a final light roll pass through unpolished rolls. A 2D finish is used where appearance is of no concern. |
| No 2B | A bright, cold-rolled finish resulting in the same manner as No.2D finish, except that the annealed and descaled sheet received a final light roll pass through polished rolls. This is the general-purpose cold-rolled finish that can be used as is, or a preliminary step to polishing. |
| BA Bright Anneal | The bright annealed mill surface is obtained by annealing the material under an atmosphere so that scale is not produced on the surface. |
| Polished Finishes | |
| No 3 | An intermediate polished surface obtained by finishing with a 100-grit abrasive. Generally used where a semi finished polished surface is required. A No. 3 finish usually receives additional polishing during fabrication. |
| No 4 | A polished surface obtained by finishing with a 120-150 mesh abrasive, following initial grinding with coarser abrasives. This is a general purpose bright finish with a visible "grain" which prevents mirror reflection. |
| No 6 | A dull satin finish having lower reflectivity than No 4 finish. It is produced by Tampico brushing the No. 4 finish in a medium of abrasive and oil. It is used for architectural applications and ornamentation where a high luster is undesirable, and to contrast with brighter finishes. |
| No 7 | A highly reflective finish that is obtained by buffing finely ground surfaces but not to the extent of completely removing the "grit" lines. It is used chiefly for architectural and ornamental purposes. |
| No 8 | The most reflective surface, which is obtained by polishing with successively finer abrasives and buffing extensively until all grit lines from preliminary grinding operations are removed. It is used for applications such as mirrors and reflectors. |
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| Permitted Variations in Over and
Under for specified width in Inches |
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| Sheet gauge to Thickness Conversion |
Less than 40" | 40" to Less Than 50" |
50" to less than 84" |
WT Per
Sq/ft |
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| 7GA | 0.1875" | 0.007 | 0.007 | 0.0075 | 7.877 |
| 8GA | 0.1650" | 0.007 | 0.007 | 0.0075 | 6.931 |
| 10GA | 0.1350" | 0.007 | 0.007 | 0.007 | 5.670 |
| 11GA | 0.1200" | 0.007 | 0.007 | 0.007 | 5.040 |
| 12GA | 0.1050" | 0.005 | 0.005 | 0.006 | 4.410 |
| 13GA | 0.0900" | 0.004 | 0.004 | 0.005 | 3.780 |
| 14GA | 0.0750" | 0.004 | 0.004 | 0.0045 | 3.15 |
| 16GA | 0.0600" | 0.004 | 0.004 | 0.0045 | 2.52 |
| 18GA | 0.0480" | 0.003 | 0.003 | 0.004 | 2.016 |
| 20GA | 0.0360" | 0.0025 | 0.0025 | 0.003 | 1.512 |
| 22GA | 0.0300" | 0.002 | 0.002 | XXXX | 1.260 |
| 24GA | 0.0240" | 0.002 | 0.002 | XXXX | 1.008 |
| 26GA | 0.0180" | 0.0015 | 0.0015 | XXXX | 0.756 |
| 28GA | 0.0150" | 0.0015 | 0.0015 | XXXX | 0.6301 |
| 30GA | 0.0120" | 0.001 | XXXX | XXXX | 0.5000 |
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| Penn Stainless Products 190 Kelly Road Quakertown, PA 18951 |
Toll Free: 1-800-222-6144 Phone: 215-536-3053 Fax: 215-536-3255 Email: sales@pennstainless.com |
