1.1This specification covers cold-rolled steel sheet in coils or in cut lengths, tin-coated by electrodeposition. The product is commonly known as electrolytic tin-coated sheet, and is for applications that need good solderability, good surface appearance, and a degree of corrosion resistance. Tin-coated sheet is produced to various designations of tin coating, as outlined in Table 1.
TABLE 1 Electrolytic Tin-Coated Sheets Coating Weight [Mass]
Note 1—
Listed below are the commonly produced coating weights [mass] upon agreement between the producer and the purchaser. Other combinations of coatings may be specified and the appropriate minimum average test valuesA apply. | Designation No. | Nominal Tin Coating
Weight [Mass]
(Each Surface)
lb/base box (g/m2)B | Minimum Average Coating
Weight [Mass]
(Each Surface Test Value)
lb/base box (g/m2)B, C |
| 5 (0.6/0.6) | 0.025/0.025 (0.6/0.6) | 0.02/0.02 (0.5/0.5) |
| 10 (1.1/1.1) | 0.05/0.05 (1.1/1.1) | 0.04/0.04 (0.9/0.9) |
| 15 (1.7/1.7) | 0.075/0.075 (1.7/1.7) | 0.06/0.06 (1.4/1.4) |
| 20 (2.2/2.2) | 0.10/0.10 (2.2/2.2) | 0.08/0.08 (1.8/1.8) |
| 25 (2.8/2.8) | 0.125/0.125 (2.8/2.8) | 0.11/0.11 (2.5/2.5) |
| 50 (5.6/5.6) | 0.25/0.25 (5.6/5.6) | 0.23/0.23 (5.2/5.2) |
| 75 (8.4/8.4) | 0.375/0.375 (8.4/8.4) | 0.35/0.35 (7.8/7.8) |
| 100 (11.2/11.2) | 0.50/0.50 (11.2/11.2) | 0.45/0.45 (10.1/10.1) |
1.1.1Electrolytic tin-coated sheet is customarily available as commercial steel (CS); drawing steel (DS); deep drawing steel (DDS); extra deep drawing steel (EDDS), and structural steel (SS). The tin coating is available as unmelted or melted.
1.2Limitations—This specification is applicable to orders in either inch-pound units (as A599), which is supplied in thicknesses from 0.015 in. to 0.036 in., or SI units [as A599M], which is supplied in thicknesses from 0.381 mm to 0.914 mm. For thicknesses lighter than 0.015 in. [0.381 mm], refer to A624/A624M [A624M].
1.3Unless the order shows the “M” designation [SI units], the product shall be furnished to inch-pound units. The values stated in either inch-pound or SI units are to be regarded as standard. Within the text, the SI units are shown in brackets. The values stated in each system are not exact equivalents; therefore, each system must be used independently of the other. Combining values from the two systems may result in nonconformance with this specification.
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