ASTM A657/A657M-03

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Designation: A 657/A 657M – 03
Standard Specification for
Tin Mill Products, Black Plate Electrolytic Chromium-
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Coated, Single and Double Reduced
This standard is issued under the fixed designationA657/A657M; the number immediately following the designation indicates the year
of original adoption or, in the case of revision, the year of last revision. A number in parentheses indicates the year of last reapproval.
A superscript epsilon (e) indicates an editorial change since the last revision or reapproval.
1. Scope 3. Ordering Information
1.1 This specification covers single- and double-reduced tin 3.1 Orders for product under this specification shall include
mill black plate electrolytically coated with chromium and the following information, as required and applicable, to
chromium oxide. The steel is furnished in coils and cut lengths adequately describe the desired product:
for use in the manufacture of cans, closures, crowns, and other 3.1.1 Name of product (include whether single- or double-
products. reduced),
1.2 This specification is applicable to orders in either 3.1.2 Thickness (must be consistent with intended applica-
inch-pound units (as A 657) which is supplied in thicknesses tion),
from 0.0050 to 0.0149 in. or in SI units [as A 657M] which is 3.1.3 Oiling (Section 6),
supplied in thicknesses from 0.127 to 0.378 mm. 3.1.4 Steel type (MR, L, etc.),
1.3 The values stated in either inch-pound or SI units are to 3.1.5 Temper designation (T-3, T-4, etc. for single-reduced)
be regarded as standard.Within the text, the SI units are shown or mechanical designation (DR-8, DR-9, etc., double-reduced),
in brackets. The values stated in each system are not exact 3.1.6 Surface finish (7B, 7C, etc.).
equivalents. Therefore, each system must be used indepen- 3.1.7 Coil width or cut size,
dently of the other. Combining values from the two systems 3.1.8 Rolling direction must be specified on cut sizes and
may result in nonconformance with this specification. should be indicated by underlining the slit (rolling width)
1.4 This standard does not purport to address all of the dimension,
safety concerns, if any, associated with its use. It is the 3.1.9 On coils, specify minimum or range of acceptable
responsibility of the user of this standard to establish appro- inside diameters. The standard inside diameter is approxi-
priate safety and health practices and determine the applica- mately 16 in. if ordered as Specification A 657 [410 mm if
bility of regulatory limitations prior to use. ordered as SpecificationA 657M]. Coils should be specified to
amaximumcoilweightiforderedasSpecificationA 657[mass
2. Referenced Documents
if ordered as Specification A 657M], or maximum outside
2.1 ASTM Standards:
diameter, or both.
A 623 SpecificationforTinMillProducts,GeneralRequire- 3.1.10 Packaging,
2
ments
3.1.11 Special requirements where applicable, and,
A 623M Specification for Tin Mill Products General Re- 3.1.12 ASTM specification designation and year of issue.
2
quirements [Metric]
NOTE 1—A typical ordering description for coils is as follows: 1250
A 700 Practices for Packaging, Marking, and Loading
base boxes, single reduced, black plate electrolytic chromium coated,
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Methods for Steel Products for Domestic Shipment 3
DOS, (0.0093 in.) MR,T-3 BA, 35 ⁄8 in. by coil, 16 in. inside diameter, 59
D 1125 Test Methods for Electrical Conductivity and Re-
in. maximum outside diameter, 25 000 lb maximum coil weight, for
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sistivity of Water regular crowns in accordance with Specification A 657/A 657M - XX.
[250Sitas,singlereduced,blackplateelectrolyticchromiumcoated,DOS,
0.235 mm thickness, MR, T-3 BA, 513, 900 mm by coil, 410 mm inside
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This specification is under the jurisdiction of ASTM Committee A01 on Steel,
diameter, 1500 mm maximum outside diameter, 11 500 kg maximum coil
Stainless Steel, and RelatedAlloys and is the direct responsibility of Subcommittee
massforregularcrownsinaccordancewithSpecificationA 657/A 657M -
A01.20 on Tin Mill Products.
XX].
Current edition approved September 10, 2003. Published November 2003.
Originally approved in 1972. Last previous edition approved in 1998 as A 657/
NOTE 2—Atypical ordering description of cut sizes is as follows: 1000
A 657M – 98a.
2 base boxes, double reduced black plated electrolytic chromium coated,
Annual Book of ASTM Standards, Vol 01.06.
3 BSC, 0.0061 in., MR, DR CA 8, 31 by 32 in., for cap closures in
Annual Book of ASTM Standards, Vol 01.05.
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accordance with Specification A 657/A 657M - XX. [200 SITAS, double
Annual Book of ASTM Standards, Vol 11.01.
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A 657/A 657M – 03
reduced, black plate electrolytic chromium coated, DOS, 0.155 mm
4.2.2 Cut Lengths—
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