ASTM A657/A657M-98a

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Designation: A 657/A 657M – 98a
AMERICAN SOCIETY FOR TESTING AND MATERIALS
100 Barr Harbor Dr., West Conshohocken, PA 19428
Reprinted from the Annual Book of ASTM Standards. Copyright ASTM
Standard Specification for
Tin Mill Products, Black Plate Electrolytic Chromium-
1
Coated, Single and Double Reduced
This standard is issued under the fixed designation A 657/A 657M; 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 adequately describe the desired product:
3.1.1 Name of product (include whether single- or double-
1.1 This specification covers single- and double-reduced tin
reduced),
mill black plate electrolytically coated with chromium and
3.1.2 Thickness (must be consistent with intended applica-
chromium oxide. The steel is furnished in coils and cut lengths
tion),
for use in the manufacture of cans, closures, crowns, and other
3.1.3 Oiling (Section 6),
products.
3.1.4 Steel type (MR, L, etc.),
1.2 This specification is applicable to orders in either
3.1.5 Temper designation (T-3, T-4, etc. for single-reduced)
inch-pound units (as A 657) which is supplied in thicknesses
or mechanical designation (DR-8, DR-9, etc., double-reduced),
from 0.0050 to 0.0149 in. or in SI units [as A 657M] which is
3.1.6 Surface finish (7B, 7C, etc.).
supplied in thicknesses from 0.13 to 0.38 mm.
3.1.7 Coil width or cut size,
1.3 The values stated in either inch-pound or SI units are to
3.1.8 Rolling direction must be specified on cut sizes and
be regarded as standard. Within the text, the SI units are shown
should be indicated by underlining the slit (rolling width)
in brackets. The values stated in each system are not exact
dimension,
equivalents. Therefore, each system must be used indepen-
3.1.9 On coils, specify minimum or range of acceptable
dently of the other. Combining values from the two systems
inside diameters. The standard inside diameter is approxi-
may result in nonconformance with this specification.
mately 16 in. if ordered as Specification A 657 [410 mm if
1.4 This standard does not purport to address all of the
ordered as Specification A 657M]. Coils should be specified to
safety concerns, if any, associated with its use. It is the
a maximum coil weight if ordered as Specification A 657 [mass
responsibility of the user of this standard to establish appro-
if ordered as Specification A 657M], or maximum outside
priate safety and health practices and determine the applica-
diameter, or both.
bility of regulatory limitations prior to use.
3.1.10 Packaging,
2. Referenced Documents 3.1.11 Special requirements where applicable, and,
3.1.12 ASTM specification designation and year of issue.
2.1 ASTM Standards:
A 623 Specification for Tin Mill Products, General Require-
NOTE 1—A typical ordering description for coils is as follows: 1250
2
ments
base boxes, single reduced, black plate electrolytic chromium coated,
6
DOS, (0.0093 in.) MR, T-3, 58, 35 ⁄16 in. by coil, 16 in. inside diameter,
A 623M Specification for Tin Mill Products General Re-
2
59 in. maximum outside diameter, 25 000 lb maximum coil weight, for
quirements (Metric)
regular crowns in accordance with Specification A 657. [250 Sitas, single
A 700 Practices for Packaging, Marking, and Loading
reduced, black plate electrolytic chromium coated, DOS, 0.235 mm
3
Methods for Steel Products for Domestic Shipment
thickness, MR, T-3, 513, 900 mm by coil, 410 mm inside diameter, 1500
D 1125 Test Methods for Electrical Conductivity and Re-
mm maximum outside diameter, 11 500 kg maximum coil mass for regular
4
sistivity of Water
crowns in accordance with Specification A 657M].
3. Ordering Information
NOTE 2—A typical ordering description of cut sizes is as follows: 1000
base boxes, double reduced black plated electrolytic chromium coated,
3.1 Orders for product under this specification shall include
BSC, 0.0061 in., MR, DR 8, 31 by 32 in., for cap closures in accordance
the following information, as required and applicable, to
with Specification A 657. [200 SITAS, double reduced, black plate
electrolytic chromium coated, DOS, 0.155 mm thickness, MR, DR8, 788
by 813 mm, cap closures in accordance with Specification A 657M].
1
This specification is under the jurisdiction of ASTM Committee A-1 on Steel,
Stainless Steel, and Related Alloys and is the direct responsibility of Subcommittee
NOTE 3—The production of coils does not afford the same opportunity
A01.20 on Tin Mill Products.
for inspection, grading, and sorting as does the production of cut sizes.
Current edition approved Nov. 10, 1998. Published March 1999. Originally
published as A 657 – 72. Last previous editi
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