ASTM A623M-00

NOTICE: This standard has either been superseded and replaced by a new version or discontinued.
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Designation: A 623M – 00
METRIC
Standard Specification for
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Tin Mill Products, General Requirements [Metric]
This standard is issued under the fixed designation A 623M; 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.
This standard has been approved for use by agencies of the Department of Defense.
INTRODUCTION
This specification is the metric counterpart of Specification A 623. It is not intended to replace
A 623. Users of the standard should note several very significant differences in how the product is
produced and marketed.
(1) The metric product does not carry the overrun associated with tin mill products produced to
customary units. Metric tin mill products are produced to ordered size.
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(2) The metric product is designated in units of 100 m called a SITA (System International Tinplate
Area), rather than in base boxes.
(3) The metric product is designated by thickness in millimetres rather than by basis weight.
(4) Coating weights are given in grams per square metre, not pounds per base box.
(5) Thickness tolerances are given in absolute figures instead of a6 percentage.
(6) Each package of metric tin mill products contains 100 sheets, not the 112 of customary unit
packages.
All of the above significant differences, as well as others of lesser consequence, should be
considered when switching from Specification A 623 to A 623M.
1. Scope A 700 Practices for Packaging, Marking, and Loading
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Methods for Steel Products for Domestic Shipment
1.1 This specification covers a group of common require-
E 18 Test Methods for Rockwell Hardness and Rockwell
ments which, unless otherwise specified in the purchase order
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Superficial Hardness of Metallic Materials
or in an individual specification, shall apply to tin mill
E 112 Test Methods for Determining the Average Grain
products.
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Size
1.2 The following safety hazards caveat pertains to Annex
2.2 Military Standards:
A1 through Annex A8 of this specification: This standard does
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MIL-STD-129 Marking for Shipment and Storage
not purport to address all of the safety concerns, if any,
MIL-STD-163 Steel Mill Products, Preparation for Marking
associated with its use. It is the responsibility of the user of this
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and Storage
standard to establish appropriate safety and health practices
2.3 Federal Standard:
and determine the applicability of regulatory limitations prior
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Fed. Std. No. 123 Marking for Shipment (Civil Agencies)
to use.
NOTE 1—This metric specification is equivalent to Specification A 623 3. Terminology
and is compatible in technical content.
3.1 Definitions:
3.1.1 black plate, n—light-gage, low-carbon, cold-reduced
2. Referenced Documents
steel intended for use in the untinned state or for the production
2.1 ASTM Standards:
of other tin mill products. It is supplied only in a dry or oiled
A 370 Test Methods and Definitions for Mechanical Testing
condition.
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of Steel Products
3.1.2 box annealing, n—a process involving slow heating of
coils to a subcritical temperature, holding, and cooling there-
from, to recrystallize the grain, and thus, relieve stresses
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This specification is under the jurisdiction of ASTM Committee A01 on Steel,
Stainless Steel, and Related Alloys and is the direct responsibility of Subcommittee
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A01.20 on Tin Mill Products. Annual Book of ASTM Standards, Vol 01.05.
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Current edition approved Sept. 10, 2000. Published November 2000. Originally Annual Book of ASTM Standards, Vol 03.01.
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published as A 623M – 78. Last previous edition A 623M – 99. Available from Standardization Documents Order Desk, Bldg. 4 Section D, 700
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Annual Book of ASTM Standards, Vol 01.03. Robbins Ave., Philadelphia, PA 19111-5094, Attn: NPODS.
Copyright © ASTM, 100 Barr Harbor Drive, West Conshohocken, PA 19428-2959, United States.
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A 623M
produced during cold reduction. It is accomplished in a sealed ization Test (AMP) (see Annex A8).
container. By introducing and maintaining an inert or slightly
Special Properties Aims
Pickle Lag 10 s max
reducing atmosphere during the cycle, a relatively bright
Iron Solution Value 20 μg iron max
surface is obtained.
Tin Crystal Size ASTM No. 9 or larger
A 2
3.1.3 bright finish, n—a surface that has a lustrous appear- Alloy Tin Couple 0.12 μA/cm max
ance.
A 2
Good mill practice has demonstrated the ability to average 0.05 μA/cm or less
3.1.4 burr, n—metal displaced beyond the plane of the
over an extended period of production.
surface by slitting or shearing (see 9.1.6 and 9.2.6).
3.1.5 camber, n—the greatest deviation of an edge from a
3.1.15.3 Discussion—The pr
...