ASTM A624/A624M-13(2018)
(Specification)Standard Specification for Tin Mill Products, Electrolytic Tin Plate, Single Reduced
Standard Specification for Tin Mill Products, Electrolytic Tin Plate, Single Reduced
ABSTRACT
This specification covers single-reduced electrolytic tin plate produced from low-carbon cold-reduced steel furnished in coils and cut sizes for use in the manufacture of cans, closures, crowns, and other products. The material shall conform to the coating weight [mass] test values. Details on standard heavy marking system for differential electrolytic tin plate shall be described. Standard light side marking system for differential electrolytic tin plate shall also be indicated. Chemical treatments such as cathodic sodium dichromate treatment and sodium dichromate dip treatment shall be applied after the tin coating has been deposited and immediately preceding the oiling, to control tin oxide formation and growth.
SCOPE
1.1 This specification covers single-reduced electrolytic tin plate produced from low-carbon cold-reduced steel furnished in coils and cut sizes for use in the manufacture of cans, closures, crowns, and other products. It is furnished in commercially available tin coating weights [masses], and is normally supplied with a trimmed edge.
1.2 This specification is applicable to orders in either inch-pound units (as A624) which is supplied in nominal thicknesses from 0.0061 to 0.0149 in. or SI units [as A624M] which is supplied in nominal thicknesses from 0.155 to 0.378 mm.
1.3 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.
1.4 This standard does not purport to address all of the safety concerns, if any, associated with its use. It is the responsibility of the user of this standard to establish appropriate safety, health, and environmental practices and determine the applicability of regulatory limitations prior to use.
1.5 This international standard was developed in accordance with internationally recognized principles on standardization established in the Decision on Principles for the Development of International Standards, Guides and Recommendations issued by the World Trade Organization Technical Barriers to Trade (TBT) Committee.
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Designation:A624/A624M −13 (Reapproved 2018)
Standard Specification for
Tin Mill Products, Electrolytic Tin Plate, Single Reduced
This standard is issued under the fixed designationA624/A624M; 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 (´) indicates an editorial change since the last revision or reapproval.
This standard has been approved for use by agencies of the U.S. Department of Defense.
1. Scope A623 Specification for Tin Mill Products, General Require-
ments
1.1 This specification covers single-reduced electrolytic tin
A623M Specification for Tin Mill Products, General Re-
plate produced from low-carbon cold-reduced steel furnished
quirements [Metric]
in coils and cut sizes for use in the manufacture of cans,
A630 Test Methods for Determination of Tin Coating
closures, crowns, and other products. It is furnished in com-
Weights for Electrolytic Tin Plate
mercially available tin coating weights [masses], and is nor-
A754/A754M Test Method for Coating Weight (Mass) of
mally supplied with a trimmed edge.
Metallic Coatings on Steel by X-Ray Fluorescence
1.2 This specification is applicable to orders in either
B339 Specification for Pig Tin
inch-pound units (as A624) which is supplied in nominal
thicknesses from 0.0061 to 0.0149 in. or SI units [as A624M]
3. Ordering Information
which is supplied in nominal thicknesses from 0.155 to 0.378
3.1 Orders for product under this specification shall include
mm.
the following information, as required and applicable, to
1.3 The values stated in either inch-pound or SI units are to
describe adequately the desired product:
be regarded as standard.Within the text, the SI units are shown
3.1.1 Name of product (single-reduced electrolytic tin plate)
in brackets. The values stated in each system are not exact
(Section 1),
equivalents. Therefore, each system must be used indepen-
3.1.2 Tin coating weight [mass] designation and marking, if
dently of the other. Combining values from the two systems
any (Section 4, Table 1, and Figs 1 and 2),
may result in nonconformance with this specification.
3.1.3 Surface appearance and finish (Section 5),
1.4 This standard does not purport to address all of the
3.1.4 Chemical treatment (Section 6),
safety concerns, if any, associated with its use. It is the
3.1.5 Oiling (Section 7),
responsibility of the user of this standard to establish appro-
3.1.6 Thickness (Specification A623 [A623M]) (this must
priate safety, health, and environmental practices and deter-
be consistent with the intended application),
mine the applicability of regulatory limitations prior to use.
3.1.7 Coilwidthorcutsizeinincrementsof ⁄16in.or1mm,
1.5 This international standard was developed in accor-
3.1.8 Where required, rolling direction will be specified on
dance with internationally recognized principles on standard-
cut sizes and will be indicated by underlining the slit (rolling
ization established in the Decision on Principles for the
width) dimension,
Development of International Standards, Guides and Recom-
3.1.9 Steel type (Specification A623 [A623M]),
mendations issued by the World Trade Organization Technical
3.1.10 Temper designation (Specification A623 [A623M])
Barriers to Trade (TBT) Committee.
(this must be consistent with the intended application),
3.1.11 Intended application,
2. Referenced Documents
3.1.12 Quantity in base boxes (SITAs) (see Note 4),
2.1 ASTM Standards:
3.1.13 On coils, specify minimum or range of acceptable
inside diameters. The standard inside diameter is approxi-
mately 16 in. if ordered as A624 [410 mm if ordered as
This specification is under the jurisdiction of ASTM Committee A01 on Steel,
Stainless Steel and Related Alloys and is the direct responsibility of Subcommittee
A624M]. Coils should be specified to a maximum coil weight
A01.20 on Tin Mill Products.
if ordered as A624 [mass if ordered as A624M], or maximum
Current edition approved Sept. 1, 2018. Published September 2018. Originally
outside diameter or both,
approved in 1968. Last previous edition approved in 2013 as A624/A624M – 13.
DOI: 10.1520/A0624_A0624M-13R18.
3.1.14 Packaging,
For referenced ASTM standards, visit the ASTM website, www.astm.org, or
3.1.15 Specialrequirementswhereapplicable,J=plateorK
contact ASTM Customer Service at service@astm.org. For Annual Book of ASTM
= plate, and
Standards volume information, refer to the standard’s Document Summary page on
the ASTM website. 3.1.16 ASTM specification designation and year of issue.
*A Summary of Changes section appears at the end of this standard
Copyright © ASTM International, 100 Barr Harbor Drive, PO Box C700, West Conshohocken, PA 19428-2959. United States
A624/A624M−13 (2018)
NOTE 1—A typical ordering description for coils is as follows: 1250 TABLE 1 Electrolytic Tin Plate Coating Weight [Mass]
base boxes, single reduced, electrolytic tin plate, No. 20, ATBC, L, T-5
NOTE 1—Listed below are commonly produced coating weights
CA, 7C, 0.0088 in. thickness 31 ⁄4 in. by coil, 16 in. inside diameter, 65
[masses]. By agreement between the producer and the purchaser, other
in. maximum outside diameter, 25 000 lbs maximum coil weight, for 300
combinations of the coatings may be specified and the appropriate
diameter sanitary open top ends in accordance with Specification A624/
minimum average test values will apply.
A624M - XX. [250 SITAs, single reduced electrolytic tin plate, 2.2/2.2,
ATBC, L, T-5, 7C, 0.22 mm thickness, 794 mm by coil, 410 mm inside Nominal Tin Coating Minimum Average
Weight [Mass] each Coating Weight [Mass]
diameter, 1650 mm maximum outside diameter, 11 500 kg maximum coil
Designation No.
Surface, lb/base box [g/ each Surface Test
mass, for 73-mm diameter sanitary open top ends in accordance with
2 A
m ] Value, lb/base box
Specification A624/A624M - XX.] 2
[g/m ]
NOTE 2—Atypical ordering description for cut sizes is as follows: 500
B
5 [0.6 ⁄0.6] 0.025/0.025 [0.6 ⁄0.6] 0.02/0.02 [0.5 ⁄0.5]
base boxes, single reduced electrolytic tin plate, No. 25, ATBC, MR,
10 [1.1 ⁄1.1] 0.05/0.05 [1.1/1.1] 0.04/0.04 [0.9/0.9]
3 7
T-2BA, 7C, 0.0110 in. thickness, 30 ⁄4 in. by 30 ⁄16 in., for 307 diameter
15 [1.7 ⁄1.7] 0.075/0.075 [1.7/1.7] 0.06/0.06 [1.4/1.4]
general line rings in accordance with Specification A624/A624M - XX.
20 [2.2 ⁄2.2] 0.10/0.10 [2.2/2.2] 0.08/0.08 [1.8/1.8]
[100 SITAs, single reduced electrolytic tin plate, 2.8/2.8,ATBC, MR, T-2,
25 [2.8 ⁄2.8] 0.125/0.125 [2.8/2.8] 0.11/0.11 [2.5/2.5]
7C, 0.28 mm thickness, 781 by 773 mm, for 83-mm diameter general line 35 [3.9 ⁄3.9] 0.175/0.175 [3.9/3.9] 0.16/0.16 [3.6/3.6]
50 [5.6 ⁄5.6] 0.25/0.25 [5.6/5.6] 0.23/0.23 [5.2/5.2]
rings in accordance with Specification A624/A624M - XX.]
75 [8.4 ⁄8.4] 0.375/0.375 [8.4/8.4] 0.35/0.35 [7.8/7.8]
NOTE 3—The production of coils does not afford the same opportunity
100 [11.2/11.2] 0.50/0.50 [11.2/11.2] 0.45/0.45 [10.1/10.1]
for inspection, grading, and sorting as does the production of cut sizes.
C
D 50/25 [D 5.6 ⁄2.8] 0.25/0.125 [5.6/2.8] 0.23/0.11 [5.2/2.5]
Accordingly, appropriate processing and quality-control procedures are
D 75/25 [D 8.4 ⁄2.8] 0.375/0.125 [8.4/2.8] 0.35/0.11 [7.8/2.5]
required by the purchaser to obtain optimum utilization of the material.
D100/25 [D 11.2 ⁄2.8] 0.50/0.125 [11.2/2.8] 0.45/0.11 [10.1/2.5]
Cut sizes are line inspected visually and mechanically during production.
D100/50 [D 11.2 ⁄5.6] 0.50/0.25 [11.2/5.6] 0.45/0.23 [10.1/5.2]
Sheets having surface imperfections that will not interfere with their
D135/25 [D 15.2 ⁄2.8] 0.675/0.125 [15.2/2.8] 0.62/0.11 [14.0/2.5]
utilization are included.
A
The minimum spot value shall be not less than 80 % of the minimum average
NOTE 4—In inch-pound units, single reduced electrolytic tin plate is
coating weight [mass] (see 4.3 and 4.4).
B
supplied on an area basis expressed in base boxes. In coils the number of
Some No. 5 melted applications may require revised minimum and maximum
levels for fully alloyed end uses.
base boxes is computed from the measured length and the specified width.
C
The letter D on differentially coated tin plate indicates the coated surface to be
In cut sizes the number of base boxes is computed from the specified
marked. For example, the examples indicate that the heavy-coated side is marked
length and width dimensions and sheet count. [In SI units, single-reduced
(see 4.1.2 and 4.1.3).
electrolytic tin plate is supplied on an area basis expressed in SITAs. In
coils, the number of SITAs is computed from the measured length and the
specified width. In cut sizes, the number of SITAs is computed from the
specified length and width dimensions and sheet count]. For calculating
minimum of three test strips, each taken from different coils
mass, the density of steel for tin mill products is 0.2836 lb/in. [7850
from any one item of a specific lot shall be selected.
kg/m ].
4.2.1.2 From one or two coil lots, each coil shall be
sampled. A minimum of three randomly selected test strips
4. Tin Coating Weight [Mass]
shall repres
...
This document is not an ASTM standard and is intended only to provide the user of an ASTM standard an indication of what changes have been made to the previous version. Because
it may not be technically possible to adequately depict all changes accurately, ASTM recommends that users consult prior editions as appropriate. In all cases only the current version
of the standard as published by ASTM is to be considered the official document.
Designation: A624/A624M − 13 A624/A624M − 13 (Reapproved 2018)
Standard Specification for
Tin Mill Products, Electrolytic Tin Plate, Single Reduced
This standard is issued under the fixed designation A624/A624M; 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 (´) indicates an editorial change since the last revision or reapproval.
This standard has been approved for use by agencies of the U.S. Department of Defense.
1. Scope*Scope
1.1 This specification covers single-reduced electrolytic tin plate produced from low-carbon cold-reduced steel furnished in
coils and cut sizes for use in the manufacture of cans, closures, crowns, and other products. It is furnished in commercially
available tin coating weights [masses], and is normally supplied with a trimmed edge.
1.2 This specification is applicable to orders in either inch-pound units (as A624) which is supplied in nominal thicknesses from
0.0061 to 0.0149 in. or SI units [as A624M] which is supplied in nominal thicknesses from 0.155 to 0.378 mm.
1.3 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.
1.4 This standard does not purport to address all of the safety concerns, if any, associated with its use. It is the responsibility
of the user of this standard to establish appropriate safety safety, health, and healthenvironmental practices and determine the
applicability of regulatory limitations prior to use.
1.5 This international standard was developed in accordance with internationally recognized principles on standardization
established in the Decision on Principles for the Development of International Standards, Guides and Recommendations issued
by the World Trade Organization Technical Barriers to Trade (TBT) Committee.
2. Referenced Documents
2.1 ASTM Standards:
A623 Specification for Tin Mill Products, General Requirements
A623M Specification for Tin Mill Products, General Requirements [Metric]
A630 Test Methods for Determination of Tin Coating Weights for Electrolytic Tin Plate
A754/A754M Test Method for Coating Weight (Mass) of Metallic Coatings on Steel by X-Ray Fluorescence
B339 Specification for Pig Tin
3. Ordering Information
3.1 Orders for product under this specification shall include the following information, as required and applicable, to describe
adequately the desired product:
3.1.1 Name of product (single-reduced electrolytic tin plate) (Section 1),
3.1.2 Tin coating weight [mass] designation and marking, if any (Section 4, Table 1, and Figs 1 and 2),
3.1.3 Surface appearance and finish (Section 5),
3.1.4 Chemical treatment (Section 6),
3.1.5 Oiling (Section 7),
3.1.6 Thickness (Specification A623 [A623M]) (this must be consistent with the intended application),
3.1.7 Coil width or cut size in increments of ⁄16 in. or 1 mm,
3.1.8 Where required, rolling direction will be specified on cut sizes and will be indicated by underlining the slit (rolling width)
dimension,
This specification is under the jurisdiction of ASTM Committee A01 on Steel, Stainless Steel and Related Alloys and is the direct responsibility of Subcommittee A01.20
on Tin Mill Products.
Current edition approved Oct. 1, 2013Sept. 1, 2018. Published October 2013September 2018. Originally approved in 1968. Last previous edition approved in 20082013
ε1
as A624/A624M - 08A624/A624M – 13. . DOI: 10.1520/A0624_A0624M-13.10.1520/A0624_A0624M-13R18.
For referenced ASTM standards, visit the ASTM website, www.astm.org, or contact ASTM Customer Service at service@astm.org. For Annual Book of ASTM Standards
volume information, refer to the standard’s Document Summary page on the ASTM website.
*A Summary of Changes section appears at the end of this standard
Copyright © ASTM International, 100 Barr Harbor Drive, PO Box C700, West Conshohocken, PA 19428-2959. United States
A624/A624M − 13 (2018)
3.1.9 Steel type (Specification A623 [A623M]),
3.1.10 Temper designation (Specification A623 [A623M]) (this must be consistent with the intended application),
3.1.11 Intended application,
3.1.12 Quantity in base boxes (SITAs) (see Note 4),
3.1.13 On coils, specify minimum or range of acceptable inside diameters. The standard inside diameter is approximately 16
in. if ordered as A624 [410 mm if ordered as A624M]. Coils should be specified to a maximum coil weight if ordered as A624
[mass if ordered as A624M], or maximum outside diameter or both,
3.1.14 Packaging,
3.1.15 Special requirements where applicable, J = plate or K = plate, and
3.1.16 ASTM specification designation and year of issue.
NOTE 1—A typical ordering description for coils is as follows: 1250 base boxes, single reduced, electrolytic tin plate, No. 20, ATBC, L, T-5 CA, 7C,
0.0088 in. thickness 31 ⁄4 in. by coil, 16 in. inside diameter, 65 in. maximum outside diameter, 25 000 lbs maximum coil weight, for 300 diameter sanitary
open top ends in accordance with Specification A624/A624M - XX. [250 SITAs, single reduced electrolytic tin plate, 2.2/2.2, ATBC, L, T-5, 7C, 0.22
mm thickness, 794 mm by coil, 410 mm inside diameter, 1650 mm maximum outside diameter, 11 500 kg maximum coil mass, for 73-mm diameter
sanitary open top ends in accordance with Specification A624/A624M - XX.]
NOTE 2—A typical ordering description for cut sizes is as follows: 500 base boxes, single reduced electrolytic tin plate, No. 25, ATBC, MR, T-2BA,
3 7
7C, 0.0110 in. thickness, 30 ⁄4 in. by 30 ⁄16 in., for 307 diameter general line rings in accordance with Specification A624/A624M - XX. [100 SITAs,
single reduced electrolytic tin plate, 2.8/2.8, ATBC, MR, T-2, 7C, 0.28 mm thickness, 781 by 773 mm, for 83-mm diameter general line rings in
accordance with Specification A624/A624M - XX.]
NOTE 3—The production of coils does not afford the same opportunity for inspection, grading, and sorting as does the production of cut sizes.
Accordingly, appropriate processing and quality-control procedures are required by the purchaser to obtain optimum utilization of the material. Cut sizes
are line inspected visually and mechanically during production. Sheets having surface imperfections that will not interfere with their utilization are
included.
NOTE 4—In inch-pound units, single reduced electrolytic tin plate is supplied on an area basis expressed in base boxes. In coils the number of base
boxes is computed from the measured length and the specified width. In cut sizes the number of base boxes is computed from the specified length and
width dimensions and sheet count. [In SI units, single-reduced electrolytic tin plate is supplied on an area basis expressed in SITAs. In coils, the number
of SITAs is computed from the measured length and the specified width. In cut sizes, the number of SITAs is computed from the specified length and
3 3
width dimensions and sheet count]. For calculating mass, the density of steel for tin mill products is 0.2836 lb/in. [7850 kg/m ].
4. Tin Coating Weight [Mass]
4.1 Class Designations and Marking:
4.1.1 Electrolytic tin plate is commonly produced to the class designations shown in Table 1. Other combinations of coatings
may be specified by agreement between the producer and the purchaser.
4.1.2 Differentially coated tin plate is a product having one surface more heavily tin coated than the opposite. The class
designation is expressed by showing the two tin coating weights [masses] separated by a slash mark, for example, D50/25
[D5.6/2.8]. The first number will represent the coating weight [mass] on the outside of the coil or the top surface of the cut sizes.
Other line marking conventions must be brought to the attention of the supplier at the time of order entry.
4.1.3 In order to distinguish material having differential coatings, the face with the heavier coating is normally marked. By
arrangement, a special marking can be supplied on the light-coated face (see Fig. 1 and Fig. 2). The letter D is shown along with
the coating number to indicate the side of the plate to be marked.
4.2 Sampling for Tin Coating Weights [Masses]:
4.2.1 When the purchaser wishes to make tests to ascertain compliance with the requirements of this specification for tin coating
weight [mass] on a lot of any specific item of electrolytic tin plate, the following procedure shall be used:
4.2.1.1 Coils—One test strip shall be taken at random from a representative section of each coil across its width. A minimum
of three test strips, each taken from different coils from any one item of a specific lot shall be selected.
4.2.1.2 From one or two coil lots, each coil shall be sampled. A minimum of three randomly selected test strips shall represent
the lot.
4.2.1.3 Cut Sizes—One sheet shall be taken at random from each 50 packages, or part thereof, with a minimum of three different
sample plates, each taken from different bundles from any one item of a specific shipment.
4.2.2 Each test sheet shall be spot tested at a minimum of three locations across the rolling direction of the sheet. Spot tests are
2 2
customarily disks or squares 4 in. [26 cm ] in area; other sizes may be used. In order to secure representative samples, the
following procedure shall be used:
4.2.2.1 All test spots are taken on a center line at right angles to the rolling direction.
4.2.2.2 No test spots shall be clos
...
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