ASTM A624/A624M-03(2008)e1
(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 A 624) which is supplied in nominal thicknesses from 0.0061 to 0.0149 in. or SI units [as A 624M] 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 and health practices and determine the applicability of regulatory limitations prior to use.
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´1
Designation:A624/A624M −03(Reapproved 2008)
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 Department of Defense.
´ NOTE—Editorially changed 4.1.2 in October 2008.
1. Scope* A630 Test Methods for Determination of Tin Coating
Weights for Electrolytic Tin Plate
1.1 This specification covers single-reduced electrolytic tin
A754/A754M Test Method for Coating Weight (Mass) of
plate produced from low-carbon cold-reduced steel furnished
Metallic Coatings on Steel by X-Ray Fluorescence
in coils and cut sizes for use in the manufacture of cans,
B339 Specification for Pig Tin
closures, crowns, and other products. It is furnished in com-
mercially available tin coating weights [masses], and is nor-
3. Ordering Information
mally supplied with a trimmed edge.
3.1 Orders for product under this specification shall include
1.2 This specification is applicable to orders in either
the following information, as required and applicable, to
inch-pound units (as A624) which is supplied in nominal
describe adequately the desired product:
thicknesses from 0.0061 to 0.0149 in. or SI units [as A624M]
3.1.1 Name of product (single-reduced electrolytic tin plate)
which is supplied in nominal thicknesses from 0.155 to 0.378
(Section 1),
mm.
3.1.2 Tin coating weight [mass] designation and marking, if
1.3 The values stated in either inch-pound or SI units are to
any (Section 4, Table 1, and Fig. 1 and Fig. 2),
be regarded as standard.Within the text, the SI units are shown
3.1.3 Surface appearance and finish (Section 5),
in brackets. The values stated in each system are not exact
3.1.4 Chemical treatment (Section 6),
equivalents. Therefore, each system must be used indepen-
3.1.5 Oiling (Section 7),
dently of the other. Combining values from the two systems
3.1.6 Thickness (Specification A623 [A623M]) (this must
may result in nonconformance with this specification.
be consistent with the intended application),
3.1.7 Coilwidthorcutsizeinincrementsof ⁄16in.or1mm,
1.4 This standard does not purport to address all of the
3.1.8 Where required, rolling direction will be specified on
safety concerns, if any, associated with its use. It is the
cut sizes and will be indicated by underlining the slit (rolling
responsibility of the user of this standard to establish appro-
width) dimension,
priate safety and health practices and determine the applica-
3.1.9 Steel type (Specification A623 [A623M]),
bility of regulatory limitations prior to use.
3.1.10 Temper designation (Specification A623 [A623M])
2. Referenced Documents
(this must be consistent with the intended application),
2 3.1.11 Intended application,
2.1 ASTM Standards:
3.1.12 Quantity in base boxes (SITAS) (see Note 4),
A623 Specification for Tin Mill Products, General Require-
3.1.13 On coils, specify minimum or range of acceptable
ments
inside diameters. The standard inside diameter is approxi-
A623M Specification for Tin Mill Products, General Re-
mately 16 in. if ordered as A624 [410 mm if ordered as
quirements [Metric]
A624M]. Coils should be specified to a maximum coil weight
if ordered as A624 [mass if ordered as A624M], or maximum
This specification is under the jurisdiction of ASTM Committee A01 on Steel, outside diameter or both,
Stainless Steel and Related Alloysand is the direct responsibility of Subcommittee
3.1.14 Packaging,
A01.20 on Tin Mill Products.
3.1.15 Specialrequirementswhereapplicable,J=plateorK
Current edition approved Oct. 1, 2008. Published October 2008. Originally
= plate, and
approved in 1968. Last previous edition approved in 2008 as A624/A624M - 03.
DOI: 10.1520/A0624_A0624M-03R08E01.
3.1.16 ASTM specification designation and year of issue.
For referenced ASTM standards, visit the ASTM website, www.astm.org, or
NOTE 1—A typical ordering description for coils is as follows: 1250
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 base boxes, single reduced, electrolytic tin plate, No. 20, DOS, L,T-5 CA,
the ASTM website. 7C, 0.0088 in. thickness 31 ⁄4 in. by coil, 16 in. inside diameter, 65 in.
*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
´1
A624/A624M−03 (2008)
TABLE 1 Electrolytic Tin Plate Coating Weight [Mass]
4.1.1 Electrolytic tin plate is commonly produced to the
class designations shown in Table 1. Other combinations of
NOTE 1—Listed below are commonly produced coating weights
coatings may be specified by agreement between the producer
[masses]. By agreement between the producer and the purchaser, other
combinations of the coatings may be specified and the appropriate
and the purchaser.
minimum average test values will apply.
4.1.2 Differentially coated tin plate is a product having one
Nominal Tin Coating Minimum Average
surface more heavily tin coated than the opposite. The class
Weight [Mass] each Sur- Coating Weight [Mass]
2 designation is expressed by showing the two tin coating
Designation No.
face, lb/base box [g/m ] each Surface Test
A
Value, lb/base box
weights [masses] separated by a slash mark, for example,
[g/m ]
D50/25 [D5.6/2.8]. The first number will represent the coating
B
5 [0.6/0.6] 0.025/0.025 [0.6/0.6] 0.02/0.02 [0.5/0.5]
weight[mass]ontheoutsideofthecoilorthetopsurfaceofthe
10 [1.1/1.1] 0.05/0.05 [1.1/1.1] 0.04/0.04 [0.9/0.9]
cut sizes. Other line marking conventions must be brought to
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]
the attention of the supplier at the time of order entry.
25 [2.8/2.8] 0.125/0.125 [2.8/2.8] 0.11/0.11 [2.5/2.5]
4.1.3 In order to distinguish material having differential
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]
coatings, the face with the heavier coating is normally marked.
75 [8.4/8.4] 0.375/0.375 [8.4/8.4] 0.35/0.35 [7.8/7.8]
By arrangement, a special marking can be supplied on the
100 [11.2/11.2] 0.50/0.50 [11.2/11.2] 0.45/0.45 [10.1/10.1]
C
light-coated face (see Fig. 1 and Fig. 2). The letter D is shown
D 50/25 [D 5.6/2.8] 0.25/0.125 [5.6/2.8] 0.23/0.11 [5.2/2.5]
D 75/25 [D 8.4/2.8] 0.375/0.125 [8.4/2.8] 0.35/0.11 [7.8/2.5]
along with the coating number to indicate the side of the plate
D100/25 [D 11.2/2.8] 0.50/0.125 [11.2/2.8] 0.45/0.11 [10.1/2.5]
to be marked.
D100/50 [D 11.2/5.6] 0.50/0.25 [11.2/5.6] 0.45/0.23 [10.1/5.2]
D135/25 [D 15.2/2.8] 0.675/0.125 [15.2/2.8] 0.62/0.11 [14.0/2.5]
4.2 Sampling for Tin Coating Weights [Masses]:
A
The minimum spot value shall be not less than 80 % of the minimum average
4.2.1 When the purchaser wishes to make tests to ascertain
coating weight [mass] (see 4.3 and 4.4).
B
compliance with the requirements of this specification for tin
Some No. 5 melted applications may require revised minimum and maximum
levels for fully alloyed end uses.
coating weight [mass] on a lot of any specific item of
C
The letter D on differentially coated tin plate indicates the coated surface to be
electrolytic tin plate, the following procedure shall be used:
marked. For example, the examples indicate that the heavy-coated side is marked
(see 4.1.2 and 4.1.3). 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
maximum outside diameter, 25 000 lbs maximum coil weight, for 300
sampled. A minimum of three randomly selected test strips
diameter sanitary open top ends in accordance with Specification A624/
shall represent the lot.
A624M - XX. [250 SITAS, single reduced electrolytic tin plate, 2.2/2.2,
4.2.1.3 Cut Sizes—One sheet shall be taken at random from
DOS, 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
each 50 packages, or part thereof, with a minimum of three
mass, for 73-mm diameter sanitary open top ends in accordance with
different sample plates, each taken from different bundles from
Specification A624/A624M - XX.]
any one item of a specific shipment.
NOTE 2—Atypical ordering description for cut sizes is as follows: 500
4.2.2 Each test sheet shall be spot tested at a minimum of
base boxes, single reduced electrolytic tin plate, No. 25, DOS, MR,
3 7
T-2BA, 7C, 0.0110 in. thick
...
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.
´1
Designation:A 624/A 624M–98 Designation: A 624/A 624M – 03 (Reapproved 2008)
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.
Asuperscript epsilon (´) indicates an editorial change since the last revision or reapproval. This standard has been approved for use by
agencies of the Department of Defense.
This standard has been approved for use by agencies of the Department of Defense.
´ NOTE—Editorially changed 4.1.2 in October 2008.
1. 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 Thisspecificationisapplicabletoordersineitherinch-poundunits(asA624)whichissuppliedinnominalthicknessesfrom
0.0061 to 0.0149 in. or SI units [as A 624M] 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 w. Within the text, the SI units are shown
in parentheses.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 and health practices and determine the applicability of regulatory
limitations prior to use.
2. Referenced Documents
2.1 ASTM Standards:
A 623 Specification for Tin Mill Products, General Requirements
A 623M Specification for Tin Mill Products, General Requirements (Metric) [Metric]
A 630 Test Methods for Determination of Tin Coating Weights for Hot-Dip and Electrolytic Tin Plate
A754Test Method for Coating Thickness by X-Ray Fluorescence 754/A 754M Test Method for Coating Weight (Mass) of
Metallic Coatings on Steel by X-Ray Fluorescence
B 339 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 Fig. 1 and Fig. 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 A 623 [A 623M]) (this must be consistent with the intended application),
3.1.7Coil width or cut size,
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,
3.1.9 Steel type (Specification A 623 [A 623M]),
This specification is under the jurisdiction of ASTM Committee A-1A01 on Steel, Stainless Steel and Related Alloys and is the direct responsibility of Subcommittee
A01.20 on Tin Mill Products.
Current edition approved Nov. 10, 1998.Oct. 1, 2008. Published March 1999.October 2008. Originally published as A624–68.approved in 1968. Last previous edition
A624–95.approved in 2008 as A 624/A 624M - 03.
For referencedASTM standards, visit theASTM website, www.astm.org, or contactASTM Customer Service at service@astm.org. For Annual Book ofASTM Standards
, Vol 01.06.volume information, refer to the standard’s Document Summary page on the ASTM website.
*ASummary 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.
´1
A 624/A 624M – 03 (2008)
TABLE 1 Electrolytic Tin Plate Coating Weight [Mass]
NOTE 1—Listed below are commonly produced coating weights
[masses]. By agreement between the producer and the purchaser, other
combinations of the coatings may be specified and the appropriate
minimum average test values will apply.
Nominal Tin Coating Minimum Average
Weight [Mass] each Sur- Coating Weight [Mass]
Designation No. face, lb/base box [g/m ] each Surface Test
A
Value, lb/base box
[g/m ]
B
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]
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]
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]
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]
D 75/25 [D 8.4/2.8] 0.375/0.125 [8.4/2.8] 0.35/0.11 [7.8/2.5]
D 100/25 [D 11.2/2.8] 0.50/0.125 [11.2/2.8] 0.45/0.11 [10.1/2.5]
D 100/50 [D 11.2/5.6] 0.50/0.25 [11.2/5.6] 0.45/0.23 [10.1/5.2]
D 135/25 [D 15.2/2.8] 0.675/0.125 [15.2/2.8] 0.62/0.11 [14.0/2.5]
A
The minimum spot value shall be not less than 80 % of the minimum average
coating weight [mass] (see 4.3 and 4.4).
B
Some No. 5 melted applications may require revised minimum and maximum
levels for fully alloyed end uses.
C
The letter D on differentially coated tin plate indicates the coated surface to be
marked. For example, the examples indicate that the heavy-coated side is marked
(see 4.1.2 and 4.1.3).
3.1.10 Temper designation (Specification A 623 [A 623M]) (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 A 624 [410 mm if ordered as A 624M]. Coils should be specified to a maximum coil weight if ordered as A 624
[mass if ordered as A 624M], 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, DOS, L, T-5 CA, 7C,
0.0088in.thickness31 ⁄4in.bycoil,16in.insidediameter,65in.maximumoutsidediameter,25 000lbsmaximumcoilweight,for300diametersanitary
open top ends in accordance with Specification A 624/A 624M - XX. [250 SITAS, single reduced electrolytic tin plate, 2.2/2.2, DOS, 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 A 624/A 624M - XX.]
NOTE 2—A typical ordering description for cut sizes is as follows: 500 base boxes, single reduced electrolytic tin plate, No. 25, DOS, MR, T-2BA,
3 7
7C, 0.0110 in. thickness, 30 ⁄4in. by 30 ⁄16 in., for 307 diameter general line rings in accordance with Specification A 624/A 624M - XX. [100 SITAS,
singlereducedelectrolytictinplate,2.8/2.8,DOS,MR,T-2,7C,0.28mmthickness,781by773mm,for83-mmdiametergenerallineringsinaccordance
with Specification A 624/A 624M - 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 specifi
...
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