ASTM A626/A626M-03(2008)e1
(Specification)Standard Specification for Tin Mill Products, Electrolytic Tin Plate, Double Reduced
Standard Specification for Tin Mill Products, Electrolytic Tin Plate, Double Reduced
ABSTRACT
This specification covers double-reduced electrolytic tin plate produced from low-carbon cold-reduced steel furnished in coils and cut sizes for use predominately in the manufacture of cans. Double-reduced plate is relatively brittle and has very distinct directional properties. The rolling direction shall be specified on cut sizes and will be indicated by underlining the slit (rolling width) dimension. In sampling for tin coating weights [masses], the following procedure shall be used: a test strip shall be taken at random from a representative section of each coil across its width; from one or two coil lots, each coil shall be sampled; and a sheet shall be taken at random from each packages, each taken from different bundles from any one item of a specific shipment. X-ray fluorescence method shall be performed to determine the tin coating weight. Surface appearance shall be bright or matte depending on coating processes and the base metal finish shall have a smooth finish with grit lines. Chemical treatments for tin plate shall be cathodic sodium dichromate (CDC) treatment or sodium dichromate dip (SDCD/SDD) treatment. Electrolytic tin plate is furnished with an oil film applied to both surfaces.
SCOPE
1.1 This specification covers double-reduced electrolytic tin plate produced from low-carbon cold-reduced steel furnished in coils and cut sizes for use predominately in the manufacture of cans. 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 626) which is supplied in thicknesses from 0.0050 to 0.0118 in. or SI units [as A 626M] which is supplied in thicknesses from 0.127 to 0.300 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: A626/A626M −03(Reapproved 2008)
Standard Specification for
Tin Mill Products, Electrolytic Tin Plate, Double Reduced
This standard is issued under the fixed designationA626/A626M; 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 and 5.1.2 in October 2008.
1. Scope* Weights for Electrolytic Tin Plate
A754/A754M Test Method for Coating Weight (Mass) of
1.1 This specification covers double-reduced electrolytic tin
Metallic Coatings on Steel by X-Ray Fluorescence
plate produced from low-carbon cold-reduced steel furnished
B339 Specification for Pig Tin
in coils and cut sizes for use predominately in the manufacture
of cans. It is furnished in commercially available tin coating
3. Ordering Information
weights [masses] and is normally supplied with a trimmed
edge.
3.1 Orders for product under this specification shall include
the following information, as required and applicable, to
1.2 This specification is applicable to orders in either
describe adequately the desired product:
inch-pound units (as A626) which is supplied in thicknesses
3.1.1 Name of product (double-reduced electrolytic tin
from 0.0050 to 0.0118 in. or SI units [as A626M] which is
plate) (Section 1),
supplied in thicknesses from 0.127 to 0.300 mm.
3.1.2 Tincoatingweight[mass]designation,andmarking,if
1.3 The values stated in either inch-pound or SI units are to
any (Section 5, 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 6),
in brackets. The values stated in each system are not exact
3.1.4 Chemical treatment (Section 7),
equivalents. Therefore, each system must be used indepen-
dently of the other. Combining values from the two systems 3.1.5 Oiling (Section 8),
may result in nonconformance with this specification.
3.1.6 Thickness (Specification A623 [A623M]) (consistent
with the intended application),
1.4 This standard does not purport to address all of the
safety concerns, if any, associated with its use. It is the
3.1.7 Coilwidthorcutsizeinincrementsof ⁄16in.or1mm,
responsibility of the user of this standard to establish appro-
3.1.8 Due to the very distinct directional properties, rolling
priate safety and health practices and determine the applica-
direction must be specified on cut sizes by underlining the slit
bility of regulatory limitations prior to use.
(rolling width) dimension (Section 4) (consistent with the
intended application),
2. Referenced Documents
3.1.9 Steel type (Specification A623 [A623M]),
2.1 ASTM Standards:
3.1.10 Mechanical requirement designation (Specification
A623 Specification for Tin Mill Products, General Require-
A623 [A623M]) (consistent with the intended application),
ments
3.1.11 Intended application,
A623M Specification for Tin Mill Products, General Re-
3.1.12 Quantity in base boxes SITAS (see Note 4),
quirements [Metric]
3.1.13 On coils, specify minimum or range of acceptable
A630 Test Methods for Determination of Tin Coating
inside diameters. The standard inside diameter is approxi-
mately 16 in. if ordered to Specification A626 [410 mm if
ordered to Specification A626M]. Coils should be specified to
This specification is under the jurisdiction of ASTM Committee A01 on Steel,
a maximum coil weight if ordered to Specification A626 [mass
Stainless Steel and Related Alloysand is the direct responsibility of Subcommittee
A01.20 on Tin Mill Products.
if ordered to Specification A626M] or maximum outside
Current edition approved Oct. 1, 2008. Published October 2008. Originally
diameter, or both,
approved in 1968. Last previous edition approved in 2003 as A626/A626M - 03.
3.1.14 Packaging,
DOI: 10.1520/A0626_A0626M-03R08E01.
For referenced ASTM standards, visit the ASTM website, www.astm.org, or
3.1.15 Special requirements, where applicable (J = plate or
contact ASTM Customer Service at service@astm.org. For Annual Book of ASTM
K = plate), and
Standards volume information, refer to the standard’s Document Summary page on
the ASTM website. 3.1.16 ASTM specification number 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
´1
A626/A626M − 03 (2008)
TABLE 1 Electrolytic Tin Plate Coating Weight [Mass]
sion.To minimize the flange-cracking hazard when the product
is used for can bodies, the rolling direction must be around the
NOTE 1—Listed as follows are commonly produced coating weights
circumference of the can.
[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.
5. Tin Coating Weight [Mass]
Minimum Average Coating
Nominal Tin Coating
5.1 Class Designation and Marking:
Weight [Mass] each Sur-
Designation No. Weight [Mass] each Sur-
face Test Value, lb/base
5.1.1 Electrolytic tin plate is commonly produced to the
face, lb/base box [g/m ]
A 2
box [g/m ]
class designations shown in Table 1. Other combinations of
B
5 [0.6/0.6] 0.025/0.025 [0.6/0.6] 0.02/0.02 [0.5/0.5]
coatings may be specified by agreement between the producer
10 [1.1/1.1] 0.05/0.05 [1.1/1.1] 0.04/0.04 [0.9/0.9]
and the purchaser.
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]
5.1.2 Differentially coated tin plate is a product having one
25 [2.8/2.8] 0.125/0.125 [2.8/2.8] 0.11/0.11 [2.5/2.5]
surface more heavily tin coated than the opposite. The class
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] designation is expressed by showing the two tin coating
75 [8.4/8.4] 0.375/0.375 [8.4/8.4] 0.35/0.35 [7.8/7.8]
weights[masses]separatedbyaslashmark,forexample,50/25
100 [11.2/11.2] 0.50/0.50 [11.2/11.2] 0.45/0.45 [10.1/10.1]
C [D 5.6/2.8]. The first number will represent the coating weight
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] [mass] on the outside of the coil or the top surface of the cut
D100/25 [D 11.2/2.8] 0.50/0.125 [11.2/2.8] 0.45/0.11 [10.1/2.5]
sizes. Other line marking conventions must be brought to the
D100/50 [D 11.2/5.6] 0.50/0.25 [11.2/5.6] 0.45/0.23 [10.1/5.2]
attention of the supplier at the time of order entry.
D135/25 [D 15.2/2.8] 0.675/0.125 [15.2/2.8] 0.62/0.11 [14.0/2.5]
5.1.3 In order to distinguish material having differential
A
The minimum spot value shall be not less than 80 % of the minimum average
coating weight [mass] (see 5.3 and 5.4). coatings, the face with the heavier coating is normally marked.
B
Some No. 5 melted applications may require revised minimum and maximum
By arrangement, a special marking can be supplied on the
levels for fully alloyed end uses.
C light-coated face (see Fig. 1 and Fig. 2). The letter D is shown
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 along with the coating number to indicate the side of the plate
(see 5.1.2 and 5.1.3).
to be marked.
5.2 Sampling for Tin Coating Weights [Masses]:
5.2.1 When the purchaser wishes to make tests to ascertain
NOTE 1—Atypical ordering description is as follows: 1000 base boxes,
compliance with the requirements of this specification for tin
double-reducedelectrolytictinplate,D50/25,melted,CDC,DOS,0.0066-
in.thickness,30bycoil,MR,DR-8CA,for307by401weldedcanbodies
coating weight [mass] on a lot of any specific item of
in accordance with Specification A626/A626M - XX. [250 SITAS,
electrolytic tin plate, the following procedure shall be used:
double-reduced electrolytic tin plate, D 5.6/2.8, melted, CDC, DOS,
5.2.1.1 Coils—One test strip shall be taken at random from
0.17-mmthickness,760bycoil,MR,DR-8,for99by105mmweldedcan
a representative section of each coil across its width. A
bodies to Specification A626/A626M - XX.]
NOTE 2—Atypical ordering description for cut sizes is as follows: 500 minimum of three test strips, each taken from different coils
base boxes, single reduced electrolytic tin plate, No. 25, DOS, MR, T-2
from any one item of a specific lot shall be selected.
3 7
BA, 7C, 0.0110 in. thickness, 30 ⁄4 in. by 30 ⁄16 in., for 307 diameter
5.2.1.2 From one or two coil lots, each coil should be
general line rings in accordance with Specification A626/A626M-XX.
sampled. A
...
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:A626/A626M–98 Designation: A 626/A 626M – 03 (Reapproved 2008)
Standard Specification for
Tin Mill Products, Electrolytic Tin Plate, Double Reduced
This standard is issued under the fixed designationA 626/A 626M; 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 and 5.1.2 in October 2008.
1. Scope*
1.1 This specification covers double-reduced electrolytic tin plate produced from low-carbon cold-reduced steel furnished in
coils and cut sizes for use predominately in the manufacture of cans. 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 (asA 626) which is supplied in thicknesses from 0.0050
to 0.0118 in. or SI units [as A 626M] which is supplied in thicknesses from 0.130.127 to 0.300 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.
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]
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 (double-reduced electrolytic tin plate) (Section 1),
3.1.2 Tin coating weight [mass] designation, and marking, if any (Section 5, Table 1, and Fig. 1 and Fig. 2),
3.1.3 Surface appearance and finish (Section 6),
3.1.4 Chemical treatment (Section 7),
3.1.5 Oiling (Section 8),
3.1.6 Thickness (Specification A 623 [A 623M]) (consistent with the intended application),
3.1.7 Coil width or cut size in increments of ⁄16 in. or 1 mm,
3.1.8 Due to the very distinct directional properties, rolling direction must be specified on cut sizes by underlining the slit
(rolling width) dimension (Section 4) (consistent with the intended application),
3.1.9 Steel type (Specification A 623 [A 623M]),
3.1.10 Mechanical requirement designation (Specification A 623 [A 623M]) (consistent with the intended application),
3.1.11 Intended application,
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 A 626–68. approved in 1968. Last previous edition
A 626–95.approved in 2003 as A 626/A 626M - 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 626/A 626M – 03 (2008)
TABLE 1 Electrolytic Tin Plate Coating Weight [Mass]
NOTE 1—Listed as follows 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.
Minimum Average Coating
Nominal Tin Coating
Weight [Mass] each Sur-
Designation No. Weight [Mass] each Sur-
face Test Value, lb/base
face, lb/base box [g/m ]
A 2
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 5.3 and 5.4).
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 5.1.2 and 5.1.3).
3.1.12 Quantity in base boxes SITAS (see Note 3Note 4),
3.1.13 On coils, specify minimum or range of acceptable inside diameters. The standard inside diameter is approximately 16
in. if ordered to Specification A 626 [410 mm if ordered to Specification A 626M]. Coils should be specified to a maximum coil
weight if ordered to Specification A 626 [mass if ordered to Specification A 626M] 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 number and year of issue.
NOTE 1—Atypical ordering description is as follows: 1000 base boxes, double-reduced electrolytic tin plate, D 50/25, melted, CDC, DOS, 0.0066-in.
thickness, 30 by 34 ⁄16 in., coil, MR, DR-8 CA, for 307 3by 401 welded can bodies in accordance with SpecificationA 626/A 626M - XX. [250 SITAS,
double-reduced electrolytic tin plate, D 5.6/2.8, melted, CDC, DOS, 0.17-mm thickness, 760 by 865 mm, coil, MR, DR-8, for 99 3by 105 mm welded
can bodies to Specification A626M]. A 626/A 626M - XX.]
NOTE2—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. 2—Atypical ordering description for cut sizes is as follows: 500 base boxes, single reduced electrolytic tin plate, No. 25, DOS, MR, T-2 BA,
3 7
7C, 0.0110 in. thickness, 30 ⁄4 in. by 30 ⁄16 in., for 307 diameter general line rings in accordance with Specification A 626/A 626M-XX. [100 SITAS,
single reduced electrolytic tin plate, 2.8/2.8, DOS, MR, DR-8 CA, 7C, 0.28 mm thickness, 781 by 773 mm, for 99 by 105 mm welded can bodies to
Specification A 626/A626M-XX.]
NOTE3—In inch-pound units, double-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, double-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 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, double-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, double-reduced electrolytic tin plate is supplied on an
...
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