ASTM B852-00A
(Specification)Standard Specification for Continuous Galvanizing Grade (CGG) Zinc Alloys for Hot-Dip Galvanizing of Sheet Steel
Standard Specification for Continuous Galvanizing Grade (CGG) Zinc Alloys for Hot-Dip Galvanizing of Sheet Steel
SCOPE
1.1 This specification covers grades of zinc alloys, commonly known as Continuous Galvanizing Grade (CGG) alloys that contain aluminum, or aluminum and lead and that are used in continuous hot-dip galvanizing of steel sheet. The compositions for CGG grades made from primary zinc are shown in Table 1. Exceptions for grades made from secondary zinc are found in footnote C.
1.2 Other alloy compositions not included in B852, and as may be agreed upon between the producer and the user, may be used for continuous galvanizing.
1.3 The values stated in inch-pound units are to be regarded as the standard. The values given in parentheses are for information only.
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 become familiar with all hazards including those identified in the appropriate Material Data Sheet for this product/material as provided by the manufacturer, to establish appropriate safety and health practices, and determine the applicability of regulatory limitations prior to use.
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Designation: B 852 – 00a An American National Standard
Standard Specification for
Zinc Alloys (CGG) for Continuous Hot-Dip Galvanizing of
Sheet Steel
This standard is issued under the fixed designation B 852; 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.
TABLE 1 Chemical Requirements
1. Scope *
Composition,%
1.1 This specification covers grades of zinc alloys, com-
A
Grade
B
Nominal Range
monly known as Continuous Galvanizing Grade (CGG) alloys
(UNS)
C
that contain aluminum, or aluminum and lead and that are used Aluminum Lead Aluminum Lead
in continuous hot-dip galvanizing of steel sheet. The compo-
Z80310 0.25 . 0.22 to 0.28 0.007 max
Z80411 0.35 . 0.31 to 0.39 0.007 max
sitions for CGG grades made from primary zinc are shown in
Z80511 0.45 . 0.40 to 0.50 0.007 max
Table 1. Exceptions for grades made from secondary zinc are
Z80531 0.45 0.02 0.40 to 0.50 0.01 to 0.03
found in footnote C.
Z80610 0.55 . 0.49 to 0.61 0.007 max
Z80710 0.65 . 0.58 to 0.72 0.007 max
1.2 Other alloy compositions not included in B 852, and as
Z80810 0.75 . 0.67 to 0.83 0.007 max
may be agreed upon between the producer and the user, may be
Z80910 1.00 . 0.90 to 1.10 0.007 max
used for continuous galvanizing.
C
Impurities, %: Iron 0.0075 max
1.3 The values stated in inch-pound units are to be regarded
Cadmium 0.01 max
as the standard. The values given in parentheses are for
Copper 0.01 max
information only.
Other Elements total of 0.01 max
Zinc: balance by difference
1.4 This standard does not purport to address all of the
A
safety concerns, if any, associated with its use. It is the UNS numbers in conformance with Practice E 527.
B
For purposes of determining conformance with this specification, an observed
responsibility of the user of this standard to become familiar
value obtained from analysis shall be rounded to the nearest unit in the last
with all hazards including those identified in the appropriate
right-hand place of figures used in expressing the limiting value, in accordance
with the rounding method of Practice E 29.
Material Data Sheet for this product/material as provided by
C
Lead and Iron levels of 0.01 % max and 0.01 % max respectively are allowed
the manufacturer, to establish appropriate safety and health
for CGG alloys produced from secondary zinc.
practices, and determine the applicability of regulatory limi-
tations prior to use. E 536 Test Methods for Chemical Analysis of Zinc and Zinc
Alloys
2. Referenced Documents
E 634 Standard Practice for Sampling of Zinc and Zinc
2.1 ASTM Standards: Alloys for Optical Emission Spectrochemical Analysis
B 899 Terminology Relating to Non-ferrous Metals and
3. Terminology
Alloys
E 29 Practice for Using Significant Digits in Test Data to 3.1 Terms shall be defined in accordance with Terminology
Determine Conformance with Specifications B 899.
E 88 Practice for Sampling Nonferrous Metals and Alloys
4 4. Ordering Information
in Cast Form for Determination of Chemical Composition
E 527 Practice for Numbering Metals and Alloys (UNS) 4.1 Orders for CGG alloy under this specification shall
include the following information:
4.1.1 Number of ASTM standard, including year of issue,
4.1.2 Quantity (weight),
This specification is under the jurisdiction of ASTM Committee B02 on
4.1.3 Name of material (CGG),
Nonferrous Metals and Alloys and is the direct responsibility of Subcommittee
4.1.4 Size and shape (Section 7), and
B02.04 on Zinc and Cadmium.
4.1.5 Grade (see Table 1).
Current edition approved Oct. 10, 2000. Published November 2000. Originally
published as B 852-94. Last previous edition B 852-00.
Annual Book of ASTM Standards, Vol 02.04. 5. Materials and Manufacture
Annual Book of ASTM Standards, Vol 14.02.
5.1 The producer shall use care that each shipment of CGG
Annual Book of ASTM Standards, Vol 03.05.
Annual Book of ASTM Standards, Vol 01.01.
Annual Book of ASTM Standards, Vol 03.06.
*A Summary of Changes section appears at the end of this standard.
Copyright © ASTM, 100 Barr Harbor Drive, West Conshohocken, PA 19428-2959, United States.
B 852
alloy be as uniform in quality as possible. shall be bored completely through the slab, care being taken to
avoid starting the drill in a depression, and to adjust the feed to
6. Chemical Composition
give drillings 0.010 to 0.020 in. (0.25 to 0.51 mm) in thickness.
6.1 CGG alloy shall conform to the requirements of Table 1
The drill shall preferably be one twisted from flat stock. The
as determined by chemical analysis by the producer on samples drill diameter shall be ⁄16 in. (8 mm). All the drillings shall
taken at his plant (see Section 9).
either be cut with clean shears or broken into pieces of not over
⁄2 in. (13 mm) in length and mixed thoroughly.
7. Size and Shape
9.2.4 Sawing—Two cuts shall be made completely across
7.1 CGG alloy may be ordered as either jumbos or slabs.
and through the slab from one long side to another with a
7.1.1 Jumbos—large castings of zinc or zinc alloy designed
heat-treated, high-speed saw. Each cut shall be sufficient to
for handling by mechanical equipment. A jumbo usually
give a total sample weight of at least 10 ⁄2 oz (300 g), and all
weighs about 2400 lb (1087 kg). Jumbo shapes may vary,
cuttings from all the slabs shall be mixed thoroughly.
depending on the producer’s practice, and may be referred to as
9.2.5 Storage—The sample shall be split into three equal
strip jumbos or as block jumbos. The nominal weight, dimen-
parts, each of which shall be placed in a sealed package, one
sions, and location of holes or openings shall be as agreed upon
for the producer, one for the customer and, if necessary, one for
between the producer and the customer.
a referee. Tight leakproof paper sample envelopes or cardboard
7.1.2 Slabs—smaller castings of zinc or zinc alloy designed
cartons shall be used to hold the samples.
for manual handling, but often handled by mechanical equip-
9.3 Sampling of jumbos—Representative samples cannot be
ment. A slab usually weighs about 55 lb (25 kg) but may weigh
obtained from large castings (except for remelting the entire
anywhere from 40 to 60 lb (18 to 27 kg). Slabs are usually
ingot in a separate furnace and then taking a sample) because
shipped in strapped bundles weighing about 2200 lb (one
of the potential for segregation. Therefore, alloy cast in the
metric ton). Other bundle weights may be as agreed upon
jumbo form shall be sampled from the pour.
between the producer and the customer.
9.4 Matters of sampling and sample preparation not covered
7.1.3 Other shapes and sizes as may be agreed upon
by this specification shall be in accordance with Practice E 88.
between the producer and the customer may be cast to the
9.5 Samples held at the producer’s plant shall be retained
chemical requirements (Table 1) of this specification.
for not less than 90 days.
9.6 Unless otherwise provided in this section, procedur
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