ASTM B852-16(2022)

Standard Specification for Continuous Galvanizing Grade (CGG) Zinc Alloys for Hot-Dip Galvanizing of Sheet Steel

ABSTRACT
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. CGG alloy shall be tested and conform to the chemical composition requirements as determined by chemical analysis on samples taken. CGG alloy castings shall be free of undue surface oxide, adhering foreign matter, and any flash that would interfere with handling and use. Samples obtained during casting, drilling or sawing shall be analyzed individually and the average of the individual determinations for the samples from the lot shall be reported as the analysis of the lot.
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, 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 CGG alloys specified in Specification B852 are used in continuous hot-dip galvanizing of steel sheet to produce product, as specified in Specification A653/A653M.  
1.3 Other alloy compositions not included in Specification B852, and as may be agreed upon between the producer and the user, may be used for continuous galvanizing.  
1.4 The values stated in inch-pound units are to be regarded as standard. The values given in parentheses are mathematical conversions to SI units that are provided for information only and are not considered standard.  
1.5 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 Safety Data Sheet (SDS) for this product/material as provided by the manufacturer, to establish appropriate safety, health, and environmental practices, and determine the applicability of regulatory limitations prior to use.  
1.6 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.

General Information

• Status: Published
• Publication Date: 30-Sep-2022
• ICS: 77.120.60 - Lead, zinc, tin and their alloys
• Technical Committee: B02 - Nonferrous Metals and Alloys
• Drafting Committee: B02.04 - Zinc and Cadmium

Relations

• Refers: ASTM E88-11(2017) - Standard Practice for Sampling Nonferrous Metals and Alloys in Cast Form for Determination of Chemical Composition
• Effective Date: 01-Sep-2017
• Refers: ASTM B899-16 - Standard Terminology Relating to Non-ferrous Metals and Alloys
• Effective Date: 01-Oct-2016
• Refers: ASTM B899-15 - Standard Terminology Relating to Non-ferrous Metals and Alloys
• Effective Date: 01-Oct-2015
• Refers: ASTM E536-15 - Standard Test Methods for Chemical Analysis of Zinc and Zinc Alloys
• Effective Date: 01-Jun-2015
• Refers: ASTM B899-14 - Standard Terminology Relating to Non-ferrous Metals and Alloys
• Effective Date: 01-Oct-2014
• Refers: ASTM B897-13 - Standard Specification for Configuration of Zinc and Zinc Alloy Jumbo, Block, Half Block, and Slab Ingot
• Effective Date: 01-Dec-2013
• Refers: ASTM B949-13 - Standard Specification for General Requirements for Zinc and Zinc Alloy Products
• Effective Date: 01-Aug-2013
• Refers: ASTM B899-13 - Standard Terminology Relating to Non-ferrous Metals and Alloys
• Effective Date: 01-Feb-2013
• Refers: ASTM E634-12 - Standard Practice for Sampling of Zinc and Zinc Alloys by Spark Atomic Emission Spectrometry
• Effective Date: 01-Apr-2012
• Refers: ASTM E88-11 - Standard Practice for Sampling Nonferrous Metals and Alloys in Cast Form for Determination of Chemical Composition
• Effective Date: 01-May-2011
• Refers: ASTM B897-10 - Standard Specification for Configuration of Zinc and Zinc Alloy Jumbo Block and Half Block Ingot
• Effective Date: 01-Apr-2010
• Refers: ASTM B897-09 - Standard Specification for Configuration of Zinc and Zinc Alloy Jumbo Block and Half Block Ingot
• Effective Date: 01-Oct-2009
• Refers: ASTM B899-09 - Standard Terminology Relating to Non-ferrous Metals and Alloys
• Effective Date: 01-Oct-2009
• Refers: ASTM B899-09e1 - Standard Terminology Relating to Non-ferrous Metals and Alloys
• Effective Date: 01-Oct-2009
• Refers: ASTM E29-08 - Standard Practice for Using Significant Digits in Test Data to Determine Conformance with Specifications
• Effective Date: 01-Oct-2008

Overview

ASTM B852-16(2022): Standard Specification for Continuous Galvanizing Grade (CGG) Zinc Alloys for Hot-Dip Galvanizing of Sheet Steel provides the requirements for zinc alloys commonly referred to as Continuous Galvanizing Grade (CGG). These alloys, which contain aluminum or a combination of aluminum and lead, are specifically formulated and used in the continuous hot-dip galvanizing process of sheet steel. The standard ensures that CGG zinc alloys meet strict chemical composition criteria, suitable for delivering consistent quality and performance in galvanized steel products.

Key Topics

• CGG Zinc Alloy Composition: ASTM B852 details the acceptable ranges for alloying elements such as aluminum and lead in CGG zinc alloys. These requirements promote the reliability of the hot-dip galvanizing process and the quality of the resulting steel sheet.
• Forms and Sizes: The standard identifies several forms for supply, including jumbos, blocks, and slabs, each designed for different handling methods in industrial settings.
• Quality and Appearance: All CGG alloy castings must be free from excessive surface oxides, adhering foreign matter, and defects that could impede processing.
• Sampling and Analysis: Chemical composition must be verified by chemical analysis, with samples taken during casting or processing. Analytical methods include ASTM and ISO protocols for accuracy and traceability.
• Use of Primary and Secondary Zinc: While primary zinc is standard, secondary zinc sources are also permitted under certain conditions, promoting flexibility and resource efficiency.
• Safety and Regulatory Considerations: ASTM B852 emphasizes the importance of adhering to all relevant safety, health, and environmental requirements, in line with regulatory standards and Safety Data Sheets (SDS).

Applications

The main application of ASTM B852 CGG zinc alloys is in the continuous hot-dip galvanizing of steel sheet. This process is essential for:

• Corrosion Protection: Galvanized steel products benefit from a durable, corrosion-resistant zinc coating, making them ideal for use in construction, automotive, appliance, and infrastructure industries.
• Consistent Processing: Specifying the chemical makeup of CGG zinc alloys ensures predictable performance in large-scale, high-speed galvanizing lines.
• Compatibility with Industry Standards: ASTM B852 alloys are used to manufacture finished products specified under standards such as ASTM A653/A653M, which covers zinc-coated or zinc-iron alloy-coated steel sheet.

Additional potential uses include:

• Tailored Galvanizing Solutions: Provisions are included for producer-user agreements on alternative alloy compositions, offering customization for specific technological or environmental requirements.

Related Standards

ASTM B852-16(2022) references and aligns with several important standards and practices, including:

• ASTM A653/A653M: Specification for Steel Sheet, Zinc-Coated (Galvanized) or Zinc-Iron Alloy-Coated (Galvannealed) by the Hot-Dip Process.
• ASTM B897: Specification for the configuration of zinc and zinc alloy ingots.
• ASTM B949: General requirements for zinc and zinc alloy products, including quality and analysis procedures.
• ASTM B899: Terminology relating to non-ferrous metals and alloys.
• ASTM E536, ISO 3815-1, ISO 3815-2: Standard methods for chemical analysis of zinc and zinc alloys.
• ASTM E29, E88, E527, E634: Practices and test methods supporting accurate results, numbering, and sampling for non-ferrous metals.

Practical Value

Adopting ASTM B852-16(2022) ensures:

• Consistent quality for zinc alloys used in galvanizing, reducing variability in final products.
• Compatibility with major industry standards, supporting efficient sourcing and production.
• Reliable protection for steel products used in harsh and demanding environments.

This standard serves as an essential guideline for producers, users, and quality assurance professionals in the steel and galvanizing industries, promoting safety, performance, and international trade compliance.

Standards Content (Sample)

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.
Designation:B852 −16 (Reapproved 2022)
Standard Specification for
Continuous Galvanizing Grade (CGG) Zinc Alloys for Hot-
Dip Galvanizing of Sheet Steel
This standard is issued under the fixed designation B852; 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.
1. Scope 2. Referenced Documents
2.1 ASTM Standards:
1.1 This specification covers grades of zinc alloys, com-
A653/A653M Specification for Steel Sheet, Zinc-Coated
monly known as Continuous Galvanizing Grade (CGG) alloys
(Galvanized) or Zinc-Iron Alloy-Coated (Galvannealed)
that contain aluminum, or aluminum and lead, that are used in
by the Hot-Dip Process
continuous hot-dip galvanizing of steel sheet. The composi-
B897 Specification for Configuration of Zinc and ZincAlloy
tions for CGG grades made from primary zinc are shown in
Jumbo, Block, Half Block, and Slab Ingot
Table 1. Exceptions for grades made from secondary zinc are
B899 Terminology Relating to Non-ferrous Metals and Al-
found in footnote C.
loys
1.2 CGG alloys specified in Specification B852 are used in
B949 Specification for General Requirements for Zinc and
continuous hot-dip galvanizing of steel sheet to produce Zinc Alloy Products
product, as specified in Specification A653/A653M. E29 Practice for Using Significant Digits in Test Data to
Determine Conformance with Specifications
1.3 Other alloy compositions not included in Specification
E88 Practice for Sampling Nonferrous Metals and Alloys in
B852, and as may be agreed upon between the producer and
Cast Form for Determination of Chemical Composition
the user, may be used for continuous galvanizing.
E527 Practice for Numbering Metals and Alloys in the
Unified Numbering System (UNS)
1.4 The values stated in inch-pound units are to be regarded
E536 Test Methods for Chemical Analysis of Zinc and Zinc
as standard. The values given in parentheses are mathematical
Alloys
conversions to SI units that are provided for information only
E634 Practice for Sampling of Zinc and Zinc Alloys for
and are not considered standard.
Analysis by Spark Atomic Emission Spectrometry
1.5 This standard does not purport to address all of the
2.2 ISO Standards:
safety concerns, if any, associated with its use. It is the
ISO 3815-1 Zinc and zinc alloys — Part 1:Analysis of solid
responsibility of the user of this standard to become familiar
samples by optical emission spectrometry
with all hazards including those identified in the appropriate
ISO 3815-2 Zinc and zinc alloys — Part 2: Analysis by
Safety Data Sheet (SDS) for this product/material as provided
inductively coupled plasma optical emission spectrometry
by the manufacturer, to establish appropriate safety, health,
and environmental practices, and determine the applicability
3. Terminology
of regulatory limitations prior to use.
3.1 Terms shall be defined in accordance with Terminology
1.6 This international standard was developed in accor-
B899.
dance with internationally recognized principles on standard-
ization established in the Decision on Principles for the
4. Ordering Information
Development of International Standards, Guides and Recom-
mendations issued by the World Trade Organization Technical 4.1 Orders for zinc alloy ingot under this specification shall
Barriers to Trade (TBT) Committee. include information as specified in Specification B949.
1 2
This specification is under the jurisdiction of ASTM Committee B02 on For referenced ASTM standards, visit the ASTM website, www.astm.org, or
Nonferrous Metals and Alloys and is the direct responsibility of Subcommittee contact ASTM Customer Service at [e-mail]. For Annual Book of ASTM
B02.04 on Zinc and Cadmium. Standards volume information, refer to the standard’s Document Summary page on
Current edition approved Oct. 1, 2022. Published November 2022. Originally the ASTM website.
ɛ1 3
approved in 1994. Last previous edition approved in 2016 as B852 – 16 . DOI: Available from American National Standards Institute (ANSI), 25 W. 43rd St.,
10.1520/B0852-16R22. 4th Floor, New York, NY 10036, http://www.ansi.org.
Copyright © ASTM International, 100 Barr Harbor Drive, PO Box C700, West Conshohocken, PA 19428-2959. United States
B852−16 (2022)
TABLE 1 Chemical Requirements
dimensions, and location of holes or openings shall be as
Composition,% agreed upon between the producer and the customer.
A
Grade
B
Nominal Range 7.1.3 Slabs—smaller castings of zinc or zinc alloy designed
(UNS)
C
Aluminum Lead Aluminum Lead for manual handling, but often handled by mechanical equip-
Z80310 0.25 . 0.22 to 0.28 0.007 max ment.Aslab usually weig
...