ASTM A800/A800M-01(2006)

Standard Practice for Steel Casting, Austenitic Alloy, Estimating Ferrite Content Thereof

SCOPE
1.1 This practice covers procedures and definitions for estimating ferrite content in certain grades of austenitic iron-chromium-nickel alloy castings that have compositions balanced to create the formation of ferrite as a second phase in amounts controlled to be within specified limits. Methods are described for estimating ferrite content by chemical, magnetic, and metallographic means.
1.2 The grades covered by this practice are: CF-3, CF-3A, CF-8, CF-8A, CF-3M, CF-3MA, CF-8M, CF-8C, CG-8M, and CH-10.
1.3 The values stated in either inch-pound units or SI units are to be regarded separately 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 the practice.
This standard does not purport to address 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.

General Information

• Status: Historical
• Publication Date: 09-Mar-2001
• ICS: 77.140.80 - Iron and steel castings
• Technical Committee: A01 - Steel, Stainless Steel and Related Alloys
• Drafting Committee: A01.18 - Castings

Relations

• Replaces: ASTM A800/A800M-01 - Standard Practice for Steel Casting, Austenitic Alloy, Estimating Ferrite Content Thereof
• Effective Date: 10-Mar-2001
• Replaced By: ASTM A800/A800M-10 - Standard Practice for Steel Casting, Austenitic Alloy, Estimating Ferrite Content Thereof
• Effective Date: 01-Oct-2010
• Referred By: ASTM A985/A985M-21 - Standard Specification for Steel Investment Castings General Requirements, for Pressure-Containing Parts
• Effective Date: 10-Mar-2001
• Referred By: ASTM A781/A781M-21 - Standard Specification for Castings, Steel and Alloy, Common Requirements, for General Industrial Use
• Effective Date: 10-Mar-2001
• Referred By: ASTM A447/A447M-11(2021) - Standard Specification for Steel Castings, Chromium-Nickel-Iron Alloy (25-12 Class), for High-Temperature Service
• Effective Date: 10-Mar-2001
• Referred By: ASTM A957/A957M-21 - Standard Specification for Investment Castings, Steel and Alloy, Common Requirements, for General Industrial Use
• Effective Date: 10-Mar-2001
• Referred By: ASTM A703/A703M-20a - Standard Specification for Steel Castings, General Requirements, for Pressure-Containing Parts
• Effective Date: 10-Mar-2001

Standards Content (Sample)

NOTICE: This standard has either been superseded and replaced by a new version or withdrawn.
Contact ASTM International (www.astm.org) for the latest information
Designation:A800/A800M–01 (Reapproved 2006)
Standard Practice for
Steel Casting, Austenitic Alloy, Estimating Ferrite Content
1
Thereof
This standard is issued under the fixed designationA800/A800M; 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 E38 Methods for Chemical Analysis of Nickel-Chromium
and Nickel-Chromium-Iron Alloys
1.1 This practice covers procedures and definitions for
E353 Test Methods for Chemical Analysis of Stainless,
estimating ferrite content in certain grades of austenitic iron-
Heat-Resisting, Maraging, and Other Similar Chromium-
chromium-nickel alloy castings that have compositions bal-
Nickel-Iron Alloys
anced to create the formation of ferrite as a second phase in
E562 Test Method for Determining Volume Fraction by
amounts controlled to be within specified limits. Methods are
Systematic Manual Point Count
described for estimating ferrite content by chemical, magnetic,
2.2 Constitution Diagrams:
and metallographic means.
Schoefer Diagram for Estimating Ferrite Content of Stain-
1.2 The grades covered by this practice are: CF-3, CF-3A,
3
less Steel Castings (1980 revision)
CF-8, CF-8A, CF-3M, CF-3MA, CF-8M, CF-8C, CG-8M, and
Schaeffler Diagram for Estimating Ferrite Content of Stain-
CH-10.
4
less Steel Weld Metal
1.3 The values stated in either inch-pound units or SI units
DeLong Diagram for Estimating Ferrite Content of Stainless
are to be regarded separately as standard. Within the text, the
5
Steel Weld Metal
SI units are shown in brackets. The values stated in each
2.3 American Welding Society Specification:
system are not exact equivalents; therefore, each system must
AWS A 4.2, Procedures for Calibrating Magnetic Instru-
be used independently of the other. Combining values from the
ments to Measure the Delta Ferrite Content of Austenitic
two systems may result in nonconformance with the practice.
6
Stainless Steel Weld Metal
1.4 This standard does not purport to address the safety
concerns, if any, associated with its use. It is the responsibility
3. Terminology
of the user of this standard to establish appropriate safety and
3.1 Definitions:
health practices and determine the applicability of regulatory
3.1.1 ferrite—the ferromagnetic, body-centered, cubic-
limitations prior to use.
microstructuralconstituentofvariablechemicalcompositionin
2. Referenced Documents iron-chromium-nickel alloys. This may be formed upon solidi-
2
fication from the molten metal (delta ferrite) or by transforma-
2.1 ASTM Standards:
tion from austenite or sigma phase on cooling in the solid state
A351/A351M Specification for Castings, Austenitic, for
(alpha ferrite).
Pressure-Containing Parts
3.1.2 ferrite content—the proportion of total volume of an
A370 Test Methods and Definitions for Mechanical Testing
iron-chromium-nickel alloy present as the ferrite phase.
of Steel Products
3.1.3 ferrite number—the ferrite content expressed as an
A799/A799M Practice for Steel Castings, Stainless, Instru-
arbitrary number based on the magnetic response of the alloy
ment Calibration, for Estimating Ferrite Content
in a weld deposit.
A941 Terminology Relating to Steel, Stainless Steel, Re-
3.1.4 ferrite percentage—the ferrite content expressed as a
lated Alloys, and Ferroalloys
volume percent.
3.1.5 heat treatment—the definitions in Terminology A941
are applicable to this practice.
1
This practice is under the jurisdiction of ASTM Committee A01 on Steel,
Stainless Steel and Related Alloys and is the direct responsibility of Subcommittee
A01.18 on Castings.
3
Current edition approved March 1, 2006. Published April 2006. Originally Appendix of this practice.
4
approved in 1982. Last previous edition approved in 2001 as A800/A800M – 01. Metal Progress Data Book, American Society for Metals, Mid June 1977, p.
DOI: 10.1520/A0800_A0800M-01R06. 161.
2 5
For referenced ASTM standards, visit the ASTM website, www.astm.org, or Welding Journal, American Welding Society, Vol 38, No. 7, July 1973, p.
contact ASTM Customer Service at [e-mail]. For Annual Book of ASTM 293–s.
6
Standards volume information, refer to the standard’s Document Summary page on Available from American Welding Society (AWS), 550 NW LeJeune Rd.,
the ASTM website. Miami, FL 33126.
Copyright © ASTM International, 100 Barr Harbor Drive, PO Box C700, West Conshohocken, PA 19428-2959, United States.
1

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A800/A800M–01 (2006)
NOTE 1—There may be a substantial decrease in the ferrite content of
4. Significance and Use
weld deposits after solution heat treatment in comparison with the
4.1
...

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: A 800/A 800M – 01 (Reapproved 2006)
Standard Practice for
Steel Casting, Austenitic Alloy, Estimating Ferrite Content
1
Thereof
This standard is issued under the fixed designationA 800/A 800M; 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.
1. Scope
1.1 This practice covers procedures and definitions for estimating ferrite content in certain grades of austenitic iron-chromium-
nickel alloy castings that have compositions balanced to create the formation of ferrite as a second phase in amounts controlled
to be within specified limits. Methods are described for estimating ferrite content by chemical, magnetic, and metallographic
means.
1.2 The grades covered by this practice are: CF-3, CF-3A, CF-8, CF-8A, CF-3M, CF-3MA, CF-8M, CF-8C, CG-8M, and
CH-10.
1.3 Thevaluesstatedineitherinch-poundunitsorSIunitsaretoberegardedseparatelyasstandard.Withinthetext,theSIunits
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 the practice.
1.4 This standard does not purport to address 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
2.1 ASTM Standards:
A 351/A 351M Specification for Castings, Austenitic, for Pressure-Containing Parts
A 370 Test Methods and Definitions for Mechanical Testing of Steel Products
A 799/A 799M Practice for Steel Castings, Stainless, Instrument Calibration, for Estimating Ferrite Content
A 941 Terminology Relating to Steel, Stainless Steel, Related Alloys, and Ferroalloys
E 38 Methods for Chemical Analysis of Nickel-Chromium and Nickel-Chromium-Iron Alloys
E 353 Test Methods for Chemical Analysis of Stainless, Heat-Resisting, Maraging, and Other Similar Chromium-Nickel-Iron
Alloys
E 562 Test Method for Determining Volume Fraction by Systematic Manual Point Count
2.2 Constitution Diagrams:
3
Schoefer Diagram for Estimating Ferrite Content of Stainless Steel Castings (1980 revision)
4
Schaeffler Diagram for Estimating Ferrite Content of Stainless Steel Weld Metal
5
DeLong Diagram for Estimating Ferrite Content of Stainless Steel Weld Metal
2.3 American Welding Society Specification:
AWSA4.2, Procedures for Calibrating Magnetic Instruments to Measure the Delta Ferrite Content ofAustenitic Stainless Steel
6
Weld Metal
3. Terminology
3.1 Definitions:
3.1.1 ferrite—the ferromagnetic, body-centered, cubic-microstructural constituent of variable chemical composition in
iron-chromium-nickel alloys. This may be formed upon solidification from the molten metal (delta ferrite) or by transformation
1
This practice is under the jurisdiction of ASTM Committee A01 on Steel, Stainless Steel, and Related Alloys and is the direct responsibility of Subcommittee A01.18
on Castings.
Current edition approved March 1, 2006. Published April 2006. Originally approved in 1982. Last previous edition approved in 2001 as A 800/A 800M – 01.
2
For referencedASTM standards, visit theASTM website, www.astm.org, or contactASTM Customer Service at [e-mail]. For Annual Book of ASTM Standards
volume information, refer to the standard’s Document Summary page on the ASTM website.
3
Appendix of this practice.
4
Metal Progress Data Book, American Society for Metals, Mid June 1977, p. 161.
5
Welding Journal, American Welding Society, Vol 38, No. 7, July 1973, p. 293–s.
6
Available from American Welding Society (AWS), 550 NW LeJeune Rd., Miami, FL 33126.
Copyright © ASTM International, 100 Barr Harbor Drive, PO Box C700, West Conshohocken, PA 19428-2959, United States.
1

---------------------- Page: 1 ----------------------
A 800/A 800M – 01 (2006)
from austenite or sigma phase on cooling in the solid state (alpha ferrite).
3.1.2 ferrite content—the proportion of total volume of an iron-chromium-nickel alloy present as the ferrite phase.
3.1.3 ferrite number—theferritecontentexpressedasanarbitrarynumberbasedonthemagneticresponseofthealloyinaweld
deposit.
3.1.4 ferrite percentage—the ferrite content expressed as a volume percent.
3.1.5 heat treatment—the definitions in Te
...