ASTM A800/A800M-01

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.
1.4 This standard does not purport to address the safety problems, 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-91(1997)e1 - Standard Practice for Steel Casting, Austenitic Alloy, Estimating Ferrite Content Thereof
• Effective Date: 10-Mar-2001
• Replaced By: ASTM A800/A800M-01(2006) - Standard Practice for Steel Casting, Austenitic Alloy, Estimating Ferrite Content Thereof
• 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
• 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 A781/A781M-21 - Standard Specification for Castings, Steel and Alloy, Common Requirements, for General Industrial Use
• Effective Date: 10-Mar-2001
• Referred By: ASTM A985/A985M-21 - Standard Specification for Steel Investment 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
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.
5
1. Scope and Nickel-Chromium-Iron Alloys
E 353 Test Methods for Chemical Analysis of Stainless,
1.1 This practice covers procedures and definitions for
Heat-Resisting, Maraging, and Other Similar Chromium-
estimating ferrite content in certain grades of austenitic iron-
6
Nickel-Iron Alloys
chromium-nickel alloy castings that have compositions bal-
E 562 Practice for Determining Volume Fraction by Sys-
anced to create the formation of ferrite as a second phase in
7
tematic Manual Point Count
amounts controlled to be within specified limits. Methods are
2.2 Constitution Diagrams:
described for estimating ferrite content by chemical, magnetic,
Schoefer Diagram for Estimating Ferrite Content of Stain-
and metallographic means.
8
less Steel Castings (1980 revision)
1.2 The grades covered by this practice are: CF-3, CF-3A,
Schaeffler Diagram for Estimating Ferrite Content of Stain-
CF-8, CF-8A, CF-3M, CF-3MA, CF-8M, CF-8C, CG-8M, and
9
less Steel Weld Metal
CH-10.
DeLong Diagram for Estimating Ferrite Content of Stainless
1.3 The values stated in either inch-pound units or SI units
10
Steel Weld Metal
are to be regarded separately as standard. Within the text, the
2.3 American Welding Society Specification:
SI units are shown in brackets. The values stated in each
AWS A 4.2, Procedures for Calibrating Magnetic Instru-
system are not exact equivalents; therefore, each system must
ments to Measure the Delta Ferrite Content of Austenitic
be used independently of the other. Combining values from the
11
Stainless Steel Weld Metal
two systems may result in nonconformance with the practice.
1.4 This standard does not purport to address the safety
3. Terminology
concerns, if any, associated with its use. It is the responsibility
3.1 Definitions:
of the user of this standard to establish appropriate safety and
3.1.1 ferrite—the ferromagnetic, body-centered, cubic-
health practices and determine the applicability of regulatory
microstructuralconstituentofvariablechemicalcompositionin
limitations prior to use.
iron-chromium-nickel alloys. This may be formed upon solidi-
2. Referenced Documents fication from the molten metal (delta ferrite) or by transforma-
tion from austenite or sigma phase on cooling in the solid state
2.1 ASTM Standards:
(alpha ferrite).
A 351/A 351M Specification for Castings, Austenitic, Aus-
2
3.1.2 ferrite content—the proportion of total volume of an
tenitic–Ferritic (Duplex), for Pressure–Containing Parts
iron-chromium-nickel alloy present as the ferrite phase.
A 370 Test Methods and Definitions for MechanicalTesting
3
3.1.3 ferrite number—the ferrite content expressed as an
of Steel Products
arbitrary number based on the magnetic response of the alloy
A 799/A 799M Practice for Steel Castings, Stainless, In-
2
in a weld deposit.
strument Calibration, for Estimating Ferrite Content
3.1.4 ferrite percentage—the ferrite content expressed as a
A 941 Terminology Relating to Steel, Stainless Steel, Re-
4
volume percent.
lated Alloys, and Ferroalloys
E 38 Methods for Chemical Analysis of Nickel-Chromium
5
Discontinued; see 1988 Annual Book of ASTM Standards, Vol 03.05.
1 6
This practice is under the jurisdiction of ASTM Committee A01 on Steel, Annual Book of ASTM Standards, Vol 03.05.
7
Stainless Steel, and RelatedAlloys and is the direct responsibility of Subcommittee Annual Book of ASTM Standards, Vol 03.01.
8
A01.18 on Castings. Appendix of this practice.
9
Current edition approved Mar. 10, 2001. Published May 2001. Originally Metal Progress Data Book, American Society for Metals, Mid June 1977, p.
published as A 800 – 82. Last previous edition A 800/A 800M – 91 (Reapproved 161.
10
1997). Welding Journal, American Welding Society, Vol 38, No. 7, July 1973, p.
2
Annual Book of ASTM Standards, Vol 01.02. 293–s.
3 11
Annual Book of ASTM Standards, Vol 01.03. Available from the American Welding Society, P. O. Box 351040, 550 N. W.
4
Annual Book of ASTM Standards, Vol 01.01. LeJeune Rd., Miami, FL 33135.
Copyright © ASTM International, 100 Barr Harbor Drive, PO Box C700, West Conshohocken, PA 19428-2959, United States.
1

---------------------- Page: 1 ----------------------
A800/A800M–01
3.1.5 heat treatment—the definitions in Terminology A 941 purchaser, required ferrite content range, in ferrite number, for
are applicable to this practice. weld deposits (Note 1) as deposi
...