ASTM A872/A872M-21

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: A872/A872M − 14 A872/A872M − 21
Standard Specification for
Centrifugally Cast Ferritic/Austenitic Stainless Steel Pipe for
Corrosive Environments
This standard is issued under the fixed designation A872/A872M; 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*
1.1 This specification covers centrifugally cast ferritic/austenitic steel pipe intended for general corrosive service. These steels are
susceptible to embrittlement if used for prolonged periods at elevated temperatures.
1.2 Optional supplementary requirements are provided when additional testing may be required.
1.3 The values stated in either inch-pound units or SI units are to be regarded separately as standard. Within the text, SI units are
shown in brackets. The values stated in each system are not exact equivalents; therefore, each system must be used independently
of each other. Combining values from the two systems may result in nonconformance with the specification.
1.4 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.
2. Referenced Documents
2.1 ASTM Standards:
A488/A488M Practice for Steel Castings, Welding, Qualifications of Procedures and Personnel
A781/A781M Specification for Castings, Steel and Alloy, Common Requirements, for General Industrial Use
A999/A999M Specification for General Requirements for Alloy and Stainless Steel Pipe
E29 Practice for Using Significant Digits in Test Data to Determine Conformance with Specifications
E94E94/E94M Guide for Radiographic Examination Using Industrial Radiographic Film
E165E165/E165M Practice for Liquid Penetrant Testing for General Industry
E186 Reference Radiographs for Heavy-Walled (2 to 4 ⁄2 in. (50.8 to 114 mm)) Steel Castings
E280 Reference Radiographs for Heavy-Walled (4 ⁄2 to 12 in. (114 to 305 mm)) Steel Castings
E340 Practice for Macroetching Metals and Alloys
E446 Reference Radiographs for Steel Castings Up to 2 in. (50.8 mm) in Thickness
2.2 ASME Boiler and Pressure Vessel Code:
Section IX Welding Qualifications
This specification 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 May 1, 2014May 1, 2021. Published June 2014May 2021. Originally approved in 1977. Last previous edition approved in 20122014 as
A872/A872M – 07a (2012).A872/A872M – 14. DOI: 10.1520/A0872_A0872M-14.10.1520/A0872_A0872M-21.
For referenced ASTM standards, visit the ASTM website, www.astm.org, or contact ASTM Customer Service at service@astm.org. For Annual Book of ASTM Standards
volume information, refer to the standard’s Document Summary page on the ASTM website.
Available from American Society of Mechanical Engineers (ASME), ASME International Headquarters, Two Park Ave., New York, NY 10016-5990, http://
www.asme.org.
*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
A872/A872M − 21
2.3 ASTM Adjuncts:
Adjunct E186 Reference Radiographs—Transparencies in Ringbinders, 3Three Volumes
Adjunct E280 Reference Radiographs—Transparencies in Ringbinders, 2Two Volumes
Adjunct E446 Reference Radiographs—Transparencies in Ringbinders, 3Three Volumes
3. Ordering Information
3.1 Orders for material to this specification shall include the following, as required, to describe the desired material adequately.
3.1.1 Quantity (feet [metres] or number of lengths),
3.1.2 Name of material (centrifugally cast ferritic/austenitic steel pipe),
3.1.3 Grade (Table 1),
3.1.4 Size (outside or inside diameter and minimum wall thickness in inches [millimetres]),
3.1.5 Length (specific or random, Specification A999/A999M),
3.1.6 End finish of Specification A999/A999M,
3.1.7 Optional Requirements (S1 through S6),
3.1.8 Test report required (Section 12), and
3.1.9 Special requirements or additions to the specification.
A
TABLE 1 Chemical Requirements
Grade
Element
UNS J94300
UNS J93183 UNS J93550
CD4MCuMN
C 0.030 0.030 0.04
Mn 2.0 2.0 0.50–1.50
P 0.040 0.040 0.04
S 0.030 0.030 0.04
Si 2.0 2.0 1.10
Ni 4.00–6.00 5.00–8.00 4.5–6.0
Cr 20.0–23.0 23.0–26.0 24.5–26.5
Mo 2.00–4.00 2.00–4.00 2.5–4.0
N 0.08–0.25 0.08–0.25 0.18–0.26
Cu 1.00 1.00 1.3–3.0
Co 0.50–1.50 0.50–1.50 .
A
TABLE 1 Chemical Composition Requirements
Grade
Element, %
UNS J94300
UNS J93183 UNS J93550
CD4MCuMN
Carbon 0.030 0.030 0.04
Manganese 2.0 2.0 0.50–1.50
Phosphorus 0.040 0.040 0.04
Sulfur 0.030 0.030 0.04
Silicon 2.0 2.0 1.10
Chromium 20.0–23.0 23.0–26.0 24.5–26.5
Nickel 4.00–6.00 5.00–8.00 4.5–6.0
Molybdenum 2.00–4.00 2.00–4.00 2.5–4.0
Nitrogen 0.08–0.25 0.08–0.25 0.18–0.26
Copper 1.00 1.00 1.3–3.0
Cobalt 0.50–1.50 0.50–1.50 . . .
A
Values are maximums unless a range or minimum is indicated. Where ellipses ({) appear in this table there is no requirement, and the element need not be analyzed
or reported.
Available from ASTM International Headquarters. Request RRE018601 for Vol I, RRE018602 for Vol II, and RRE018603 for Vol III.
Available from ASTM International Headquarters. Request for RRE028001 Vol I and RRE028002 for Vol II.
Available from ASTM International Headquarters. Request for RRE044601 Vol I, RRE044602 for Vol II, and RRE044603 for Vol III.
A872/A872M − 21
4. General Requirements
4.1 Material furnished under this specification shall conform to the applicable requirements of the current edition of Specification
A999/A999M, unless otherwise provided herein.
5. Materials and Manufacture
5.1 Manufacture:
5.1.1 The pipe shall be made by the centrifugal casting process.
5.1.2 All pipes shall be furnished in the heat-treated condition as shown in Table 2.
5.1.3 Machining—The pipe shall be machined on the inner surface and may be supplied either machined or unmachined in the
outer surface. All machining shall be to a roughness value agreed upon between the manufacturer and purchaser.
6. Chemical Composition
6.1 Heat Analysis—An analysis of each heat shall be made by the manufacturer to determine the percentages of elements specified
in Table 1. The analysis shall be made on a test sample taken preferably during the pouring of the heat. The chemical composition
thus determined shall conform to the requirements specified in Table 1.
6.2 Product Analysis—A product analysis may be made by the purchaser. The sample for analysis shall be selected so as to be
thoroughly representative of the pipe being analyzed. The chemical composition thus determined shall conform to the requirements
specified in Table 1.
6.3 To determine conformance with the chemical analysis requirements, an observed value or calculated value shall be rounded
in accordance with Practice E29 to the nearest unit in the last right-hand place of values listed in Table 1.
7. Tensile Requirements
7.1 Testing—Steel used for the castings shall conform to the tensile and hardness requirements specified in Table 3.
7.2 Test Specimens:
7.2.1 Test bars shall be taken from heat-treated castings.
7.2.2 Tension test specimens shall be the standard round 2-in[50-mm] 2-in. [50-mm] gage length specimen.
7.3 Number of Tests:
7.3.1 One tension test shall be made from each heat.
TABLE 2 Heat Treatment Requirements
Condition
Grade
Temperature,
Quenching
°F [°C]
UNS J93183 1920–2100 Water quench or rapid
[1050–1150] cooling by other means
UNS J93183 1920–2100 Water quench or rapid
[1050–1150] cooling by other means
UNS J93550 1920–2100 Water quench or rapid
[1050–1150] cooling by other means
UNS J94300 1900 minimum Water quench or rapid
CD4MCuMN cooling by other means
A872/A872M − 21
A
TABLE 3 Tensile and Hardness Requirements
Grade
Requirement
UNS J94300
UNS J93183 UNS J93550
CD4MCuMN
Tensile strength, min, ksi [MPa] 90 [620] 90 [620] 110 [760]
Yield strength, min, ksi [MPa] 65 [450] 65 [450] 70 [480]
Elongation in 2 in. or 50 mm, min, % 25 20 20
Hardness, max:
Brinell 290 297 .
Brinell 290 297 . . .
Rockwell C 30.5 31.5 .
Rockwell C 30.5 31.5 . . .
A
Where ellipses ({) appear in this table ther
...