ASTM B572-24

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: B572 − 06 (Reapproved 2016) B572 − 24
Standard Specification for
UNS N06002, UNS N06230, UNS N12160, and UNS R30556
Heat and Corrosion Resistant High Temperature Alloy Bar or
Rod
This standard is issued under the fixed designation B572; 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 Scope*
1.1 This specification covers alloys UNS N06002, UNS N06230, UNS N12160, and UNS R30556alloys in the form of bar or
rod that are typically used in the form of rod for heat for (though not limited to) heat resisting and general-corrosive service.
1.2 The following products are covered under this specification:Alloys that can currently be certified to this specification are UNS
N06002, UNS N06230, UNS N12160, and UNS R30556.
5 3
1.2.1 Rods ⁄16 to ⁄4 in. (7.94 to 19.05 mm) exclusive in diameter, hot or cold finished, solution-annealed, and pickled or
mechanically descaled.
3 1
1.2.2 Rods ⁄4 to 3 ⁄2 in. (19.05 to 88.9 mm) inclusive in diameter, hot or cold finished, solution annealed, ground, or turned.
1.3 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.
1.4 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 Safety Data Sheet
(SDS) for this product/material as provided by the manufacturer, to establish appropriate safety and health practices,safety, health,
and environmental practices and determine the applicability of regulatory limitations prior to use.
1.5 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:
B880 Specification for General Requirements for Chemical Check Analysis Limits for Nickel, Nickel Alloys and Cobalt Alloys
B899 Terminology Relating to Non-ferrous Metals and Alloys
E8E8/E8M Test Methods for Tension Testing of Metallic Materials [Metric] E0008_E0008M
This specification is under the jurisdiction of ASTM Committee B02 on Nonferrous Metals and Alloys and is the direct responsibility of Subcommittee B02.07 on Refined
Nickel and Cobalt and Their Alloys.
Current edition approved June 1, 2016April 1, 2024. Published June 2016April 2024. Originally approved in 1972. Last previous edition approved in 20112016 as
B572B572 – 06 (2016). – 06 (2011). DOI: 10.1520/B0572-06R16. DOI: 10.1520/B0572-24.
For ASME Boiler and Pressure Vessel Code applications see related Specification SB-572 in Section II of that Code.
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.
*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
B572 − 24
E29 Practice for Using Significant Digits in Test Data to Determine Conformance with Specifications
E55 Practice for Sampling Wrought Nonferrous Metals and Alloys for Determination of Chemical Composition
E527 Practice for Numbering Metals and Alloys in the Unified Numbering System (UNS)
E1473 Test Methods for Chemical Analysis of Nickel, Cobalt, and High-Temperature Alloys
3. Terminology
3.1 Common B02.07 terminology is found in Specification B899.
3.2 Definitions of Terms Specific to This Standard:
3.2.1 bar, n—an elongated, forged or rolled metal product with uniform strength, length, and diameter.
3.2.2 rod, n—a hot-finished product of round solid section furnished in straight lengths.
4. Ordering Information
4.1 It is the responsibility of the purchaser to specify all requirements that are necessary for material ordered under this
specification.
4.2 It is the responsibility of the purchaser to specify all requirements that are necessary for material ordered under this
specification. Examples of such requirements include, but are not limited to the following:
4.2.1 Alloy,
4.2.2 Dimensions—Nominal diameter(Section 8 and length. The shortest useable multiple length should be specified (Table 1),
4.1.3 Certification—State if certification or a report of test results is required (Section 16).
4.2.3 Purchaser Inspection—State which tests or inspections are to be witnessed (Section 13), and
4.2.4 Samples for Product (Check) Analysis—State whether samples should be furnished ((Section 9.2.210).
5. Materials and Manufacture
5.1 The finish options for products certified to this specification are:
5.1.1 Hot-Finished, Annealed, and Descaled Rod,
5.1.2 Hot-Finished, Annealed, and Ground Bar,
5.1.3 Hot-Finished, Annealed, and Turned Bar,
5.1.4 Cold-Finished and Annealed Bar, and
5.1.5 Cold-Finished, Annealed, and Ground Bar.
5.2 The diameters permitted for certification for each finish appear in the left column of Table 3.
6. Chemical Composition
6.1 The material shall conform to the requirements as to chemical composition prescribed in Table 21.
6.2 If a product (check) analysis is made by the purchaser, the material shall conform to the requirements specified it shall be done
in Table 2 subject to the permissible tolerances in Specification conformance with Specification B880.
B572 − 24
A
TABLE 21 Chemical Requirements
Composition Limits, %
Element
UNS N06002 UNS N06230 UNS N12160 UNS R30556
A A A
Nickel remainder remainder remainder 19.0–22.5
B B B
Nickel remainder remainder remainder 19.0–22.5
A
Iron 17.0–20.0 3.0 max 3.5 max remainder
B
Iron 17.0–20.0 3.0 3.5 remainder
Chromium 20.5–23.0 20.0–24.0 26.0-30.0 21.0–23.0
Cobalt 0.5–2.5 5.0 max 27.0-33.0 16.0–21.0
Cobalt 0.5–2.5 5.0 27.0-33.0 16.0–21.0
Molybdenum 8.0–10.0 1.0–3.00 1.0 max 2.5–4.0
Molybdenum 8.0–10.0 1.0–3.00 1.0 2.5–4.0
Tungsten 0.2–1.0 13.0–15.0 1.0 max 2.0–3.5
Tungsten 0.2–1.0 13.0–15.0 1.0 2.0–3.5
Carbon 0.05–0.15 0.05–0.15 0.15 max 0.05–0.15
Carbon 0.05–0.15 0.05–0.15 0.15 0.05–0.15
Silicon 1.00 max 0.25–0.75 2.4-3.0 0.20–0.80
Silicon 1.00 0.25–0.75 2.4–3.0 0.20–0.80
Manganese 1.00 max 0.30–1.00 1.5 max 0.50–2.00
Manganese 1.00 0.30–1.00 1.5 0.50–2.00
Phosphorus 0.04 0.030 max 0.030 max 0.04 max
Phosphorus 0.04 0.030 0.030 0.04
Sulfur 0.03 0.015 max 0.015 max 0.015 max
Sulfur 0.03 0.015 0.015 0.015
Columbium . . 1.0 max 0.30 max
C
Niobium . . 1.0 0.30
Tantalum . . . 0.30–1.25
Aluminum . 0.50 max . 0.10–0.50
Aluminum . 0.50 . 0.10–0.50
Zirconium . . . 0.001–0.10
Lanthanum . 0.005–0.050 . 0.005–0.10
Nitrogen . . . 0.10–0.30
Boron . 0.015 max . 0.02 max
Boron . 0.015 . 0.02
Titanium . . 0.20–0.80 .
A
See 12.1.1.Values in the table are maximums unless a range or minimum is
indicated.
B
The composition of the remainder element shall be determined arithmetically by
difference.
C
Columbium and Niobium are interchangeable names for the same element and
both names are acceptable for use in B02.07 specifications.
7. Mechanical and Other Requirements
7.1 The mechanical properties of the material at room temperature shall conform to those shown in Table 32.
7.2 Grain Size—Annealed alloy (UNS N12160) shall conform to an average grain size of ASTM Number 5 or coarser.
8. Dimensions, Mass, and Permissible Variations
8.1 Diameter—The permissible variations from the specified diameter shall be as prescribed in Table 43.
TABLE 32 Mechanical Property Requirements
Elongation in
Tensile Yield Strength
2 in. (50.8mm) or
UNS Strength, min, (0.2 % Offset),
A
4D
ksi (MPA) min, ksi (MPa)
min, %
N06002 95 (660) 35 (240) 35
B
N06230 110 (760) 45 (310) 40
C
N12160 90 (620) 35 (240) 40
D
R30556 100 (690) 45 (310) 40
A
D refers to the diameter of the tension specimen.
B
Solution annealed at a temperature between 2200 to 2275°F (1204 to
1246°C)2200 °F to 2275 °F (1204 °C to 1246 °C) followed by a water quench or
rapidly cooled by other means.
C
Solution annealed at 1950°F (1065°C)1950 °F (1065 °C) minimum.
D
Solution annealed at 2100°F (1150°C)2100 °F (1150 °C) minimum.
B572 − 24
TABLE 4 Permissible Variations in Diameter and Out-of-Roundness of Finished Rods
Permissible Variations, in. (mm)
Specified Diameter, in. (mm) Diameter
Out of Roundness, max
+ −
Hot-Finished, Annealed, and Descaled Rods
5 7
⁄16 to ⁄16 (7.94–11.11), incl 0.012 (0.30) 0.012 (0.30) 0.018 (0.46)
7 5
Over ⁄16 to ⁄8 (11.11–15.87), incl 0.014 (0.36) 0.014 (0.36) 0.020 (0.51)
5 3
Over ⁄8 to ⁄4 (15.87–19.05), excl 0.016 (0.41) 0.016 (0.41) 0.024 (0.61)
Hot-Finished, Annealed, and Ground or Turned Rods
5 5
⁄16 to 3 ⁄8 (19.05–88.9), incl 0.010 (0.25) 0 0.008 (0.20)
TABLE 3 Permissible Variations in Diameter and Out-of-Roundness Products
Permissible Variations, in. (mm)
Specified Diameter, in. (mm) Diameter
Out of Roundness, max
+ −
Hot-Finished, Annealed, and Descaled Rod
5 7
⁄16 to ⁄16 (7.94 to 11.11), incl 0.012 (0.30) 0.012 (0.30) 0.018 (0.46)
7 5
Over ⁄16 to ⁄8 (11.11 to 15.87), incl 0.014 (0.36) 0.014 (0.36) 0.020 (0.51)
Over ⁄8 to 1.0 (15.87 to 25.4), incl 0.016 (0.41) 0.016 (0.41) 0.024 (0.61)
Over 1.0 to 2.0 (25.4 to 50.8), incl 0.031 (0.79) 0.016 (0.41) 0.035 (0.89)
Over 2.0 to 3 ⁄8 (50.8 to 92.08), excl 0.047 (1.19) 0.031 (0.79) 0.058 (1.47)
Hot-Finished, Annealed, and Ground Bar
5 5
⁄16 to 3 ⁄8 (7.94 to 92.08), incl 0.010 (0.25) 0 0.008 (0.20)
Over 3 ⁄8 to 9.0 (92.08 to 228.6), excl 0.050 (1.27) 0 .
Hot-Finished, Annealed, and Turned Bar
3 ⁄8 to 9.0 (92.08 to 228.6) 0.125 (3.18) 0 .
Cold-Finished, Annealed Bar
1 3
⁄8 to ⁄4 (3.18 to 19.05) 0.010 (0.25) 0 0.008 (0.20)
Cold-Finished, Annealed, and Ground Bar
1 3
⁄8 to ⁄4 (3.18 to 19.05) 0.002 (0.05) 0.002 (0.05) 0.002 (0.05)
8.2 Out-of-Roundness—The permissible variation in roundness shall be as prescribed in Table 43.
8.3 Machining Allowances—When the surfaces of finished material are to be machined, the following allowances are suggested
for normal machining operations:
5 11
8.3.1 As-finished (Annealed and Descaled)—For diameters of ⁄16 in. to ⁄16 in. (7.94(7.94 mm to 17.46 mm) incl
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