ASTM B472-23

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: B472 − 18 B472 − 23
Standard Specification for
Nickel Alloy Billets and Bars for Reforging
This standard is issued under the fixed designation B472; 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.
This standard has been approved for use by agencies of the U.S. Department of Defense.
1. Scope Scope*
1.1 This specification covers UNS N06002, UNS N06030, UNS N06035, UNS N06022, UNS N06200, UNS N10362, UNS
N06230, UNS N06600, UNS N06617, UNS N06625, UNS N08020, UNS N08026, UNS N08024, UNS N08120, UNS N08926,
UNS N08367, UNS N10242, UNS N10276, UNS N10665, UNS N10675, UNS N12160, UNS R20033, UNS N06059, UNS
N06686, UNS N10629, UNS N08031, UNS N06045, UNS N06025, UNS N06699, and UNS R30556 billets and bars for
reforging.
1.2 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.
1.3 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.
1.4 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:
A262 Practices for Detecting Susceptibility to Intergranular Attack in Austenitic Stainless Steels
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
E1473 Test Methods for Chemical Analysis of Nickel, Cobalt, and High-Temperature Alloys
3. Terminology
3.1 Definitions:
3.1.1 For definitions of terms used in this specification, refer to Terminology B899.
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 Nov. 1, 2018Dec. 1, 2023. Published November 2018December 2023. Originally approved in 1968. Last previous edition approved in 20152018
as B472B472 – 18. – 10 (2015). DOI: 10.1520/B0472-18. DOI: 10.1520/B0472-23.
Designation established in accordance with ASTM E527 and SAE J1086, Practice for Numbering Metals and Alloys (UNS).
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
B472 − 23
3.1.2 Terminology in this specification shall conform to the requirements of Terminology B899 including any supplementary
requirements indicated in the purchase order or contract. In case of conflict between the requirements of this specification and
Terminology B899, this specification shall prevail.
3.2 Definitions of Terms Specific to This Standard:
3.2.1 billets and bars, n—terms billets and bars as used in this specification shall be understood as billets and bars for reforging.
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. Examples of such requirements include, but are not limited to, the following:
4.1.1 Quantity (weight or number of pieces),
4.1.2 Name of material or UNS number,
4.1.3 Form (bar or billet),
4.1.4 Dimensions,
4.1.5 ASTM designation and year of issue,
4.1.6 Inspection (12.1),
4.1.7 Certification—State if certification or a report of test results is required (Section 14),
4.1.8 Supplementary requirements, if any, and
4.1.9 If possible, the intended end use.
NOTE 1—A typical ordering description is as follows: 10 000 lb (4536 kg), UNS N08020, forging bar, 4 ⁄4 in. (107.95 mm) round, Specification B472.
5. Materials and Manufacture
5.1 The products shall be hot worked from ingots by rolling, forging, extruding, hammering, or pressing.
5.2 The products may be conditioned by chipping, grinding, or machining to remove injurious surface defects provided the depth
of conditioning does not exceed that which will affect the surface condition or dimensions of the article to be forged from the bar
or billet.
6. Chemical Composition
6.1 The material shall conform to the requirements as to chemical composition prescribed in Table 1.
6.2 If a product (check) analysis is performed by the purchaser, the material shall conform to the requirements specified in Table
1 subject to the permissible tolerances in Specification B880.
7. Dimensions and Permissible Variations
7.1 Billets shall conform to the shapes and dimensions specified by the purchaser within a permissible variation of 65 %.
7.2 Bars shall conform to the shape and dimensions specified by the purchaser within the permissible variations prescribed in
Table 2.
B472 − 23
A
TABLE 1 Chemical Requirements
Composition, %
Element
UNS UNS UNS UNS UNS UNS
N08026 N08020 N08024 N08367 N08926 R20033
Carbon, max 0.03 0.07 0.03 0.030 0.020 0.015
Carbon 0.03 0.07 0.03 0.030 0.020 0.015
Manganese, max 1.00 2.00 1.00 2.00 2.00 2.0
Manganese 1.00 2.00 1.00 2.00 2.00 2.0
Phosphorus, max 0.03 0.045 0.035 0.040 0.03 0.02
Phosphorus 0.03 0.045 0.035 0.040 0.03 0.02
Sulfur, max 0.03 0.035 0.035 0.030 0.01 0.01
Sulfur 0.03 0.035 0.035 0.030 0.01 0.01
Silicon, max 0.50 1.00 0.50 1.00 0.50 0.50
Silicon 0.50 1.00 0.50 1.00 0.50 0.50
Nickel 33.00–37.20 32.00–38.00 35.00–40.00 23.50–25.50 24.00–26.00 30.0–33.0
Chromium 22.00–26.00 19.00–21.00 22.50–25.00 20.00–22.00 19.00–21.00 31.0–35.0
Molybdenum 5.00–6.70 2.00–3.00 3.50–5.00 6.00–7.00 6.0–7.0 0.50–2.0
Copper 2.00–4.00 3.00–4.00 0.50–1.50 0.75 max 0.5–1.5 0.30–1.20
Copper 2.00–4.00 3.00–4.00 0.50–1.50 0.75 0.5–1.5 0.30–1.20
Columbium (Nb) + . 8 × carbon–1.00 0.15–0.35 . . .
tantalum
C
Niobium (Nb) + . 8 × C–1.00 0.15–0.35 . . .
Tantalum
Nitrogen 0.10–0.16 . . 0.18–0.25 0.15–0.25 0.35–0.60
A
Iron remainder remainder remainder remainder balance balance
B
Iron rem rem rem rem rem rem
Composition, %
Element
UNS UNS UNS UNS UNS UNS UNS UNS UNS
N06030 N06022 N06200 N10362 N10276 N10665 N10675 N06002 N06230
Carbon, max 0.03 0.015 0.010 0.010 0.010 0.02 0.01 0.05-0.15 0.05-0.15
Carbon 0.03 0.015 0.010 0.010 0.010 0.02 0.01 0.05-0.15 0.05-0.15
Manganese, max 1.5 0.50 0.50 0.60 1.0 1.0 3.0 1.00 0.30-1.00
Manganese 1.5 0.50 0.50 0.60 1.0 1.0 3.0 1.00 0.30-1.00
Phosphorous, max 0.04 0.02 0.025 0.025 0.04 0.04 0.030 0.04 0.030
Phosphorous 0.04 0.02 0.025 0.025 0.04 0.04 0.030 0.04 0.030
Sulfur, max 0.02 0.02 0.010 0.010 0.03 0.03 0.010 0.03 0.015
Sulfur 0.02 0.02 0.010 0.010 0.03 0.03 0.010 0.03 0.015
Silicon, max 0.8 0.08 0.08 0.08 0.08 0.10 0.10 1.00 0.25-0.75
Silicon 0.8 0.08 0.08 0.08 0.08 0.10 0.10 1.00 0.25-0.75
A A
Nickel remainder remainder remainder remainder remainder remainder 65.0 min remainder remainder
B B B
Nickel rem rem rem rem rem rem 65.0 min rem rem
Chromium 28.0-31.5 20.0-22.5 22.0-24.0 13.8-15.6 14.5-16.5 1.0 max 1.0-3.0 20.5-23.0 20.0-24.0
Chromium 28.0-31.5 20.0-22.5 22.0-24.0 13.8-15.6 14.5-16.5 1.0 1.0-3.0 20.5-23.0 20.0-24.0
Molybdenum 4.0-6.0 12.5-14.5 15.0-17.0 21.5-23.0 15.0-17.0 26.0-30.0 27.0-32.0 8.0-10.0 1.0-3.00
Copper 1.0-2.4 . 1.3-1.9 . . . 0.20 . .
Columbium (Nb) + 0.30-1.50 . . . . . . . .
tantalum
C
Niobium (Nb) + 0.30-1.50 . . . . . . . .
Tantalum
Iron 13.0-17.0 2.0-6.0 3.0 max 1.25 max 4.0-7.0 2.0 max 1.0-3.0 17.0-20.0 3.0 max
Iron 13.0-17.0 2.0-6.0 3.0 1.25 4.0-7.0 2.0 1.0-3.0 17.0-20.0 3.0
Cobalt, max 5.0 2.5 2.0 . 2.5 1.0 3.0 0.5-2.5 5.0
Cobalt 5.0 2.5 2.0 . 2.5 1.0 3.0 0.5-2.5 5.0
Tungsten 1.5-4.0 2.5-3.5 . . 3.0-4.5 . 3.0 max 0.2-1.0 13.0-15.0
Tungsten 1.5-4.0 2.5-3.5 . . 3.0-4.5 . 3.0 0.2-1.0 13.0-15.0
Vanadium, max . 0.35 . . 0.35 . 0.20 . .
Vanadium . 0.35 . . 0.35 . 0.20 . .
Titanium, max . . . . . . 0.2 . .
Titanium . . . . . . 0.2 . .
Zirconium, max . . . . . . 0.10 . .
Zirconium . . . . . . 0.10 . .
Columbium (Nb) . . . . . . 0.20 max . .
C
Niobium (Nb) . . . . . . 0.20 . .
Tantalum . . . . . . 0.20 max
Tantalum . . . . . . 0.20
Nickel + . . . . . . 94.0-98.0 . .
Molybdenum
Aluminum, max . . 0.50 0.50 . . 0.50 . 0.20-0.50
Aluminum . . 0.50 0.50 . . 0.50 . 0.20-0.50
Lanthanum . . . . . . . . 0.005-0.050
Boron . . . . . . . . 0.015 max
Boron . . . . . . . . 0.015
B472 − 23
TABLE 1 Continued
Composition, %
UNS UNS UNS UNS UNS UNS UNS UNS UNS
Element
N06699 N12160 R30556 N06625 N06600 N10242 N08120 N06617 N06035
Carbon 0.005-0.10 0.15 max 0.05-0.15 0.10 max 0.15 max 0.03 0.02-0.10 0.05-0.15 0.050 max
Carbon 0.005-0.10 0.15 0.05-0.15 0.10 0.15 0.03 0.02-0.10 0.05-0.15 0.050
Manganese 0.50 max 1.5 max 0.50-2.00 0.50 max 1.0 max 0.80 max 1.5 max 1.0 max 0.50 max
Manganese 0.50 1.5 0.50-2.00 0.50 1.0 0.80 1.5 1.0 0.50
Phosphorous 0.02 max 0.030 max 0.04 max 0.015 max . 0.030 max 0.040 max . 0.030 max
Phosphorous 0.02 0.030 0.04 0.015 . 0.030 0.040 . 0.030
Sulfur 0.01 max 0.015 max 0.015 max 0.015 max 0.015 max 0.015 max 0.03 max 0.015 max 0.015 max
Sulfur 0.01 0.015 0.015 0.015 0.015 0.015 0.03 0.015 0.015
Silicon 0.50 max 2.4-3.0 0.20-0.80 0.50 max 0.50 max 0.80 max 1.0 max 1.0 max 0.6
...