ASTM B434-22

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: B434 − 06 (Reapproved 2016) B434 − 22
Standard Specification for
Nickel-Molybdenum-Chromium-Iron Alloys (UNS N10003,
UNS N10242) Plate, Sheet, and Strip
This standard is issued under the fixed designation B434; 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 nickel-molybdenum-chromium-iron alloys (UNS N10003 and UNS N10242)in the form of plate,
sheet, and strip for use in general corrosive service.strip. The alloys are typically for general corrosive service, but are not limited
to this usage.
1.2 The following products are covered under this specification:Alloys that can currently be certified to this specification are UNS
N10003 and UNS N10242.
1.2.1 Sheet and Strip—Hot or cold rolled, annealed, and descaled unless annealing is performed in an atmosphere yielding a bright
finish.
1.2.2 Plate—Hot rolled, annealed, and descaled.
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 safety, health, and healthenvi-
ronmental 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
B906 Specification for General Requirements for Flat-Rolled Nickel and Nickel Alloys Plate, Sheet, and Strip
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, 2016Oct. 1, 2022. Published June 2016November 2022. Originally approved in 1966. Last previous edition approved in 20112016 as
B434 – 06 (2011).(2016). DOI: 10.1520/B0434-06R16.10.1520/B0434-22.
For ASME Boiler and Pressure Vessel Code applications see related Specification SB-434 in section II of that Code.
New designation established in accordance with Practice E527 and SAE J1086, Recommended 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
B434 − 22
B1015 Practice for Form and Style of Standards Relating to Refined Nickel and Cobalt and Their Alloys
E527 Practice for Numbering Metals and Alloys in the Unified Numbering System (UNS)
3. Terminology
3.1 Definitions of Terms Specific to This Standard:
3.1.1 plate, n—material ⁄16 in. (4.76 mm) and over in thickness.
3.1.2 sheet and strip, n—material under ⁄16 in. (4.76 mm) in thickness.
3.1 Common B02.07 terminology is found in Specification B899.
3.2 The definitions for plate, sheet, and strip used in Specification B906 apply to the products of this specification with the
following adjustments:
3.2.1 Strip can be either a cold-rolled or hot-rolled material.
3.2.2 The finishes allowed for products certified to this specification are stipulated in Section 6.
4. General Requirements
4.1 Material furnished under this specification shall conform to the applicable requirements of Specification B906 unless otherwise
provided herein.
4.2 Product furnished to this specification shall conform to the requirements of Specification B906. Failure to comply with the
general requirements of Specification B906 constitutes nonconformance with this specification. In case of conflict between the
requirements and this specification, and the requirements of Specification B906, this specification shall prevail.
5. Ordering Information
5.1 It is the responsibility of the purchaser to specify all requirements that are necessary for the safe and satisfactory performance
of material ordered under this specification. Examples of such requirements include but are not limited to the following:to this
specification.
5.1.1 Dimensions—Thickness (in decimals of an inch), width, and length (inch or fraction of an inch),
5.1.2 Certification—State if certification or a report of test results is required,
5.1.3 Purchase Inspection—State which tests or inspections are to be witnessed, and
5.1.4 Samples for Product (Check) Analysis—State whether samples shall be furnished.
5.2 Refer to the ordering information section of Specification B906 for examples of requirements.
6. Materials and Manufacture
6.1 The products certified to this specification shall have been manufactured in accordance with Specification B906.
6.2 The finish of the final products certified to this specification are:
6.2.1 Sheet and Strip—Hot- or cold-rolled, annealed, and descaled unless annealing is performed in an atmosphere yielding a
bright finish.
6.2.2 Plate—Hot-rolled, annealed, and descaled.
B434 − 22
7. Chemical Composition
7.1 The material shall conform to the requirements as to chemical compositionchemical requirements prescribed in Table 1.
7.2 If a product (check) analysis is made by the purchaser, the material shall conform to the requirements specified it shall be done
in Table 1 subject to the permissible tolerances in conformance with Specification B906B880.
8. Mechanical Properties and Other Requirements
8.1 Tensile Properties—The material shall conform to the room temperature tensile properties prescribed in Table 2.
8.2 Grain Size for Sheet and Strip—Sheet and strip shall conform to the grain size requirements given in Table 3.
9. Dimensions and Permissible Variations
9.1 Weight—For calculation of mass or weight, the following densities shall be used:
3 3
Alloy lb/inlb/in. g/cm
N10003 0.317 8.78
N10242 0.327 9.05
9.2 Thickness:
TABLE 1 Chemical Requirements
Composition, %
Element
UNS N10242 UNS N10003
Chromium 7.0-9.0 6.0–8.0
Iron, max 2.0 5.0
Carbon 0.03 max 0.04–0.08
Silicon, max 0.80 1.00
Cob
...