ASTM B512-20

Standard Specification for Nickel-Chromium-Silicon Alloy Billets and Bars

ABSTRACT
This specification covers wrought heat-resisting alloy UNS N08330 in the form of billets and bars only for reforging. The material shall undergo chemical and product analysis and conform to the requirements as to chemical composition specified for carbon, manganese, phosphorus, sulfur, silicon, chromium, nickel, copper, lead, tin, and iron.
SCOPE
1.1 This specification covers wrought heat-resisting alloy UNS N08330 in the form of billets and bars only 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 Material Safety Data Sheet (MSDS) 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.

General Information

• Status: Published
• Publication Date: 31-Mar-2020
• ICS: 77.150.40 - Nickel and chromium products
• Technical Committee: B02 - Nonferrous Metals and Alloys
• Drafting Committee: B02.07 - Refined Nickel and Cobalt and Their Alloys

Relations

• Replaces: ASTM B512-04(2014) - Standard Specification for Nickel-Chromium-Silicon Alloy (UNS N08330) Billets and Bars
• Effective Date: 01-Apr-2020
• Refers: ASTM E29-08 - Standard Practice for Using Significant Digits in Test Data to Determine Conformance with Specifications
• Effective Date: 01-Oct-2008
• Refers: ASTM B880-03(2008) - Standard Specification for General Requirements for Chemical Check Analysis Limits for Nickel, Nickel Alloys and Cobalt Alloys
• Effective Date: 01-Mar-2008
• Refers: ASTM E29-06b - Standard Practice for Using Significant Digits in Test Data to Determine Conformance with Specifications
• Effective Date: 15-Nov-2006
• Refers: ASTM E29-06a - Standard Practice for Using Significant Digits in Test Data to Determine Conformance with Specifications
• Effective Date: 15-Sep-2006
• Refers: ASTM E29-06 - Standard Practice for Using Significant Digits in Test Data to Determine Conformance with Specifications
• Effective Date: 01-May-2006
• Refers: ASTM E29-04 - Standard Practice for Using Significant Digits in Test Data to Determine Conformance with Specifications
• Effective Date: 01-Dec-2004
• Refers: ASTM E1473-03 - Standard Test Methods for Chemical Analysis of Nickel, Cobalt, and High-Temperature Alloys
• Effective Date: 01-Dec-2003
• Refers: ASTM E1473-94a(2003) - Standard Test Methods for Chemical Analysis of Nickel, Cobalt, and High-Temperature Alloys
• Effective Date: 01-Oct-2003
• Refers: ASTM B880-03 - Standard Specification for General Requirements for Chemical Check Analysis Limits for Nickel, Nickel Alloys, and Cobalt Alloys
• Effective Date: 10-Jul-2003
• Refers: ASTM E29-02e1 - Standard Practice for Using Significant Digits in Test Data to Determine Conformance with Specifications
• Effective Date: 10-May-2002
• Refers: ASTM E29-93a(1999) - Standard Practice for Using Significant Digits in Test Data to Determine Conformance with Specifications
• Effective Date: 10-May-1999
• Refers: ASTM E1473-94a(1998) - Standard Test Methods for Chemical Analysis of Nickel, Cobalt, and High-Temperature Alloys
• Effective Date: 10-Dec-1998
• Refers: ASTM B880-98 - Standard Specification for General Requirements for Chemical Check Analysis Limits for Nickel, Nickel Alloys, and Cobalt Alloys
• Effective Date: 10-Apr-1998
• Referred By: ASTM B366/B366M-23 - Standard Specification for Factory-Made Wrought Nickel and Nickel Alloy Fittings
• Effective Date: 01-Apr-2020

Overview

ASTM B512-20 is the recognized standard specification developed by ASTM International for Nickel-Chromium-Silicon Alloy UNS N08330 billets and bars intended exclusively for reforging applications. This standard outlines the requirements for chemical composition, permissible variations, product analysis, ordering information, certification, marking, and inspection procedures for these heat-resisting alloys. As a key reference for producers and purchasers, compliance with ASTM B512-20 ensures product quality and consistency for nickel-chromium-silicon bars and billets used in high-temperature and demanding industrial environments.

Key Topics

• Material Scope:
  • Applies only to wrought billets and bars composed of Nickel-Chromium-Silicon Alloy UNS N08330.
  • Shapes include round and round-cornered square solid sections, supplied in straight lengths.
• Chemical Composition:
  • Strict limits on elements such as carbon, manganese, phosphorus, sulfur, silicon, chromium, nickel, copper, lead, tin, and iron.
  • Product analysis to verify adherence to prescribed chemistry.
• Product Quality:
  • Requirements for uniformity, commercial straightness, and freedom from injurious defects.
  • Surface conditioning allowed (chipping or grinding) within defined tolerances.
• Ordering and Certification:
  • Purchaser must specify essential requirements including alloy name, section, dimensions, quantity, and need for certification.
  • Certification and reporting of test results provided upon request as part of the purchasing contract.
• Inspection and Testing:
  • Chemical analysis and check analysis as primary quality assurance methods.
  • Sampling and number of tests defined per lot.
  • Inspection criteria may be established by agreement between purchaser and supplier.

Applications

The ASTM B512-20 standard supports a wide range of industrial users who require high-temperature-resistant billets and bars for further forging operations. Typical applications and benefits include:

• Aerospace and Power Generation:
  • Essential for components exposed to extreme heat and stress.
• Petrochemical and Chemical Processing:
  • Suitable for equipment and assemblies requiring robust corrosion and oxidation resistance.
• Furnace and Heat Treatment Industries:
  • Ideal for forged parts and structural items in furnaces due to excellent heat resistance.
• Reforging Operations:
  • Designed specifically for further processing into custom shapes and components that demand rigorous metallurgical reliability.

The specified control of chemical composition provides confidence in performance, especially where material integrity under high temperature is critical. By adhering to ASTM B512-20, manufacturers and purchasers assure safety, durability, and performance of reforged nickel-chromium-silicon alloy components.

Related Standards

Users of ASTM B512-20 may find the following related standards helpful:

• ASTM B880: Specification for General Requirements for Chemical Check Analysis Limits for Nickel, Nickel Alloys, and Cobalt Alloys.
• ASTM E29: Practice for Using Significant Digits in Test Data to Determine Conformance with Specifications.
• ASTM E1473: Test Methods for Chemical Analysis of Nickel, Cobalt, and High-Temperature Alloys.

Consulting these related ASTM standards can enhance the accuracy, consistency, and compliance of billets and bars used in demanding applications.

Keywords: ASTM B512-20, Nickel-Chromium-Silicon Alloy, UNS N08330, billets, bars, reforging, high-temperature alloy, chemical composition standard, industrial alloy standards.

Standards Content (Sample)

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.
Designation:B512 −20
Standard Specification for
Nickel-Chromium-Silicon Alloy Billets and Bars
This standard is issued under the fixed designation B512; 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* 3.1.1 bar, n—material of round solid section with uniform
cross section along its whole length, furnished in straight
1.1 This specification covers wrought heat-resisting alloy
lengths.
UNS N08330 in the form of billets and bars only for reforging.
3.1.2 billet, n—material of solid section with uniform cross
1.2 The values stated in inch-pound units are to be regarded
section along its whole length, furnished in straight lengths.
as standard. The values given in parentheses are mathematical
The typical section is round-cornered square with dimensions
conversions to SI units that are provided for information only
1 1
typically in the range 1 ⁄2 by 1 ⁄2 in. (38 by 38 mm) to 10 by 10
and are not considered standard.
in. (254 by 254 mm).
1.3 This standard does not purport to address all of the
4. Ordering Information
safety concerns, if any, associated with its use. It is the
responsibility of the user of this standard to become familiar
4.1 It is the responsibility of the purchaser to specify all
with all hazards including those identified in the appropriate
requirements that are necessary for material ordered under this
Material Safety Data Sheet (MSDS) for this product/material
specification. Examples of such requirements include, but are
as provided by the manufacturer, to establish appropriate
not limited to, the following:
safety, health, and environmental practices, and determine the
4.1.1 Alloy name or UNS Number.
applicability of regulatory limitations prior to use.
4.1.2 ASTM designation and year of issue.
1.4 This international standard was developed in accor-
4.1.3 Section (round, round-cornered square, etc.).
dance with internationally recognized principles on standard-
4.1.4 Dimensions (diameter or thickness, width and length).
ization established in the Decision on Principles for the
4.1.5 Quantity (weight or number of pieces).
Development of International Standards, Guides and Recom-
4.1.6 Certification—State if certification is required (Sec-
mendations issued by the World Trade Organization Technical
tion 12).
Barriers to Trade (TBT) Committee.
4.1.7 Samples for Product (Check) Analysis—State whether
samples for product (check) analysis should be furnished.
2. Referenced Documents
4.1.8 Purchaser Inspection—If a purchaser wishes to wit-
2.1 ASTM Standards:
ness tests or inspections of material at place of manufacture,
B880 Specification for General Requirements for Chemical
the purchase order must so state indicating which test or
Check Analysis Limits for Nickel, Nickel Alloys and
inspections are to be witnessed.
Cobalt Alloys
5. Chemical Composition
E29 Practice for Using Significant Digits in Test Data to
Determine Conformance with Specifications
5.1 The material shall conform to the requirements as to
E1473 Test Methods for Chemical Analysis of Nickel, Co-
chemical composition specified in Table 1.
balt and High-Temperature Alloys
5.2 If a product (check) analysis is performed by the
purchaser, the material shall conform to the chemistry of Table
3. Terminology
1, subject to the tolerances provided in Specification B880.
3.1 Definitions of Terms Specific to This Standard:
6. Dimensions and Permissible Variations
This specification is under the jurisdiction of ASTM Committee B02 on
6.1 Billets and bars shall conform to the shape and dimen-
Nonferrous Metals and Alloys and is the direct responsibility of Subcommittee
sions specified by the purchaser with a permissible variation of
B02.07 on Refined Nickel and Cobalt and Their Alloys.
65%.
Current edition approved April 1, 2020. Published April 2020. Originally
6.1.1 Material may be conditioned by chipping or grinding
approved in 1970. Last previous edition approved in 2014 as B512 – 04 (2014).
DOI: 10.1520/B0512-20.
to remove injurious surface defects provided the depth of these
For referenced ASTM standards, visit the ASTM website, www.astm.org, or
conditioned areas does not exceed the negative tolerance.
contact ASTM Customer Service at [e-mail]. For Annual Book of ASTM
6.1.2 Dimensions may vary locally beyond these limits by
Standards volume information, refer to the standard’s Document Summary page on
the ASTM website. agreement between p
...

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: B512 − 04 (Reapproved 2014) B512 − 20
Standard Specification for
Nickel-Chromium-Silicon Alloy (UNS N08330) Billets and
Bars
This standard is issued under the fixed designation B512; 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 wrought heat-resisting alloy UNS N08330 in the form of billets and bars only 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 Material Safety Data
Sheet (MSDS) for this product/material as provided by the manufacturer, to establish appropriate safety safety, health, and
healthenvironmental 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:
B880 Specification for General Requirements for Chemical Check Analysis Limits for Nickel, Nickel Alloys and Cobalt Alloys
E29 Practice for Using Significant Digits in Test Data to Determine Conformance with Specifications
E1473 Test Methods for Chemical Analysis of Nickel, Cobalt and High-Temperature Alloys
3. Terminology
3.1 Definitions of Terms Specific to This Standard:
3.1.1 bar, n—material of round solid section with uniform cross section along its whole length, furnished in straight lengths.
3.1.2 billet, n—material of solid section with uniform cross section along its whole length, furnished in straight lengths. The
1 1
typical section is round-cornered square with dimensions typically in the range 1 ⁄2 by 1 ⁄2 in. (38 by 38 mm) to 10 by 10 in. (254
by 254 mm).
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 Alloy name or UNS Number.
4.1.2 ASTM designation and year of issue.
4.1.3 Section (round, round-cornered square, etc.).
4.1.4 Dimensions (diameter or thickness, width and length).
4.1.5 Quantity (weight or number of pieces).
4.1.6 Certification—State if certification is required (Section 12).
4.1.7 Samples for Product (Check) Analysis—State whether samples for product (check) analysis should be furnished.
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 Oct. 1, 2014April 1, 2020. Published October 2014April 2020. Originally approved in 1970. Last previous edition approved in 20092014 as
B512 – 04 (2009).(2014). DOI: 10.1520/B0512-04R14.10.1520/B0512-20.
For referenced ASTM standards, visit the ASTM website, www.astm.org, or contact ASTM Customer Service at [e-mail]. 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
B512 − 20
4.1.8 Purchaser Inspection—If a purchaser wishes to witness tests or inspections of material at place of manufacture, the
purchase order must so state indicating which test or inspections are to be witnessed.
5. Chemical Composition
5.1 The material shall conform to the requirements as to chemical composition specified in Table 1.
5.2 If a product (check) analysis is performed by the purchaser, the material shall conform to the chemistry of Table 1, subject
to the tolerances provided in Specification B880.
6. Dimensions and Permissible Variations
6.1 Billets and bars shall conform to
...