ASTM F1314-18

Standard Specification for Wrought Nitrogen Strengthened 22 Chromium–13 Nickel–5 Manganese–2.5 Molybdenum Stainless Steel Alloy Bar and Wire for Surgical Implants (UNS S20910)

ABSTRACT
This specification covers the chemical, mechanical, and metallurgical requirements for wrought nitrogen strengthened 22chromium-13nickel-5manganese-2.5molybdenum stainless steel alloy bar and wire for surgical implants (UNS S20910). Materials shall be tested and shall conform to chemical requirements such as chemical composition, and product analysis; metallurgical requirements such as inclusion; and mechanical requirements such as dimension, tensile strength, yield strength, elongation, and Brinell hardness.
SCOPE
1.1 This specification covers the chemical, mechanical, and metallurgical requirements for wrought nitrogen strengthened 22 chromium – 13 nickel – 5 manganese – 2.5 molybdenum stainless steel alloy bar and wire for surgical implants.  
1.2 The SI units in this standard are the primary units. The values stated in either primary SI units or secondary inch-pound units are to be regarded separately as standard. The values stated in each system may not be exact equivalents; therefore, each system shall be used independently of each other. Combining values form the two systems may result in non-conformance with the standard.  
1.3 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-Jan-2018
• ICS: 11.040.40 - Implants for surgery, prosthetics and orthotics
• Technical Committee: F04 - Medical and Surgical Materials and Devices
• Drafting Committee: F04.12 - Metallurgical Materials

Relations

• Replaces: ASTM F1314-13ae1 - Standard Specification for Wrought Nitrogen Strengthened 22 Chromium–13 Nickel–5 Manganese–2.5 Molybdenum Stainless Steel Alloy Bar and Wire for Surgical Implants (UNS S20910)
• Effective Date: 01-Feb-2018
• Refers: ASTM A484/A484M-24 - Standard Specification for General Requirements for Stainless Steel Bars, Billets, Shapes, and Forgings
• Effective Date: 01-Jan-2024
• Refers: ASTM E8/E8M-24 - Standard Test Methods for Tension Testing of Metallic Materials
• Effective Date: 01-Jan-2024
• Refers: ASTM E45-18a(2023) - Standard Test Methods for Determining the Inclusion Content of Steel
• Effective Date: 01-Nov-2023
• Refers: ASTM E407-23 - Standard Practice for Microetching Metals and Alloys
• Effective Date: 01-Nov-2023
• Refers: ASTM A484/A484M-23a - Standard Specification for General Requirements for Stainless Steel Bars, Billets, Shapes, and Forgings
• Effective Date: 01-Sep-2023
• Refers: ASTM A484/A484M-23 - Standard Specification for General Requirements for Stainless Steel Bars, Billets, and Forgings
• Effective Date: 01-Mar-2023
• Refers: ASTM A484/A484M-20a - Standard Specification for General Requirements for Stainless Steel Bars, Billets, and Forgings
• Effective Date: 05-May-2020
• Refers: ASTM F138-19 - Standard Specification for Wrought 18Chromium-14Nickel-2.5Molybdenum Stainless Steel Bar and Wire for Surgical Implants (UNS S31673)
• Effective Date: 01-Dec-2019
• Refers: ASTM A484/A484M-19 - Standard Specification for General Requirements for Stainless Steel Bars, Billets, and Forgings
• Effective Date: 01-Sep-2019
• Refers: ASTM A484/A484M-18a - Standard Specification for General Requirements for Stainless Steel Bars, Billets, and Forgings
• Effective Date: 01-Nov-2018
• Refers: ASTM E18-18 - Standard Test Methods for Rockwell Hardness of Metallic Materials
• Effective Date: 01-Jul-2018
• Refers: ASTM A484/A484M-18 - Standard Specification for General Requirements for Stainless Steel Bars, Billets, and Forgings
• Effective Date: 01-Jan-2018
• Refers: ASTM E18-17 - Standard Test Methods for Rockwell Hardness of Metallic Materials
• Effective Date: 01-Jul-2017
• Refers: ASTM E8/E8M-16 - Standard Test Methods for Tension Testing of Metallic Materials
• Effective Date: 15-Jul-2016

Overview

ASTM F1314-18 is the standard specification established by ASTM International covering wrought nitrogen strengthened 22 chromium-13 nickel-5 manganese-2.5 molybdenum stainless steel alloy bar and wire for use in surgical implants (UNS S20910). This international standard sets the requirements for chemical composition, mechanical and metallurgical properties, and quality systems to ensure material safety and performance in medical device applications.

This specification is essential for manufacturers and suppliers producing material for critical biomedical uses, particularly where high corrosion resistance and mechanical strength are required. It follows internationally recognized guidelines for the development of standards, including compatibility with both SI (metric) and inch-pound units.

Key Topics

• Material Composition: Specifies stringent chemistry, including nitrogen strengthening and tight limits on elements such as chromium, nickel, manganese, molybdenum, and residuals, ensuring suitable mechanical and corrosion-resistant properties.
• Mechanical Requirements: Bars and wires made to this standard must meet defined mechanical performance values for tensile strength, yield strength, elongation, and Brinell hardness depending on supplied condition (hot-worked, annealed, cold-worked).
• Metallurgical Properties: Materials must exhibit a fine-grained austenitic microstructure, be free of delta ferrite, chi, and sigma phases, and contain low levels of non-metallic inclusions.
• Testing and Inspection:
  • Chemical analysis per ASTM A751 and E354.
  • Tensile and hardness testing as per ASTM E8/E8M, E10, or E18.
  • Metallographic assessment and grain size measurement.
  • Intergranular corrosion and ultrasonic inspection for specific product forms.
• Quality and Certification: Producers are required to maintain a quality program such as ISO 9001 and provide full certification of compliance and test results with each shipment.

Applications

• Surgical Implants: The specified material is suitable for manufacturing implantable medical devices that come into contact with human tissue and bone. Its composition and processing make it ideal for applications requiring high strength and superior pitting and crevice corrosion resistance.
• Medical Device Manufacturing: Common uses include orthopedic implants, trauma devices, spinal fixation components, and other load-bearing applications in the medical field.
• Forging and Custom Shapes: Both bar and wire can serve as feedstock for further processing, such as forging custom implant designs.
• High-Strength Requirements: When cold worked, this alloy develops significantly higher tensile strength, benefitting devices where extra durability is a primary concern.

The biocompatibility of this alloy has been confirmed through extended clinical use, producing acceptable biological responses similar to established reference materials. However, it is important to match the application with the correct material conditions and to be aware that no implant material is completely free of adverse reactions.

Related Standards

• ASTM F138: Specification for wrought 18 chromium-14 nickel-2.5 molybdenum stainless steel for surgical implants.
• ASTM E8/E8M: Test methods for tension testing of metallic materials.
• ASTM E10, E18: Hardness testing methods.
• ASTM E45, E112, E407: Methods for evaluating inclusion content, grain size, and metallographic analysis.
• ASTM A262: Practices for detecting intergranular corrosion susceptibility.
• AMS 2248: Chemical check analysis limits for corrosion and heat-resistant alloys.
• ISO 6892: Metallic materials - tensile testing at ambient temperature.
• ISO 9001: Quality management systems requirements.
• IEEE/ASTM SI 10: American National Standard for metric practice.

This standard is under the jurisdiction of ASTM Committee F04 on Medical and Surgical Materials and Devices and aligns with international trade principles and standardization processes. For full compliance and up-to-date requirements, always refer to the most recent official ASTM publication.

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:F1314 −18
Standard Specification for
Wrought Nitrogen Strengthened 22 Chromium–13 Nickel–5
Manganese–2.5 Molybdenum Stainless Steel Alloy Bar and
Wire for Surgical Implants (UNS S20910)
This standard is issued under the fixed designation F1314; the number immediately following the designation indicates the year of
original adoption or, in the case of revision, the year of last revision.Anumber in parentheses indicates the year of last reapproval.A
superscript epsilon (´) indicates an editorial change since the last revision or reapproval.
1. Scope* E10Test Method for Brinell Hardness of Metallic Materials
E18Test Methods for Rockwell Hardness of Metallic Ma-
1.1 This specification covers the chemical, mechanical, and
terials
metallurgical requirements for wrought nitrogen strengthened
E29Practice for Using Significant Digits in Test Data to
22 chromium – 13 nickel – 5 manganese – 2.5 molybdenum
Determine Conformance with Specifications
stainless steel alloy bar and wire for surgical implants.
E45Test Methods for Determining the Inclusion Content of
1.2 The SI units in this standard are the primary units. The
Steel
values stated in either primary SI units or secondary inch-
E112Test Methods for Determining Average Grain Size
pound units are to be regarded separately as standard. The
E354 Test Methods for Chemical Analysis of High-
values stated in each system may not be exact equivalents;
Temperature,Electrical,Magnetic,andOtherSimilarIron,
therefore, each system shall be used independently of each
Nickel, and Cobalt Alloys
other. Combining values form the two systems may result in
E407Practice for Microetching Metals and Alloys
non-conformance with the standard.
F138Specification for Wrought 18Chromium-14Nickel-
1.3 This international standard was developed in accor- 2.5MolybdenumStainlessSteelBarandWireforSurgical
dance with internationally recognized principles on standard-
Implants (UNS S31673)
ization established in the Decision on Principles for the F746Test Method for Pitting or Crevice Corrosion of
Development of International Standards, Guides and Recom-
Metallic Surgical Implant Materials
mendations issued by the World Trade Organization Technical IEEE/ASTM SI 10American National Standard for Metric
Barriers to Trade (TBT) Committee.
Practice
2.2 Aerospace Materials Specification:
2. Referenced Documents
AMS 2248Chemical CheckAnalysis Limits, Corrosion and
2.1 ASTM Standards:
Heat Resistant Steels and Alloys, Maraging and Other
A262Practices for Detecting Susceptibility to Intergranular
Highly-Alloyed Steels, and Iron Alloys
Attack in Austenitic Stainless Steels
AMS 2630Inspection, Ultrasonic Product Over 0.5 inch
A484/A484MSpecification for General Requirements for
(12.7 mm) Thick
Stainless Steel Bars, Billets, and Forgings
AMS 2632Ultrasonic Inspection of Thin Materials
A555/A555MSpecification for General Requirements for
2.3 ISO Standards:
Stainless Steel Wire and Wire Rods
ISO 6892Metallic Materials Tensile Testing at Ambient
A751Test Methods, Practices, and Terminology for Chemi-
Temperature
cal Analysis of Steel Products
ISO 9001Quality Management Systems—Requirements
E8/E8MTest Methods for Tension Testing of Metallic Ma-
terials
3. Terminology
3.1 Definitions of Terms Specific to This Standard:
This specification is under the jurisdiction of ASTM Committee F04 on 3.1.1 bar, n—roundbarsandflatsfrom4.75mm[0.1875in.]
Medical and Surgical Materials and Devicesand is the direct responsibility of
to 101.60 mm [4.00 in.] in diameter or thickness (other sizes
Subcommittee F04.12 on Metallurgical Materials.
and shapes by special order).
Current edition approved Feb. 1, 2018. Published March 2018. Originally
ɛ1
approved in 1990. Last previous edition approved in 2013 as F1314–13a . DOI:
10.1520/F1314-18.
2 3
For referenced ASTM standards, visit the ASTM website, www.astm.org, or Available from Society of Automotive Engineers (SAE), 400 Commonwealth
contact ASTM Customer Service at [e-mail]. For Annual Book of ASTM Dr., Warrendale, PA 15096-0001, http://www.sae.org.
Standards volume information, refer to the standard’s Document Summary page on Available fromAmerican National Standards Institute (ANSI), 25 W. 43rd St.,
the ASTM website. 4th Floor, New York, NY 10036, http://www.ansi.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
F1314−18
3.1.2 forging bar, n—as described in 3.1.2 used for produc- 6.1.1 Requirements for the major and minor elemental
tion of forgings, may be furnished in the hot rolled condition. constituents are listed in Table 1. Also listed are important
residualelements.AnalysisforelementsnotlistedinTable1is
3.1.3 lot, n—the total number mill products produced under
not required to verify compliance with this specification.
thesamemeltheatunderthesameconditionsatessentiallythe
6.1.2 Methods and practices relating to chemical analysis
same time.
required by this specification shall be in accordance with Test
3.1.4 wire, n—rounds less than 4.75 mm [0.1875 in.] in
Methods A751.
diameter.
6.2 Product Analysis—The product analysis is either for the
purpose of verifying the composition of a heat or manufactur-
4. Ordering Information
inglotortodeterminevariationsinthecompositionwithinthe
4.1 Inquiriesandordersformaterialunderthisspecification
heat.
shall include the following information:
6.2.1 Acceptance or rejection of a heat or lot of material
4.1.1 Quantity;
may be made by the purchaser on the basis of this product
4.1.2 ASTM designation and date of issue;
analysis.
4.1.3 Mechanical properties (if applicable for special con-
6.2.2 Product analysis tolerances do not broaden the speci-
ditions);
fied heat analysis requirements but cover variations between
4.1.4 Form (bar or wire);
laboratories in the measurement of chemical content. Product
4.1.5 Applicable dimensions including size, thickness,
analysis limits shall be as specified in Table 2.
width, and length (exact, random, or multiples) or drawing
6.2.3 Methods and practices relating to chemical analysis
number;
required by this specification shall be in accordance with Test
4.1.6 Tolerances—unless otherwise specified by purchaser,
Methods E354.
tolerances must meet the requirements of Specification A484/
A484M, A555/A555M, or both, as applicable;
7. Metallurgical Requirements
4.1.7 Condition (see 5.1);
7.1 The material shall contain no delta ferrite, chi, or sigma
4.1.8 Finish (see 5.2);
phases when it is examined metallographically at 100× mag-
4.1.9 Special tests (if any); and
nification in accordance with Practice E407.
4.1.10 Other requirements.
7.2 The microcleanliness of the material, as determined by
5. Materials and Manufacture Practice E45, Method A, except using Plate Ir, on representa-
tive billet or bar samples from the heat shall not exceed the
5.1 Condition—Bar and wire shall be furnished in the
following:
hot-worked, annealed, or cold-worked condition, as specified.
Inclusion A B C D (Globular
5.2 Finish—Barandwireshallbefurnishedbrightannealed,
Type (Sulfide) (Alumina) (Silicate) Oxide)
cold drawn, pickled, ground, or ground and polished, as
Thin 1.5 2.5 2.5 2.5
specified by the purchaser.
Heavy 1.5 1.5 1.5 1.5
6. Chemical Requirements
8. Mechanical Requirements
6.1 Thesupplier’sheatanalysisshallconformtothechemi- 8.1 Tensile Properties:
cal requirements prescribed in Table 1. The supplier shall not
shipmaterialwithchemistryoutsidetherequirementsspecified A
TABLE 2 Product Analysis Tolerances
in Table 1.
Permissible Variation
Under the
Element Minimum Limit or Over
the Maximum Limit,
B
% (Mass/Mass)
TABLE 1 Chemical Composition
Carbon 0.005
Composition, % C
Manganese 0.05
Element
(Mass/Mass)
Phosphorus 0.005
Carbon 0.030 max Sulfur 0.005
Manganese 4.00 to 6.00
Silicon 0.05
Phosphorus 0.025 max Chromium 0.25
Sulfur 0.010 max
Nickel 0.15
Silicon 0.75 max Molybdenum 0.10
C
Chromium 20.50 to 23.50 Nitrogen 0.02 under min;
Nickel 11.50 to 13.50 0.04 over max
Molybdenum 2.00 to 3.00 Niobium 0.05
Nitrogen 0.20 to 0.40 Vanadium 0.03
Niobium 0.10 to 0.30 Copper 0.03
Vanadium 0.10 to 0.30
A
Refer to AMS 2248 for chemical check analysis limits (except nitrogen).
Copper 0.50 max
B
For elements in which only a maximum percentage is indicated, the “under
A
Iron balance
minimum limit” is not applicable.
A C
Approximately equal to the difference of 100 % and the sum percentage of the ThespecifiedrangeforthiselementisnotcoveredbyAMS2248andpermissible
other specified elements. Reporting of the iron difference is not required. variation has been established through industrial practice.
F1314−18
8.1.1 Tensile properties shall be determined in accordance 9.1.1.3 If the purchaser’s selection of units is unclear, the
with Test Methods E8/E8M. units of measure shall be agreed upon between the purchaser
8.1.2 The mechanical properties of test specimens shall and supplier.
conform to the requirements specified in Table 3. 9.1.2 Conversion of Units—If the supplier’s test equipment
does not report in the selected units, the test equipment units
8.2 Hardness:
may be converted to the selected units for certification pur-
8.2.1 Hardness values shall be determined in accordance
poses. Accurate arithmetic conversion and proper use of
with Test Method E10 or Test Methods E18.
significant digits should be observed when performing this
8.2.2 Whendesired,hardnesslimitsmaybespecifiedbythe
conversion. IEEE/ASTMSI10providesguidelinesfortheuse
purchaser.Hardnessdeterminationsshallbemadeonaproduct
of SI units. Annex A of that standard provides conversion
cross section, midway between the center and surface, if the
tables and Annex B provides rules for conversion and signifi-
cross section is adequate.
cance.
8.3 Number of Tests—Bar, Forging Bar, Shapes and Wire:
10. Special Tests
8.3.1 Perform tension testing per Test Methods E8/E8M.
Should any of the test specimens not meet the specified
10.1 Bar and wire conforming to this specification shall be
requirements, test two additional test pieces representative of
capab
...

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.
´1
Designation: F1314 − 13a F1314 − 18
Standard Specification for
Wrought Nitrogen Strengthened 22 Chromium–13 Nickel–5
Manganese–2.5 Molybdenum Stainless Steel Alloy Bar and
Wire for Surgical Implants (UNS S20910)
This standard is issued under the fixed designation F1314; 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.
ε NOTE—The designation was corrected editorially in December 2013.
1. Scope*
1.1 This specification covers the chemical, mechanical, and metallurgical requirements for wrought nitrogen strengthened 22
chromium – 13 nickel – 5 manganese – 2.5 molybdenum stainless steel alloy bar and wire for surgical implants.
1.2 The SI units in this standard are the primary units. The values stated in either primary SI units or secondary inch-pound units
are to be regarded separately as standard. The values stated in each system may not be exact equivalents; therefore, each system
shall be used independently of theeach other. Combining values fromform the two systems may result in non-conformance with
the standard.
1.3 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
A484/A484M Specification for General Requirements for Stainless Steel Bars, Billets, and Forgings
A555/A555M Specification for General Requirements for Stainless Steel Wire and Wire Rods
A751 Test Methods, Practices, and Terminology for Chemical Analysis of Steel Products
E8/E8M Test Methods for Tension Testing of Metallic Materials
E10 Test Method for Brinell Hardness of Metallic Materials
E18 Test Methods for Rockwell Hardness of Metallic Materials
E29 Practice for Using Significant Digits in Test Data to Determine Conformance with Specifications
E45 Test Methods for Determining the Inclusion Content of Steel
E112 Test Methods for Determining Average Grain Size
E354 Test Methods for Chemical Analysis of High-Temperature, Electrical, Magnetic, and Other Similar Iron, Nickel, and
Cobalt Alloys
E407 Practice for Microetching Metals and Alloys
F138 Specification for Wrought 18Chromium-14Nickel-2.5Molybdenum Stainless Steel Bar and Wire for Surgical Implants
(UNS S31673)
F746 Test Method for Pitting or Crevice Corrosion of Metallic Surgical Implant Materials
IEEE/ASTM SI 10 American National Standard for Metric Practice
2.2 Aerospace Materials Specification:
AMS 2248 Chemical Check Analysis Limits, Corrosion and Heat Resistant Steels and Alloys, Maraging and Other
Highly-Alloyed Steels, and Iron Alloys
This specification is under the jurisdiction of ASTM Committee F04 on Medical and Surgical Materials and Devices and is the direct responsibility of Subcommittee
F04.12 on Metallurgical Materials.
Current edition approved Oct. 1, 2013Feb. 1, 2018. Published November 2013March 2018. Originally approved in 1990. Last previous edition approved in 2013 as
ɛ1
F1314 – 13.F1314 – 13a . DOI: 10.1520/F1314-13AE01.10.1520/F1314-18.
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.
Available from Society of Automotive Engineers (SAE), 400 Commonwealth Dr., Warrendale, PA 15096-0001, http://www.sae.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
F1314 − 18
AMS 2630 Inspection, Ultrasonic Product Over 0.5 inch (12.7 mm) Thick
AMS 2632 Ultrasonic Inspection of Thin Materials
2.3 ISO Standards:
ISO 6892 Metallic Materials Tensile Testing at Ambient Temperature
ISO 9001 Quality Management Systems—Requirements
3. Terminology
3.1 Definitions of Terms Specific to This Standard:
3.1.1 bar, n—round bars and flats from 0.1875 in. [4.75 mm] to 4.00 in. [101.60 mm]4.75 mm [0.1875 in.] to 101.60 mm [4.00
in.] in diameter or thickness (other sizes and shapes by special order).
3.1.2 forging bar, n—as described in 3.1.2 used for production of forgings, may be furnished in the hot rolled condition.
3.1.3 lot, n—the total number mill products produced under the same melt heat under the same conditions at essentially the same
time.
3.1.4 wire, n—rounds less than 0.1875 in. [4.75 mm]4.75 mm [0.1875 in.] in diameter.
4. Ordering Information
4.1 Inquiries and orders for material under this specification shall include the following information:
4.1.1 Quantity;
4.1.2 ASTM designation and date of issue;
4.1.3 Mechanical properties (if applicable for special conditions);
4.1.4 Form (bar or wire);
4.1.5 Applicable dimensions including size, thickness, width, and length (exact, random, or multiples) or drawing number;
4.1.6 Tolerances—unless otherwise specified by purchaser, tolerances must meet the requirements of Specification A484/
A484M, A555/A555M, or both, as applicable;
4.1.7 Condition (see 5.1);
4.1.8 Finish (see 5.2);
4.1.9 Special tests (if any); and
4.1.10 Other requirements.
5. Materials and Manufacture
5.1 Condition—Bar and wire shall be furnished in the hot-worked, annealed, or cold-worked condition, as specified.
5.2 Finish—Bar and wire shall be furnished bright annealed, cold drawn, pickled, ground, or ground and polished, as specified
by the purchaser.
6. Chemical Requirements
6.1 The supplier’s heat analysis shall conform to the chemical requirements prescribed in Table 1. The supplier shall not ship
material with chemistry outside the requirements specified in Table 1.
TABLE 1 Chemical Composition
Composition, %
Element
(Mass/Mass)
Carbon 0.030 max
Manganese 4.00 to 6.00
Phosphorus 0.025 max
Sulfur 0.010 max
Silicon 0.75 max
Chromium 20.50 to 23.50
Nickel 11.50 to 13.50
Molybdenum 2.00 to 3.00
Nitrogen 0.20 to 0.40
Niobium 0.10 to 0.30
Vanadium 0.10 to 0.30
Copper 0.50 max
A
Iron balance
A
Approximately equal to the difference of 100 % and the sum percentage of the
other specified elements. Reporting of the iron difference is not required.
Available from American National Standards Institute (ANSI), 25 W. 43rd St., 4th Floor, New York, NY 10036, http://www.ansi.org.
F1314 − 18
6.1.1 Requirements for the major and minor elemental constituents are listed in Table 1. Also listed are important residual
elements. Analysis for elements not listed in Table 1 is not required to verify compliance with this specification.
6.1.2 Methods and practices relating to chemical analysis required by this specification shall be in accordance with Test Methods
A751.
6.2 Product Analysis—The product analysis is either for the purpose of verifying the composition of a heat or manufacturing
lot or to determine variations in the composition within the heat.
6.2.1 Acceptance or rejection of a heat or lot of material may be made by the purchaser on the basis of this product analysis.
6.2.2 Product analysis tolerances do not broaden the specified heat analysis requirements but cover variations between
laboratories in the measurement of chemical content. Product analysis limits shall be as specified in Table 2.
6.2.3 Methods and practices relating to chemical analysis required by this specification shall be in accordance with Test Methods
E354.
7. Metallurgical Requirements
7.1 The material shall contain no delta ferrite, chi, or sigma phases when it is examined metallographically at 100×
magnification in accordance with Practice E407.
7.2 The microcleanliness of the material, as determined by Practice E45, Method A, except using Plate Ir, on representative
billet or bar samples from the heat shall not exceed the following:
Inclusion A B C D (Globular
Type (Sulfide) (Alumina) (Silicate) Oxide)
Thin 1.5 2.5 2.5 2.5
Heavy 1.5 1.5 1.5 1.5
8. Mechanical Requirements
8.1 Tensile Properties:
8.1.1 Tensile properties shall be determined in accordance with Test Methods E8/E8M.
8.1.2 The mechanical properties of test specimens shall conform to the requirements specified in Table 3.
8.2 Hardness:
8.2.1 Hardness values shall be determined in accordance with Test Method E10 or Test Methods E18.
8.2.2 When desired, hardness limits may be specified by the purchaser. Hardness determinations shall be made on a product
cross section, midway between the center and surface, if the cross section is adequate.
8.3 Number of Tests—Bar, Forging Bar, Shapes and Wire:
8.3.1 Perform tension testing per Test Methods E8/E8M. Should any of the test specimens not meet the specified requirements,
test two additional test pieces representative of the same lot, in the same manner, for each failed test piece. The lot shall be
considered in compliance only if all additional test pieces meet the specified requirements.
A
TABLE 2 Product Analysis Tolerances
Permissible Variation
Under the
Element Minimum Limit or Over
the Maximum Limit,
B
% (Mass/Mass)
Carbon 0.005
C
Manganese 0.05
Phosphorus 0.005
Sulfur 0.005
Silicon 0.05
Chromium 0.25
Nickel 0.15
Molybdenum 0.10
C
Nitrogen 0.02 under min;
0.04 over max
Niobium 0.05
Vanadium 0.03
Copper 0.03
A
Refer to AMS 2248 for chemical check analysis limits (except nitrogen).
B
For elements in which only a maximum percentage is indicated, the “under
minimum limit” is not applicable.
C
The specified range for this element is not covered by AMS 2248 and permissible
variation has been established through industrial practice.
F1314 − 18
TABLE 3 Mechanical Requirements, Bar and Wire
Ultimate Tensile Yield Strength
A B
Diameter or Thickness,
Elongation Brinell Hardness,
Condition Strength, min, (0.2 % Offset),
min, % max, HB
in. [mm]
psi [MPa] min, psi [MPa]
C D
Hot-worked Up to 2 [50.8] , incl . . . 325
Annealed All 100 000 [690] 55 000 [380] 35 .
Cold-worked 0.063 to 0.750 150 000 [1035] 125 000 [862] 12 .
[1.59 to
D
19.1] , incl
TABLE 3 Mechanical Requirements, Bar and Wire
Ultimate Tensile Yield Strength
A B
Diameter or Thickness,
Elongation Brinell Hardness,
Condition Strength, min, (0.2 % Offset),
mm [in.] min, % max, HB
MPa [psi] min, MPa [psi]
C D
Hot-worked Up to 50.8 [2], incl . . . 325
Annealed All 690 [100 000] 380 [55 000] 35 .
Cold-worked 1.59 to 19.1 1035 [150 000] 862 [125 000] 12 .
[0.063 to
D
0.750], incl
A
Elongation of material 0.063 in. [1.6 mm]1.6 mm [0.063 in.] or greater in diameter (D) or width (W) shall be measured using a gauge length of 2 in. 50 mm [2 in.] or 4D
or 4W. The gauge length shall be reported with the test results. The method for determin
...