ASTM F3607-22
(Specification)Standard Specification for Additive Manufacturing – Finished Part Properties – Maraging Steel via Powder Bed Fusion
Standard Specification for Additive Manufacturing – Finished Part Properties – Maraging Steel via Powder Bed Fusion
SCOPE
1.1 This specification covers additive manufacturing of parts via full-melt laser beam powder bed fusion (PBF-LB) processing of maraging steel alloys. Parts made using this processing method are typically used in applications that require mechanical properties similar to wrought products, either as fabricated or heat treated. Products built to this specification may require additional post-processing in the form of machining, polishing, etc., to meet necessary surface finish and dimensional requirements.
1.2 Maraging steel (MS) is a class of precipitation hardened steel, where aging heat treatment is used to form precipitates and, consequently, achieve significantly increased hardness and strength. This specification focuses specifically on 300 grade maraging steel, which corresponds to UNS K93120 and EN1.2709. MS grade 300 has higher concentrations of cobalt and titanium than lower grades.
1.3 This specification is intended for the use of purchasers or producers, or both, of additively manufactured maraging steel parts for defining the requirements and ensuring part properties.
1.4 Users are advised to use this specification as a basis for obtaining parts that will meet the minimum acceptance requirements established and revised by consensus of committee members.
1.5 User requirements considered more stringent may be met by the addition to the purchase order of one or more supplementary requirements, which include, but are not limited to, those listed in Supplementary Requirements in Sections S1 to S3.
1.6 The values stated in SI units are to be regarded as standard. All units of measure included in this guide are accepted for use with the SI.
1.7 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 establish appropriate safety, health, and environmental practices and determine the applicability of regulatory limitations prior to use.
1.8 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
- 30-Nov-2022
- Technical Committee
- F42 - Additive Manufacturing Technologies
- Drafting Committee
- F42.05 - Materials and Processes
Relations
- Effective Date
- 01-Apr-2024
- Effective Date
- 01-Mar-2024
- Effective Date
- 01-Jan-2024
- Effective Date
- 15-Nov-2023
- Effective Date
- 01-Nov-2023
- Effective Date
- 01-Oct-2023
- Refers
ASTM B213-20 - Standard Test Methods for Flow Rate of Metal Powders Using the Hall Flowmeter Funnel - Effective Date
- 01-Apr-2020
- Effective Date
- 01-Mar-2020
- Effective Date
- 01-Jan-2020
- Effective Date
- 01-Jan-2020
- Refers
ASTM E2762-10(2020) - Standard Practice for Sampling a Stream of Product by Variables Indexed by AQL - Effective Date
- 01-Jan-2020
- Effective Date
- 01-Sep-2019
- Effective Date
- 01-Nov-2018
- Effective Date
- 01-Nov-2018
- Effective Date
- 01-Jul-2018
Overview
ASTM F3607-22 establishes a standard specification for the additive manufacturing (AM) of parts made from 300 grade maraging steel using full-melt laser beam powder bed fusion (PBF-LB) processing. This standard provides requirements for ensuring that finished parts achieve mechanical properties comparable to traditional, wrought maraging steel, either in the as-fabricated or heat-treated state. The document addresses various process aspects, including powder material controls, machine qualification, post-processing, and quality assurance, to guide both purchasers and producers in obtaining reliable, high-quality AM maraging steel parts.
Maraging steel is a precipitation-hardened alloy, achieving high strength and hardness after aging heat treatment. Grade 300 maraging steel (UNS K93120, EN1.2709) boasts enhanced cobalt and titanium content, resulting in superior mechanical properties suitable for demanding applications.
Key Topics
Material and Process Controls
- Defines requirements for powder feedstock, including batch control and powder specifications.
- Addresses mixing of virgin and recycled powder under controlled conditions, ensuring consistent part quality.
- Stipulates machine qualification procedures to ensure reliable and repeatable PBF-LB processes.
Part Conditions and Post-Processing
- Details multiple accepted material conditions: As Built (AB), Solution Annealed (SA), Aged (AGED), and Hot Isostatic Pressed (HIP).
- Specifies heat treatments like solution annealing and aging for achieving target mechanical properties.
- Permits post-processing such as machining and polishing to meet specific surface finish and dimensional requirements.
Mechanical Properties and Testing
- Sets minimum mechanical property requirements for tensile strength, yield strength, elongation, and hardness.
- Calls for comprehensive mechanical testing per ASTM and ISO standards, ensuring parts meet specified performance.
Quality Assurance
- Requires manufacturers and powder suppliers to maintain recognized quality management systems (e.g., ISO 9001, AS9100).
- Mandates inspection, non-destructive evaluation (NDE), and process documentation to guarantee traceability and reliability.
Applications
300 grade maraging steel parts produced by PBF-LB following ASTM F3607-22 are valued in industries where high strength, toughness, and consistent quality are critical. Typical applications include:
- Aerospace: Structural components requiring excellent mechanical performance and reduced weight.
- Tooling: Production of high-strength molds, dies, and inserts with complex geometries only possible through additive manufacturing.
- Defense: Components subjected to dynamic loading or requiring superior fracture toughness.
- Automotive and Motorsports: Custom parts and prototypes benefiting from rapid production and tailored alloy properties.
The standard ensures that AM parts are suitable for end-use in critical sectors, providing guidelines for mechanical performance, inspection, and quality assurance.
Related Standards
ASTM F3607-22 references several key documents to ensure compatibility and comprehensive coverage across the AM process:
- ASTM A579/A579M: Specification for superstrength alloy steel forgings, related to maraging steel grade compositions.
- ISO/ASTM 52900: General terminology for additive manufacturing.
- ISO/ASTM 52901: Requirements for purchased additively manufactured parts.
- ISO/ASTM 52904: Guidance for metal powder bed fusion processes.
- AMS 2759/3: Standards for heat treatment of precipitation-hardening and maraging steels.
- ASQ C1, ISO 9001, AS9100, ISO 13485: Quality management system requirements for manufacturing consistency and process traceability.
Additional referenced test methods cover hardness (ASTM E10, E18, E92; ISO 6506-1, 6507-1, 6508), tensile testing (ASTM E8/E8M), density measurement, fatigue, and non-destructive evaluation, providing a thorough framework for performance validation.
Keywords: ASTM F3607-22, additive manufacturing, maraging steel, powder bed fusion, PBF-LB, mechanical properties, 300 grade, heat treatment, post-processing, quality assurance, aerospace components, AM part specification.
Frequently Asked Questions
ASTM F3607-22 is a technical specification published by ASTM International. Its full title is "Standard Specification for Additive Manufacturing – Finished Part Properties – Maraging Steel via Powder Bed Fusion". This standard covers: SCOPE 1.1 This specification covers additive manufacturing of parts via full-melt laser beam powder bed fusion (PBF-LB) processing of maraging steel alloys. Parts made using this processing method are typically used in applications that require mechanical properties similar to wrought products, either as fabricated or heat treated. Products built to this specification may require additional post-processing in the form of machining, polishing, etc., to meet necessary surface finish and dimensional requirements. 1.2 Maraging steel (MS) is a class of precipitation hardened steel, where aging heat treatment is used to form precipitates and, consequently, achieve significantly increased hardness and strength. This specification focuses specifically on 300 grade maraging steel, which corresponds to UNS K93120 and EN1.2709. MS grade 300 has higher concentrations of cobalt and titanium than lower grades. 1.3 This specification is intended for the use of purchasers or producers, or both, of additively manufactured maraging steel parts for defining the requirements and ensuring part properties. 1.4 Users are advised to use this specification as a basis for obtaining parts that will meet the minimum acceptance requirements established and revised by consensus of committee members. 1.5 User requirements considered more stringent may be met by the addition to the purchase order of one or more supplementary requirements, which include, but are not limited to, those listed in Supplementary Requirements in Sections S1 to S3. 1.6 The values stated in SI units are to be regarded as standard. All units of measure included in this guide are accepted for use with the SI. 1.7 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 establish appropriate safety, health, and environmental practices and determine the applicability of regulatory limitations prior to use. 1.8 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.
SCOPE 1.1 This specification covers additive manufacturing of parts via full-melt laser beam powder bed fusion (PBF-LB) processing of maraging steel alloys. Parts made using this processing method are typically used in applications that require mechanical properties similar to wrought products, either as fabricated or heat treated. Products built to this specification may require additional post-processing in the form of machining, polishing, etc., to meet necessary surface finish and dimensional requirements. 1.2 Maraging steel (MS) is a class of precipitation hardened steel, where aging heat treatment is used to form precipitates and, consequently, achieve significantly increased hardness and strength. This specification focuses specifically on 300 grade maraging steel, which corresponds to UNS K93120 and EN1.2709. MS grade 300 has higher concentrations of cobalt and titanium than lower grades. 1.3 This specification is intended for the use of purchasers or producers, or both, of additively manufactured maraging steel parts for defining the requirements and ensuring part properties. 1.4 Users are advised to use this specification as a basis for obtaining parts that will meet the minimum acceptance requirements established and revised by consensus of committee members. 1.5 User requirements considered more stringent may be met by the addition to the purchase order of one or more supplementary requirements, which include, but are not limited to, those listed in Supplementary Requirements in Sections S1 to S3. 1.6 The values stated in SI units are to be regarded as standard. All units of measure included in this guide are accepted for use with the SI. 1.7 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 establish appropriate safety, health, and environmental practices and determine the applicability of regulatory limitations prior to use. 1.8 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.
ASTM F3607-22 has the following relationships with other standards: It is inter standard links to ASTM E23-24, ASTM A1080/A1080M-24, ASTM E8/E8M-24, ASTM E647-23b, ASTM E407-23, ASTM D3951-18(2023), ASTM B213-20, ASTM A579/A579M-20, ASTM E1820-20e1, ASTM E1820-20, ASTM E2762-10(2020), ASTM A1080/A1080M-19, ASTM E1820-18ae1, ASTM E1820-18a, ASTM E18-18. Understanding these relationships helps ensure you are using the most current and applicable version of the standard.
ASTM F3607-22 is available in PDF format for immediate download after purchase. The document can be added to your cart and obtained through the secure checkout process. Digital delivery ensures instant access to the complete standard document.
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: F3607 − 22
Standard Specification for
Additive Manufacturing – Finished Part Properties –
Maraging Steel via Powder Bed Fusion
This standard is issued under the fixed designation F3607; 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 responsibility of the user of this standard to establish appro-
priate safety, health, and environmental practices and deter-
1.1 This specification covers additive manufacturing of
mine the applicability of regulatory limitations prior to use.
parts via full-melt laser beam powder bed fusion (PBF-LB)
1.8 This international standard was developed in accor-
processing of maraging steel alloys. Parts made using this
dance with internationally recognized principles on standard-
processing method are typically used in applications that
ization established in the Decision on Principles for the
require mechanical properties similar to wrought products,
Development of International Standards, Guides and Recom-
either as fabricated or heat treated. Products built to this
mendations issued by the World Trade Organization Technical
specification may require additional post-processing in the
Barriers to Trade (TBT) Committee.
form of machining, polishing, etc., to meet necessary surface
finish and dimensional requirements.
2. Referenced Documents
1.2 Maraging steel (MS) is a class of precipitation hardened
2.1 ASTM Standards:
steel, where aging heat treatment is used to form precipitates
A262 Practices for Detecting Susceptibility to Intergranular
and, consequently, achieve significantly increased hardness and
Attack in Austenitic Stainless Steels
strength. This specification focuses specifically on 300 grade
A579/A579M Specification for Superstrength Alloy Steel
maraging steel, which corresponds to UNS K93120 and
Forgings
EN1.2709. MS grade 300 has higher concentrations of cobalt
A1080/A1080M Practice for Hot Isostatic Pressing of Steel,
and titanium than lower grades.
Stainless Steel, and Related Alloy Castings
1.3 This specification is intended for the use of purchasers
B213 Test Methods for Flow Rate of Metal Powders Using
or producers, or both, of additively manufactured maraging
the Hall Flowmeter Funnel
steel parts for defining the requirements and ensuring part
B311 Test Method for Density of Powder Metallurgy (PM)
properties.
Materials Containing Less Than Two Percent Porosity
B769 Test Method for Shear Testing of Aluminum Alloys
1.4 Users are advised to use this specification as a basis for
obtaining parts that will meet the minimum acceptance require- B855 Test Method for Volumetric Flow Rate of Metal
Powders Using the Arnold Meter and Hall Flowmeter
ments established and revised by consensus of committee
members. Funnel
B964 Test Methods for Flow Rate of Metal Powders Using
1.5 User requirements considered more stringent may be
the Carney Funnel
met by the addition to the purchase order of one or more
D3951 Practice for Commercial Packaging
supplementary requirements, which include, but are not limited
E3 Guide for Preparation of Metallographic Specimens
to, those listed in Supplementary Requirements in Sections S1
E8/E8M Test Methods for Tension Testing of Metallic Ma-
to S3.
terials
1.6 The values stated in SI units are to be regarded as
E9 Test Methods of Compression Testing of Metallic Mate-
standard. All units of measure included in this guide are
rials at Room Temperature
accepted for use with the SI.
E10 Test Method for Brinell Hardness of Metallic Materials
E18 Test Methods for Rockwell Hardness of Metallic Ma-
1.7 This standard does not purport to address all of the
safety concerns, if any, associated with its use. It is the terials
This specification is under the jurisdiction of ASTM Committee F42 on
Additive Manufacturing Technologies and is the direct responsibility of Subcom- For referenced ASTM standards, visit the ASTM website, www.astm.org, or
mittee F42.05 on Materials and Processes. contact ASTM Customer Service at service@astm.org. For Annual Book of ASTM
Current edition approved Dec. 1, 2022. Published September 2023. DOI: Standards volume information, refer to the standard’s Document Summary page on
10.1520/F3607-22. the ASTM website.
Copyright © ASTM International, 100 Barr Harbor Drive, PO Box C700, West Conshohocken, PA 19428-2959. United States
F3607 − 22
E23 Test Methods for Notched Bar Impact Testing of Me- Qualifying machine operators of laser metal powder bed
tallic Materials fusion machines and equipment used in aerospace appli-
E29 Practice for Using Significant Digits in Test Data to cations
Determine Conformance with Specifications 2.3 ASQ Standard:
E92 Test Methods for Vickers Hardness and Knoop Hard-
ASQ C1 Specification of General Requirements for a Qual-
ness of Metallic Materials ity Program
E140 Hardness Conversion Tables for Metals Relationship
2.4 ISO Standards:
Among Brinell Hardness, Vickers Hardness, Rockwell
ISO 6506-1 Metallic materials – Brinell hardness test – Part
Hardness, Superficial Hardness, Knoop Hardness, Sclero-
1: Test method
scope Hardness, and Leeb Hardness
ISO 6507-1 Metallic materials – Vickers hardness test – Part
E238 Test Method for Pin-Type Bearing Test of Metallic
1: Test method
Materials
ISO 6508 Metallic materials – Rockwell hardness test – Part
E353 Test Methods for Chemical Analysis of Stainless,
1: Test method (scales A, B, C, D, E, F, G, H, K, N, T)
Heat-Resisting, Maraging, and Other Similar Chromium-
ISO 9001 Quality management system – Requirements
Nickel-Iron Alloys
ISO 13485 Medical devices – Quality management systems
E399 Test Method for Linear-Elastic Plane-Strain Fracture
– Requirements for regulatory purposes
Toughness of Metallic Materials
2.5 SAE Standards:
E407 Practice for Microetching Metals and Alloys
AMS 2759/3 Heat Treatment, Precipitation-Hardening
E466 Practice for Conducting Force Controlled Constant
Corrosion-Resistant, Maraging, and Secondary Hardening
Amplitude Axial Fatigue Tests of Metallic Materials
Steel Parts
E606 Test Method for Strain-Controlled Fatigue Testing
AS 9100 Quality Management Systems – Requirements for
E647 Test Method for Measurement of Fatigue Crack
Aviation, Space and Defense Organizations
Growth Rates
2.6 ASME Standard:
E1417 Practice for Liquid Penetrant Testing
ASME B46.1 Surface Texture
E1742 Practice for Radiographic Examination
E1820 Test Method for Measurement of Fracture Toughness 3. Terminology
E2234 Practice for Sampling a Stream of Product by Attri-
3.1 Definitions:
butes Indexed by AQL
3.1.1 Terminology relating to additive manufacturing in
E2762 Practice for Sampling a Stream of Product by Vari-
Terminology ISO/ASTM 52900 shall apply.
ables Indexed by AQL
3.1.2 Terminology relating to coordinate systems in Termi-
F2924 Specification for Additive Manufacturing Titanium-6
nology ISO/ASTM 52921 shall apply.
Aluminum-4 Vanadium with Powder Bed Fusion
3.1.3 Terminology relating to the ordering of additive manu-
F2971 Practice for Reporting Data for Test Specimens Pre-
facturing parts in ISO/ASTM 52901 shall apply.
pared by Additive Manufacturing
3.1.4 Terminology in Specification F2924 shall apply.
F3122 Guide for Evaluating Mechanical Properties of Metal
Materials Made via Additive Manufacturing Processes
4. Condition
G1 Practice for Preparing, Cleaning, and Evaluating Corro-
4.1 Unless otherwise specified herein, all conditions shall
sion Test Specimens
meet the requirements in each section of this standard.
2.2 ISO/ASTM Standards:
4.1.1 Condition SA parts shall be solution annealed in
52900 Terminology for Additive Manufacturing – General
accordance with Section 15.
Principles – Terminology
4.1.2 Condition HIP parts shall be hot isostatically pressed
52901 Guide for Additive Manufacturing – General Prin-
in accordance with Section 16.
ciples – Requirements for Purchased AM Parts
4.1.3 Condition AGED parts shall be subject to an aging
52904 Additive Manufacturing – Process Characteristics and
treatment in accordance with Section 15.
Performance – Practice for Metal Powder Bed Fusion
4.1.4 The purchaser may specify multiple conditions on the
Process to Meet Critical Applications
purchase order such as Condition SA/AGED or SA/HIP.
52921 Terminology for Additive Manufacturing – Coordi-
nate Systems and Methodologies
52930 Additive manufacturing – Qualification principles – Available from American Society for Quality (ASQ), 600 N. Plankinton Ave.,
Milwaukee, WI 53203, http://www.asq.org.
Installation, operation and performance (IQ/OQ/PQ) of
Available from International Organization for Standardization (ISO), ISO
PBF-LB equipment
Central Secretariat, Chemin de Blandonnet 8, CP 401, 1214 Vernier, Geneva,
52941 Additive manufacturing – System performance and
Switzerland, https://www.iso.org.
Available from SAE International (SAE), 400 Commonwealth Dr., Warrendale,
reliability – Acceptance tests for laser metal powder-bed
PA 15096, http://www.sae.org.
fusion machines for metallic materials for aerospace
Available from American Society of Mechanical Engineers (ASME), ASME
application
International Headquarters, Two Park Ave., New York, NY 10016-5990, http://
52942 Additive manufacturing – Qualification principles – www.asme.org.
F3607 − 22
4.1.5 Condition AB parts indicate as built condition and tation shall be 12 in the Z direction, 2 in the X direction, 2 in
shall not have any heat treatment applied. the Y direction located within the XY build envelope intended
for part production.
4.2 Table 1 provides guidance on controls by condition.
8.4.1 Tension test specimens shall meet the requirements in
Section 13 after machining to Test Methods E8/E8M dimen-
5. Ordering Information
sions.
5.1 Parts shall be ordered in accordance with ISO/ASTM
8.4.2 Density test specimens shall meet the requirements in
52901 to a specified material condition.
Section 12.
5.2 Supplementary requirements such as those listed in the
8.4.3 Chemical composition shall meet the requirements in
Supplementary Requirements section shall be stated on the
Section 11.
purchase order.
8.5 Upon successful completion of 8.4, the machine shall be
considered qualified. Changes to the key process variables
6. Manufacturing Plan
require re-qualification in accordance with Section 8.
6.1 Parts manufactured to this specification shall have a
manufacturing plan in accordance with Practice ISO/ASTM
9. Personnel Training Requirements
52904.
9.1 Build programmers and machine operators as defined in
ISO/ASTM 52904 shall be trained in accordance with ISO/
7. Feedstock and Powder Batches
ASTM 52942 and ISO/ASTM 52904.
7.1 Parts manufactured to this specification shall control
feedstock and powder batches in accordance with Practice
10. Process
ISO/ASTM 52904.
10.1 Parts manufactured to this specification shall meet the
7.1.1 The part manufacturer shall flow-down powder speci-
requirements of ISO/ASTM 52904 for:
fications to their powder vendor and have receiving procedures
that ensure the powder meets the requirements in ISO/ASTM 10.1.1 Control of machine operating system software,
52904. 10.1.2 Digital data configuration control, and
7.1.2 Virgin and used powder may be mixed to produce
10.1.3 External (to the PBF-LB process) environment con-
parts. Used powder shall meet the requirements of Practice trol.
ISO/ASTM 52904.
10.2 Permissible parameter or process changes and extent of
7.1.3 In powder bed fusion machines, the feedstock should
external intervention during the build cycle shall be identified
have a flow rate that is optimized for each process. The powder
in the manufacturing plan. All process changes shall be
flow rate shall be measured in accordance with Test Methods
monitored and recorded. When agreed to by the purchaser,
B964, B213, or B855.
minor changes to the manufacturing plan may be made without
requalification.
8. Machine Qualification
10.3 Post-processing operations may be used to achieve the
8.1 All machines producing parts shall be within acceptance
desired shape, size, surface finish, or other part properties. The
limits defined in ISO/ASTM 52941.
post-processing operations shall be agreed upon by the part
8.2 Key process variables shall be determined in accordance
supplier and purchaser.
with ISO/ASTM 52930.
11. Chemical Composition Evaluation
8.3 When the process can meet the microstructure density
requirements in Section 12, the process shall be fixed with no
11.1 Chemical composition of as-built parts shall conform
additional changes to key process variables under process
to the requirements specified in Table 2. Chemical composi-
controls in ISO/ASTM 52904.
tions shall be determined in accordance with the methods in
8.4 Initial machine and material qualification shall consist Test Methods E353.
of three builds each with a minimum of 16 tension test 11.1.1 Analysis for elements not listed in Table 2 is not
specimens and 4 density test specimens. Test specimen orien- required to certify compliance with this specification.
TABLE 1 Guidance for Controls by Material Condition
Consolidated
Manufacturing Powder Post- Mechanical Quality
Thermal Powder Use Material Microstructure
Conditions Plan Contamination Processing Properties Program
Post-Process Controlled Chemistry Controlled
Required Controlled Controlled Controlled Required
Controlled
AGED Aging Yes Yes Yes Yes Yes Yes Yes Yes
SA Solution Yes Yes Yes Yes Yes Yes Yes Yes
Annealed
HIP Hot Isostatic Yes Yes Yes Yes Yes Yes Yes Yes
Pressed
AB none Yes Yes Yes No Yes Yes Yes Yes
F3607 − 22
TABLE 2 Chemical Composition Requirements (wt. %) TABLE 3 Minimum Tensile Requirements for as Delivered
A A
(Specification A579/A579M, grade 73) Condition
Material As-built Material Tensile Yield
Elongation
Strength Strength
Aluminum, Al 0.050–0.15 %
(%),
Condition MPa (ksi), MPa (ksi),
Boron, B # 0.001 %
X, Y and Z
X, Y and Z X, Y and Z
Carbon, C # 0.030 %
Directions
Directions Directions
Cobalt, Co 8.0–9.5 %
B
AB 1050 (152) 800 (116) 10
Iron, Fe 65.1–68.8 %
B
Manganese, Mn # 0.10 % SA 1050 (152) 800 (116) 10
C
AGED 1930 (280) 1895 (275) 2
Molybdenum, Mo 4.6–5.2 %
C
Nickel, Ni 18–19 % SA/AGED 1930 (280) 1895 (275) 2
Phosphorus, P # 0.010 % HIP not specified not specified not specified
Silicon, Si # 0.10 %
A
A gauge length corresponding to ISO 6892-1 may be used when agreed upon by
Sulfur, S # 0.010 %
the part supplier and purchaser.
Titanium, Ti 0.50–0.80 % B
Mechanical properties were taken from research literature.
A C
Other elements need not be reported unless the concentration level is greater Mechanical properties are consistent with Specification A579/A579M for Type 7,
Grade 73 maraging steel.
than 0.1 % each, or 0.4 % total. Intentional elemental additions other than those
specified in Table 1 are not permitted. All commercial metals contain small
amounts of elements other than those which are specified. It is neither practical nor
necessary to specify limits for unspecified elements, whether residual elements or
trace elements that can be present. The producer is permitted to analyze for
unspecified elements and is permitted to report such analyses. The presence of an
unspecified element and the reporting of an analysis for that element shall not be
13.4 Tension test specimens shall be prepared in accordance
a basis for rejection.
with Test Methods E8/E8M, either before or after thermal
post-processing as agreed upon by the part supplier and
purchaser.
NOTE 1—Guide F3122 provides guidance on evaluating mechanical
properties. Tensile specimen geometry is often chosen to be representative
11.2 The chemical composition requirements in this speci-
of the produced part.
fication are similar to those in Specification A579/A579M
13.5 Specimens used for tension testing shall be machined
Type 7, Grade 73 or the UNS designation K93120 and
from bulk deposition, machined from bars, or taken from near
EN1.2709.
net shape specimens and built in the weakest orientation or
highest variability orientation as determined during the ma-
12. Microstructure
chine and material qualification as agreed upon by the part
12.1 Microstructural requirements and frequency of exami- supplier and purchaser.
nations shall be agreed upon by the supplier and purchaser i
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