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ASTM A920/A920M-14(2019)

(Specification)

Standard Specification for Steel Bars, Microalloy, Hot-Wrought, Special Quality, Mechanical Properties

Standard Specification for Steel Bars, Microalloy, Hot-Wrought, Special Quality, Mechanical Properties

ABSTRACT
This specification covers standards for hot-wrought, special quality microalloyed carbon steel bars intended for use in applications where as-rolled mechanical properties are desired. A typical end use includes hydraulic cylinder shafts. The typical chemical composition of microalloyed carbon steel shall contain carbon, manganese, phosphorus, sulfur, and vanadium. Heat and product analyses shall be conducted wherein the material shall conform to the required chemical composition for vanadium, columbium (niobium), and molybdenum. The elements and specified chemical ranges shall not exceed the required limits. The steel bars shall undergo tension test and conform to the mechanical property requirements such as yield strength, tensile strength, and elongation.
SCOPE
1.1 This specification covers hot-wrought, special quality microalloyed carbon steel bars intended for use in applications where as-rolled mechanical properties are desired. A typical end use is hydraulic cylinder shafts.  
1.2 The bars shall be furnished to chemical composition and mechanical properties as provided herein. Chemical composition is based on standard carbon steel grades modified to include microalloying elements such as columbium (niobium), vanadium, or molybdenum. Three strength classes are available, designated 75 [520], 80 [550], and 100 [690], corresponding to the minimum yield strength in ksi.  
1.3 Sections and sizes of bar steels available are covered in Specification A29/A29M.  
1.4 Supplementary Requirements S1 to S5 are provided for use when additional controls or requirements are desired. These shall apply only when specified on the purchase order.  
1.5 The values stated in either SI units or inch-pound units are to be regarded separately as standard. The values stated in each system are not necessarily exact equivalents; therefore, to ensure conformance with the standard, each system shall be used independently of the other, and values from the two systems shall not be combined.  
1.6 Unless the order specifies the applicable “M” specification designation, the material shall be furnished to the inch-pound units.  
1.7 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-Aug-2019
ICS
77.140.20 - Stainless steels
Technical Committee
A01 - Steel, Stainless Steel and Related Alloys
Drafting Committee
A01.15 - Bars
Current Stage
Ref Project

Relations

Replaces
ASTM A920/A920M-14 - Standard Specification for Steel Bars, Microalloy, Hot-Wrought, Special Quality, Mechanical Properties
Effective Date
01-Sep-2019
Refers
ASTM A370-24 - Standard Test Methods and Definitions for Mechanical Testing of Steel Products
Effective Date
01-Mar-2024
Refers
ASTM E45-18a(2023) - Standard Test Methods for Determining the Inclusion Content of Steel
Effective Date
01-Nov-2023
Refers
ASTM A576-23 - Standard Specification for Steel Bars, Carbon, Hot-Wrought, Special Quality
Effective Date
01-Nov-2023
Refers
ASTM A370-19 - Standard Test Methods and Definitions for Mechanical Testing of Steel Products
Effective Date
01-Jul-2019
Refers
ASTM A370-17a - Standard Test Methods and Definitions for Mechanical Testing of Steel Products
Effective Date
15-Nov-2017
Refers
ASTM A576-17 - Standard Specification for Steel Bars, Carbon, Hot-Wrought, Special Quality
Effective Date
01-Nov-2017
Refers
ASTM A370-17 - Standard Test Methods and Definitions for Mechanical Testing of Steel Products
Effective Date
01-Jan-2017
Refers
ASTM A29/A29M-15 - Standard Specification for General Requirements for Steel Bars, Carbon and Alloy, Hot-Wrought
Effective Date
01-Nov-2015
Refers
ASTM A370-15 - Standard Test Methods and Definitions for Mechanical Testing of Steel Products
Effective Date
01-Nov-2015
Refers
ASTM A370-14 - Standard Test Methods and Definitions for Mechanical Testing of Steel Products
Effective Date
15-May-2014
Refers
ASTM A370-13 - Standard Test Methods and Definitions for Mechanical Testing of Steel Products
Effective Date
15-Nov-2013
Refers
ASTM A370-12a - Standard Test Methods and Definitions for Mechanical Testing of Steel Products
Effective Date
15-Oct-2012
Refers
ASTM A29/A29M-12 - Standard Specification for Steel Bars, Carbon and Alloy, Hot-Wrought, General Requirements for
Effective Date
01-May-2012
Refers
ASTM A29/A29M-12e1 - Standard Specification for General Requirements for Steel Bars, Carbon and Alloy, Hot-Wrought
Effective Date
01-May-2012

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ASTM A920/A920M-14(2019) - Standard Specification for Steel Bars, Microalloy, Hot-Wrought, Special Quality, Mechanical PropertiesASTM A920/A920M-14(2019) - Standard Specification for Steel Bars, Microalloy, Hot-Wrought, Special Quality, Mechanical Properties
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ASTM A920/A920M-14(2019) - Standard Specification for Steel Bars, Microalloy, Hot-Wrought, Special Quality, Mechanical Properties
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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:A920/A920M −14 (Reapproved 2019)
Standard Specification for
Steel Bars, Microalloy, Hot-Wrought, Special Quality,
Mechanical Properties
This standard is issued under the fixed designationA920/A920M; 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 2. Referenced Documents
2.1 ASTM Standards:
1.1 This specification covers hot-wrought, special quality
microalloyed carbon steel bars intended for use in applications A29/A29M SpecificationforGeneralRequirementsforSteel
Bars, Carbon and Alloy, Hot-Wrought
where as-rolled mechanical properties are desired. A typical
end use is hydraulic cylinder shafts. A370 Test Methods and Definitions for Mechanical Testing
of Steel Products
1.2 Thebarsshallbefurnishedtochemicalcompositionand
A576 Specification for Steel Bars, Carbon, Hot-Wrought,
mechanical properties as provided herein. Chemical composi-
Special Quality
tion is based on standard carbon steel grades modified to
E45 Test Methods for Determining the Inclusion Content of
include microalloying elements such as columbium (niobium),
Steel
vanadium, or molybdenum. Three strength classes are
available, designated 75 [520], 80 [550], and 100 [690],
3. Terminology
corresponding to the minimum yield strength in ksi.
3.1 Definitions of Terms Specific to This Standard:
1.3 Sections and sizes of bar steels available are covered in
3.1.1 microalloyed steels, n—carbon steels to which small
Specification A29/A29M.
quantities of certain elements are added in order to enhance
1.4 Supplementary Requirements S1 to S5 are provided for mechanical properties.
use when additional controls or requirements are desired.
3.1.1.1 Discussion—This enhancement of mechanical prop-
These shall apply only when specified on the purchase order.
erties results from control of the temperature and cooling rate
during the hot-rolling process.
1.5 The values stated in either SI units or inch-pound units
are to be regarded separately as standard. The values stated in
4. Ordering Information
each system are not necessarily exact equivalents; therefore, to
ensure conformance with the standard, each system shall be
4.1 Orders for material supplied to this specification should
used independently of the other, and values from the two
include the following, as required, to describe adequately the
systems shall not be combined.
desired material:
4.1.1 Quantity (weight or number of bars);
1.6 Unless the order specifies the applicable “M” specifica-
tion designation, the material shall be furnished to the inch- 4.1.2 Name of material (hot-rolled microalloyed steel bars);
pound units.
4.1.3 Dimensions;
4.1.4 ASTM specification number and date of issue;
1.7 This international standard was developed in accor-
dance with internationally recognized principles on standard- 4.1.5 Gradedesignationorchemicalcompositionlimits(see
ization established in the Decision on Principles for the
Section 7);
Development of International Standards, Guides and Recom-
4.1.6 Class;
mendations issued by the World Trade Organization Technical
4.1.7 Additions to the specification and Supplementary
Barriers to Trade (TBT) Committee.
Requirements, if required; and,
4.1.8 End use.
This specification is under the jurisdiction ofASTM Committee A01 on Steel,
Stainless Steel and Related Alloys and is the direct responsibility of Subcommittee
A01.15 on Bars. For referenced ASTM standards, visit the ASTM website, www.astm.org, or
Current edition approved Sept. 1, 2019. Published September 2019. Originally contact ASTM Customer Service at service@astm.org. For Annual Book of ASTM
approved in 1993. Last previous edition approved in 2014 as A920/A920M–14. Standards volume information, refer to the standard’s Document Summary page on
DOI: 10.1520/A0920_A0920M–14R19. 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
A920/A920M−14 (2019)
TABLE 1 Typical Chemical Compositions of Microalloyed Carbon Steels
NOTE 1—These compositions are identical to those in Specification A576, with the exception of the addition of vanadium.
Base Grade Designation Chemical Composition Limits, %
C Mn PSV
10V40 0.37–0.44 0.60–0.90 0.040 max 0.050 max 0.02–0.20
10V45 0.43–0.50 0.60–0.90 0.040 max 0.050 max 0.02–0.20
11V37 0.32–0.39 1.35–1.65 0.040 max 0.08–0.13 0.02–0.20
11V41 0.37–0.45 1.35–1.65 0.040 max 0.08–0.13 0.02–0.20
15V24 0.19–0.25 1.35–1.65 0.040 max 0.050 max 0.02–0.20
15V41 0.36–0.44 1.35–1.65 0.040 max 0.050 max 0.02–0.20
5. General Requirements 7.4 Titanium shall be added when specified for refinement
of the ferritic-pearlitic (or bainitic) or austenitic grain size.
5.1 Material furnished under this specification shall con-
When titanium is specified, the titanium limits shall be as
form to the applicable requirements of the current edition of
agreed upon between producer and purchaser. The titanium
Specification A29/A29M, unless otherwise provided herein.
content shall be reported.
6. Materials and Manufacture
7.5 Nitrogenmaybespecifiedasasupplementtovanadium,
6.1 Melting Practice—The steel shall be produced in accor- columbium, or titanium. If specified, the nitrogen content shall
not exceed 0.030 % and shall be reported.
dance with the applicable methods for primary and secondary
melting outlined in Specification A576.
7.6 Sampling for heat and product analysis shall be in
6.2 The steel shall be killed. Supplementary Requirements accordance with the requirements of Specification A29/A29M.
S1 through S5 may be invoked upon agreement between
producer and purchaser.
8. Mechanical Properties
6.3
...

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SCOPE
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Standard Specification for Stainless Steel Billets and Bars for Forging

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This specification covers stainless steel billets and bars for forging. The steel materials shall be annealed and conditioned by chipping or grinding. The steel specimens shall conform to the required chemical compositions of carbon, manganese, phosphorus, sulfur, silicon, chromium, nickel, molybdenum, nitrogen, and other elements.
SCOPE
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ASTM
ASTM A1018/A1018M-23a(Specification)
Standard Specification for Steel, Sheet and Strip, Heavy-Thickness Coils, Hot-Rolled, Carbon, Commercial, Drawing, Structural, High-Strength Low-Alloy, High-Strength Low-Alloy with Improved Formability, and Ultra-High Strength

ABSTRACT
This specification covers standards for hot-rolled, heavy-thickness steel sheet and strip coils. The materials shall come in the following designations: (a) Commercial Steel (or CS) of Types A and B, and Standard Steel Designation; (b) Drawing Steel (DS) of Types A and B, and Standard Steel Designation; (c) Structural Steel (SS) of Grades 30[205], 33[230], 36[250] in Types 1 and 2, and 40[275]; (d) High-Strength Low-Alloy Steel (HSLAS) of Grades 45[310], 50[340], 55[380], 60[410], 65[450], and 70[480] in Classes 1 and 2; (e) High-Strength Low-Alloy Steel with Improved Formability (HSLAS-F) of Grades 50[340], 60[410], 70[480], and 80[550]; and (f) Ultra-High Strength Steel (UHSS) of Grades 90[620] and 100[690], Types 1 and 2. The strip and sheet coils shall conform to specified limit in width and thickness. Carbon, manganese, phosphorus, silicon, aluminum, silicon, copper, nickel, chromium, molybdenum, columbium, titanium, nitrogen, and boron contents shall be followed as specified by each designations, classes, types, and grades. Tension tests shall be performed. Materials shall adhere to yield strength, tensile strength, and elongation requirements. Guidelines for workmanship, finish, and appearance are given.
SCOPE
1.1 This specification covers hot-rolled, heavy-thickness coils beyond the size limits of Specification A1011/A1011M.  
1.2 The product is available in six designations: Commercial Steel, Drawing Steel, Structural Steel, High-Strength Low-Alloy Steel, High-Strength Low-Alloy Steel with Improved Formability, and Ultra-High Strength Steel.  
1.3 This material is available only in coils described as follows:    
Product  
Size Limits, Coils Only  
Width, in. [mm]  
Thickness, in. [mm]  
Strip  
Over 8 to 12, incl
[Over 200 to 300]  
0.230 to 1.000, incl
[From 6.0 through 25]  
Sheet  
Over 12
[Over 300]  
0.230 to 1.000, incl
[From 6.0 through 25]
Note 1: The changes in width limits with the publication of A635/A635M – 06a result in a change in tensile testing direction for material from 0.180 in. [4.5 mm] to 0.230 in. exclusive [6.0 mm exclusive] over 48 in. [1200 mm] wide as that material is now covered by Specification A568/A568M – 06a. The purchaser is advised to discuss this change with the supplier.  
1.4 Sheet and strip in coils of sizes noted in 1.3 are covered by this specification only with the following provisions:  
1.4.1 The material is to be fed directly from coils into a blanking press, drawing or forming operation, tube mill, rolling mill, or sheared or slit into blanks for subsequent drawing or forming.  
1.4.2 The material is not to be converted into steel plates for structural or pressure vessel use unless tested in complete accordance with the appropriate sections of Specifications A6/A6M (plates provided from coils) or A20/A20M (plates produced from coils). Plate converted from coils is no longer governed by this sheet steel specification and since this material is now a plate, the requirements of the appropriate plate specification shall apply, except in cases where there is a conflict between the requirements of the plate specification and this specification. In these cases, the more restrictive limits of either specification shall apply.  
1.4.3 The dimensional tolerances of Specification A635/A635M are applicable to material produced to this specification.  
1.4.4 Not all strength levels are available in all thicknesses. The user should consult the producer for appropriate size limitations.  
1.5 The values stated in either SI units or 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 the other. Combining values from the two systems may result in non-conformance with the standard.  
1.6 This standard does not purport to address all of the safety concerns, if any, associated with its use. It is the responsibi...

  • Technical specification
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  • Technical specification
    8 pages
    English language
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ASTM
ASTM A1011/A1011M-23(Specification)
Standard Specification for Steel, Sheet and Strip, Hot-Rolled, Carbon, Structural, High-Strength Low-Alloy, High-Strength Low-Alloy with Improved Formability, and Ultra-High Strength

ABSTRACT
This specification covers hot-rolled, carbon, structural, high-strength low-alloy, high-strength low-alloy with improved formability, and ultra-high strength steel sheet and strip, in coils and cut lengths. The steels covered here are: Commercial Steels of types A, B, C, and D; Drawing Steels of types A and B; Structural Steels of grades 30 [205], 33 [230], 36 [250] (with Types 1 and 2), 40 [275], 45 [310], 50 [340], 55 [380], 60 [410], 70 [480], and 80 [550]; High-strength Low-alloy Steel of classes 1 and 2 in grades 45 [310], 50 [340], 55 [380], 60 [410], 65 [450], and 70 [480]; High-strength Low-alloy steels with improved formability in grades 50 [340], 60 [410], 70 [480], and 80 [550]; and Ultra-high Strength Steels of types 1 and 2 in grades 90 [620] and 100 [690]. Heat and product analyses shall be performed wherein specimens shall conform to required chemical composition of carbon, manganese, phosphorus, sulfur, aluminum, silicon, copper, nickel, chromium, molybdenum, vanadium, niobium, titanium, nitrogen, and boron. Except for Commercial and Drawing steels, all other steels shall undergo two tension tests, and shall conform to the following mechanical requirements: yield strength, tensile strength, and elongation. All steels shall undergo bending tests.
SCOPE
1.1 This specification covers hot-rolled, carbon, structural, high-strength low-alloy, high-strength low-alloy with improved formability, and ultra-high strength steel sheet and strip, in coils and cut lengths.  
1.2 Hot rolled steel sheet and strip is available in the designations as listed in 4.1.  
1.3 This specification is not applicable to the steel covered by Specification A635/A635M.  
1.4 The values stated in either SI units or 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 the other. Combining values from the two systems may result in non-conformance with the standard.  
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.

  • Technical specification
    8 pages
    English language
    sale 15% off
  • Technical specification
    8 pages
    English language
    sale 15% off