1、Designation: A575 96 (Reapproved 2018)Standard Specification forSteel Bars, Carbon, Merchant Quality, M-Grades1This standard is issued under the fixed designation A575; the number immediately following the designation indicates the year oforiginal adoption or, in the case of revision, the year of la
2、st revision. A number in parentheses indicates the year of last reapproval. Asuperscript epsilon () indicates an editorial change since the last revision or reapproval.This standard has been approved for use by agencies of the U.S. Department of Defense.1. Scope1.1 This specification covers hot-wrou
3、ght merchant qualitycarbon steel bars produced to a chemical composition. Mer-chant quality bars are used for structural and similar miscella-neous bar applications involving moderate cold bending, mod-erate hot forming, punching, and welding as used in theproduction of noncritical parts. Moderate c
4、old bending in-volves a generous bend radius with the axis of the bendtransverse to the direction of rolling.1.2 Special quality hot-wrought carbon steel bars are cov-ered in Specification A576.1.3 Some end uses may require one or more of the availabledesignations shown under Supplementary Requireme
5、nts.1.4 The values stated in inch-pound units are to be regardedas standard. The values given in parentheses are mathematicalconversions to SI units that are provided for information onlyand are not considered standard.1.5 This international standard was developed in accor-dance with internationally
6、 recognized principles on standard-ization established in the Decision on Principles for theDevelopment of International Standards, Guides and Recom-mendations issued by the World Trade Organization TechnicalBarriers to Trade (TBT) Committee.2. Referenced Documents2.1 ASTM Standards:2A29/A29M Specif
7、ication for General Requirements for SteelBars, Carbon and Alloy, Hot-WroughtA576 Specification for Steel Bars, Carbon, Hot-Wrought,Special Quality3. Ordering Information3.1 Orders under this specification should include the fol-lowing as required to describe adequately the desired material:3.1.1 AS
8、TM specification number and date of issue,3.1.2 Grade designation or chemical composition (Section 7and appropriate chemical analysis tables),3.1.3 Supplementary Requirements or additions, if required,3.1.4 Dimensions and quantity, and3.1.5 End use and processing.4. Materials and Manufacture4.1 The
9、steel shall be made by the basic-oxygen or electric-furnace process.5. Conditions5.1 Merchant quality bars are available in rounds, squares,round cornered squares, hexagons, and bar size shapes under 3in. (76.2 mm), and in flats less than 40.8 lb/ft (60.7 kg/m).Hot-wrought merchant quality carbon st
10、eel bars are producedin cut lengths and coils; the producer should be consultedregarding sections and sizes available in coils.5.2 Merchant quality is available within a composition of0.50 % maximum carbon, 0.60 % maximum manganese,nonresulfurized, non-leaded. The phosphorus content is0.04 %, max, a
11、nd the sulfur content is 0.05 %, max. Merchantquality grades of steel are shown in Table 1 and chemicalranges and limits in Table 2; the grade numbers are designatedwith the prefix “M.” Merchant quality bars are not produced toany specified silicon content, grain size, or other requirementthat would
12、 influence the type of steel.5.3 Merchant quality bars shall be free of visible pipe;however, they may contain pronounced chemical segregation.Internal porosity, surface seams, and other surface irregularitiesmay be present in this quality.6. Chemical Composition6.1 The steel shall conform on heat a
13、nalysis to the require-ments of chemical composition in Table 1, or chemicalcompositions can be specified that conform to the ranges andlimits in Table 2. The heat analysis shall be reported to thepurchaser for the elements specified.1This specification is under the jurisdiction of ASTM Committee A0
14、1 on Steel,Stainless Steel and Related Alloys and is the direct responsibility of SubcommitteeA01.15 on Bars.Current edition approved Sept. 1, 2018. Published September 2018. Originallyapproved in 1967. Last previous edition approved in 2013 as A57596(2013)1.DOI: 10.1520/A0575-96R18.2For referenced
15、ASTM standards, visit the ASTM website, www.astm.org, orcontact ASTM Customer Service at serviceastm.org. For Annual Book of ASTMStandards volume information, refer to the standards Document Summary page onthe ASTM website.Copyright ASTM International, 100 Barr Harbor Drive, PO Box C700, West Consho
16、hocken, PA 19428-2959. United StatesThis international standard was developed in accordance with internationally recognized principles on standardization established in the Decision on Principles for theDevelopment of International Standards, Guides and Recommendations issued by the World Trade Orga
17、nization Technical Barriers to Trade (TBT) Committee.17. General Requirements7.1 Material furnished under this specification shall con-form to the requirements of the current edition of SpecificationA29/A29M.SUPPLEMENTARY REQUIREMENTSOne or more of the following supplementary requirements shall appl
18、y when specified by thepurchaser.S1. Special StraightnessS1.1 Bars may be specified to special straightness tolerance(see Specification A29/A29M).S2. CleaningS2.1 The purchaser may specify that the surface of bars bedescaled by pickling or blast cleaning.S3. CoatingS3.1 The purchaser may specify oil
19、 coating on bars thathave been descaled.TABLE 1 Grade Designations and Chemical Compositions of Hot-Wrought Merchant Quality M Series Carbon Steel BarsGradeDesignationCarbon,%Manganese,A%Phosphorus,max,%Sulfur,max, %M 1008 0.10 max 0.250.60 0.04 0.05M 1010 0.070.14 0.250.60 0.04 0.05M 1012 0.090.16
20、0.250.60 0.04 0.05M 1015 0.120.19 0.250.60 0.04 0.05M 1017 0.140.21 0.250.60 0.04 0.05M 1020 0.170.24 0.250.60 0.04 0.05M 1023 0.190.27 0.250.60 0.04 0.05M 1025 0.200.30 0.250.60 0.04 0.05M 1031 0.260.36 0.250.60 0.04 0.05M 1044 0.400.50 0.250.60 0.04 0.05AUnless prohibited by the purchaser, the man
21、ganese content shall be permitted toexceed 0.60 % on heat analysis to a maximum of 0.75 %, provided that the carbonrange on heat analysis has the minimum reduced by 0.01 % for each 0.05 %manganese over 0.60 %.TABLE 2 Heat Chemical Ranges and Limits of Hot-Wrought Merchant Quality M Series Carbon Ste
22、el BarsElement Chemical Ranges and Limits, %When Maximum ofSpecified Element is:Range LowestMaximumCarbon . . 0.10To 0.12 incl . .Over 0.12 to 0.24 incl 0.07 .Over 0.24 to 0.27 incl 0.08 .Over 0.27 to 0.50 incl 0.10 . . 0.35ManganeseATo 0.60 incl 0.35 . .Phosphorus To 0.04 incl . 0.04Sulfur To 0.05
23、incl . 0.05Copper When copper is required0.20 minimum isgenerally specified. .AUnless prohibited by the purchaser, the manganese content may exceed 0.60 % on heat analysis to a maximum of 0.75 %, provided that the carbon range on heatanalysis has the minimum and maximum reduced by 0.01 % for each 0.
24、05 % manganese over 0.60 %.A575 96 (2018)2ASTM International takes no position respecting the validity of any patent rights asserted in connection with any item mentionedin this standard. Users of this standard are expressly advised that determination of the validity of any such patent rights, and t
25、he riskof infringement of such rights, are entirely their own responsibility.This standard is subject to revision at any time by the responsible technical committee and must be reviewed every five years andif not revised, either reapproved or withdrawn. Your comments are invited either for revision
26、of this standard or for additional standardsand should be addressed to ASTM International Headquarters. Your comments will receive careful consideration at a meeting of theresponsible technical committee, which you may attend. If you feel that your comments have not received a fair hearing you shoul
27、dmake your views known to the ASTM Committee on Standards, at the address shown below.This standard is copyrighted by ASTM International, 100 Barr Harbor Drive, PO Box C700, West Conshohocken, PA 19428-2959,United States. Individual reprints (single or multiple copies) of this standard may be obtain
28、ed by contacting ASTM at the aboveaddress or at 610-832-9585 (phone), 610-832-9555 (fax), or serviceastm.org (e-mail); or through the ASTM website(www.astm.org). Permission rights to photocopy the standard may also be secured from the Copyright Clearance Center, 222Rosewood Drive, Danvers, MA 01923, Tel: (978) 646-2600; http:/ 96 (2018)3
