1、Designation: A1075 12Standard Specification forFlanged Steel U-Channel Posts1This standard is issued under the fixed designation A1075; the number immediately following the designation indicates the year oforiginal adoption or, in the case of revision, the year of last revision. A number in parenthe
2、ses indicates the year of last reapproval. Asuperscript epsilon () indicates an editorial change since the last revision or reapproval.1. Scope1.1 This specification covers flanged U-channel carbon steelposts having a nominal weight ranging from 0.75 to 6.0 lb/ftand a nominal width ranging from 1.25
3、 to 4.0 in. These postsare furnished in the as-wrought condition intended for appli-cations requiring high tensile strength or crashworthiness andwith a lower carbon (LC) designation for use where higherductility or improved weldability are required. These materialsare available in multiple yield st
4、rength levels of 50, 60, 70, and80 ksi (345, 420, 485, and 550 MPa). The 50- and 60-ksi (345-and 420-MPa) yield strength grades are available as lowercarbon posts, designated as Grades 50LC or 60LC.NOTE 1This specification does not cover high-strength low-alloy(HSLA) post. Refer to Specification A57
5、2/A572M for HSLA. Forstructural Grade 36, refer to Specification A36/A36M.1.2 UnitsThe values stated in inch-pound units are to beregarded as the standard. The values given in parentheses aremathematical conversions to SI units that are provided forinformation only and are not considered standard.1.
6、3 This standard does not purport to address all of thesafety concerns, if any, associated with its use. It is theresponsibility of the user of this standard to establish appro-priate safety and health practices and determine the applica-bility of regulatory limitations prior to use.2. Referenced Doc
7、uments2.1 ASTM Standards:2A1 Specification for Carbon Steel Tee RailsA6/A6M Specification for General Requirements for RolledStructural Steel Bars, Plates, Shapes, and Sheet PilingA29/A29M Specification for Steel Bars, Carbon and Alloy,Hot-Wrought, General Requirements forA36/A36M Specification for
8、Carbon Structural SteelA123/A123M Specification for Zinc (Hot-Dip Galvanized)Coatings on Iron and Steel ProductsA370 Test Methods and Definitions for Mechanical Testingof Steel ProductsA499 Specification for Steel Bars and Shapes, CarbonRolled from “T” RailsA572/A572M Specification for High-Strength
9、 Low-AlloyColumbium-Vanadium Structural Steel2.2 AASHTO Standard:AASHTO Manual for Assessing Safety Hardware33. Terminology3.1 Definitions of Terms Specific to This Standard:3.1.1 crashworthiness, nability of signs, signals, andother safety hardware to fail in such a manner so as not toshatter or ca
10、use injury to passengers in vehicles involved in animpact or collision.3.1.2 lot, nfor product produced from rolled “T” rails, alot shall consist of material of the same size product producedin one shift in accordance with Specification A499.3.1.3 U-channel post, nbars with a “flanged U shape” topro
11、vide increased stiffness when loaded in the transversedirection, typically having punched holes and primarily usedfor the attachment of highway signs.4. Ordering Information4.1 Orders for material under this specification shouldinclude the following information:4.1.1 Quantity (weight or number of pi
12、eces);4.1.2 Name of material (steel posts);4.1.3 Grade of steel (Grades 50, 50LC , 60, 60LC, 70, or80);4.1.4 Weight per foot;4.1.5 Condition (as-rolled, painted, powder coated, or gal-vanized);4.1.6 Hole punching, if required;4.1.7 ASTM designation and date of issue;4.1.8 Certification, if required
13、(Section 11);4.1.9 Product marking; and4.1.10 Product packaging and package marking.NOTE 2A typical ordering description is as follows: 1000 pieces,flanged u-channel post, Grade 60, 8 ft (2.4 m) long, 2 lb (0.9 kg) per foot,1This specification is under the jurisdiction of ASTM Committee A01 on Steel
14、,Stainless Steel and Related Alloys and is the direct responsibility of SubcommitteeA01.15 on Bars.Current edition approved March 1, 2012. Published April 2012. DOI: 10.1520/A1075-12.2For referenced ASTM standards, visit the ASTM website, www.astm.org, orcontact ASTM Customer Service at serviceastm.
15、org. For Annual Book of ASTMStandards volume information, refer to the standards Document Summary page onthe ASTM website.3Available from American Association of State Highway and TransportationOfficials (AASHTO), 444 N. Capitol St., NW, Suite 249, Washington, DC 20001,http:/www.transportation.org.1
16、Copyright ASTM International, 100 Barr Harbor Drive, PO Box C700, West Conshohocken, PA 19428-2959, United States.as-rolled, ASTM AXXXX dated _.5. Materials and Manufacture5.1 FeedstockMaterial may be manufactured from re-rolled rail steel or rolled from billet steel.5.2 Material produced from rerol
17、led rails shall be made toconform to Specification A499.5.3 Material produced from billet steel shall be made by thecommercially available steel-making processes.5.4 Posts shall be supplied in the hot rolled condition, unlessotherwise specified in the purchase order.6. Chemical Composition6.1 Materi
18、al rerolled from rails shall conform to the chem-istry requirements of Specification A1, as the chemistry is notsignificantly changed by the hot rolling process.6.2 Material rolled from billets shall conform to the require-ments prescribed in Table 1.6.2.1 The heat analysis report shall be furnished
19、 to thepurchaser.6.2.2 By agreement between the purchaser and supplier,limits can be established for elements or compounds notspecified in Table 1.6.2.3 The product analysis shall be permitted to vary fromthe heat analysis according to the limits established in Table Aof A6/A6M.7. Mechanical Propert
20、ies7.1 RequirementsThe material as represented by the testspecimens shall conform to the tensile requirements specifiedin Table 2.7.2 Test SpecimensTest specimens may be taken from afull section or a machined section.7.2.1 Sub-sized tensile specimens shall be taken from theflat part of the U-shaped
21、section.7.3 Test MethodTensile tests shall be made in accordancewith Test Methods and Definitions A370.8. Dimensions, Mass, and Permissible Variations8.1 DimensionsBecause of differences in mill facilities,tolerances of post sections vary among the manufacturers andsuch tolerances are subject to agr
22、eement between manufacturerand purchaser.8.2 Weight per Unit LengthThe permissible variation forweight per foot shall be in accordance with the requirementsspecified in Table 4.8.3 LengthThe permissible variations for length shall bein accordance with the requirements specified in Table 3.8.4 Straig
23、htnessVariations in straightness shall not ex-ceed 0.25 in. in any 5 ft 4 mm in any meter or 0.25 in. 3number of feet of length divided by 5 4 mm 3 number ofmetres of length.9. Finish, Condition, and Appearance9.1 Surface FinishThe posts shall have a commercialhot-wrought finish obtained by conventi
24、onal hot rolling. Theposts shall be free of injurious defects, such as, but not limitedto, seams, scabs, inclusions visible to the unaided eye, laps,splits or slivers.9.2 ConditionPosts can be furnished as-rolled, painted,coated, or galvanized as specified by the purchaser.9.2.1 When specified by th
25、e purchaser to be galvanized, theposts shall be zinc coated in accordance with SpecificationA123/A123M.10. Number of Tests and Retests10.1 One tension test shall be made from each heat.10.2 When the heat or lot is produced to multiple sizes(varying by more than 10 % in weight per foot), tensile test
26、sshall be performed on the thickest and thinnest material rolledfrom that heat.10.3 Retesting for failed mechanical properties shall bepermitted in accordance with Specification A29/A29M.11. Rejection and Rehearing11.1 Material that fails to conform to the requirements ofthis specification shall be
27、rejected in accordance with theprocedures of Specification A29/A29M. Rejection should bereported to the producer or supplier promptly and in writingwithin two weeks of testing or inspection. In case of dissatis-faction with the results of the test, the producer or supplier maymake claim for rehearin
28、g.TABLE 1 Chemical RequirementsAGrades Carbon ManganesePhosphorus,maxSulfur,maxSiliconStandard 0.550.84 0.601.10 0.035 0.040 0.100.50LC 0.220.55 0.300.90 0.035 0.040 0.100.50AOther alloying elements not specified in Table 1 may be typically added at thediscretion of the producer, but shall be report
29、ed in the heat analysis.TABLE 2 Mechanical RequirementsGrade 50LC 60LC 50 60 70 80Yield strength,min, ksi (MPa)50 (345) 60 (415) 50 (345) 60 (415) 70 (485) 80 (550)Tensile strength,min, ksi (MPa)70 (485) 80 (550) 80 (550) 90 (620) 95 (655) 110 (760)Elongation in 8 in or200 mm, min, %12 10 5 5 5 5Elo
30、ngation in 2 in or50 mm, min, %14 12 7 7 7 7TABLE 3 Permissible Variations in Weight per Unit LengthPermissible Variations from Specified Size, %65 % of ordered weight per unit length before subsequent manufacturingprocessing such as hole punchingTABLE 4 Permissible Variations in LengthPermissible V
31、ariations over Specified Length, in. (cm)A,BTo5ft(1.52 m),incl.Over 510 ft(1.523.05 m),incl.Over 1020 ft(3.056.10 m),incl.Over 2030 ft(6.109.14 m),incl.30 to 40 ft(9.1412.19 m)12 in. (1 cm)58 in. (2 cm)34 in. (2 cm) 1 in. (3 cm ) 112 in.(4cm)ANo permissible variation under ordered length.BWhere a pl
32、us and minus tolerance from specified length is desired and theorder so specifies, half of these tolerances may be taken over and half under.A1075 12212. Certification12.1 When specified in the purchase order or contract, thepurchaser shall be furnished certification stating samples rep-resenting ea
33、ch heat or lot have been tested as indicated in thisspecification and the requirements have been met.12.2 When specified in the purchase order or contract, areport of the test results shall be furnished. Test reports may betransmitted to the purchaser by electronic services. The contentof the electr
34、onically transmitted document shall conform to anyexisting agreement between the purchaser and the seller.13. Product Marking13.1 Product marking details shall be specified in thepurchase order.14. Packaging and Package Marking14.1 Unless otherwise specified in the purchase order, theproduct shall b
35、e tied in bundles, with each bundle tagged witha unique identification (ID) or heat/lot number and the quantityand length of the product shipped.15. Keywords15.1 carbon steel post; delineator post; flanged U-channelpost; signpost; U-channel postSUPPLEMENTARY REQUIREMENTSThe following supplementary r
36、equirements shall apply only when specified by the purchaser in thepurchase order or contract.S1. When specified, the certification sheet shall contain anotarized statement that the flanged U-channel posts do notcontain any highly toxic or radioactive metals or compoundswithin the limits prescribed
37、by law, such as arsenic, cadmium,beryllium or mercury, and further state that the startingmaterials were melted and manufactured in the United States.S2. Flanged U-channels and posts shall be subject to crash-worthiness tests as outlined in the AASHTO Manual forAssessing Safety Hardware before accep
38、tance. Posts intendedfor use with signs, signals, solar panels, message boards orother types of safety hardware shall be tested with theappropriate attachments. Reports shall be furnished whenrequested.ASTM International takes no position respecting the validity of any patent rights asserted in conn
39、ection with any item mentionedin this standard. Users of this standard are expressly advised that determination of the validity of any such patent rights, and the riskof infringement of such rights, are entirely their own responsibility.This standard is subject to revision at any time by the respons
40、ible technical committee and must be reviewed every five years andif not revised, either reapproved or withdrawn. Your comments are invited either for revision of this standard or for additional standardsand should be addressed to ASTM International Headquarters. Your comments will receive careful c
41、onsideration at a meeting of theresponsible technical committee, which you may attend. If you feel that your comments have not received a fair hearing you shouldmake your views known to the ASTM Committee on Standards, at the address shown below.This standard is copyrighted by ASTM International, 10
42、0 Barr Harbor Drive, PO Box C700, West Conshohocken, PA 19428-2959,United States. Individual reprints (single or multiple copies) of this standard may be obtained 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 ASTM website (www.astm.org/COPYRIGHT/).A1075 123
