Mechanical Properties' SteelBars Carbon Hot-Wrought Special Quality StandardSpecificationfor
A superscrigt epsilon <) indicaes an edioeia change since the lat revisicn o seapproval. of original adopti ot i the case of revision the year of last revision. A nmber in pareheses indicates the year of last reapproal. This standad is isued uder the fised designation A 67S/A 675M; the nmber immdiately followng the deignation indicates the year This sna s bee apl for ase by agmcies ef se Deprm ef Deese. c Nom-Editorial changes were made to S7.1 in June 2005. 1. Scope* 2.Referenced Documents 1.1 This specification² covers hot-wrought special quality pd ses is eq pe sq as property requirements and intended for general constructional applications. 2.1 ASTM Standards: 3 A 29/A 29M Specification for Steel Bars Carbon and Alloy Hot-Wrought and Cold-Finished. General Requirements forA 370 Test Methoxds and Definitions for Mechanical Testing of Steel ProductsA 663/A 663M Specification for Steel Bars Carbon Mer- chant Quality Mechanical PropertiesE 290 Test Method for Semi-Guided Bend Test for Ductilityof Metallic Materials 45 50 55 60 65 70 75 80 and 90 [310 345 380 415 450 1.2 The bars are available in nine strength grades designated485 515 550 and 620] corresponding to the minimum ultimate tensile strength in ksi [MPa]. The chemical posi-tion is selected by the manufacturer to develop the requiredmechanical properties. 1.3 Hot-wrought special quality carbon steel bars subject toes u n oq e sb dod o lengths only. Sections and sizes available are covered inSpecification A 29/A 29M. 3. Terminology s s fo s end use method of fabrication or subsequent processing 3.1.1 special qualirySpecial quality bars are used whentreatment requires quality characteristics not available in mer-ing for general constructional uses. Some end uses or fabricat- chant quality. Typical applications involve bending or machin-ing procedures can necessitate one or more requirements which are described in the Supplementary Requirements. 1.4 Some applications may require one or more of theavailable designations shown under Supplementary Require-ments. Nom 1Merchant-quality hot-wrought carbon steel bars subject toA 663M. mechanical property requirements are covered in Specification A 663/ 1.5 The values stated in either inch-pound units or SI unitsare to be regarded separately as the standard. Within the text the SI units are shown in brackets. The values stated in eachsystem are not equivalents therefore each system must be usedindependently of the other. Combining values from the two systems may result in nonconformance with the specification. 4. Ordering Information 4.1 Orders for material under this specification shouldinclude the following information: 4.1.1 Quantity (weight or number of pieces) 4.1.2 Name of material (hot-wrought special quality bars) 4.1.3 Dimensions including length angle etc.) 4.1.4 Cross section (round square hexagon equal leg4.1.5 Specification designation and date of issue 4.1.6 Grade designation (Table 1) TABLE 1 Tensile Requirements Grade Tensile Strengh Yield Point min? Elongation min %℃Designa- tion* ksi [MPa8] ksi [MPa] 8 in or [200 mm] Gage Length 2 in or [50 mm] Gage Length 45 [310] 45 to 55 [310 to 380] 22.5 [155] 27 3350 [345] 55 [380] 60 [415] 50 to 60 55 to 65 60 to 72 [415 to 495] [345 to 415] [380 to 450] 26 27.5 30 [170] [205] [06:] 25 23 21 30 26 2265 [450] [9e] 0 65 to 77 70 to 85 [450 to 530] [485 to 585] 32.5 36 [225] [240] 17 14 20 1890 [620] 75 [515] 80 [550] 75 to 90 80min [515 to 620] [550 min] 37.5 40 [260] [275] 14 13 18 1790 min [620 min] 56 [380] 10 14 ^ When lead is required add the leter L' affer the grade designation for example. 45L. Wnteither 0.5 % xnsion-underload or 0.2 % ofset. The minmum ksl (MPa) requrement dos not change. The test report I required shal show yeld srength. See 7.1.1.3 through 7.1.1.6 for deduction in elongation due to section size. an added element. When lead is specified as an added element 6.2 Leaded SreelWhen required lead may be specified asa steel is identified by adding the letter L after the grade a range from 0.15 to 0.35 % inclusive shall be furmished. Suchdesignation for example 60L [415L]. 4.1.7 Leaded steel if required (6.2) 4.1.8 Copper bearing steel if required (6.3) 4.1.9 Test report if required (Section 10) 4.1.10 Supplementary Requirements or special require-ments if required and 4.1.11 Application and processing. 6.3 Copper-Bearing SteelWhen required copper may bespecified as an added element. Copper-bearing steel is identi-o asumd o uo sueq-raddo Sues q p Nom: 2A typical ordering description is as follows: 10 000 Ib [5000ft [25m × 3m] Round ASTM A 675/A 675M dated kg] Hot Wrought Special Quality Carbon Steel Bars 1 in. diameter × 10 Grade 50 Boiler Supports. [345] Copper Bearing Test Report Required S3 Special Straightness 6.4 When tension tests are waived in accordance with7.1.1.2 chemistry consistent with the mechanical properties desired shall be applied. 5. Materials and Manufacture 7. Mechanical Properties sqqqodd jo 5.1 Melring PracticeThe steel shall be made by one oroxygen or electric-furnace. The primary melting may incor-secondary melting using electroslag remelting or vacuum-arc porate separate degassing or refining and may be followed byremelting. Where secondary melting is employed the heat shall be defined as all of the ingots remelted from a singleprimary heat. 7.1 Tension Tests 7.1.1 Requirements: shall conform to the applicable requirements in Table 1. 7.1.1.1 The material as represented by the test specimen 7.1.1.2 Shapes less than 1 in.² [645 mm²] in cross sectionthickness or diameter need not be subject to tension tests by the and bars (other than flats) less than % in. [12.5 mm] inmanufacturer. 5.2 Deoxidarion: 5.2.1 Unless otherwise specified the steel shall be rimmed capped semi-killed or killed at the producer's option. 7.1.1.3 For material over %4 in. [19 mm] in thickness orfor each increase of /2 in. [0.8 mm] in the specified thickness elongation in 8 in. [200 mm] specified in Table 1 shall be made or diameter above % in. [19 mm]. 5.2.2 When required the purchaser may specify the re-quired deoxidation practice dependent upon strength grade specified purchaser’s methods of fabrication and end userequirements. Killed steels can be produced to coarse or fine austenitic grain size (Supplementary Requirement S1). 7.1.1.4 For material under %6 in. [8 mm] in thickness ordiameter a deduction of 2.00 % from the percentage ofelongation in 8 in. [200 mm] specified in Table 1 shall be made for each decrease of /α in. [0.8 mm] in the specified thicknessor diameter below %x in. [8 mm]. 5.3ConditionUnless otherwise specified the bars shall bethe producer’s option bars may be cleaned for inspection. fumished as-rolled and not pickled blast cleaned or oiled. At 6. Chemical Composition and 415] for material over 2 in. [50 mm] in thickness or 7.1.1.5 For Grades 45 50 55 60 and 65 [310 345 380 diameter a deduction of 1.00 % from the percentage of elongation in 2 in. [50 mm] specified in Table 1 shall be madefor each 1 in. [25 mm] of specified thickness or diameter or fraction thereof over 2 in. [50 mm] in thickness or diameter. specified in Table 2. 6.1 The steel shall conform to the chemical requirements TABLE 2 Chemical Requirements (Heat Analysis) ElementPhosphorus max 0.040Sulfur max Copper when copper steel is specifed min Lead 0.050 0.20 7.1.1.6 For Grades 70 75 80 and 90 [485 515 550 and620] for material over 2 in. [50 mm] in thickness or diameter a deduction of 1.00 % from the percentage of elongation in 2in. [50 mm] specified in Table 1 shall be made for each 1 in. When required lead my be specied as an added elment See 62 7.1.2 Tesr Specimens: 7.2 Bend Tests: 7.2.1 Requirements: [25 mm] of specified thickness or diameter or fraction thereof over 2 in. [50 mm] in diameter or thickness to a maximumdeduction of 3 %. 7.1.2.1 Test specimens shall be prepared for testing from thematerial in its as-rolled condition unless otherwise specified (see Supplementary Requirements). The tension specimen maybe aged as described in Test Methods and Definitions A 370. 7.1.2.2 Test specimens shall be taken longitudinally andmay be tested in full thickness or section or they may be machined to the dimensions shown in Fig. 4 or Fig. 5 of TestMethods and Definitions A 370. If test specimens are selectedconforming to the dimensions of Fig. 5 they shall be machined from a position midway between the center and the surface ofthe bar. 7.1.2.3 Test specimens for shapes and flats may be ma-Methods and Definitions A 370 or with both edges parallel. chined to the form and dimensions shown in Fig. 4 of TestTest specimens for material over 11 in. [40 mm] in thicknessor diameter may be machined to a thickness or diameter of at least 34 in. [20 mm] for a length of at least 9 in. [230 mm] orthey may conform to the dimensions shown in Fig. 5 of Test Methods and Definitions A 370. from each heat unless the finished material from a heat is less 7.1.3 Nuomber of TestsTwo tension tests shall be mades s o [ ] s s However for material 2 in. [50 mm] and under in thickness when the material from one heat differs % in. [9.5 mm] or morein thickness one tension test shall be made from both the thickest and the thinnest material rolled (larger than the sizes in7.1.1.2) regardless of the weight represented. For material over2 in. [50 mm] thick when the material from heat differs 1 in. [25 mm] or more in thickness one tension test shall be madefrom both the thickest and the thinnest material rolled that is more than 2 in. [50 mm] thick regardless of the weightrepresented. 7.1.4 Tesr MerhodTension tests shall be made in accor-dance with Test Methods and Definitions A 370 using the applicable method for determining yield point. 7.2.1.1 Bend requirements apply only to flat bars (all sizes) diameter and shapes less than 1 in.? [645 mm²] in cross bars other than flats less than % in. [12.5 mm] in thickness or section. When bend tests are required for other sizes Supple- mentary Requirement S6 must be specified. 7.2.1.2 The bend test specimen shall stand being bent atroom temperature through 180° without cracking on the outside of the bent portion to an inside diameter which shallhave the relation to the thickness or diameter of the specimen as given in Table 3. 7.2.2 Test Specimens: and under in diameter or thickness may be the full thickness of 7.2.2.1 Bend test specimens for material 1% in. [40 mm]the section. For flat bars over 2 in. [50 mm] in width the widthmay be reduced by milling to 1/ in. [40 mm]. 7.2.2.2 Bend test specimens for material over 1/ in. [40mm] in diameter or thickness may be machined to a thickness or diameter of at least 3/4 in. [20 mm] or to 1 by % in. [25 by12.5 mm] in section. Machined sides of bend test specimens [1.6 mm] for material 2 in. [50 mm] and under in thickness may have the corners rounded to a radius of not over /i6 in.and not over %s in. [3.2 mm] in radius for material over 2 in. [50 mm] in thickness. 7.2.3 Number of TesrsWhen subject to bend test two bendtests shall be made from each heat unless the finished material from a heat is less than 50 tons [45 Mg] when one bend test will be suficient. However for material 2 in. [50 mm] and under in thickness when the material from one heat differs %sin. [9.5 mm] or more in thickness one bend test shall be madeless of the weight represented. For material over 2 in. [50 mm] from both the thickest and the thinnest material rolled regard-thick when the material from one heat differs 1 in. [25 mm] or more in thickness one bend test shall be made from both thethickest and the thinnest material rolled that is more than 2 in.[50 mm] thick regardless of the weight represented. 7.2.4 Test MethodsBend tests shall be made in accordancewith Test Method E 290. 8. Workmanship Finish and Appearance 8.1Bars shall be free of visible pipe undue segregation andinjurious surface imperfections. 8.2 Surface FinishThe bars shall have a mercial5.3 for producer’s descaling option. hot-wrought finish obtained by conventional hot rolling. See TABLE 3 Bend Requirements Desigration Grade % [20] and Over%[20]to Ratio of Bend Dismeter to Thicknees of Specimen for Tickness or Diameter of Bar in. (mm) Over 1[25]t0 Over 1[40] Over2[50] to Over 3[75] to ]45 [310] Under 1 [25] inel 11% [40] inel 2 [50] incl 3 [75] incl 5 [125] incl 50 [345] 55 [380] fat flat % fat -1 % 1% 1 % 1% 1 2 2% 2% 1 2 3 3 3 3% 360 [415] 65 [450] 1 1% 1% 2 2% 3 3% 3 3% 4 4 570 [485] 75 [515] 1 2 2 2 2%6 3 3% 3 396 4 4% 4 5 690 [820] 80 [550] 2 2% 3 3% 4 4% 6 Bendrqurns rnt quidfrad ] bmasfdbyam bnpuraseranmafactr s umy qt(9s shall include the name of the manufacturer ASTM designation described in (7.1.3) and (7.2.3) are not exceeded. The reportnumber and year date and revision letter if any grade heatnumber and size. 9. General Requirements form to the applicable requirements for the current edition of 9.1 Material furnished under this specification shall con-Specification A 29/A 29 M. 10.2 The thickness of the product tested may not necessarilybe the same as an individual ordered thickness since it is the heat that is tested rather than each ordered item. 10. Certification certification that the material was manufactured and tested in 10.1 When specified by the purchaser a manufacturer’sheat analysis tensile requirements and bend test (if applicable) accordance with this specification together with a report of thetest results shall be furnished. Only one test need be reportedthan 10 tons [9 Mg]and when the thickness variations when the amount of material from a heat in a shipment is less report shall include a statement of pliance with the 10.3 When Supplementary Requirements are specified therequirement or the results of tests when the requirement involves measured test values. 11. Keywords 11.1 carbon steel bars; hot-wrought steel bars; steel bars SUPPLEMENTARY REQUIREMENTS One or more of the following supplementary requirements shall apply only when specified by thepurchaser in the inquiry contract or order. Details of these supplementary requirements shall be agreed upon in writing by the manufacturer and purchaser. Supplementary requirements shall in no S1. Grain Size S5. Coating size requirement or the fine austenitic grain size requirement S1.1 The steel shall conform to the coarse austenitic grainof Specification A 29/A 29M. S5.1 The purchaser may specify oil on bars that have beendescaled. S6. Bend Requirement S2. Thermal Treatment fied. Thebend ratio shall b as agreedunBend requrements S6.1 Bend requirements for Grade 90 [620] may be speci-for all other grades when specified shall be as specified in Table 3. material be stress relieved. S2.1 When required the purchaser may specify that the S3. Special Straightness (refer to Specification A 29/A 29M). S3.1 Bars may be specified to special straightness tolerance S7. Carbon Restriction S7.1 On grades 45 [310] 50 [345] 55 [380] and 60 [415] carbon shall be 0.35 % max. S4. Cleaning S4.1The purchaser may specify that the surface of bars bedescaled by pickling or blast cleaning. SUMMARY OF CHANGES (2000) that may impact the use of this standard. Committe A01 has identified the location of the following changes to this standard since A 675/A 675M-90a (1) Added Supplementary Requirement S7. A675/A675M-031 in his standard. 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