1、Designation: B90/B90M 15Standard Specification forMagnesium-Alloy Sheet and Plate1This standard is issued under the fixed designation B90/B90M; 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
2、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. Scope*1.1 This specification covers magnesium alloys in sheet andpla
3、te form designated as shown in Table 1.1.2 The values stated in either inch-pound or SI units are tobe regarded separately as standards. The SI units are shown inbrackets or in separate tables or columns. The values stated ineach system are not exact equivalents; therefore, each systemmust be used i
4、ndependent of the other. Combining values fromthe two systems may result in nonconformance with thespecification.1.3 Unless the order specifies the “M” specificationdesignation, the material shall be furnished to the inch-poundunits.1.4 This standard does not purport to address all of thesafety conc
5、erns, 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 Documents2.1 The following documents of the issue in effect on dateo
6、f material purchase form a part of this specification to theextent referenced herein:2.2 ASTM Standards:2B557 Test Methods for Tension Testing Wrought and CastAluminum- and Magnesium-Alloy ProductsB557M Test Methods for Tension Testing Wrought and CastAluminum- and Magnesium-Alloy Products (Metric)B
7、660 Practices for Packaging/Packing of Aluminum andMagnesium ProductsB954 Test Method for Analysis of Magnesium and Magne-sium Alloys by Atomic Emission SpectrometryE29 Practice for Using Significant Digits in Test Data toDetermine Conformance with SpecificationsE55 Practice for Sampling Wrought Non
8、ferrous Metals andAlloys for Determination of Chemical Composition2.3 Federal Standards:3Fed. Std. No. 123 Marking for Shipment (Civil Agencies)Fed. Std. No. 184 Identification Marking of Aluminum,Magnesium and Titanium2.4 Military Standards:3MIL-STD-129 Marking for Shipment and Storage2.5 Aerospace
9、 Materials Specification:4AMS-M-3171 Magnesium Alloy, Processes for Pretreatmentand Prevention of Corrosion2.6 ANSI Standards5ANSI H35.2 American National Standard Dimensional Tol-erances for Aluminum Mill ProductsANSI H32.2 (M) American National Standard DimensionalTolerances for Aluminum Mill Prod
10、ucts3. Terminology3.1 Definitions:3.1.1 plate, na rolled product rectangular in cross sectionand form, of thickness 0.250 in., or more, over 6.30 mm,either sheared or sawed edges.3.1.2 sheet, na rolled product rectangular in cross sectionand form, of thickness of 0.006 through 0.249 in. over 0.15thr
11、ough 6.30 mm with sheared, slit, or sawed edges.4. Ordering Information4.1 Orders for sheet and plate to this specification shallinclude the following information:4.1.1 Quantity in pieces, lbs, or kg4.1.2 Alloy (Section 5 and Table 1),4.1.3 Temper (Section 6 and Table 2),1This specification is under
12、 the jurisdiction of ASTM Committee B07 on LightMetals and Alloys and is the direct responsibility of Subcommittee B07.04 onMagnesium Alloy Cast and Wrought Products.Current edition approved Dec. 1, 2015. Published January 2016. Originallyapproved in 1932. Last previous edition approved in 2013 as B
13、90/B90M 13. DOI:10.1520/B0090_B0090M-15.2For referenced 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.3Available from Stand
14、ardization Documents Order Desk, DODSSP, Bldg. 4,Section D, 700 Robbins Ave., Philadelphia, PA 19111-5098, http:/www.dodssp.daps.mil.4Available from SAE International (SAE), 400 Commonwealth Dr., Warrendale,PA 15096-0001, http:/www.sae.org.5Available fromAmerical National Standards Institute, 11 Wes
15、t 42ndStreet, NewYork, NY 10036.*A Summary of Changes section appears at the end of this standardCopyright ASTM International, 100 Barr Harbor Drive, PO Box C700, West Conshohocken, PA 19428-2959. United States14.1.4 Thickness, width, and length,4.1.5 Surface treatment (see 8.2),4.1.6 Whether inspec
16、tion is required at the manufacturersworks (see 13.1), and4.1.7 Whether certification of the material by the vendor isrequired (Section 15).5. Chemical Composition5.1 The sheet and plate shall conform to the chemicalrequirements in Table 1.6. Tensile Properties6.1 The sheet and plate shall conform t
17、o the tensile require-ments in Table 2 Table 3 unless another agreement is madebetween seller and purchaser. Properties for sizes and tempersnot shown in Table 2 Table 3 shall be as agreed upon by sellerand purchaser.7. Dimensional Tolerances7.1 Variations from the specified thickness shall not exce
18、edthe amounts prescribed in ANSI H35.2/ANSI 35.2(M) Table7.7a.7.2 Variations from the specified width shall not exceed theamounts prescribed in ANSI 35.2/ANSI 35.2(M) Tables 7.8,7.10 and 7.11.7.3 Variations from the specified length shall not exceed theamounts prescribed in ANSI H35.2/ ANSI H35.2(M)
19、 Tables7.9 and 7.10.7.4 Squareness of sheet and plate shall conform to therequirements of ANSI H35.2/ ANSI H35.2(M) Table 7.14.7.5 Flatness of sheet and plate shall conform to the require-ments of Table 4 Table 5.7.6 Lateral bow of sheet and plate shall conform to therequirements of ANSI H35.2/ ANSI
20、 H35.2(M) Tables 7.12 and7.13.8. Workmanship, Finish, and Appearance8.1 All sheet and plate shall be commercially flat and free ofbuckles, shall be free of injurious surface defects, and have aworkmanlike finish.8.2 The sheet or plate shall be supplied in the finishspecified by the purchaser. One of
21、 the following finishes shouldbe specified:TABLE 1 Chemical Composition LimitsANOTE 1Analysis shall regularly be made only for the elements specifically mentioned in this table. If, however, the presence of other elements issuspected or indicated in amounts greater than the specified limits, further
22、 analysis shall be made to determine that these elements are not present in excessof the specified limits.NOTE 2The following applies to all specified limits in this table: For purposes of acceptance and rejection, an observed value or a calculated valueobtained from analysis should be rounded to th
23、e nearest unit in the last right-hand place of figures used in expressing the specified limit.Composition %AAl Mn R.E. Zn Zr Ca Cu Fe Ni Si Each Total MgAZ31B 2.5-3.5 0.20-1.0 . . . 0.6-1.4 . . . 0.04 0.05 0.005 0.005 0.10 . . . 0.30 RemainderZE10A . . . . . . 0.12-0.22 1.0-1.5 . . . . . . . . . . .
24、 . . . . . . . . . . 0.30 RemainderALimits are in weight percent maximum unless shown as a range.TABLE 2 Tensile RequirementsNOTE 1For purposes of determining conformance with this specification, each value for tensile strength and yield strength shall be rounded to thenearest 0.1 ksi, and each valu
25、e for elongation shall be rounded to the nearest 0.5 %, both in accordance with the rounding method of Practice E29.Alloy and Temper Specified Thickness, in. Tensile Strength, min, ksiYield Strength (0.2 %Offset), min, ksiElongation in 2 in.,or 4 dia min, %AZ31B-O 0.0160.500 32.0A. 120.5012.000 32.0
26、A. 102.0013.000 32.0A. 9AZ31B-H24 0.0160.249 39.0 29.0 60.2500.374 38.0 26.0 80.3750.500 37.0 24.0 80.5011.000 36.0 22.0 81.0012.000 34.0 20.0 82.0013.000 34.0 18.0 8AZ31B-H26 0.2500.374 39.0 27.0 60.3750.500 38.0 26.0 60.5010.750 37.0 25.0 60.7511.000 37.0 23.0 61.0011.500 35.0 22.0 61.5012.000 35.
27、0 21.0 6ZE10A-O 0.016-0.066 30.0 18.0 150.067-0.250 30.0 15.0 150.251-0.500 29.0 12.0 12ATensile strength shall be 40.0 ksi max.B90/B90M 1528.2.1 Mill finish,8.2.2 Mill finish and oiled,8.2.3 Chrome pickled, or8.2.4 Chrome pickled and oiled.9. Sampling for Chemical Analysis9.1 IngotAt least one samp
28、le shall be taken for each groupof ingots of the same alloy poured from the same source ofmolten metal and analyzed to determine conformance to Table1. Ingots not conforming shall be rejected.9.2 Finished ProductUnless compliance is established by9.1, sampling of the finished product shall be accord
29、ing toPractice E55. One sample shall be taken for 4000 lb 1815 kgor less of material comprising the lot, except that not more thanone analysis shall be required per piece.10. Sampling for Tensile Properties10.1 Number of TestsOne tension test specimen shall betaken from a sheet representing 1000 lb
30、455 kg sheet or froma plate representing each 2000 lb 905 kg of plate of the samealloy, temper, and thickness in the shipment or such otherquantity as may be agreed upon by the seller and purchaser.10.2 Location of SpecimensTension test specimens shallbe taken parallel to the direction of rolling. T
31、he specimen shallbe taken midway between the two plate surfaces for plate inthicknesses of 0.500 through 1.500 in. 12.50 though 40 mmand midway between the center and the surface of plate over1.500 in. 40 mm in thickness.10.3 Types of SpecimensFor sheet and plate less than0.500 in. 12.50 mm thick th
32、e standard sheet-type specimenTABLE 3 Tensile Requirements MetricAAlloy andTemperSpecifiedThickness, mmTensileStrength, MPaBYield Strength(0.2 % offset), MPaElongation, min %Over Through Min Max Min in 50 mmCin 5 dia(5.65 V A)AZ31B-O 0.40 12.50 221 275 . . . 12 . . .12.50 50.00 221 275 . . . . . . 9
33、50.00 80.00 221 275 . . . . . . 8AZ31B-H24 0.40 6.30 269 . . . 200 6 . . .6.30 10.00 262 . . . 179 8 . . .10.00 12.50 255 . . . 165 8 . . .12.50 25.00 248 . . . 152 . . . 725.00 50.00 234 . . . 138 . . . 750.00 80.00 234 . . . 124 . . . 7AZ31B-H26 6.30 10.00 269 . . . 186 6 . . .10.00 12.50 262 . .
34、. 179 6 . . .12.50 20.00 255 . . . 172 . . . 520.00 25.00 255 . . . 159 . . . 525.00 40.00 241 . . . 152 . . . 540.00 50.00 241 . . . 148 . . . 5ZE10A-O 0.41 1.52 207 124 151.53 6.35 207 103 156.36 12.7 200 83 12AThe basis for establishment of mechanical property limits as shown in Appendix X1.BTo d
35、etermine conformance to this specification each value for tensile strength shall be rounded to the nearest 1 MPa and each value for elongation to the nearest 0.5 %,both in accordance with the rounding-off method of Practice E29.CElongation in 50 mm apply for thicknesses up through 12.50 mm and in 5
36、diameter (5.65 V A) for thicknesses over 12.50 mm where A is the cross-sectional area ofthe specimen.TABLE 4 Flatness TolerancesMagnesium Flat Sheet and PlateSpecifiedThickness, in.Maximum Variation from Flat,Ain.AZ31B (-0 and-H24 tempers) andZE10A-OAZ31B (-H26temper)In any1ftBIn any3ftBIn any1ftBIn
37、 any3ftBUnder 0.126 commercially flat0.1260.250 0.020 0.030 0.020 0.0300.2510.500 0.024 0.036 0.025 0.0380.5011.000 0.030 0.045 0.050 0.0751.0012.000 0.040 0.060 0.050 0.075AAs measured with the plate resting on a flat surface, concave side upward, usinga straightedge and a feeler gauge, dial gauge,
38、 or scale.BStandard measurement is on the 3-ft basis. Widths and lengths less than 3 ft, butmore than 1 ft, have tolerances proportionately less than those for 3 ft, but notsmaller than for any 1 ft. Widths and lengths less than 1 ft have tolerancesproportionately less than those for any 1 ft.TABLE
39、5 Flatness Tolerances, Magnesium Flat Sheet and PlateMetricSpecifiedThickness, mmOver ThroughMaximum Variation from FlatAmmAZ31B(O and H24Tempers)AZ31B(H26 Temper)In Any300mmBIn Any900mmBIn Any300mmBIn Any900mmB03.203.206.30 0.50 0.75 0.50 0.756.3012.50 0.60 0.90 0.63 0.9512.5025.00 0.75 1.10 1.25 1
40、.9025.0050.00 1.00 1.50 1.25 1.90AAs measured with the plate resting on a flat surface, concave side upward, usinga straightedge and a feeler gauge, dial gauge, or scale.BStandard measurement is on the 900 mm basis. Widths and lengths less than900 mm but more than 300 mm have tolerances proportionat
41、ely less than those for900 mm, but not smaller than for any 300 mm. Widths and lengths less than 300mm have tolerances proportionately less than those for any 300 mm.B90/B90M 153shown in Figure 6 of Test Methods B557 B557M shall beused, or for plate 0.500 in. 12.5 mm and over those in Figure9 of Tes
42、t Methods B557 B557M shall be used. If it isnecessary to use specimens smaller than the standardspecimens, they shall have dimensions proportional to those ofFigure 9 of Test Methods B557 B557M but not less than thefollowing dimensions: reduced section,14-in. 41.25-mmdiameter by 1-in. 20.00-mm gauge
43、 length; grip ends,38-in.9.5-mm diameter; total length, 238 in. 60.3 mm withshouldered ends, 3 in. 76.2 mm with threaded ends, and 4 in.101.6 mm if tested with plain cylindrical ends. If material lessthan34 in. 19.0 mm in width is tested in full section becausethe specimens in Figure 9 of Test Metho
44、ds B557 B557Mcannot be used, the elongation shall not be determined.11. Methods of Chemical Analysis11.1 Any suitable method of chemical analysis may be used.In case of dispute, the analysis shall be made by methods givenin Test Methods B954 or any other standard methods ofanalysis approved by ASTM
45、unless some other method isagreed upon.12. Methods of Tension Testing12.1 Tension TestsThe tension tests shall be made inaccordance with Test Methods B557 B557M.NOTE 1The values obtained for the tensile properties covered by thisspecification are not seriously affected by variations in speed of test
46、ing. Aconsiderable range of testing speed is permissible; however, the rate ofstressing to the yield strength should not exceed 100 ksi/min 690 MPa,and above the yield strength, the movement per minute of the head underload should not exceed 0.5 in./in. mm/mm of gauge length (or distancebetween grip
47、s for specimens not having reduced sections). Care must beexercised, especially when making yield strength determinations, that thespeed of testing does not exceed the ability of the strain and load-indicating equipment to function satisfactorily.12.2 RetestsIf any tension specimen fails to conform
48、tothe requirements prescribed in Table 2 Table 3, two additionalspecimens shall be selected and tested from other sheet or platein the lot. If either of these specimens fails to conform to theapplicable requirements, the material may be rejected. If,however, the failure of the specimens to conform t
49、o therequirements is the result of an inadequate thermal treatment,the material may be reheat treated and resampled in accordancewith Section 9. Only one such reworking of the material shallbe permitted.13. Inspection13.1 If the purchaser desires that his representative inspector witness the inspection of material prior to shipment, suchagreement shall be made by the purchaser and producer as partof the purchase contract.13.2 When such inspection or witness of inspection
