fine grain practice and includes microalloying elements such as columbium,vanadium,zirconium,etc.The steel may be treated to achieve inclusion control.
4.2Cold-rolled steel sheet is supplied for either expod or unexpod applications.Within the latter category,cold-rolled sheet is specified either “temper rolled”or “annealed last.”For details on processing,attributes and limitations,and inspection standards,refer to Specification A 568/A 568M.
5.Ordering Information
5.1It is the purchar’s responsibility to specify in the purcha order all ordering information necessary to describe the required material.Examples of such information include,but are not limited to,the following:
5.1.1ASTM specification number and year of issue,
5.1.2Name of material and designation (cold-rolled steel sheet)(include grade,type,and class,as appropriate,for CS,DS,DDS,EDDS,SS,HSLAS,or HSLAS-F)(e 4.1),
5.1.2.1When a type is not specified for CS or DS,Type B will be furnished (e 4.1),
5.1.2.2When a class is not specified for HSLAS,Class 1will be furnished (e 4.1),
5.1.2.3When a type is not specified for SS33[230]and SS40[275],Type 1will be furnished (e 4.1),
5.1.3Classification (either expod,unexpod,temper rolled,or annealed last)(e 4.2),5.1.4Finish (e 9.1),
5.1.5Oiled or not oiled,as required (e 9.2),
5.1.6Dimensions (thickness,thickness tolerance table (e 5.1.
6.1),width,and whether cut lengths or coils),
5.1.
6.1As agreed upon between the purchar and the producer,material ordered to this specification will be supplied to meet the applicable thickness tolerance table shown in Specification A 568/A 568M,
N OTE 2—Not all producers are capable of meeting all the limitations of the thickness tolerance tables in Specification A 568/A 568M.The pur-
char should contact the producer regarding possible limitations prior to placing an order.
5.1.7Coil size (must include inside diameter,outside diam-eter,and maximum weight),
5.1.8Copper bearing steel (if required),5.1.9Quantity,
5.1.10Application (part identification and description),5.1.11Special requirements (if required),or supplementary requirement S1for HSLAS,and
5.1.12A report of heat analysis will be supplied,if re-quested,for CS,DS,DDS,and EDDS.For materials with required mechanical properties,SS,HSLAS,and HSLAS-F,a report is required of heat analysis and mechanical properties as determined by the tension test.
N OTE 3—A typical ordering description is as follows:ASTM A 1008-XX,cold rolled steel sheet,CS Type A,expod,matte finish,oiled,0.035by 30in.by coil,ID 24in.,OD 48in.,max weight 15000lbs,thickness tolerance Table 18of Specification A 568/A 568M,100000lb,for part No.4560,:
ASTM A 1008M-XX,cold-rolled steel sheet,SS grade 275,unexpod,matte finish,oiled,0.88mm by 760mm by 2440mm,thickness tolerance Table A1.15of Specification A 568/A 568M,10000kg,for shelf bracket.
6.General Requirements for Delivery
6.1Material furnished under this specification shall con-form to the applicable requirements of the current edition of Specification A 568/A 568M unless otherwi provided herein.
7.Chemical Composition
7.1The heat analysis of the steel shall conform to the chemical composition requirements of the appropriate desig-nation shown in Table 1for CS,DS,DDS,and EDDS and in Table 2for SS,HSLAS,and HSLAS-F.
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7.2Each of the elements listed in Table 1and Table 2shall be included in the report of the heat analysis.When the amount of copper,nickel,chromium,or molybdenum is less than
TABLE 1Chemical Composition A
For Cold Rolled Steel Sheet Designations CS,DS,DDS,and EDDS
Composition,%Heat Analysis
(Element Maximum Unless Otherwi Shown
Designation C Mn P S Al Si Cu B Ni B Cr B ,C Mo B V Cb Ti N CS Type A D ,E ,F ,G 0.100.600.0300.035
......0.20H 0.200.150.060.0080.0080.008I ...CS Type B D 0.02to 0.150.600.0.20H 0.200.150.060.0080.0080.008I ...CS Type C D ,E ,F ,G 0.080.600.0.20H 0.200.150.060.0080.0080.008I ...DS Type A E ,J 0.080.500.0200.0300.01min ...0.200.200.150.060.0080.0080.008I ...DS Type B 0.02to 0.080.500.0200.0300.02min ...0.200.200.150.060.0080.0080.008I ...DDS F ,G 0.060.500.0200.0250.01min ...0.200.200.150.060.0080.0080.008I ...EDDS K
0.02
0.40
0.020
0.020
0.01min
...
0.10
0.10
0.15
0.03
0.008
0.10
0.15
...
A Where an ellipsis (...)appears in the table,there is no requirement,but the analysis result shall be reported.
B
The sum of copper,nickel,chromium,and molybdenum shall not exceed 0.50%on heat analysis.When one or more of the elements is specified by the purchar,the sum does not apply,in which ca only the individual limits on the remaining elements shall apply.C
Chromium is permitted,at the producer’s option,to 0.25%maximum when the carbon content is less than or equal to 0.05%.In such ca the limit on the sum of the four elements in Footnote B does not apply.D
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When an aluminum deoxidized steel is required for the application,Commercial Steel (CS)may be ordered to a minimum of 0.01%total aluminum.E
Specify Type B to avoid carbon levels below 0.02%.F
May be furnished as a vacuum degasd or chemically stabilized steel,or both,at the producer’s option.G
For carbon levels less than or equal to 0.02%,columbium or titanium,or both,may be ud as stabilizing elements at the producer’s option.In such cas,the applicable limit for columbium shall be 0.10%max.and the limit on titanium shall be 0.15%max.H
When copper steel is specified,the copper limit is a minimum requirement.When copper steel is not specified,the copper limit is a maximum requirement.I
Except for EDDS,titanium is permitted,at producer’s option,to 0.025%provided the ratio of %titanium to %nitrogen does not exceed 3.4.J
DS Type A may be furnished as a vacuum degasd steel,at the producers option.K谁会记得六哲
Shall be furnished as a vacuum degasd and stabilized
steel.
0.02%,the analysis may be reported as <0.02%.When the amount of vanadium,columbium,or titanium is less than 0.008%,the analysis may be reported as <0.008%.
7.3Sheet steel grades defined by this specification are suitable for welding if appropriate welding conditions are lected.For certain welding process,more restrictive com-position limits may be desirable and should be requested at the time of inquiry and ordering.
8.Mechanical Properties
8.1CS,DS,DDS,and EDDS :
8.1.1Typical nonmandatory mechanical properties for CS,DS,DDS and EDDS are shown in Table 3.8.1.2The material shall be capable of being bent,at room temperature,in any direction through 180°flat on itlf without cracking on the outside of the bent portion (e Section 14of Test Methods and Definitions A 370).
8.1.3Sheet of the designations except for EDDS may be subject to aging dependent upon processing factors such as the method of annealing (continuous annealing or box annealing),and chemical composition.For additional information on aging,e Appendix X1of Specification A 568/A 5
68M.8.1.4EDDS steel is stabilized to be nonaging and so is not subject to stretcher strains and fluting.Other steels may be procesd to be nonaging;plea consult your supplier.
TABLE 2Chemical Composition A
For Cold Rolled Steel Sheet Designations SS,HSLAS,and HSLAS-F
%Heat Analysis,Element Maximum unless otherwi shown
Designation
C Mn P
S Al Si Cu B ,C Ni B Cr B
Mo B V Cb N SS:Grade 25[170]0.200.600.0.200.200.150.060.Grade 30[205]0.200.600.0.200.200.150.060.Grade 33[230]Type 10.200.600.0.200.200.150.060.Grade 33[230]Type 20.150.600.0.200.200.150.060.Grade 40[275]Type 10.200.900.0.200.200.150.060.Grade 40[275]Type 2
0.150.600.0.200.200.150.060.Grade
80[550]
0.20
0.60
0.035
0.035
...
...
0.20
0.20
0.15
0.06
0.008
0.008
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HSLAS:D
Grade 45[310]Class 10.22 1.650.0.200.200.150.060.01min 0.005min ...Grade 45[310]Class 20.15 1.650.0.200.200.150.060.01min 0.005min ...Grade 50[340]Class 10.23 1.650.0.200.200.150.060.01min 0.005min ...Grade 50[340]Class 20.15 1.650.0.200.200.150.060.01min 0.005min ...Grade 55[380]Class 10.25 1.650.0.200.200.150.060.01min 0.005min ...Grade 55[380]Class 20.15 1.650.0.200.200.150.060.01min 0.005min ...Grade 60[410]Class 10.26 1.650.0.200.200.150.060.01min 0.005min ...Grade 60[410]Class 20.15 1.650.0.200.200.150.060.01min 0.005min 0.020Grade 65[450]Class 10.26 1.650.0.200.200.150.060.01min 0.005min 0.012Grade 65[450]Class 20.15 1.650.040.04..
吃猪心有什么好处和坏处....0.200.200.150.060.01min 0.005min 0.020Grade 70[780]Class 10.26 1.650.0.200.200.150.060.01min 0.005min 0.012Grade 70[780]
Class 20.15 1.650.0.200.200.150.060.01min 0.005min 0.020
HSLAS-F:E
Grade 50[340],60[410],70[480],and 80[550]
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0.15 1.650.0.200.200..
A Where an ellipsis (...)appears in the table,there is no requirement but,the analysis shall be reported.
B
The sum of copper,nickel,chromium,and molybdenum shall not exceed 0.50%.When one or more of the elements are specified by the purchar,the sum does not apply,in which ca,only the individual limits on the remaining unspecified elements will apply.C
When copper is specified,the copper limit is a minimum requirement.When copper steel is not specified,the copper limit is a maximum requirement.D
For HSLAS steels,columbium and vanadium may be added singly or in combination.E
The steels shall also contain one or more of the following elements:Vanadium,Titanium,and Columbium.Other alloying elements may be prent,but are not required.
TABLE 3Typical Ranges of Mechanical Properties A
(Nonmandatory)B
For Cold Rolled Steel Sheet Designations CS,DS,DDS and EDDS
Designation
Yield Strength C
Elongation in 2in.[50
mm]%C
r m Value D n -Value E
ksi
MPa
CS Types A,B,and C 20to 40[140to 275]$30F F
DS Types A and B 22to 35[150to 240]$36 1.3to 1.70.17to 0.22DDS 17to 29[115to 200]$38 1.4to 1.80.20to 0.25EDDS
15to 25
[105to 170]
$40
1.7to
2.10.23to 0.27
A
The typical mechanical properties apply to the full range of steel sheet thickness.The yield strength tends to increa,the elongation decreas and some of the formability values tend to decrea as the sheet thickness decreas.B
The typical mechanical property values prented here are nonmandatory.They are provided to assist the purchar in specifying a suitable steel for a given application.Values outside of the ranges are to be expected.C
Yield Strength and elongation are measured in the longitudinal direction in accordance with Test Methods A 370.D
Average plastic strain ratio (r m value)as determined by Test Method E 517.E
The strain hardening exponent (n-value)as determined by Test Method E 646.F
No typical properties have been
established.
8.2SS,HSLAS and HSLAS-F :
8.2.1The available strength grades for SS,HSLAS and HSLAS-F are shown in Table 4.8.2.2Tension Tests :
8.2.2.1Requirements —Material as reprented by the test specimen shall conform to the mechanical property require-ments specified in Table 4.The requirements do not apply to the uncropped ends of unprecesd coils.
8.2.2.2Number of Tests —Two tension tests shall be made from each heat or from each 50tons [45000kg].When the amount of finished material from a heat is less than 50tons [145000kg],one test shall be made.When material rolled from heat differs 0.050in.[1.27mm]or more in thickness,one tension test shall be made from the thickest and thinnest matereial regardless of the weight reprented.
8.2.2.3Tension test specimens shall be taken at a point immediately adjacent to the material to be qualified.
8.2.2.4Tension test specimens shall be taken from the full thickness of the sheet.
8.2.2.5Tension test specimens shall be taken from a loca-tion approximately halfway between the center of the sheet and the edge of the material as rolled.
8.2.2.6Tension test samples shall be taken with the length-wi axis of the test specimen parallel to the rolling direction (longitudinal test).
8.2.2.7Test Method —Yield strength shall be determined by either the 0.2%offt method or the 0.5%extension under load method unless otherwi specified.8.2.3Bending Properties :
8.2.3.1The suggested minimum inside radii for cold bend-ing are listed in Appendix X1and is discusd in more detail in Specification A 568/A 568M (Section 6).Where a tighter bend radius is required,where curved or offt bends are involved,or where stretching or drawing are also a consider-ation,the producer should be consulted.
9.Finish and Appearance 9.1Surface Finish :
9.1.1Unless otherwi specified,the sheet shall have a matte finish.When required,a controlled surface texture and condition may be specified.
For additional information e “Finish and Condition”c-tion of Specification A 568/A 568M.9.2Oiling :
9.2.1Unless otherwi specified,the sheet shall be oiled.9.2.2When required,the sheet may be specified to be furnished not oiled (dry).
10.Retests and Resamples
10.1Retests —If the results on an original tension test specimen are within 2ksi [14MPa]of the required tensile strength,within 1ksi [7MPa]of the required yield point,or within two percentage points of the required elongation,a retest shall be permitted for which one test specimen lected at random shall be tested.If the results of this retest specimen satisfy the specified mechanical properties and all other re-quirements of the applicable specification are satisfied,the material shall be accepted.Retests are permitted in accordance
弹琴刘长卿TABLE 4Mechanical Property Requirements A
For Cold Rolled Steel Sheet Designations SS,HSLAS,and HSLAS-F
Designation
Yield Strength,min
Tensile Strength,min
Elongation 50mm,min,%
ksi
[MPa]ksi [MPa]SS:
Grade 25[170]25[170]42[290]26Grade 30[205]
30[205]45[310]24Grade 33[230]Types 1and 233[230]48[330]22Grade 40[275]Types 1and 240[275]52[360]20
Grade 80[550]
80B
[550]
82
[565]
C
HSLAS:Grade 45[310]Class 145[310]60[410]22Grade 45[310]Class 245[310]55[380]22Grade 50[340]Class 150[340]65[450]20Grade 50[340]Class 250[340]60[410]20Grade 55[380]Class 155[380]70[480]18Grade 55[380]Class 255[380]65[450]18Grade 60[410]Class 160[410]75[520]16Grade 60[410]Class 260[410]70[480]16Grade 65[450]Class 165[450]80[550]15Grade 65[450]Class 265[450]75[520]15Grade 70[480]Class 170[480]85[585]14Grade 70
[480]Class 270[480]80[550]14
HSLAS-F:
Grade 50[340]50[340]60[410]22Grade 60[410]60[410]70[480]18Grade 70[480]70[480]80[550]16Grade 80[550]
80[550]90[620]14
A For coil products,testing by the producer is limited to the end of the coil.Mechanical properties throughout the coil shall comply with the minimum values specified.B
On this full-hard product,the yield strength approaches the tensile strength and since there is no halt in the gage or drop in the beam,the yield point shall be taken as the yield stress at 0.5%extension under load.C
There is no requirement for elongation in 2in.for SS Grade
80.
with Specification A568/A568M.
10.2Resamples—Resamples are permitted in accordance with Specification A568/A568M.
11.Certification
11.1A report of heat analysis shall be supplied,if requested, for CS,DS,DDS,and EDDS steels.For material with required mechanical properties,SS,HSLAS,and HSLAS-F,a report is required of heat analysis and mechanical properties as deter-mined by the tension test.
11.2The report shall include the purcha order number,the ASTM designation number and year date,product designation, grade,type or class,as applicable,the heat number,and as required,heat analysis and mechanical properties as indicated by the tension test.
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11.3A signature is not required on the test report.However, the document shall clearly identify the organization submitting the report.Notwithstanding the abnce of a signature,the organization submitting the report is responsible for the content of the report.
11.4A Material Test Report,Certificate of Inspection,or similar document printed from or ud in electronic form from an electronic data interchange(EDI)transmission shall be regarded as having the same validity as a counterpart printed in the certifier’s facility.The content of the EDI transmitted document must meet the requirements of the invoked ASTM standard(s)and conform to any existing EDI agreement be-tween the purchar and the supplier.Notwithstanding the abnce of a signature,the organization submitting the EDI transmission is responsible for the content of the report. 12.Product Marking
12.1In addition to the requirements of Specification A568/ A568M,each lift or coil shall be marked with the designation shown on the order{CS(Type A,B,or C),DS(Type A or B), DDS,EDDS,SS,HSLA
S,or HSLAS-F}.The designation shall be legibly stenciled on the top of each lift or shown on a tag attached to each coil or shipping unit.
13.Keywords
13.1carbon steel sheet;cold-rolled steel sheet;steel sheet; commercial steel;drawing steel;deep drawing steel;extra deep drawing steel;high-strength low-alloy steel;high-strength low-alloy steel with improved formability;structural steel
SUPPLEMENTARY REQUIREMENTS
FOR COLD ROLLED HSLAS STEEL SHEET
The following supplementary requirements shall apply when specified in the order or contract:
S1.Elements
S1.1When a purchar prefers to designate the specific elements(columbium,vanadium,nitrogen,or combinations thereof),one of the types listed below shall be specified.The type,in addition to the grade,must be shown on the order:
Type1—Columbium
Type2—Vanadium
Type3—Columbium and Vanadium
Type4—Vanadium and Nitrogen
S1.2The composition limits of Section7shall apply for any of the
elements.
