ASTM_A709_A709M-09

Designation:A709/A709M–09

Standard Speciﬁcation for

Structural Steel for Bridges1

This standard is issued under theﬁxed designation A709/A709M;the number immediately following the designation indicates the year of original adoption or,in the case of revision,the year of last revision.A number in parentheses indicates the year of last reapproval.

A superscript epsilon(´)indicates an editorial change since the last revision or reapproval.

1.Scope*

1.1This speciﬁcation covers carbon and high-strength low-alloy steel structural shapes,plates,and bars and quenched and tempered alloy steel for structural plates intended for use in bridges.Seven grades are available in four yield strength levels as follows:

Grade U.S.[SI]Yield Strength,ksi[MPa] 36[250]36[250]

50[345]50[345]

50S[345S]50[345]

50W[345W]50[345]

HPS50W[HPS345W]50[345]

HPS70W[HPS485W]70[485]

HPS100W[HPS690W]100[690]

1.1.1Grades36[250],50[345],50S[345S],and50W [345W]are also included in Speciﬁcations A36/A36M, A572/A572M,A992/A992M,and A588/A588M,respec-tively.When the supplementary requ

irements of this speciﬁ-cation are speciﬁed,they exceed the requirements of Speciﬁ-cations A36/A36M,A572/A572M,A992/A992M,and A588/A588M.

1.1.2Grades50W[345W],HPS50W[HPS345W],HPS 70W[HPS485W],and HPS100W[HPS690W]have en-hanced atmospheric corrosion resistance(see13.1.2).Product availability is shown in Table1.

1.2Grade HPS70W[HPS485W]or HPS100W[HPS 690W]shall not be substituted for Grades36[250],50[345], 50S[345S],50W[345W],or HPS50W[HPS345W].Grade 50W[345W],or HPS50W[HPS345W]shall not be substi-tuted for Grades36[250],50[345]or50S[345S]without agreement between the purchaser and the supplier.

1.3When the steel is to be welded,it is presupposed that a welding procedure suitable for the grade of steel and intended use or service will be utilized.See Appendix X3of Speciﬁca-tion A6/A6M for information on weldability.

1.4For structural products to be used as tension components requiring notch toughness testing,standardized requirements are provided in this standard,and they are based upon American Association of State Highway and Transportation Officials(AASHTO)requirements for both fracture critical and non-fracture critical members.

1.5Supplementary requirements are available but shall apply only if speciﬁed in the purchase order.

1.6The values stated in either SI units or inch-pound units are to be regarded separately as standard.The values stated in each system may not be exact equivalents;therefore,each system shall be used independently of the other.Combining values from the two systems may result in non-conformance with the standard.

1.7For structural products produced from coil and fur-nished without heat treatment or with stress relieving only,the additional requirements,including additional testing require-ments and the reporting of additional test results,of Speciﬁ-cation A6/A6M apply.

2.Referenced Documents

2.1ASTM Standards:2

A6/A6M Speciﬁcation for General Requirements for Rolled Structural Steel Bars,Plates,Shapes,and Sheet Piling

A36/A36M Speciﬁcation for Carbon Structural Steel

A370Test Methods and Deﬁnitions for Mechanical Testing of Steel Products

A572/A572M Speciﬁcation for High-Strength Low-Alloy Columbium-Vanadium Structural Steel

A588/A588M Speciﬁcation for High-Strength Low-Alloy Structural Steel,up to50ksi[345MPa]Minimum Yield Point,with Atmospheric Corrosion Resistance

A673/A673M Speciﬁcation for Sampling Procedure for Impact Testing of Structural Steel

A992/A992M Speciﬁcation for Structural Steel Shapes

1This speciﬁcation is under the jurisdiction of ASTM Committee A01on Steel,

Stainless Steel and Related Alloys and is the direct responsibility of Subcommittee A01.02on Structural Steel for Bridges,Buildings,Rolling Stock and Ships.

Current edition approved April1,2009.Published April2009.Originally approved in1974.Last previous edition approved in2008as A709/A709M–08.

2For referenced ASTM standards,visit the ASTM website,,or contact ASTM Customer Service at For Annual Book of ASTM Standards volume information,refer to the standard’s Document Summary page on the ASTM website.

G 101Guide for Estimating the Atmospheric Corrosion Resistance of Low-Alloy Steels

3.Terminology

3.1Deﬁnitions of Terms Speciﬁc to This Standard:

3.1.1fracture critical member —a main load-carrying ten-sion member or tension component of a bending member whose failure would be expected to cause collapse of a structure or bridge without multiple,redundant load paths.3.1.2main load-carrying member —a steel member de-signed to carry primary design loads,including dead,live,impact,and other loads.

3.1.3non-fracture critical member —a main load-carrying member whose failure would not be expected to cause collapse of a structure or bridge with multiple,redundant load paths.3.1.4non-tension component —a steel member that is not in tension under any design loading.

3.1.5secondary member —a steel member used for aligning and bracing of main load-carrying mem

bers,or for attaching utilities,signs,or other items to them,but not to directly support primary design loads

3.1.6tension component —a part or element of a fracture critical or non-fracture critical member that is in tension under various design loadings.

TABLE 1Tensile and Hardness Requirements A

N OTE 1—Where “...”appears in this table,there is no requirement.

Grade

Plate Thickness,

in.[mm]

Structural Shape Flange

or Leg

Thickness,in.[mm]

Yield Point or Yield Strength,B

ksi [MPa]Tensile Strength,ksi [MPa]

Minimum Elongation,%

Reduc-tion of Area C ,D min,%Plates and Bars C ,E Shapes E

< 50mm 36[250]to 4[100],incl to 3in.[75mm],incl 36[250]min 58–80[400–ver 3in.[75mm]36[250]min 58[400]min .....50[345]to 4[100],incl

all 50[345]min

65[450]min 18211821F ...50S [345S]

all 50–65[345–450]HI 65[450]H min ......

50W [345W]and HPS 50W [HPS 345W]to 4[100],incl all

50[345]min

70[485]min

21J

...

HPS 70W [HPS 485W]to 4[100],incl G

70[485]min B 85–110[585–760]...19K .........

HPS 100W [HPS 690W]

to 21⁄2[65],incl G

100[690]min B

110–130[760–895]

...

18K

...

A See specimen orientation and preparation subsection in the Tension Tests section of Speciﬁcation A 6/A 6M .B

Measured at 0.2%offset or 0.5%extension under load as described in Section 13of Test Methods A 370.C

Elongation and reduction of area not required to be determined for ﬂoor plates.D

For plates wider than 24in.[600mm],the reduction of area requirement,where applicable,is reduced by ﬁve percentage points.E

For plates wider than 24in.[600mm],the elongation requirement is reduced by two percentage points.See elongation requirement adjustments in the Tension Tests section of Speciﬁcation A 6/A 6M .F

Elongation 50mm:19%for shapes with ﬂange thickness over 3in.[75mm].G

Not applicable.H

The yield to tensile ratio shall be 0.87or less for shapes that are tested from the web location;for all other shapes,the requirement is 0.85.I

A maximum yield strength of 70ksi [480MPa]is permitted for structural shapes that are required to be tested from the web location.J

For wide ﬂange shapes with ﬂange thickness over 3in.[75mm],elongation 50mm of 18%minimum applies.K

If measured on the Fig.3(Test Methods A 370)11⁄2-in.[40–mm]wide specimen,the elongation is determined in 50-mm gage length that includes the fracture and shows the greatest elongation.L

40%minimum applies if measured on the Fig 3(Test Methods A 370)11⁄2-in.[40-mm]wide specimen;50%minimum applies if measured on the Fig.4(Test Methods A 370)1⁄2-in.[12.5-mm]round specimen.

TABLE 2Grade 36[250]Chemical Requirements (Heat Analysis)

N OTE 1—Where “...”appears in this table there is no requirement.The heat analysis for manganese shall be determined and reported as described in the Heat Analysis section of Speciﬁcation A 6/A 6M .

Product Thickness,in.(mm)

Shapes A

All Plates B

Bars B

To 3⁄4

[20],incl Over 3⁄4

to 11⁄2[20to 40],incl Over 11⁄2to 21⁄2[40to 65],incl Over 21⁄2to 4[65to 100],incl To 3⁄4[20],incl Over 3⁄4to 11⁄2[20to 40],incl Over 11⁄2to 4[100],incl Carbon,max,%0.260.250.25

0.26

0.27

0.260.27

0.28

Manganese,%

......0.80–1.200.80–1.200.85–0.60–0.900.60–0.90Phosphorus,max,%0.040.040.040.040.040.040.040.04Sulfur,max,%0.05

0.05

Silicon,%

0.40max 0.40max 0.40max 0.15–0.40

0.15–0.400.40max 0.40max 0.40max Copper,min,%when

copper steel is speciﬁed

0.20

说出你的故事20110.20

0.20

A Manganese content of 0.85to 1.35%and silicon content of 0.15to 0.40%is required for shapes with ﬂange thickness over 3in.[75mm].

For each reduction of 0.01%below the speciﬁed carbon maximum,an increase of 0.06%manganese above the speciﬁed maximum will be permitted up to a maximum of 1.35%.

4.Ordering Requirements

4.1In addition to the items listed in the ordering informa-tion section of Speciﬁcation A 6/A 6M ,the following items should be considered if applicable:

TABLE 3Grade 50[345]Chemical Requirements A (Heat Analysis)

Silicon C

Columbium,Vanadium and Nitrogen

Maximum Diameter,Thickness,or Distance Between Parallel Faces,in.[mm]

Carbon,max,%

Manganese,B

max,%

Phosphorus,max,%

Sulfur,max,%

Plates to

11⁄2-in.[40-mm]

Thick,Shapes with ﬂange or leg thickness to 3in.[75mm]

inclusive,Sheet Piling,Bars,Zees,and Rolled Tees,max,%D

Plates Over 11⁄2-in.[40-mm]Thick and Shapes with ﬂange thickness over 3in.[75mm],%4[100]

戏剧文学

学习经验总结0.23 1.350.040.05

0.40

0.15–0.40

A Copper when speciﬁed shall have a minimum content of 0.20%by heat analysis (0.18%by product analysis).

Manganese,minimum by heat analysis of 0.80%(0.75%by product analysis)shall be required for all plates over 3⁄8in.[10mm]in thickness;a minimum of 0.50%(0.45%by product analysis)shall be required for plates 3⁄8in.[10mm]and less in thickness,and for all other products.The manganese to carbon ratio shall not be less than 2to 1.For each reduction of 0.01percentage point below the speciﬁed carbon maximum,an increase of 0.06percentage point manganese above the speciﬁed maximum is permitted,up to a maximum of 1.60%.C

Silicon content in excess of 0.40%by heat analysis must be negotiated.D

Bars over 11⁄2in.[40mm]in diameter,thickness,or distance between parallel faces,shall be made by a killed steel practice.E

Alloy content shall be in accordance with Type 1,2,3,or 5and the contents of the applicable elements shall be reported on the test report.

Type Elements

Heat Analysis,%1Columbium A 0.005–0.05B 2Vanadium 0.01–0.153

Columbium A Vanadium

Columbium plus vanadium 0.005–0.05B 0.01–0.150.02–0.15C 5

Titanium Nitrogen Vanadium

0.006–0.040.003–0.0150.06max

Columbium shall be restricted to Grade 50[345]plate,bar,zee,and rolled tee thickness of 3⁄4in.[20mm]max,and to shapes with ﬂange or leg thickness to 11⁄2in.[40mm]inclusive unless killed steel is furnished.Killed steel shall be conﬁrmed by a statement of killed steel on the test report,or by a report of the presence of a sufficient quantity of a strong deoxidizing element,such as silicon at 0.10%or higher,or aluminum at 0.015%or higher.B

Product analysis limits =0.004to 0.06%.C

Product analysis limits =0.01to 0.16%.

TABLE 4Grade 50W [345W]Chemical Requirements (Heat

Analysis)

N OTE 1—Types A,B,and C are equivalent to Speciﬁcation A 588/A 588M Grades A,B,and C,respectively.

Element

Composition,%A Type A

Type B Type C Carbon B

0.19max 0.20max 0.15max Manganese B 0.80–1.250.75–1.350.80–1.35Phosphorus 0.04max 0.04max 0.04max Sulfur 0.05max 0.05max 0.05max Silicon 0.30–0.650.15–0.500.15–0.40Nickel 0.40max 0.50max 0.25–0.50Chromium 0.40–0.650.40–0.700.30–0.50Copper 0.25–0.400.20–0.400.20–0.50Vanadium

0.02–0.10

0.01–0.10

Weldability data for these types have been qualiﬁed by FHWA for use in bridge construction.B

For each reduction of 0.01percentage point below the speciﬁed maximum for carbon,an increase of 0.06percentage point above the speciﬁed maximum for manganese is permitted,up to a maximum of 1.50%.

TABLE 5Grades HPS 50W [HPS 345W]and HPS 70W

[HPS 485W],and HPS 100W [HPS 690W]Chemical Requirements

(Heat Analysis)

N OTE 1—Where “...”appears in this table,there is no requirement.

Element

Composition,%

Grades

HPS 50W [HPS 345W],

HPS 70W [HPS 485W]

Grade

HPS 100W [HPS 690W]

Carbon 0.11max 0.08max Manganese

2.5in.[65mm]and under 1.10–1.350.95–1.50

Over 2.5in.[65mm] 1.10–1.50A

Phosphorus 0.020max 0.015max Sulfur B 0.006max 0.006max Silicon 0.30–0.500.15–0.35Copper 0.25–0.400.90–1.20Nickel 0.25–0.400.65–0.90Chromium 0.45–0.700.40–0.65Molybdenum 0.02–0.080.40–0.65Vanadium

0.04–0.080.04–0.08Columbium (Niobium)...

0.01–0.03Aluminum 0.010–0.0400.020–0.050Nitrogen

0.015max

A Not applicable.

The steel shall be calcium treated for sulﬁde shape control.

4.1.1Type of component (tension or non-tension,fracture

critical or non-fracture critical)(see Section 10).4.2Impact testing temperature zone (see Table 7).5.General Requirements for Delivery

5.1Structural products furnished under this speciﬁcation shall conform to the requirements of the current edition of Speciﬁcation A 6/A 6M ,for the speciﬁc structural product ordered,unless a conﬂict exists in which case this speciﬁcation shall prevail.

5.2Coils are excluded from qualiﬁcation to this speciﬁca-tion until they are processed into a ﬁnished structural product.Structural products produced from coil means structural prod-ucts that have been cut to individual lengths from a coil.The processor directly controls,or is responsible for,the operations involved in the processing of a coil into a ﬁnished structural product.Such operations include decoiling,leveling or straightening,hot-forming or cold-forming (if applicable),cutting to length,testing,inspection,conditioning,heat treat-ment (if applicable),packaging,marking,loading for shipment,and certiﬁcation.

N OTE 1—For structural products produced from coil and furnished without heat treatment or with stress relieving only,two test results are to be reported for each qualifying coil.Additional requirements regarding structural products produced from coil are described in Speciﬁcation A 6/A 6M .

6.Materials and Manufacture

6.1For Grades 36[250]and 50[345],the steel shall be semi-killed or killed.

6.2For Grades 50W [345W],HPS 50W [HPS 345W],and HPS 70W [HPS 485W],the steel shall be made to ﬁne grain practice.

6.3For Grade 50S [345S],the steel shall be killed and such shall be affirmed in the test report by a statement of killed steel ,

a value of 0.10%or more for the silicon content,or a value of 0.015%or more for the total aluminum content.

6.4For Grade 50S [345S],the steelmaking practice used shall be one that produces steel having a nitrogen content not greater than 0.015%and includes the addition of one or more nitrogen-binding elements,or one that produces steel having a nitrogen content of not greater than 0.012%(with or without the addition of nitrogen-binding elements).The nitrogen con-tent need not be reported,regardless of which steelmaking practice was used.

6.5For Grades HPS 50W [HPS 345W],HPS 70W [HPS 485W],and HPS 100W [HPS 690W],the steel shall be made using a low-hydrogen practice,such as vacuum degassing during steel making;control

led soaking of the ingots,slabs;controlled slow cooling of the ingots,slabs,or plates,or a combination thereof.

6.6For Grade HPS 100W [HPS 690W],the requirements for ﬁne austenitic grain size in Speciﬁcation A 6/A 6M shall be met.二苯甲酰基甲烷

6.7Grades HPS 50W [HPS 345W]and HPS 70W [HPS 485W]shall be furnished in one of the following conditions:as-rolled,control-rolled,thermo-mechanical control processed (TMCP)with or without accelerated cooling,or quenched and tempered.

7.Heat Treatment

7.1For quenched and tempered Grades HPS 50W [HPS 345W]and HPS 70W [HPS 485W],the heat treatment shall be performed by the manufacturer and shall consist of heating the steel to not less than 1650°F [900°C],quenching it in water or oil,and tempering it at not less than 1100°F [590°C].The heat-treating temperatures shall be reported on the test certiﬁ-cates.

7.2For Grade HPS 100W [HPS 690W],the heat treatment shall be performed by the manufacturer and shall consist of heating the steel to a temperature in the range from 1600to 1700°F [870to 925°

C],quenching it in water,and tempering it at not less than 1050°F [565°C]for a time to be determined by the manufacturer.The heat-treating temperatures shall be reported on the test certiﬁcates.

8.Chemical Requirements

8.1The heat analysis shall conform to the requirements for the speciﬁed grade,as given in Tables 2-6.

8.2For Grade 50S [345S],in addition to the elements listed in Table 6,test reports shall include,for information,the chemical analysis for tin.Where the amount of tin is less than 0.02%,it shall be permissible for the analysis to be reported as <0.02%.

8.3For Grade 50S [345S],the maximum permissible car-bon equivalent value shall be 0.47%for structural shapes with ﬂange thickness over 2in.[50mm],and 0.45%for other structural shapes.The carbon equivalent shall be based on heat analysis.The required chemical analysis as well as the carbon equivalent shall be reported.The carbon equivalent shall be calculated using the following formula:

CE 5C 1Mn 61~Cr 1Mo 1V !51~Ni 1Cu !

(1)

TABLE 6Grade 50S [345S]Chemical Requirements

(Heat Analysis)

Element Composition,%Carbon,max 0.23

Manganese 0.50to 1.60A Silicon,max 0.40Vanadium,max 0.15B Columbium,max 0.05B Phosphorus,max 0.035Sulfur,max 0.045Copper,max 0.60Nickel,max 0.45Chromium,max 0.35Molybdenum,max

0.15

Provided that the ratio of manganese to sulfur is not less than 20to 1,the minimum limit for manganese for shapes with ﬂange or leg thickness not exceeding 1in.[25mm]shall be 0.30%.B

The sum of columbium and vanadium shall not exceed 0.15%.

TABLE 7Relationship Between Impact Testing Temperature

Zones and Minimum Service Temperature

Zone Minimum Service Temperature,°F [°C]10[−18]

2below 0to −30[−18to −34]3

below −30to −60[−34to −51]

9.Tensile Requirements

9.1The material as represented by test specimens,except as speciﬁed in 9.2,shall conform to the requirements for tensile properties given in Table 1.

9.2For Grade 36[250],shapes less than 1in.2[645mm 2]in cross section and bars,other than ﬂats,less than 1⁄2in.[12.5mm]in thickness or diameter need not be subjected to tension tests by the manufacturer.

10.Impact Testing Requirements

10.1Non-Fracture-Critical,T,Tension Components —Structural products ordered for use as tension components of non-fracture-critical members shall be impact tested in accor-dance with Speciﬁcation A 673/A 673M and as given in Table 8.The test results shall meet the requirements given in Table 8.10.2Fracture-Critical,F ,Tension Components —Structural products ordered for use as tension components of fracture-critical members shall be impact tested in accordance with Speciﬁcation A 673/A 673M and as given in Table 9.The test results shall meet the requirements given in Table 9.

10.3Steel grades ordered for use without suffix T or F as listed in 9.1and 9.2do not require impact testing and shall be used as non-tension components or secondary members only.11.Test Specimen

s and Number of Tension Tests

11.1For Grades 36[250],50[345],and 50W [345W],and non-quenched and tempered Grades HPS 50W [HPS 345W]and HPS 70W [HPS 485W],location and condition,number of tests,and preparation of test specimens shall meet the require-ments of Speciﬁcation A 6/A 6M .

11.2The following requirements,which are in addition to those of Speciﬁcation A 6/A 6M,shall apply only to Grade HPS 100W [HPS 690W]and quenched and tempered Grades HPS 50W [HPS 345W]and HPS 70W [HPS 485W].

11.2.1When possible,all test specimens shall be cut from the plate in its heat-treated condition.If it is necessary to prepare test specimens from separate pieces,all of these pieces

shall be full thickness,and shall be similarly and simulta-neously heat treated with the material.All such separate pieces shall be of such size that the prepared test specimens are free of any variation in properties due to edge effects.

11.2.2After ﬁnal heat treatment of the plates,one tension test specimen shall be taken from a corner of each plate as heat treated.

N OTE 2—The term “plate”identiﬁes the “plate as heat treated.”

12.Retests

12.1Grades 36[250],50[345],50S [345S],and 50W [345W],and non-quenched and tempered HPS 50W [HPS 345W]and HPS 70W [HPS 485W]shall be retested in accordance with Speciﬁcation A 6/A 6M.

12.2The manufacturer may reheat treat quenched and tempered plates that fail to meet the mechanical property requirements of this speciﬁcation.All mechanical property tests shall be repeated when the material is resubmitted for inspection.

13.Atmospheric Corrosion Resistance

13.1Steels meeting this speciﬁcation provide two levels of atmospheric corrosion resistance:

13.1.1Steel grades without suffix provide a level of atmo-spheric corrosion resistance typical of carbon or alloy steel without copper.

13.1.2The steel for Grades 50W [345W],HPS 50W [HPS 345W],and HPS 70W [HPS 485W]shall hav

e an atmospheric corrosion resistance index of 6.0or higher,calculated from the heat analysis in accordance with Guide G 101,Predictive Method Based on the Data of Larabee and Coburn (see Note 3).When properly exposed to the atmosphere,these steels can be used bare (unpainted)for many applications.The steel for Grade HPS 100W [HPS 690W]provides an improved level of atmospheric corrosion resistance over alloy steel without copper.

TABLE 8Non-Fracture Critical Tension Component Impact Test Requirements

Grade

Thickness,in.[mm]

Minimum Average Energy,ft·lbf [J]

Zone 1

Zone 2

Zone 3

36T [250T]A

to 4[100]incl

15[20]at 70°F [21°C]15[20]at 40°F [4°C]15[20]at 10°F [−12°C]50T [345T]A ,B ,

50ST [345ST]A ,B ,50WT [345WT]A ,B to 2[50]incl

over 2to 4[50to 100]incl

15[20]at 70°F [21°C]20[27]at 70°F [21°C]

15[20]at 40°F [4°C]20[27]at 40°F [4°C]

15[20]at 10°F [−12°C]20[27]at 10°F [−12°C]

HPS 50WT

[HPS 345WT]A ,B

to 4[100]incl 20[27]at 10°F [–12°C]20[27]at 10°F [–12°C]20[27]at 10°F [–12°C]

HPS 70WT

[HPS 485WT]C ,D to 4[100]incl 25[34]at –10°F [–23°C]25[34]at –10°F [–23°C]25[34]at –10°F [–23°C]

HPS 100WT

to 21⁄2[65]incl

25[34]at –30°F [−34°C]25[34]at –30°F [−34°C]25[34]at –30°F [−34°C][HPS 690WT]C

over 21⁄2to 4[65to 100]incl 35[48]at –30°F [–34°C]35[48]at –30°F [–34°C]35[48]at –30°F [–34°C]

A The CVN-impact testing shall be at “H”frequency in accordance with Speciﬁcation A 673/A 673M .

If the yield point of the structural product exceeds 65ksi [450MPa],the testing temperature for the minimum average energy required shall be reduced by 15°F [8°C]for each increment of 10ksi [70MPa]above 65ksi [450MPa].The yield point is the value given in the test report.C

The CVN-impact testing shall be at “P”frequency in accordance with Speciﬁcation A 673/A 673M .D

巨型火球坠落台湾连续爆燃If the yield strength of the structural product exceeds 85ksi [585MPa],the testing temperature for the minimum average energy required shall be reduced by 15°F [8°C]for each increment of 10ksi [70MPa]above

85ksi [585MPa].The yield strength is the value given in the test report.

N OTE 3—For methods of estimating the atmospheric corrosion resis-tance of low-alloy steels,see Guide G 101.The user is cautioned that the Guide G 101predictive equation (Predictive Method Based on the Data of Larabee and Coburn)for calculation of an atmospheric corrosion resis-tance index has only been veriﬁed for the composition limits stated in that guide.

14.Marking

14.1In addition to the marking requirements of Speciﬁca-tion A 6/A 6M ,the structural product shall be marked as follows:

14.1.1For Grade 50W [345W],the composition type shall be included.

14.1.2For structural products that conform to the require-ments of 10.1,the letter T and the applicable zone number (1,2,or 3)shall follow the grade designation.

14.1.3For structural products that conform to the require-ments of 10.2,the letter F and the applicable zone number (1,2,or 3)shall follow the grade designation.

15.Keywords

15.1alloy;atmospheric corrosion resistance;bars;bridges;carbon;fracture-critical;high-strength;low-alloy;non-fracture critical;plates;quenched;shapes;steel;structural steel;tempered

SUPPLEMENTARY REQUIREMENTS

Supplementary requirements shall not apply unless speciﬁed in the purchase order or contract.Standardized supplementary requirements for use at the option of the purchaser are listed in Speciﬁcation A 6/A 6M .Those that are considered suitable for use with this speciﬁcation are listed by title:

S8.Ultrasonic Examination

S5.1Refer to S8of Speciﬁcation A 6/A 6M .

S32.Single Heat Bundles

S32.1Bundles containing shapes or bars shall be from a single heat of steel.

S60.Frequency of Tension Tests线速度

S60.1Tension testing that is additional to the tension testing required by Speciﬁcation A 6/A 6M shall be made,as follows:S60.1.1Plate —One tension test shall be made using a test specimen taken from each as-rolled or as-heat treated plate.

S60.1.2Structural Shapes —One tension test shall be made using a test specimen taken from each 5tons [5Mg]of material produced on the same mill of the same nominal size,excluding length,from each heat of steel.For single pieces that weigh more than 5tons [5Mg]individually,each piece shall be tested.If shapes are heat treated,one test shall be made on specimens taken from each heat of the same nominal size,excluding length,in each furnace lot.

S60.1.3Bars —One tension test shall be made using a test specimen taken from each 5tons [5Mg]of the same heat and same diameter or thickness if the material is furnished as-rolled or is heat treated in a continuous-type furnace.For material heat treated in other than a continuous-type furnace,one test

TABLE 9Fracture Critical Tension Component Impact Test Requirements

Grade

Thickness,in.

[mm]

Minimum Test Value Energy,A ft-lbf [J]Minimum Average Energy A ,ft·lbf [J]

Zone 1

Zone 2

Zone 3

36F [250F]

to 4[100]incl 20[27]25[34]at 70°F [21°C]25[34]at 40°F [4°C]25[34]at 10°F [−12°C]50F [345F]B ,50SF [345SF]B ,50WF [345WF]B

to 2[50]incl over 2to 4[50to 100]incl 20[27]24[33]

25[34]at 70°F [21°C]30[41]at 70°F [21°C]

25[34]at 40°F [4°C]30[41]at 40°F [4°C]

25[34]at 10°F [−12°C]30[41]at 10°F [−12°C]

HPS 50WF [HPS 345WF]B to 4[100]incl 24[33]30[41]at 10°F [–12°C]30[41]at 10°F [–12°C]30[41]at 10°F [−12°C]HPS 70WF [HPS 485WF]C to 4[100]incl 28[38]35[48]at –10°F [–23°C]35[48]at –10°F [−23°C]35[48]at −10°F [−23°C]HPS 100WF [HPS 690WF]

to 21⁄2[65]incl

28[38]

35[48]at –30°F [−34°C]

35[48]at –30°F [–34°C]

The CVN-impact testing shall be at “P”frequency in accordance with Speciﬁcation A 673/A 673M exc

ept for plates of Grades 36F [250F],50F [345F],50WF [345WF],HPS 50WF [HPS 345WF],and HPS 70WF [HPS 485WF],for which the sampling shall be as follows:

(1)As-rolled (including control-rolled and TMCP)plates shall be sampled at each end of each plate-as-rolled.(2)Normalized plates shall be sampled at one end of each plate,as heat treated.

(3)Quenched and tempered plates shall be sampled at each end of each plate,as heat treated.B

If the yield point of the structural product exceeds 65ksi [450MPa],the testing temperature for the minimum average energy and minimum test value energy required shall be reduced by 15°F [8°C]for each increment of 10ksi [70MPa]above 65ksi [450MPa].The yield point is the value given in the test report.C

If the yield strength of the structural product exceeds 85ksi [585MPa],the testing temperature for the minimum average energy and minimum test value energy required shall be reduced by 15°F

[8°C]for each increment of 10ksi [70MPa]above 85ksi [585MPa].The yield strength is the value given in the test report.

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