ASTM B16-10

Designation:B16/B16M–10

StandardSpecificationfor

Free-CuttingBrassRod,BarandShapesforUseinScrew

Machines

1

ThisstandardisissuedunderthefixeddesignationB16/B16M;thenumberimmediatelyfollowingthedesignationindicatestheyearof

originaladoptionor,inthecaseofrevision,rinparenthesesindicatestheyearoflastreapproval.A

superscriptepsilon(´)indicatesaneditorialchangesincethelastrevisionorreapproval.

ThisstandardhasbeenapprovedforusebyagenciesoftheDepartmentofDefense.

*

1.1Thisspecificationestablishestherequirementsforfree-

cuttingbrassrod,bar,wire,andshapesofanyspecifiedcross

sectionproducedfromCopperAlloyUNSNos.C36000or

C36010suitableforhigh-speedscrewmachiningapplications

andmoderatethreadrolling.

1.2Units—ValuesstatedineitherSIunitsorinch-pound

ues

statedineachsystemmaynotbeexactequivalents;therefore,

-

ingvaluesfromthetwosystemsmayresultinnon-

conformancewiththestandard.

1.2.1Withinthetext,SIunitsareshowninbrackets.

1.3Thisstandarddoesnotpurporttoaddressallofthe

safetyconcerns,ifany,e

responsibilityoftheuserofthisstandardtoestablishappro-

priatesafetyandhealthpracticesanddeterminetheapplica-

bilityofregulatorylimitationspriortouse.

ncedDocuments

2.1ASTMStandards:

2

B249/B249MSpecificationforGeneralRequirementsfor

WroughtCopperandCopper-AlloyRod,Bar,Shapesand

Forgings

B250/B250MSpecificationforGeneralRequirementsfor

WroughtCopperAlloyWire

B601ClassificationforTemperDesignationsforCopper

andCopperAlloys—WroughtandCast

E8TestMethodsforTensionTestingofMetallicMaterials

E8MTestMethodsforTensionTestingofMetallicMateri-

als[Metric]

3

E18TestMethodsforRockwellHardnessofMetallicMa-

terials

E478TestMethodsforChemicalAnalysisofCopperAlloys

lRequirements

3.1ThefollowingsectionsofSpecificationsB249/B249M

(rod,bar,andshapes),andB250/B250M(wroughtcopperalloy

wire)constituteapartofthisspecification.

3.1.1Terminology,

3.1.2MaterialsandManufacture,

3.1.3Workmanship,Finish,andAppearance,

3.1.4Sampling,

3.1.5NumberofTestsandRetest,

3.1.6SpecimenPreparation,

3.1.7TestMethods,

3.1.8SignificanceofNumericalLimits,

3.1.9Inspection,

3.1.10RejectionandRehearing,

3.1.11Certification,

3.1.12MillTestReport,

3.1.13PackagingandPackageMarking,and

3.1.14SupplementaryRequirements.

3.2Inaddition,whenasectionwithatitleidenticaltothose

referencedin

3.1appearsinthisspecification,itcontains

additionalrequirementsthatsupplementthoseappearingin

SpecificationsB249/B249MandB250/B250M.

ngInformation

4.1Includethefollowinginformationwhenplacingorders

forproductunderthisspecification,asapplicable:

4.1.1ASTMspecificationdesignationandyearofissue

(B16/B16M–XX).

ations(C36000or

C36010,seeSection6andTable1).Unlessotherwisespeci-

fied,thealloysuppliedwillbeC36000.

4.1.3Temper(seeSection7andTables2-5).

tapprovedversionofthishistoricalstandardisreferenced

.

3

ThisspecificationisunderthejurisdictionofASTMCommitteeB05onCopper

andCopperAlloysandisthedirectresponsibilityofSubcommittee

B05.02onRod,

Bar,Wire,ShapesandForgings.

CurrenteditionapprovedOct.1,ally

eviouseditionapprovedin2005asB16/B16M–:

10.1520/B0016_B0016M-10.

2

ForreferencedASTMstandards,visittheASTMwebsite,,or

contactASTMCustomerServiceatservice@ualBookofASTM

Standardsvolumeinformation,refertothestandard’sDocumentSummarypageon

theASTMwebsite.

1

*ASummaryofChangessectionappearsattheendofthisstandard.

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B16/B16M–10

TABLE2TensileRequirements,inch-pound

N

OTE

—SeeTable3forSIvalues.

TemperDesignation

StandardName

DiameterorDistanceBetween

ParallelSurfaces,in.

TensileStrength,

min,ksi

YieldStrength

at0.5%

Extension

underLoad,

min,ksi

Elongation,

A

min,%

RodandWire

O60soft

anneal

1andunder

over1to2,incl.

over2

H02half-hard⁄andunder

over

1

⁄

2

to1,incl.

over1to2,incl.

over2to4,incl.,and

over4

1

2

48

44

40

57

55

C

50

45

40

80

70

65

Bar

20

18

15

25

25

20

15

15

45

35

30

15

20

25

7

B

10

15

20

20

H04hard

⁄to

3

⁄

16,

incl.

over

3

⁄

16

to

1

⁄

2,

incl.

over

1

⁄

2

to

3

⁄

4,

incl.

1

16

4

6

StandardName

O60softanneal

Thickness,in.

1andunder

over1

⁄andunder

⁄andunder

over

1

⁄

2

to2,incl.

over

1

⁄

2

to2,incl.

over2

1

2

1

2

Width,in.

6andunder

6andunder

1andunder

over1to6,incl.

2andunder

over2to6,incl.

over2to4,incl.

44

40

50

45

45

40

40

18

15

25

17

17

15

15

20

25

10

15

15

20

20

H02half-hard

A

B

Inanycase,eused.

Forproductfurnishedincoilstheelongationshallbe4%min.

C

Ifproductisspecifiedforthreadrollingapplications,theminimumtensilestrengthshallbe52ksi.

4.1.4Productcrosssectionform(forexample,round,hex-

agonal,square,etc.).

4.1.5Dimensions(seeSection9).

4.1.6Howfurnished:straightlengthsorcoils(see5.2).

4.1.7Edgecontours(seeSection9).

4.1.8Quantity;totalweight,footage,ornumberofpieces

foreachsize.

4.1.9Whenproductispurchasedforapplicationsrequiring

threadrolling(see1.1,Tables2-5).

4.1.10WhenproductispurchasedforagenciesoftheU.S.

Government(seeSection11).

4.2Thefollowingoptionsareavailableandshallbespeci-

fiedatthetimeofplacingtheorderwhenrequired:

4.2.1Tensiletestforproduct

1

⁄

2

in.[12mm]andover(see

8.2.1).

4.2.2Certification(refertoSpecificationsB249/B249Mor

B250/B250M).

4.2.3MillTestReport(refertoSpecificationsB249/B249M

orB250/B250M).

alsandManufacture

5.1Material—Thematerialofmanufactureshallbeacast

billetofCopperAlloyUNSNo.C36000orC36010andof

suchpurityandsoundnessastobesuitableforhotextrusion

intorod,bar,wire,andshapedproducts.

5.1.1Intheeventthatheatidentificationortraceabilityis

required,thepurchasershallspecifythedetailsdesired.

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TABLE1ChemicalRequirements

CopperAlloyUNSNo.C36000andC36010

ElementComposition,%

CopperAlloyUNSNo.

C36000

Copper

Lead

Iron,max

Zinc

60.0-63.0

2.5-3.0

0.35

Remainder

C36010

60.0–63.0

3.1–3.7

0.35

Remainder

N

OTE

1—Duetothediscontinuousnatureoftheprocessingofcastings

intowroughtproducts,itisnotalwayspracticaltoidentifyaspecific

castinganalysiswithaspecificquantityoffinishedmaterial.

5.2Manufacture—Productproducedunderthisspecifica-

tionshallbeinstraightlengths;however,itshallbefurnished

incoilswhensospecifiedinthecontractorpurchaseorder(see

4.1.6).

alComposition

6.1Theproductshallconformtothechemicalcomposi-

tionalrequirementsspecifiedinTable1forCopperAlloyUNS

No.C36000orC36010.

6.2TheUNSdesignatedcompositionlimitsdonotpreclude

thepossiblepresenceofotherunnamedelements;however,

analysisshallbemaderegularlyonlyfortheminorelements

listedinTable1,pluseithercopperorzinc,orplusallmajor

orelementthatisnotanalyzed

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B16/B16M–10

TABLE3TensileRequirements,SI

N

OTE

—SeeTable2forinch–poundvalues.

TemperDesignation

StandardName

DiameterorDistanceBetween

ParallelSurfaces,mm

TensileStrength,

min,MPa

YieldStrength

at0.5%

Extension

underLoad,

min,MPa

Elongation,

A

min,%

RodandWire

O60soft

anneal

25andunder

over25to50,incl.

over50

H02half-hard12andunder

over12to25,incl.

over25to50,incl.

over50to100,incl.,and

over100

1.6to4,incl.

over4to12,incl.

over12to18,incl.

Bar

StandardName

O60softanneal

Thickness,mm

25andunder

over25

12andunder

12andunder

over12to50,incl.

over12to50,incl.

over50

Width,mm

150andunder

150andunder

25andunder

over25to150,incl.

50andunder

over50to150,incl.

over50to100,incl.

305

275

345

310

310

275

275

125

105

170

115

115

105

105

20

25

10

15

15

20

20

330

305

275

395

380

C

345

310

275

550

480

450

140

125

105

170

170

140

105

105

310

240

205

15

20

25

7

B

10

15

20

20

H04hard

4

6

H02half-hard

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Inanycase,gationvaluesarebasedonagagelengthof5.65timesthesquarerootoftheareafordimensions

greaterthan2.5mm.

B

Forproductfurnishedincoilstheelongationshallbe4%min.

C

Ifproductisspecifiedforthreadrollingapplications,theminimumtensilestrengthshallbe350MPa.

A

TABLE4RockwellHardnessRequirements,inch-pound

N

OTE

1—SeeTable5forSIvalues.

N

OTE

2—Rockwellhardnessrequirementsarenotestablishedfordiameterslessthan

1

⁄

2

in.

TemperDesignation

DiameterofDistanceBetween

ParallelSurfaces,in.

RodandWire

StandardName

O60

H02

softanneal

half-hard

1

2

RockwellBHardnessDeterminedontheCrossSection

MidwayBetweenSurfaceandCenter

Round

⁄andover10-45

60-80

A

55-75

45-70

40-65

25min

Bar

Thickness,,in.

1

2

HexagonalandOctagonal

10-45

55-80

45-80

40-65

35-60

25min

⁄to1,incl.

over1to2,incl.

over2to3,incl.

over3to4,incl.

over4

1

2

O60

H02

softanneal

half-hard

1

2

⁄andover⁄andover10-35

45

35

40

35

35

-

-

-

-

-

85

70

80

70

70

⁄andunder

⁄andunder

over

1

⁄

2

to2,incl.

1

2

1

2

over2

A

1andunder

over1to6,incl.

2andunder

over2to6,incl.

over2to4,incl.

Ifproductisspecifiedforthreadrollingapplication,theRockwellBhardnessshallbe55–75.

shallbedeterminedbydifferencebetweenthesumofthose

elementsanalyzedand100%.Byagreementbetweenproducer

orsupplierandpurchaser,analysismayberequiredandlimits

tagecontentof

elementsshownas“remainder”(rem.)iscalculatedbydiffer-

ence.

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