Bsi bs 3b 31 2009

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© BSI 2 0

ISBN 9 8 0 5 0 6 8 6 7

ICS4 0 5.15

Th folowin BSI refere ces relate to th work on this s a d rd:

C mmit e refere ce ACE/61

Draf for comme t 0 /3 1812 7 DC

P blcation his ory

Fir t publsh dJu e 19 1

Secon e ition December 2 01

Third (prese t) e ition, Nov mber 2 0

Ame dme t is u d since publ cation

Foreword i

2 Normativ references 1

3 Tech ical req irement 1

Bibl o rap y 4

L is of tables

Table 1 – Tech ical req irement for Cu-Be aloy s rip an foi ( olutio

t e ted, coldrol ed: fuly hard an precipitation t e ted) 2

Summary of pag s

T is d cument comprises a fro t cov r, an inside fro t cov r,

pages i to i pages 1 to 4, an inside back cov r an a back cov r

P bl shing information

T is British Standard is p blshed by BSI an came intoeffect

o 30 Nov mber 20 9 It was prepared by Panel ACE/61/ 16,

Co p r and mis celane us alo s, u der the auth rity of Tech ical

Commit e ACE/61, M etal c materials for aeros pace purp s es.A ls

of organiz tio s representedon this commit e can be o tained o

req es to it secretary

Superses ion

T is British Standard su er edes BS 2B 31:20 1, which is withdrawn

Information about this document

T is is a ful re isio of BS 2B 31 an int o uces the folowin principal

chan es:

a) req irement ares ated in tab lar format in ac ordance with

EN450 -1;

b) references to par s ha e be n deleted

Ha ard warnings

WARNING T is British Stan ard cal s for the use of su s ances

an /or proced res that can be injurio s to he lth if adeq ate

precautio s are n t taken It refer only to tech ical suitabi ty an

d es n t absolv the user from legal o lgatio s relatin to he lth

an safety at any s age

Use of this document

It has be n as umed in the preparatio of this British Stan ard that the

e ecutio of it provisio s wi be ent us ed to ap ro riately q al fed

an e perienced peo le,f or wh se use it has be n pro uced

Presentational conventions

T eprovisio s of this s andard are presented in roman (ie u rig t)

type It req irement are e pres ed either as a set of ins ructions or in

sentences in which theprincipal auxi ary v rb is “shal ”

Comme tary, e planatio and ge eral informativ material is prese ted

in smaler italc ty e, and do s n t co situte a n rmativ eleme t

Cont actual and legal considerations

T is p blcatio d es n t p rp r to inclu e al theneces ary provisio s

of aco t act User areresp nsible f or it cor ect ap lcatio

Compl ance with a British Standard cann t co f er immu ity from

le al o lgatio s

1 Scope

T is British Stan ard specifes req irement for co per -beryl um aloy

su pl ed in the form of s rip an foi

T e folowin referenced d cument are in ispensable for the

applcatio of this document For dated references, o ly the editio

cited ap les For u dated references, the lates editio of the

referenced document (inclu in any amen ment ) ap les

BS B 10 , Proced re for ins pection, tes ting and a ce tance of wrou ht

co p r alo s

BS EN 16 4, Co p r and co p r alo s – Strip for springs and co n ctor

3.1 Material to this s an ard shal co form to Table 1

NOTE The format and s ymb ls us ed in Table 1are derived from

EN 4 0 0 -1

3.2 For the p rp ses of this s an ard, a batch shal bematerial of

the same n minal cros -sectio al dimensio s, from the same cas ,

man factured by the same ro te an he t t e ted to ether

Table 1 T chnical r eq ireme t f or Cu‑B al o s rip an f oi ( solutio treate , cold rol e : fuly har d an

precipitatio tr eate )

2 C emical

comp sitio

%

—-Base

4.3 Limit dimensio ( s) mm 0.10 G a G 3.0

5 Tech ical specifcatio S ctio s 1an 6 of BS B 10

6.1 Delvery co ditio Solutio tre ted + cold roled (H)

He t treatment

7 0 °C G h G 8 5 °C / Quench

1

7 Use co ditio Solutio tre ted + cold roled (H) + precipitatio tre ted

He t treatment

Delv ry co ditio + 315 °C G h G 3 0 °C / t = 2 h / AC

C arac eris ic

8.1 Tes sample( s) S e S ctio 6 of BS B 10

10 T hick nes of clad in o

e ch face

12

T

Temperature

h

p 2

m MPa 6 0 G R

m

m

G 15 0

16 Red c io of

area

17 Hardnes

18 She r s ren th R

c

19 Ben in

j

— 1.0 (α = 9 °) 3.0 (α = 9 °) —

21

C

Temperature

h

r

a

r

R

ru ture

2 Notes (e lne 9 )

1

Table 1 T ch ical req ir eme t for Cu‑B alo s rip an f oi ( solutio tr eate , cold r ole :f ul y hard an

pr ecipitatio treate ) (co tinued)

4 External defec s — S e S ctio 6 of BS B 10

9 Dimensio al inspec io — BS EN 16 4 clas A

98 Notes

1

Quenchin shal be effected by for ed air,spra ed water or immersio in oi

or water

Bibl ography

Standards publ cations

For dated references, o ly the editio cited apples For u dated

references, the lates editio of the referenced d cument (inclu in

any amen ment ) ap l es

EN 450 -1, M etal c materials – R les for th dra ting and pres entatio

of material s tandards – Par 1: Ge eral rules

1)

1)

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