Cusn4/Cusn5/Cusn6/Cusn8/Cusn10 Tin Bronze Copper Strip Qsn4-0.3

Alloy Brand

Chemical Composition (%)

GB

JIS

Cu

Fe

Pb

Sn

P

Al

Zn

Impurities

QSn6.5-0.1

C5191

Bal

0.05

0.02

6.0-7.0

0.1-0.25

0.002

0.3

0.4

QSn8.0-0.3

C5210

Bal

0.1

0.05

7.0-9.0

0.03-0.35

-

0.2

0.85

Brand

Temper

Elongation Test

Hardness (HV)

Tensile Strength (N/mm2)

Elongation (%)

QSn6.5-0.1

M

≥315

≥40

≤120

Y4

390-510

≥35

110-155

Y2

490-610

≥10

150-190

Y

590-690

≥8

180-230

T

635-720

≥5

200-240

TY

≥690

-

≥210

QSn8.0-0.3

M

≥345

≥45

≤120

Y4

390-510

≥40

100-160

Y2

490-610

≥30

150-205

Y

590-705

≥12

180-235

T

≥685

≥5

≥210

Wrought Copper-zinc and Copper-tin Binary Alloys - Compositions, Uses and Typical Properties

Material Designation

Composition, %, Range or Max

Nearest

Old BS

Equivalent

Characteristics 0.2% and Uses

Typical Mechanical Properties

Symbol

Number

Cu

P

Pb

Sn

Zn

Others

0.2% Proof Strength (N/mm2)

Tensile Strength (N/mm2)

Elongation (%)

Hardness (HV)

CuSn4

CW450K

Rem.

0.01-0.4

3.5-4.5

0.2

PB101

Strength increases as tin content

increases. Good corrosion and

corrosion fatigue properties lead

to uses such as springs,

instrument components, wire cloth,

condenser tube-plates and vessels,

and electronic components.

Controlled resistivity wire for

power applications.

140-850

320-950

60-1

75-230

CuSn5

CW451K

Rem.

0.01-0.4

4.5-5.5

0.2

PB102

140-850

320-950

60-1

75-230

CuSn6

CW452K

Rem.

0.01-0.4

5.5-7.0

0.2

PB103

140-950

340-1000

60-1

80-250

CuSn8

CW453K

Rem.

0.01-0.4

7.5-8.5

0.2

PB104

170-1000

390-1100

60-1

85-270