Phosphor Bronze Strip

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Has especially an wide industrial use as electric contact for the automotive, white goods and brown goods industries. Phosphor Bronze has also a special area of use such as connector contacts, pump components, welding wires and electrotes.

Physical Properties

Alloy

Density
(gr/cm³)

Thermal Elongation Factor 
(10-6 K-1)

Electric Cond. (MS/
m?mm²)

Electric Cond.      (% IACS)

Heat Cond. (W/mK)

Flexibility (kN/mm²)

Welding Prop.

Solderin Prop.

Cracking

CuSn6

8.90

18.5

9

15

75

115

Good

Very Good

No

CuSn8

8.90

18.5

7.5

13

62

115

Good

Very Good

No

 

Mechanical Properties

Alloy

Temper

T/S RM
(N/mm²)

Bending Hardness
Rp 0.2 (N/mm²)

Elongation
A50 mm
(%50 min)

Vickers Hardness

CuSn6

R350/H80

350-420

≥300

≥45

80-110

R420/H125

420-520

≥260

≥17

125-165

R500/H160

500-590

≥450

≥8

160-190

R560/H180

560-650

≥500

≥5

180-210

R640/H200

640-730

≥600

≥3

200-230

R720/H220

≥720

≥690

≥220

CuSn8

R370/H90

370-450

≥300

≥50

90-120

R450/H135

450-550

≥280

≥20

135-175

R540/H170

540-630

≥460

≥13

170-200

R600/H190

600-690

≥530

≥5

190-220

R660/H210

660-750

≥620

≥3

210-240

R740/H230

≥740

≥700

≥2

≥230

 

Chemical Composition

Alloy

Chemical Composition (%)

EN

USA

Standards

CuSn6

Sn 5.5-7.0
P max. 0.35
Cu Rest

CW452K

C51900

DIN 17670-1
BS Alloy Pb 103

CuSn8

Sn 7.5-8.5
P max. 0.35
Cu Rest

CW453K

C52100

DIN17670-1
BS Alloy Pb 104

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