CW 451K Phosphorus Bronze

Chemical Composition (%)

Cu

Sn

P

Fe

Pb

Zn

Remainder

3.5 4.5

0.01 0.50

0.10 max.

3.0 - 4.0

1.5 4.5

Sum of all named elements = 99.5%

Mechanical Properties
Minimum Tensile Properties, English/Metric

Temper HO4 hard

Nominal Diameter

Tensile Strength

Elongation**

Inches/mm

ksi

MPa

%

" " incl./6 - 12 mm. incl.

60

415

10

Over " to 1" incl./12-25 mm incl.

55

380

12

Over 1.00"/25 mm

50

345

15

Physical Properties

English

Metric

Melting Point Liquidus

1830 F

999 C

Melting Point Solidus

1700 F

927 C

Density

0.320 lb/in³ at 68 F

8.89 gm/cm³ @ 20 C

Specific Gravity

8.890

8.89

Electrical Resistivity (Annealed)

54.60 ohms-cmil/ft @ 68 F

9.08 microhm-cm @ 20 C

Electrical Conductivity (Annealed)

19%IACS @ 68 F

0.111 MegaSiemens/cm @ 20 C

Thermal Conductivity

50 Btu ft/(hr ft²F) @ 68 F

86.5 W/mK @20 C

Coefficient of Thermal Expansion

9.60 10^-6 per F (68-572 F)

17.3 10^-6 per C (20-300 C)

Specific Heat Capacity

0.090 Btu/lb/F @ 68 F

377.1 J/kg K @293 K

Modulus of Elasticity in Tension

15,000 ksi

103,400 MPa

Fabrication Practices

Soldering

Excellent

Capacity for Being Cold Worked

Good

Brazing

Good

Oxyacetylene Welding

Not Recommended

Annealing Temperature Minimum

900 F or 483 C

Gas Shielded Arc Welding

Not Recommended

Annealing Temperature Maximum

1250 F or 677 C

Coated Metal Arc Welding

Not Recommended

Resistance Welding Spot

Not Recommended

Resistance Welding Seam

Not Recommended

Resistance Welding Butt

Fair