ASTM B 140 C31400 Leaded Commercial Bronze

Chemical Composition (%)

Cu

Pb

Fe

Ni

Zn

87.5 90.5

1.3 2.5

0.10 max.

0.7 max.

Remainder

Sum of all named elements = 99.6%

Mechanical Properties
Minimum Tensile Properties, English/Metric

Temper HO2 half hard

Nominal Diameter

Tensile Strength

Yield Strength*

Elongation**

Inches/mm

ksi

MPa

ksi

MPa

%

" and under/ 12 mm

50

345

30

205

7

Over to 1"/12-25 mm incl

45

310

27

185

10

Over 1.00"/25 mm

40

275

25

170

12

Temper HO4 hard

Nominal Diameter

Tensile Strength

Yield Strength*

Elongation**

Inches/mm

ksi

MPa

ksi

MPa

%

2" and under/50 mm

53

365

40

275

6

Physical Properties

English

Metric

Melting Point Liquidus

1900 F

1038 C

Melting Point Solidus

1850 F

1010 C

Density

0.319 lb/in³ at 68 F

8.83 gm/cm³ @ 20 C

Specific Gravity

8.830

8.83

Electrical Resistivity (Annealed)

24.70 ohms-cmil/ft @ 68 F

4.11 microhm-cm @ 20 C

Electrical Conductivity (Annealed)

42%IACS @ 68 F

0.246 MegaSiemens/cm @ 20 C

Thermal Conductivity

104 Btu ft/(hr ft²F) @ 68 F

180.0 W/mK @20 C

Coefficient of Thermal Expansion

10.2 10-6 per F (68-572 F)

18.4 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

17,000 ksi

117,000 MPa

Fabrication Practices

Soldering

Excellent

Capacity for Being Cold Worked

Good

Brazing

Good

Capacity for Being Hot Formed

Poor

Oxyacetylene Welding

Not Recommended

Gas Shielded Arc Welding

Not Recommended

Annealing Temperature Minimum

800 F or 427 C

Coated Metal Arc Welding

Not Recommended

Annealing Temperature Maximum

1200 F or 649 C

Resistance Welding Spot

Not Recommended

Resistance Welding Seam

Not Recommended

Resistance Welding Butt

Fair