High-Leaded Tin Bronze UNS C93400

Topics Covered

Introduction
Chemical Composition
Physical Properties
Mechanical Properties
Other Designations
Fabrication and Heat Treatment
     Machinability
     Welding
     Heat Treatment

Introduction

Leaded nickel-tin bronze UNS C93400 is a cast alloy of copper-tin-lead. The addition of nickel in the alloy enhances the strength and ductility. UNS C93400 copper alloy is resistant to biofouling and corrosion.

The following datasheet provides the chemical composition and properties of UNS C93400.

Chemical Composition

The chemical composition of UNS C93400 copper alloy is given in the following table.

Element Content (%)
Cu 84
Pb 8
Sn 8

Physical Properties

The following table details the physical properties of UNS C93400 alloy.

Properties Metric Imperial
Density 8.87 g/cm3 0.320 lb/in³

Mechanical Properties

The mechanical properties of UNS C93400 copper alloy are shown in the following table.

Properties Metric Imperial
Elastic modulus 117 GPa 16969 ksi
Poisson's ratio 0.34 0.34
Hardness, Brinell 60 60
Tensile strength 220 MPa 31900 psi
Yield strength 110 MPa 16000 psi
Elongation at break 20.0% 20.0%
Izod impact 6.80 J 5.02 ft.lb
Compressive strength 330 MPa 47900 psi
Fatigue strength 100 MPa 14500 psi

Other Designations

Equivalent designations to UNS C93400 include:

  • ASTM B30
  • ASTM B505
  • QQ C390

Fabrication and Heat Treatment

Machinability

UNS C93400 copper alloy has a machinability rating of 70.

Welding

The preferred welding techniques for UNS C93400 are soldering and brazing. Carbon arc welding, oxyacetylene welding, gas shielded arc welding and coated metal arc welding are not recommended for this alloy.

Heat Treatment

The stress relieving temperature of UNS C93400 copper alloy is 260°C (500°F). It does not respond to heat treatment.


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