ASTM B139 Specification

Scope

This specification establishes the requirements for phosphor bronze rod, bar, and shapes. Units—The values stated in inch-pound units or SI units are to be regarded separately in the standard. Within the text, the SI values are given in brackets. The values stated in each system are not exact equivalents; each system of units is independent of the other. Combining values from the two systems may result in nonconformance with the specification.

Chemical Composition

Element, %Copper Alloy UNS No.
C51000C52100C52400C53400C54400
Tin4.2-5.87.0-9.09.0-11.03.5-5.83.5-4.5
Phosphorus0.03-0.350.03-0.350.03-0.350.03-0.350.01-0.50
Iron,max0.100.100.100.100.10
Lead0.05 max0.05 max0.05 max0.8-1.23.5-4.5
Zinc0.30 max0.20 max0.20 max0.30 max1.5-4.5
Copperremainderremainderremainderremainderremainder

Mechanical Properties of Rod and Bar

Temper DesignationDiameter or Distance Between Parallel Surfaces,A in.Tensile Strength, ksiElongation in 43 Diameter or Thickness of Specimen, min, %B
CodeNameminmax
Copper Alloy UNS No. C51000
060soft annealrod: round under 1⁄44058
H04hardrod: round under 1⁄480128
  round and hexagonal:   
  1/4 to1⁄2 , incl7013
  over 1⁄2 to 1, incl6015
  over 15518
  bar: square and rectangular:   
  1⁄4 to 3⁄8 ,incl6010
  over 3⁄85515
H08springrod: round:   
  0.026 to1⁄16 ,incl115
  over 1⁄16 to 1⁄8 , incl110
  over 1⁄8 to 1/4 , incl1053.5
  over 1/4 to 3/8 ,incl1005.0
  over 3/8 to1/2 ,incl909.0
Copper Alloy UNS No. C52100
060soft annealrod: round under 1⁄45368
H04hardrod: round under 1⁄4105150
  round and hexagonal:   
  1⁄4 to 1⁄2, incl8512
  over 1⁄2 to 1, incl7515
  over 16020
  bar: square and rectangular:   
  1⁄4 to 3⁄8 , incl6810
  over 3⁄86015
Copper Alloy UNS No. C52400
060soft annealrod: round under 1⁄46075
H04hardrod: round under 1⁄4105160
  round and hexagonal:   
  1⁄4 to 1⁄2 , incl9510
  over 1⁄2 to 1,incl8512
  over 17015
  bar: square and rectangular:   
  1⁄4 to 3⁄8 , incl7610
  over 3⁄87015
Copper Alloy UNS Nos. C53400 and C54400
H04hard    rod: round and hexagonal:   
  1⁄16 to1⁄4 ,incl658
  over 1/4 to1⁄2 incl6010
  over 1⁄2 to 1, incl5512
  over 150 15
  bar:square and rectangular:   
  1/4 to 3⁄8 ,incl5510
  over 3⁄85015

Note:

A. For rectangular bar, the Distance Between Parallel Surfaces refers to thickness.
B. In any case, a minimum gage length of 1 in. shall be used.

Mechanical Properties for Rod and Bar, SI

Temper DesignationDiameter or Distance Between Parallel Surfaces,A in.Tensile Strength, MPaElongation in 43 Diameter or Thickness of Specimen, min, %B
CodeNameminmax
Copper Alloy UNS No. C51000
060soft annealrod: round under 6275400
H04hardrod: round under 6550880
  round and hexagonal:   
  6 to 12incl48513
  12 to 25 incl41515
  over 2538018
  bar: cquaro and roctangular:   
  6 to 9 incl41510
  over 938015
HOBspringrod:round:   
  0.065 to 1.6 incl790
  over 1.6 to 3incl760
  over 3 to 6incl7253.5
  over 6 to 9incl6905.0
  over 9 to 12 incl6209.0
Copper Alloy UNS No. C52100
060soft annealrod: round under 6365470
H04hardrod: round under 6 round and hexagonal:7201030
  6 to 12 incl58512
  over 12 to 25 incl51515
  over 2541520
  bar: square and rectangular:   
  6 to 9 incl47010
  over 941515
Copper Alloy UNS No. C52400
060soft annealrod: round under 6415515
H04hardrod: round under 67251100
  round and hexagonal:  10
  6 to 12incl65512
  over 12 to 25incl58515
  over 25480
  bar: square and rectangular:   
  6 to 9 incl52510
  over 948015
Copper Alloy UNS Nos. C53400 and C54400
H04hard    rod: round and hexagonal:   
  1.6 to 6 incl4508
  over 6 to 12 incl41510
  over 12 to 25 incl38012
  over 2534515
  bar: square and rectangular:   
  6 to 9 incl38010
  over 934515

Note:

A. For rectangular bar, the Distance Between Parallel Surfaces refers to thickness.
B. In any case, a minimum gage length of 25mm shall be used.