ASTM B103 Specification

Scope

This specification establishes the requirements for copper-tin alloy (phosphor bronze), copper-tin-lead alloy (leaded phosphor bronze), and copper-tin-lead-zinc alloy (bearing bronze), plate, sheet, strip, and rolled bar. The phosphor bronzes commonly are used for deep drawing into bellows and stamping and forming into spring devices and into terminals and connectors for electrical apparatus because they combine high strength with high elongation. The leaded phosphor bronzes are used where strength, corrosion resistance, and machinability are required. The bearing bronze is used in bushings, bearings, and load-bearing thrust washers.

Chemical Composition

ElementComposition, %
Copper Alloy UNS No.
C51000C51100C51180C51900C52100C52180C52400C53400 AC54400 A
Tin4.2-5.83.5-4.93.5-4.95.0-7.07.0-9.07.0-9.09.0-11.03.5-5.83.5-4.5
Phosphorus0.03-0.350.03-0.350.01-0.350.03-0.350.03-0.350.01-0.350.03-0.350.03-0.350.01-0.50
Iron, max0.100.100.05-0.200.100.100.05-0.200.100.100.10
Lead0.05 max0.05 max0.05 max0.05 max0.05 max0.05 max0.05 max0.8-1.23.0-4.0
Zinc0.30 max0.30 max0.30 max0.30 max0.20 max0.30 max0.20 max0.30 max1.5-4.5
Nickel––0.05-0.20––0.05-0.20–––
Copperremainderremainderremainderremainderremainderremainderremainderremainderremainder

Note :

A. When specified for bearings, the phosphorus content shall be maintained from 0.01 to 0.15 %.

Mechanical Properties of Rod and Bar

Temper DesignationAThickness, in. [mm]Tensile Strength, ksiB  [MPa]Approximate Rockwell Hardness
CodeNameMinMaxB ScaleSuperficial 30–T
Copper Alloy UNS No. C51000
M20as hot-rolledOver 0.188 [4.775]40 [275]60 [415]. . .. . .
O60softOver 0.039 [0.991]43 [295]58 [400]16-64. . .
  Over 0.029 [0.737]  . . .32-59
  Over 0.020 [0.508] to 0.039 [0.991] incl  12-60. . .
  Over 0.010 [0.254] to 0.029 [0.737] incl  . . .24-53
  0.003 [0.076] to 0.010 [0.254] incl    
H02half-hardOver 0.039 [0.991]58 [400]73 [505]64-85. . .
  Over 0.029 [0.737]  . . .59-73
  Over 0.02 [0.508] to 0.039 [0.991] incl  60-82. . .
  Over 0.010 [0.254] to 0.029 [0.737] incl  . . .53-69
  0.003 [0.076] to 0.010 [0.254] incl    
H04hardOver 0.039 [0.991]76 [525]91 [625]86-93. . .
  Over 0.029 [0.737]  . . .73-78
  Over 0.020 [0.508] to 0.039 [0.991] incl  84-91. . .
  Over 0.010 [0.254] to 0.029 [0.737] incl  . . .71-75
  0.003 [0.076] to 0.010 [0.254] incl    
H06extra-hardOver 0.039 [0.991]88 [605]103 [710]92-96. . .
  Over 0.029 [0.737]  . . .77-81
  Over 0.020 [0.508] to 0.039 [0.991] incl  89-95. . .
  Over 0.010 [0.254] to 0.029 [0.737] incl  . . .74-78
  0.003 [0.076] to 0.010 [0.254] incl    
H08springOver 0.039 [0.991]95 [655]110 [760]94-98. . .
  Over 0.029 [0.737]  . . .79-82
  Over 0.020 [0.508] to 0.039 [0.991] incl  92-97. . .
  Over 0.010 [0.254] to 0.029 [0.737] incl  . . .76-80
  0.003 [0.076] to 0.010 [0.254] incl    
H10extra-springOver 0.039 [0.991]100 [690]114 [785]96-99. . .
  Over 0.029 [0.737]  . . .80-83
  Over 0.020 [0.508] to 0.039 [0.991] incl  94-98. . .
  Over 0.010 [0.254] to 0.029 [0.737] incl  . . .77-81
  0.003 [0.076] to 0.010 [0.254] incl    
Copper Alloy UNS Nos. C51100, C53400, and C54400
M20as hot-rolledOver 0.188 [4.775]40 [275]58 [400]. . .. . .
060softOver 0.039 [0.991]40 [275]55 [380]7-50. . .
  Over 0.029 [0.737]  . . .24-50
  Over 0.020 [0.508] to 0.039 [0.991] incl  0-45. . .
  Over 0.010 [0.254] to 0.029 [0.737] incl  . . .16-46
H02half-hardOver 0.039 [0.991]55 [380]70 [485]60-81. . .
  Over 0.029 [0.737]  . . .57-73
  Over 0.020 [0.508] to 0.039 [0.991] incl  53-78. . .
  Over 0.010 [0.254] to 0.029 [0.737] incl  . . .52-71
H04hardOver 0.039 [0.991]72 [495]87 [600]82-90. . .
  Over 0.029 [0.737]  . . .71-77
  Over 0.020 [0.506] to 0.039 [0.991] incl  80-86. . .
  Over 0.010 [0.254] to 0.029 [0.737] incl  . . .69-75
H06extra-hardOver 0.039 [0.991]84 [580]99 [685]88-94. . .
  Over 0.029 [0.737]  . . .75-80
  Over 0.020 [0.506] to 0.039 [0.991] incl  86-92 
  Over 0.010 [0.254] to 0.029 [0.737] incl  . . .73-78
H08springOver 0.039 [0.991]91 [625]106 [730]90-98. . .
  Over 0.029 [0.737]  . . .77-81
  Over 0.020 [0.508] to 0.039 [0.991] incl  86-94. . .
  Over 0.010 [0.254] to 0.029 [0.737] incl  . . .75-79
H10extra-springOver 0.039 [0.991]96 [660]108 [745]92-97. . .
  Over 0.029 [0.737]   . . .78-82
  Over 0.020 [0.508] to 0.039 [0.991]incl  89-94. . .
  Over 0.010 [0.254] to 0.029 [0.737] incl  . . .76-80
Copper Alloy UNS No. C51180
H02half-hardOver 0.039 [0.991]69 [475]84 [580]80-90. . .
  Over 0.029 [0.737]  . . .69-75
  Over 0.020 [0.508] to 0.039 [0.991] incl  78-88. . .
  Over 0.010 [0.254] to 0.029 [0.737] incl  . . .67-73
H033/4-hardOver 0.039 [0.991]80 [550]92 [635]84-92. . .
  Over 0.029 [0.737]  . . .71-77
  Over 0.020 [0.508] to 0.039 [0.991] incl  80-88. . .
  Over 0.010 [0.254] to 0.029 [0.737] incl    
H04hardOver 0.039 [0.991]85 [585]100 [690]88-9569-75
  Over 0.029 [0.737]  . . .74-80
  Over 0.020 [0.508] to 0.039 [0.991] incl  85-93. . .
  Over 0.010 [0.254] to 0.029 [0.737] incl  . . .71-78
H06extra-hardOver 0.039 [0.991]97 [670]112 [770]89-97. . .
  Over 0.029 [0.737]  . . .76-81
  Over 0.020 [0.508] to 0.039 [0.991] incl  87-95. . .
  Over 0.010 [0.254] to 0.029 [0.737] incl  . . .74-79
H08springOver 0.039 [0.991]105 [725]119 [820]94-100. . .
  Over 0.029 [0.737]  . . .77-82
  Over 0.020 [0.508] to 0.039 [0.991] incl  92-98. . .
  Over 0.010 [0.254] to 0.029 [0.737] incl  . . .74-80
H10extra-springOver 0.039 [0.991]110 [760]122 [840]96-104. . .
  Over 0.029 [0.737]  . . .78-82
  Over 0.020 [0.508] to 0.039 [0.991] incl  94-102. . .
  Over 0.010 [0.254] to 0.029 [0.737] incl  . . .76-80
Copper Alloy UNS No. C51900
060softOver 0.039 [0.991]48 [330]63 [435]22-66. . .
  Over 0.029 [0.737]  . . .35-64
  Over 0.020 [0.508] to 0.039 [0.991] incl  18-63. . .
  Over 0.010 [0.254] to 0.029 [0.737] incl  . . .25-57
H02half-hardOver 0.039 [0.991]64 [440]79 [545]70-88. . .
  Over 0.029 [0.737]  . . .63-76
  Over 0.020 [0.508] to 0.039 [0.991] incl  65-85. . .
  Over 0.010 [0.254] to 0.029 [0.737] incl  . . .58-72
H04hardOver 0.039 [0.991]80 [550]96 [660]89-95. . .
  Over 0.029 [0.737]  . . .74-80
  Over 0.020 [0.508] to 0.039 [0.991] incl  86-93. . .
  Over 0.010 [0.254] to 0.029 [0.737] incl  . . .72-78
Copper Alloy UNS No. C52100
M20as hot-rolledOver 0.188 [4.775]50 [345]78 [540]. . .. . .
060softOver 0.039 [0.991]53 [365]67 [460]29-70. . .
  Over 0.029 [0.737]  . . .38-68
  Over 0.020 [0.508] to 0.039 [0.991] incl  20-66. . .
  Over 0.010 [0.254] to 0.029 [0.737] incl  . . .27-62
H02half-hardOver 0.039 [0.991]69 [475]84 [580]76-91. . .
  Over 0.029 [0.737]  . . .67-78
  Over 0.020 [0.508] to 0.039 [0.991] incl  69-88. . .
  Over 0.010 [0.254] to 0.029 [0.737] incl  . . .63-75
H04hardOver 0.039 [0.991]85 [585]100 [690]91-97. . .
  Over 0.029 [0.737]  . . .76-81
  Over 0.020 [0.508] to 0.039 [0.991] incl  89-95. . .
  Over 0.010 [0.254] to 0.029 [0.737] incl  . . .73-80
H06extra-hardOver 0.039 [0.991]97 [670]112 [770]95-100. . .
  Over 0.029 [0.737]  . . .78-83
  Over 0.020 [0.508] to 0.039 [0.991] incl  93-98. . .
  Over 0.010 [0.254] to 0.029 [0.737] incl  . . .77-82
H08springOver 0.039 [0.991]105 [725]119 [820]97-102. . .
  Over 0.029 [0.737]  . . .79-84
  Over 0.020 [0.508] to 0.039 [0.991] incl  95-100. . .
  Over 0.010 [0.254] to 0.029 [0.737] incl  . . .78-83
H10extra-springOver 0.039 [0.991]110 [760]122 [840]98-103. . .
  Over 0.029 [0.737]  . . .80-84
  Over 0.020 [0.508] to 0.039 [0.991] incl  96-101. . .
  Over 0.010 [0.254] to 0.029 [0737] incl  . . .79-83
Copper Alloy UNS No. C52180
H02half-hardOver 0.039 [0.991]90 [620]105 [725]90-100…
  Over 0.029 [0.737]  …77-83
  Over 0.020 [0.508] to 0.039 [0.991] incl  93-99…
  Over 0.010 [0.254] to 0.029 [0.737] incl  …72-81
H033/4 hardOver 0.039 [0.991]97 [670]112 [770]……
  Over 0.029 [0.737]  ……
  Over 0.020 [0.508] to 0.039 [0.991] incl  ……
  Over 0.010 [0.254] to 0.029 [0.737] incl  ……
H04hardOver 0.039 [0.991]105 [725]120 [825]94-102…
  Over 0.029 [0.737]  …78-84
  Over 0.020 [0.508] to 0.039 [0.991] incl  92-98…
  Over 0.010 [0.254] to 0.029 [0.737] incl  …77-82
H06extra-hardOver 0.039 [0.991]108 [745]125 [860]97-103…
  Over 0.029 [0.737]  …79-85
  Over 0.020 [0.508] to 0.039 [0.991] incl  96-103…
  Over 0.010 [0.254] 0.029 [0.737] incl  …78-84
H08springOver 0.039 [0.991]115 [795]132 [910]98-105…
  Over 0.029 [0.737]  …80-86
H10extra-springOver 0.020 [0.508] to 0.039 [0.991] incl  98-104…
  Over 0.010 [0.254] to 0.029 [0.737] incl  …79-84
  Over 0.039 [0.991]120 [825]140 [965]100 min…
  Over 0.029 [0.737]  …82 min
  Over 0.020 [0.508] to 0.039 [0.991] incl  98 min…
  Over 0.010 [0.254] to 0.029 [0.737] incl  …80 min
Copper Alloy UNS No. C52400
M20as hot-rolledOver 0.188 [4.775]55 [380]75 [515]……
060softOver 0.039 [0.991]58 [400]73 [505]35-75…
  Over 0.029 [0.737]  …40-78
  Over 0.020 [0.508] to 0.039 [0.991] incl  25-71…
  Over 0.010 [0.254] to 0.029 [0.737] incl  …29-84
H02half-hardOver 0.039 [0.991]76 [525]91 [625]78-96…
  Over 0.029 [0.737]  …67-80
  Over 0.020 [0.508] to 0.039 [0.991] incl  74-93…
  Over 0.010 [0.254] to 0.029 [0.737] incl   63-77
H04hardOver 0.039 [0.991]94 [650]109 [750]94-101…
  Over 0.029 [0.737]  …78-82
  Over 0.020 [0.508] to 0.039 [0.991] incl  92-100…
  Over 0.010 [0.254] to 0.029 [0.737] incl  …75-81
H06extra-hardOver 0.039 [0.991]107 [740]122 [840]98-103…
  Over 0.029 [0.737]  …80-84
  Over 0.020 [0.508] to 0.039 [0.991] incl  97-102…
  Over 0.010 [0.254] to 0.029 [0.737] incl  …79-83
H08springOver 0.039 [0.991]115 [795]129 [890]99-104…
  Over 0.029 [0.737]  …81-85
  Over 0.020 [0.508] to 0.039 (0.991] incl  98-103…
  Over 0.010 [0.254] to 0.029 (0.737] incl  …80-84
H10extra-springOver 0.039 [0.991]120 (825]133 (915]100-106…
  Over 0.029 [0.737]  …82-86
  Over 0.020 [0.508] to 0.039 [0.991] incl  99-104…
  Over 0.010 [0.254] to 0.029 [0.737] incl  …81-85