ASTM B103 Specification

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

Element Composition, %
Copper Alloy UNS No.
C51000 C51100 C51180 C51900 C52100 C52180 C52400 C53400 A C54400 A
Tin 4.2-5.8 3.5-4.9 3.5-4.9 5.0-7.0 7.0-9.0 7.0-9.0 9.0-11.0 3.5-5.8 3.5-4.5
Phosphorus 0.03-0.35 0.03-0.35 0.01-0.35 0.03-0.35 0.03-0.35 0.01-0.35 0.03-0.35 0.03-0.35 0.01-0.50
Iron, max 0.10 0.10 0.05-0.20 0.10 0.10 0.05-0.20 0.10 0.10 0.10
Lead 0.05 max 0.05 max 0.05 max 0.05 max 0.05 max 0.05 max 0.05 max 0.8-1.2 3.0-4.0
Zinc 0.30 max 0.30 max 0.30 max 0.30 max 0.20 max 0.30 max 0.20 max 0.30 max 1.5-4.5
Nickel - - 0.05-0.20 - - 0.05-0.20 - - -
Copper remainder remainder remainder remainder remainder remainder remainder remainder remainder
Note:

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

Mechanical Properties

Temper DesignationA Thickness, in. [mm] Tensile Strength, ksiB  [MPa] Approximate Rockwell Hardness
Code Name Min Max B Scale Superficial 30–T
Copper Alloy UNS No. C51000
M20 as hot-rolled Over 0.188 [4.775] 40 [275] 60 [415] . . . . . .
O60 soft Over 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        
H02 half-hard Over 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        
H04 hard Over 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        
H06 extra-hard Over 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        
H08 spring Over 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        
H10 extra-spring Over 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
M20 as hot-rolled Over 0.188 [4.775] 40 [275] 58 [400] . . . . . .
060 soft Over 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
H02 half-hard Over 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
H04 hard Over 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
H06 extra-hard Over 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
H08 spring Over 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
H10 extra-spring Over 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
H02 half-hard Over 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
H03 3/4-hard Over 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
H04 hard Over 0.039 [0.991] 85 [585] 100 [690] 88-95 69-75
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
H06 extra-hard Over 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
H08 spring Over 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
H10 extra-spring Over 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
060 soft Over 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
H02 half-hard Over 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
H04 hard Over 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
M20 as hot-rolled Over 0.188 [4.775] 50 [345] 78 [540] . . . . . .
060 soft Over 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
H02 half-hard Over 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
H04 hard Over 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
H06 extra-hard Over 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
H08 spring Over 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
H10 extra-spring Over 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
H02 half-hard Over 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
H03 3/4 hard Over 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 ... ...
H04 hard Over 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
H06 extra-hard Over 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
H08 spring Over 0.039 [0.991] 115 [795] 132 [910] 98-105 ...
Over 0.029 [0.737] ... 80-86
H10 extra-spring Over 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
M20
 as hot-rolled Over 0.188 [4.775]
 55 [380]
 75 [515]
 ... ...
060 soft Over 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
H02 half-hard Over 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
H04 hard Over 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
H06 extra-hard Over 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
H08 spring Over 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
H10 extra-spring Over 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