Phosphor Bronze

Phosphor Bronze is a copper alloy mainly made of tin and red metal. Unlike red metal and brass, it's hard and strong, with high flexibility. Its strength makes it resistant to deformation during "cold working" processes. Its elasticity and wear resistance make it suitable for springs and "push on/off" switches. It is a copper alloy widely used in daily life.

Phosphor bronze: abrasion resistant with high flexibility and hardness.

Chemical Composition

Type No. Alloy No. Symbol Chemical Composition Features & Application
Plate Ribbon Cu＋Sn＋P Fe Pb Zn Sn P

PB

 C5102

C5102P
C5102R

 ＞99.5 ＜0.10 ＜0.02 ＜0.20 4.5~5.5 0.03~0.35

Features: Good elongation, endurance, and corrosion-resistance.
Application: Electronics, Springs, switches, lead frames, connectors, diaphragms, bellows, fuse clips, and so on used in electronic machine.
C5111

C5111P
C5111R

 ＞99.5 ＜0.10 ＜0.02 ＜0.20 3.5~4.5 0.03~0.35
C5191

C5191P
C5191R

 ＞99.5 ＜0.10 ＜0.02 ＜0.20 5.5~7.0 0.03~0.35

PBS

 C5210

C5210P
C5210R

 ＞99.5 ＜0.10 ＜0.02 ＜0.20 7.0~9.0 0.03~0.35

Features: Good elongation, endurance, and corrosion-resistance.
Application: Switches, relays, and connectors used in machines of electronics, communication information, and measurement.

Mechanical Properties & Physical properties

Alloy No. Mechanical Properties Physical Properties
Quality Grade Symbol
 Tensile
Strength
(Kgf/mm2)		 Yield
Strength
(Kgf/mm2)		 Elongation Hardness Modulus of  elasticity
(GPa)		 Electric Conductivity
(%IACS)		 Specific heat capacity 
﹝J/kg·k﹞		 Density
(g/cm3)		 Coefficient of thermal expansion  (x10-6/K) Thermal conductivity
W/(m·K)
Plate Ribbon Standards Minchali
C5102 1/2H

C5102P-1/2H
C5102R-1/2H

 48~58 — ＞15 130~190 140~170 110 ≧15 377 8.86 17.8 71
3/4H

C5102P-3/4H
C5102R-3/4H

 — — — — 160~190
H

C5102P-H
C5102R-H

 58~68 — ＞7 170~220 180~210
EH

C5102P-EH
C5102R-EH

 63~72 — ＞4 190~230 200~230
SH

C5102P-SH
C5102R-SH

 ＞68 — — ＞200 220~250
C5111 1/2H

C5111P-1/2H
C5111R-1/2H

 42~52 — ＞12 120~180 140~170 110 ≧20 377 8.86 17.8 84
3/4H

C5111P-3/4H
C5111R-3/4H

 46~56 — ＞10 — 160~190
H

C5111P-H
C5111R-H

 50~60 ≧45 ＞7 150~200 180~210
EH

C5111P-EH
C5111R-EH

 58~67 ≧52 ＞3 170~220 200~230
SH

C5111P-SH
C5111R-SH

 ＞66 ≧58 — ≧200 220~250
C5191 1/2H

C5191P-1/2H
C5191R-1/2H

 50~62 ≧46 ＞20 150~205 140~170 105 ≧13 377 8.83 18.0 67
3/4H

C5191P-3/4H
C5191R-3/4H

 — — — — 160~190
H

C5191P-H
C5111R-H

 60~70 ≧53 ＞8 180~230 180~210
EH

C5191P-EH
C5191R-EH

 65~73 ≧61 ＞5 200~240 200~230
SH

C5111P-SH
C5191R-SH

 ≧70 ≧69 — ＞210 220~250
C5210 1/2H

C5210-1/2H
C5210-1/2H

 48~62 ≧27 ＞27 140~205 140~170 110 ≧11 377 8.80 18.2 63
3/4H

C5210-3/4H
C5210-3/4H

 — ≧47 — — 160~190
H

C5210-H
C5210-H

 60~72 ≧45 ＞20 185~235 180~210
EH

C5210-EH
C5210-EH

 70~80 ≧60 ＞11 210~260 200~230
SH

C5210-SH
C5210-SH

 75~85 ≧65 ＞9 230~270 220~250
ESH

C5210-ESH
C5210-ESH

 79~90 ≧70 ＞5 245~285 230~260