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Hyper Phosphor Bronze

Overview

For decades, we have been working to improve the properties of phosphor bronze. Thanks to precision process control technology, we have succeeded in developing Hyper Phosphor Bronze, with superior strength and bend formability despite having similar alloy makeup as conventional products. We have obtained a wide range of patents covering Hyper Phosphor Bronze, and have achieved the top market share in the industry.
Phosphor bronze is a copper alloy that has tin and phosphorus as its main alloying elements. Combining high strength and bend formability, it is used mainly for connector pins in personal computers, mobile phones, and other electronic devices. Today this alloy has become an indispensable metal material in our data-driven society.

Compare Features and Typical Applications

Alloy name Composition Features Applications
  • Hyper Series
 Cu-8Sn Phosphor bronze for springs, with enhanced strength and bend formability Connectors, switches
  • Hyper Series
 Cu-10Sn Strength superior to C5210 (HP) Connectors, switches

Compare Composition and Properties

Composition and Properties of Hyper Phosphor Bronze and Phosphor Bronze

Chemical Composition (wt%)

Copper Alloy Name Hyper Phosphor Bronze Phosphor Bronze
C5210
(HP)		 C5240
(HP)		 C5111 C5102 C5191 C5212 C5210
Chemical Composition (wt%) Cu : Rest
Sn : 8.0
P : 0.2		 Cu : Rest
Sn : 10.0
P : 0.15		 Cu : Rest
Sn : 4.0
P : 0.08		 Cu : Rest
Sn : 5.0
P : 0.2		 Cu : Rest
Sn : 6.0
P : 0.2		 Cu : Rest
Sn : 8.0
P : 0.2		 Cu : Rest
Sn : 8.0
P : 0.2

Physical Properties

Copper Alloy Name Hyper Phosphor Bronze Phosphor Bronze
C5210
(HP)		 C5240
(HP)		 C5111 C5102 C5191 C5212 C5210
Specific Gravity (g/cm3) 8.80 8.78 8.87 8.86 8.83 8.80 8.80
Modulus of Elasticity (GPa) 110 100 110 110 110 110 110
Electrical Conductivity
(%IACS @20℃)		 12 10 17 15 14 13 13
Poisson's Ratio 0.33 0.33 0.33 0.33 0.33 0.33 0.33

Mechanical Properties

Copper Alloy Name Hyper Phosphor Bronze Phosphor Bronze
C5210
(HP)		 C5240
(HP)		 C5111 C5102 C5191 C5212 C5210
Tensile Strength (MPa) O - - 295min 305min 315min 345min -
1/4H - - 345-440 375-470 390-510 390-510 -
1/2H - - 410-510 470-570 490-610 490-610 470-610
H 590-705 650-750 490-590 570-665 590-685 590-705 590-705
EH 685-785 750-850 570min 620min 635min 685min 685-785
SH 735-835 850-950 - - - - 735-835
ESH 770-885 950-1050 - - - - -
XSH 835-1000 1000-1200 - - - - -
0.2% Yield
Strength (MPa)		 O - - - - - - -
1/4H - - - - - - -
1/2H - - - - - - -
H (565) 580-690 - - - - (528)
EH (688) 650-790 - - - - (667)
SH (760) 780-920 - - - - (710)
ESH (823) 900-1030 - - - - -
XSH (879) 950-1190 - - - - -
Elongation (%) O - - 38min 40min 42min 45min -
1/4H - - 25min 28min 35min 40min -
1/2H - - 12min 15min 20min 30min 27min
H 20min 11min 7min 7min 8min 12min 20min
EH 11min 9min 3min 4min 5min 5min 11min
SH 9min 5min - - - - 9min
ESH 5min 1min - - - - -
XSH 1min - - - - - -
Vickers
Hardness (Hv)		 O - - - - - - -
1/4H - - 80-150 90-160 100-160 100-160 -
1/2H - - 120-180 130-190 150-205 150-205 140-205
H 185-235 200-240 150-200 170-220 180-230 180-235 185-235
EH 210-260 230-270 - 190min 200min 210min 210-260
SH 230-270 250-290 - - - - 230-270
ESH 245-285 270-310 - - - - -
XSH - 290min - - - - -
  • Standard specs. (Typical values)

Formability

Copper Alloy Name Hyper Phosphor Bronze Phosphor Bronze
C5210
(HP)		 C5240
(HP)		 C5111 C5102 C5191 C5212 C5210
Minimum Bend
Radius / t Badway		 1/2H - - - - - - -
H 0.0 0.0
(t=0.1mm)		 - - - - 0.5
EH 0.5 1.0
(t=0.1mm)		 - - - - 2.0
SH 2.0 3.0
(t=0.1mm)		 - - - - 2.5
ESH 4.0 - - - - - -
  • Bad way 90°W-shape Bending Width=10mm
Explanation of technical terms
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