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Phosphor Bronze Plates and Strips

*Please contact us if you have any specific requests regarding chemical compositions, mechanical properties, and thicknesses.

Chemical Composition

Alloy No. Chemical Composition（%）
Sn P Fe Pb Zn Cu+Sn+P
C5050 1.0～1.7 ≦ 0.15 ≦ 0.10 ≦ 0.02 ≦ 0.20 ≧ 99.5
HRD200 1.7～2.3 ≦ 0.15
C5111 3.5～4.5 0.03～0.35
C5102 4.5～5.5
C5191 5.5～7.0
C5212 7.0～9.0

Mechanical Properties

Alloy No. Temper Tension Test Hardness Test
Thickness Category
㎜		 Tensile Strength
N/m㎡		 Elongation
%		 Thickness Category
㎜		 Vickers Hardness
HV*1
C5050 O ≧ 0.10
≦ 5.0		 ≧ 240 ≧ 40 － －
1/4H ≧ 0.10
≦ 5.0		 240～330 ≧ 30 ≧ 0.15
≦ 5.0		 60～120
1/2H ≧ 0.10
≦ 5.0		 330～450 ≧ 10 ≧ 0.10
≦ 5.0		 90～155
H ≧ 0.10
≦ 5.0		 390～500 ≧ 3 ≧ 0.10
≦ 5.0		 120～165
EH ≧ 0.10
≦ 5.0		 ≧ 460 － ≧ 0.05
≦ 5.0		 ≧ 140
HRD200 O ≧ 0.10
≦ 5.0		 ≧ 300 ≧ 30 ≧ 0.10
≦ 5.0		 70～115
1/2H ≧ 0.10
≦ 5.0		 400～500 ≧ 10 ≧ 0.10
≦ 5.0		 125～165
H ≧ 0.10
≦ 5.0		 450～550 ≧ 5 ≧ 0.10
≦ 5.0		 150～185
EH ≧ 0.10
≦ 5.0		 500～600 ≧ 2 ≧ 0.10
≦ 5.0		 175～205
SH ≧ 0.10
≦ 5.0		 600～700 － ≧ 0.10
≦ 5.0		 185～215
C5111 O ≧ 0.10
≦ 5.0		 ≧ 295 ≧ 38 － －
1/4H ≧ 0.10
≦ 5.0		 345～440 ≧ 25 ≧ 0.15
≦ 5.0		 80～150
1/2H ≧ 0.10
≦ 5.0		 410～510 ≧ 12 ≧ 0.10
≦ 5.0		 120～180
H ≧ 0.10
≦ 5.0		 490～590 ≧ 7 ≧ 0.10
≦ 5.0		 150～200
EH ≧ 0.10
＜ 0.20		 570～660 － ≧ 0.05
≦ 5.0		 170～220
≧ 0.20
≦ 5.0		 ≧ 3
SH ≧ 0.10
≦ 5.0		 ≧ 640 － ≧ 0.05
≦ 5.0		 ≧ 200
C5102 O ≧ 0.10
≦ 5.0		 ≧ 305 ≧ 40 － －
1/4H ≧ 0.10
≦ 5.0		 375～470 ≧ 28 ≧ 0.10
≦ 5.0		 90～160
1/2H ≧ 0.10
≦ 5.0		 470～570 ≧ 15 ≧ 0.10
≦ 5.0		 130～190
H ≧ 0.10
≦ 5.0		 570～665 ≧ 7 ≧ 0.10
≦ 5.0		 170～220
EH ≧ 0.10
＜ 0.20		 620～710 － ≧ 0.05
≦ 5.0		 190～230
≧ 0.20
≦ 5.0		 ≧ 4
SH ≧ 0.10
≦ 5.0		 ≧ 660 － ≧ 0.05
≦ 5.0		 ≧ 200
C5191 O ≧ 0.10
≦ 5.0		 ≧ 315 ≧ 42 － －
1/4H ≧ 0.10
≦ 5.0		 390～510 ≧ 35 ≧ 0.10
≦ 5.0		 100～160
1/2H ≧ 0.10
≦ 5.0		 490～610 ≧ 20 ≧ 0.10
≦ 5.0		 150～205
H ≧ 0.10
≦ 5.0		 590～685 ≧ 8 ≧ 0.10
≦ 5.0		 180～230
EH ≧ 0.10
＜ 0.20		 635～720 － ≧ 0.05
≦ 5.0		 200～240
≧ 0.20
≦ 5.0		 ≧ 5
SH ≧ 0.10
≦ 5.0		 ≧ 690 － ≧ 0.05
≦ 5.0		 ≧ 210
C5212 O ≧ 0.10
≦ 5.0		 ≧ 345 ≧ 45 － －
1/4H ≧ 0.10
≦ 5.0		 390～510 ≧ 40 ≧ 0.10
≦ 5.0		 100～160
1/2H ≧ 0.10
≦ 5.0		 490～610 ≧ 30 ≧ 0.10
≦ 5.0		 150～205
H ≧ 0.10
≦ 5.0		 590～705 ≧ 12 ≧ 0.10
≦ 5.0		 180～235
EH ≧ 0.10
＜ 0.20		 ≧ 685 － ≧ 0.05
≦ 5.0		 ≧ 210
≧ 0.20
≦ 5.0		 ≧ 5
Note: The above standards are partially quoted from JIS H3110.
*1 Minimum test force is 1.961N

Thickness Tolerances

C5050・HRD200・C5111・C5102・C5191・C5212（Phosphor Bronze）
Unit：mm
Thickness Tolerance (width)
≦ 400
≧ 0.05 ≦ 0.08 ±0.005
＞ 0.08 ≦ 0.15 ±0.008
＞ 0.15 ≦ 0.25 ±0.013
＞ 0.25 ≦ 0.4 ±0.018
＞ 0.4 ≦ 0.55 ±0.020
＞ 0.55 ≦ 0.7 ±0.025
＞ 0.7 ≦ 0.9 ±0.030
＞ 0.9 ≦ 1.2 ±0.035
＞ 1.2 ≦ 1.5 ±0.045
＞ 1.5 ≦ 2 ±0.05
＞ 2 ≦ 3 ±0.06
Note: The above standards are partially quoted from JIS H3110. Double the above values when changing the tolerance from (±) to only (+) or (-)

Phosphor Bronze Plates and Strips for Springs

*Please contact us if you have any specific requests regarding chemical composition, mechanical properties, and thicknesses.

Chemical Composition

Alloy No. Chemical Composition（%）
Sn P Fe Pb Zn Cu+Sn+P
C5210 7.0～9.0 0.03～0.35 ≦ 0.10 ≦ 0.02 ≦ 0.20 ≧ 99.5
C5240 9.0～11.00 0.03～0.35 ≦ 0.10 ≦ 0.02 ≦ 0.20 ≧ 99.5

Mechanical Properties

Alloy No. Temper Tension Test Elastic Limit Test of Spring Hardness Test
Thickness Category
mm		 Tensile Strength
N/m㎡		 0.2% Yield Strength
N/m㎡		 Elongation
%		 Thickness Category
mm		 Elastic Limit of Spring
(Kb0.1)
N/m㎡		 Thickness Category
mm		 Vickers Hardness
HV*1
C5210 1/2H ≧ 0.10
≦ 1.6		 470～610 ≧ 260 ≧ 27 ≧ 0.15
≦ 1.6		 ≧ 245 ≧ 0.10
≦ 1.6		 140～205
H ≧ 0.10
≦ 1.6		 590～705 ≧ 450 ≧ 20 ≧ 0.15
≦ 1.6		 ≧ 390 ≧ 0.10
≦ 1.6		 185～235
EH ≧ 0.10
≦ 1.2		 685～785 ≧ 580 ≧ 11 ≧ 0.15
≦ 1.6		 ≧ 460 ≧ 0.10
≦ 1.2		 210～260
SH ≧ 0.10
≦ 1.2		 735～835 ≧ 640 ≧ 9 ≧ 0.15
≦ 1.6		 ≧ 510 ≧ 0.10
≦ 1.2		 230～270
ESH ≧ 0.10
≦ 0.40		 770～885 ≧ 690 ≧ 5 ≧ 0.15
≦ 1.6		 ≧ 560 ≧ 0.10
≦ 0.4		 245～285
C5240 H ≧ 0.10
≦ 1.6		 650～750 ≧ 510 ≧ 11 ≧ 0.15
≦ 1.6		 ≧ 430 ≧ 0.10
≦ 1.6		 200～240
EH ≧ 0.10
≦ 0.80		 750～850 ≧ 630 ≧ 9 ≧ 0.15
≦ 1.6		 ≧ 510 ≧ 0.10
≦ 0.8		 230～270
SH ≧ 0.10
≦ 0.40		 850～950 ≧ 750 ≧ 5 ≧ 0.15
≦ 1.6		 ≧ 570 ≧ 0.10
≦ 0.40		 250～300
ESH ≧ 0.10
≦ 0.40		 ≧ 950 ≧ 870 － ≧ 0.15
≦ 1.6		 ≧ 630 ≧ 0.10
≦ 0.40		 ≧ 270
XSH ≧ 0.10
≦ 0.40		 ≧ 1000 ≧ 930 － ≧ 0.15
≦ 1.6		 ≧ 700 ≧ 0.10
≦ 0.40		 ≧ 290
Note: The above standards are partially quoted from JIS H3130.
*1 Minimum test force is 1.961N

Thickness Tolerances

C5210・C5240
Unit：mm
Thickness Tolerance (width)
≦ 400
≧ 0.05 ≦ 0.08 ±0.005
＞ 0.08 ≦ 0.15 ±0.008
＞ 0.15 ≦ 0.25 ±0.013
＞ 0.25 ≦ 0.4 ±0.018
＞ 0.4 ≦ 0.55 ±0.020
＞ 0.55 ≦ 0.7 ±0.025
＞ 0.7 ≦ 0.9 ±0.030
＞ 0.9 ≦ 1.2 ±0.035
＞ 1.2 ≦ 1.5 ±0.045
＞ 1.5 ≦ 2.0 ±0.050

HQ Phosphor Bronze with High Strength and Bending Workability

As electronic devices and parts become smaller and thinner, the need for high strength and precision in the phosphor bronze as the base material also increases.

To meet these needs, we have established a production system for High Quality phosphor bronze with high bending workability (HQ series) in addition to our existing lineup.


Physical Properties

The HQ series is a phosphor bronze with improved mechanical properties through controlling the machining process. It has the same alloy composition as regular phosphor bronze and its physical properties are maintained.

Alloy No.

 C5191 C5210 C5240

Melting Point（Liquidus）

 1040℃ 1020℃ 1000℃

Melting Point（Solidus）

 900℃ 880℃ 845℃

Specific Gravity

8.82 8.80 8.78

Linear Expansion Coefficient

18.2×10-6 /K

18.2×10-6 /K

18.4×10-6 /K

Thermal Conductivity

67 W/m・K

63 W/m・K

50 W/m・K

Electrical Conductivity

14 %IACS

12 %IACS

10 %IACS

Specific Heat

375 J/Kg・K

377 J/Kg・K

375 J/Kg・K

Modulus of Elasticity（Tension）

115 kN/m㎡

110 kN/m㎡

105 kN/m㎡

Modulus of Elasticity（Deflection）

105 kN/m㎡

100 kN/m㎡

100 kN/m㎡

Chemical Composition

【Harada's Management Standard】The chemical composition of the HQ series is the same as conventional phosphor bronze. We make use of its advantages as a specialized manufacturer of phosphor bronze to manage impurities even more strictly.
Specifications Sn P Pb Zn Fe Cu+Sn+P
C5191

5.5～7.0

0.03～0.20

0.01max

0.01max

0.01max

99.8min
C5210

7.0～9.0

0.03～0.20

0.01max

0.01max

0.01max

99.8min
C5240

9.0～11.0

0.04～0.20

0.01max

0.01max

0.01max

99.8min
Standard

―

0.03～0.35

0.02max

0.20max

0.10max

99.5min

Product Size

HQ phosphor bronze is developed with the below tempers and thicknesses. Please contact us for inquiries about other sizes.

Type

Thickness

Temper

H EH SH ESH XSH

C5191HQ

0.05～0.30mm ○ ○ ○ ― ―

C5210HQ

○ ○ ○ ○ ○

C5240HQ

○ ○ ○ ○ ○

Mechanical Properties

The below are typical examples of HQ and Harada’s average.
Alloy No. Temper Symbol Tensile Strength　N/m㎡ 0.2% Yield Strength　N/m㎡ Elongation　% Hardness HV Elastic Limit of Spring　N/m㎡
C5191 H Standard 590～685 － 8min 180～230 －
HQ 630 614 22.6 203 －
Harada’s average 620 600 17.6 202 －
EH Standard 635～720 － 5min 200～240 －
HQ 699 697 13.7 214 －
Harada’s average 690 662 11.0 213 －
SH Standard 690min － － 210min －
HQ 744 739 12.7 222 －
Harada’s average 725 710 8.3 216 －
C5210 H Standard 590～705 450min 20min 185～235 390min
HQ 616 569 35.3 197 469
Harada’s average 615 549 28.6 193 462
EH Standard 685～785 580min 11min 210～260 460min
HQ 721 694 23.2 229 563
Harada’s average 724 684 17.0 228 554
SH Standard 735～835 640min 9min 230～270 510min
HQ 778 773 13.3 242 632
Harada’s average 771 756 11.4 240 627
ESH Standard 770～885 690min 5min 245～285 560min
HQ 845 834 9.3 258 648
Harada’s average － － － － －

XSH

*

 Standard 835～1000 － 1min － 630min
HQ 979 968 2.1 285 706
Harada’s average － － － － －
C5240 H Standard 650～750 510min 11min 200～240 430min
HQ 693 657 25.6 223 558
EH Standard 750～850 630min 9min 230～270 510min
HQ 800 783 15.3 245 585
SH Standard 850～950 750min 5min 250～300 570min
HQ 890 877 9.2 267 661
ESH Standard 950min 870min － 270min 630min
HQ 1000 988 2.4 285 718
XSH Standard 1000min 930min － 290min 700min
HQ 1058 1044 2.0 305 883
Note: The above standards are partially quoted from JIS H3130. Applicable thicknesses are ≥0.05mm and ≤0.3mm.
*Internal standards are shown because the products are not standardized by JIS H3130(2018)

Thickness Tolerances (Common to both HQ series and Harada’s average)

C5240
Unit：mm
Thickness Our Achievements Standard
≧ 0.05㎜ ,≦ 0.08㎜ ±0.002㎜ ±0.005㎜
＞ 0.08㎜ ,≦ 0.15㎜ ±0.002㎜ ±0.008㎜
＞ 0.15㎜ ,≦ 0.25㎜ ±0.003㎜ ±0.013㎜
＞ 0.25㎜ ,≦ 0.30㎜ ±0.004㎜ ±0.018㎜
Note: The above standards are partially quoted from JIS H3130.

Copper Alloy Thatched Roof Material

The 10th “MIYAGI SUGUREMONO” association certification
Low thermal conductivity roof & siding board as building materials.

Low thermal conductivity metals are suitable due to their excellent heat insulation.

Copper alloy plate thatched roof material is made with a small amount of tin and phosphorous as the main components. It has excellent strength, wear resistance, has excellent bending and drawing workability and is strongly resistant to chemical corrosion.

Copper Alloy Thatched Roof Material : Merit

Copper alloy thatched roof material is a low thermal conductivity roofing material and lightweight, which means less weight on the roof, and has excellent durability and wear resistance, therefore maintenance is not necessary. In addition to copper having high recyclability and high value when it is replaced or removed, copper alloy plate costs about 70 to 75% less than titanium. In addition, through our development of equipment aimed at automating sulfurization, we are able to provide stable quality and flatness. Thanks to this, our copper alloy plate has been attracting attention and users’ demands.


Professor Oikawa Katsunari, Doctor of Engineering, Tohoku University School of Engineering
Associate Professor Ishihara Saori, Doctor of Engineering, Chiba Institute of Technology Department of Architecture and Civil Engineering

Product Name Thermal Conductivity
(W/m・K)		 Weight
（kg/㎡）		 Maintenance
Copper Alloy Steel thatched roof material 205 4.5 Unnecessary
Phosphorus deoxidized copper 339 4.4 Unnecessary
Slate 0.4 17～50 several times/year
Clay tiles 0.5 32～46 several times/year
Titanium 22 6～7 unnecessary

Japan Metal Roofing Association

Stable Quality and Rich Color Tone Changes

The color tone can be changed depending on the thickness of the copper sulfide coating, making it possible to match that of various types of renovated buildings. We are the only company in Japan that can carry out integrated mills from automated melt-casting to sulfurizing machines. Copper alloy plate’ color tone after changes the rapid artificial oxidation, sulfurization and chloride reaction, due to chemical reactions. Copper sulfurization processing is one type of "copper coloring" and creates a deep and calming style. It has received high praise for its adaptability to a wide variety of uses.

HS-M (maroon)

HS-B (black)

(before sulfurization)

*We can also ship 30 to 50kg coiled fiber drums.

*The above color chart is for illustrative purposes only; please refer to the actual sample book when considering.

Sulfurization Processing Machine

Patina Generation

Copper alloy plate thatched roof material grows a natural patina that is equal to or faster than phosphorous deoxidized copper.

How it is Used

Highly Antibacterial and Antiviral/Non-Magnetic Phosphor Bronze HAVB105

A newly patented non-magnetic material with better semi-permanent antibacterial properties than pure copper and that expands the use of zinc, nickel and chromium.

Patented Highly Antibacterial Phosphor Bronze

Our "HAVB105" with a 1.05% tin mixture as a component, showed high antibacterial and antiviral activity against various pathogenic bacteria, in a JIS test conducted by an external inspection agency. This result overturned the theory that "pure copper is the best anti-bacterial copper," and we have obtained a patent to enable us to produce products that utilize these properties.

*Technical development was done through joint research and academic guidance with Tohoku University.
［Patent No. 5656138］ "Phosphor bronze alloy with antibacterial properties and products using it."
［Patent No. 6473984］
Medical device manufacturing ClassⅠregistration certificate

Halo Experiment

Place a sample in the center of an agar medium inoculated with the test strain and measure the growth inhibition zone (halo) formed at the four edges of the sample after 48 hours of culturing at 37±2℃.

Film Test

A film is attached to a sample inoculated with the test bacterial solution, then cultured at 35±1℃ for 24 hours in an incubator. Bacteria adhering to the sample and film are washed out, and the viable cell count is measured.

Expanding Development of New Products with Highly Antibacterial and Antiviral Properties

High-pressure water is used to atomize molten metal into small powders. The surface area approximately triples and shows a halo that is two to five times wider. Our aim is to match demand (needs) by having a lot of shapes, such as three-dimensional (plate-like products), two-dimensional (linear products) and one-dimensional (powder products).

Product Development Applying Anti-algal Effect

The highly antibacterial properties of HAVB105 also demonstrate an anti-algal effect. In addition, by winding HAVB105 around different materials, its new uses are expanding for water quality conservation in water treatment facilities such as garden ponds, water tanks, and water purification plants.

Measurements of anti-algal effect of antibacterial copper alloy (after 4 months from the start of the test)