Product

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 |
*1 Minimum test force is 1.961N
Thickness Tolerances
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 |

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 |
*1 Minimum test force is 1.961N
Thickness Tolerances
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
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
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
Type |
Thickness |
Temper |
||||
---|---|---|---|---|---|---|
H | EH | SH | ESH | XSH | ||
C5191HQ |
0.05~0.30mm | ○ | ○ | ○ | ― | ― |
C5210HQ |
○ | ○ | ○ | ○ | ○ | |
C5240HQ |
○ | ○ | ○ | ○ | ○ |
Mechanical Properties
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 |
*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)
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㎜ |

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

Film Test

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)
