伸和商事 List of Products and Services

We stock products such as phosphor bronze, nickel silver, and beryllium copper as standard lengths. However, we understand that there are often requests like the following: ■ I would like to have thick materials cut before processing. ■ I need a small quantity, so I would like to purchase in small lots. ■ Due to transportation weight and processing machine specifications, I would like them cut in half before delivery. At Shinwa Shoji, we provide the necessary items in the required quantities with the fastest delivery times. We ship long products (standard round bars of 2000mm to 2500mm) and standard plates, whether in small quantities or over several hundred kilograms, to locations nationwide. If you have any issues, such as needing prototypes or urgent arrangements for copper alloys, please feel free to contact us.

"Aluminum bronze" is an alloy made by adding tin and a small amount of phosphorus to copper. "C5191" is an alloy with 5.5% to 7% tin added to copper, while "C5212" is a material that has increased hardness by adding even more tin. Since C5191 and C5212 do not contain lead, they are difficult-to-machine materials in precision cutting processes, but they are highly ductile and have good bending and plating properties. 【Features】 ■ Mechanical strength ■ High elasticity ■ Corrosion resistance ■ Fatigue resistance ■ Wear resistance *For more details, please download the PDF or feel free to contact us.

Phosphor bronze and beryllium copper are generally used as high-strength and high-spring materials in electronic components and mechanical parts among copper alloys, and many of the users are likely to be involved in machining. Our company has a proven track record in sales for various applications, including musical instruments, test pieces, daily products, models, and more, ranging from small quantity sales to mass production. In particular, we can assist with issues such as: - Inability to obtain materials in time - Difficulty in small quantity sales - Lack of mill certificates - No shipping options to remote areas - Uncertainty in arranging environmental documentation - Mistakes in arrangements by the purchasing department There are various reasons and circumstances that may cause difficulties, but in such cases, please feel free to contact us. Additionally, based on our long-standing sales experience, we may be able to obtain products that are not widely available in the market. We have phosphor bronze and beryllium copper in stock in round bars and standard-sized plates.

We would like to introduce the free-cutting phosphor bronze rods and general phosphor bronze rods that we handle. Phosphor bronze is an alloy made by adding tin to copper, and it possesses spring properties, corrosion resistance, fatigue resistance, and wear resistance. Its main applications include rods used in gears, shafts, bearings, bolts, nuts, connectors, and more. Free-cutting phosphor bronze is an improved version of phosphor bronze with enhanced machinability by adding lead (Pb). 【Product Lineup】 ■C5191B(PBB2) ■C5212B(PBB3) ■C5341B(PbPBB1) ■C5441B(PbPBB2) ■FX400B *For more details, please refer to the PDF document or feel free to contact us.

Phosphor bronze is an alloy made by adding tin and a small amount of phosphorus to copper. C5191 is an alloy that contains 5.5% to 7% tin added to copper. C5210 is a material that increases hardness by adding more tin. In particular, C5210 has high spring properties and is suitable for leaf springs with minimal bending processing. 【Features】Mechanical strength, high spring properties, ductility, corrosion resistance, fatigue resistance, wear resistance 【Main Applications】Springs for electronic and electrical equipment, switches, connectors, relays, lead frames, diaphragms, bellows, fuse clips, moving parts, washers, bearings, bushes, etc. We mainly stock standard plates (180mm × 1200mm) from domestic materials (Ooki Shindou Kogyo Co., Ltd.). We can accommodate cutting for thick plate products of 3.0mm or more. Stock items can be sold from one piece. We offer shipping to remote areas. Standard plates are not suitable for large-scale processing but are very convenient for small-scale processing. Please inquire about stock status. We have a rich inventory of plate thicknesses from 0.1mm to 12mm.

Here is a case study of the antibacterial bronze triangle "Ringuru" that we produced. With a diameter of 10mm and a side length of 180mm, we used C5191B-H as the material. The material itself has antibacterial properties, making it suitable as a shared instrument, and it features a soft sound quality, particularly characterized by a long and resonant sustain. 【Features】 ■ A triangle reborn with the "high elasticity" of bronze ■ The material itself has antibacterial properties ■ Well-suited as a shared instrument ■ Soft sound quality, particularly resonant with a long sustain *For more details, please refer to the PDF document or feel free to contact us.

Phosphor bronze is a copper alloy primarily used in electrical and electronic components as contacts and conductive terminals. It is an alloy made by adding tin and a small amount of phosphorus to copper, resulting in a material with excellent spring properties and adjustable hardness and workability depending on the amount of tin and the finishing treatment. It is used in numerous products, particularly in electronic components, such as connectors, switches, and relays, where repeated operations and contact points are involved. As a copper alloy, it encompasses essential properties required for electrical and electronic components, including wear resistance, high strength, high heat resistance, and springiness, making it one of the important materials supporting modern society. Phosphor bronze is chosen for its price, performance, and availability, as well as its long-standing track record and reliability. Our company stocks standard sheets and round bars of phosphor bronze. We have a particularly rich lineup of phosphor bronze, including spring phosphor bronze in addition to the standard variety. If you are interested in any products, please feel free to contact us.

Phosphor bronze, nickel silver, and beryllium copper are available in standard lengths, mostly 2000mm or 2500mm. However, many customers prefer to purchase cut pieces due to prototyping, the machines used, and transportation considerations, especially for free-cutting materials, where most thicker items are sold as cut pieces. Shinwa Trading conducts processing and sales through band saw cutting, providing cutting and delivery with the shortest lead time. In recent years, the miniaturization of electronic and electrical components has led to a demand for lighter, thinner, and smaller materials. Particularly, the prices of copper alloys have risen, and there is a desire to purchase only the necessary materials in the required amounts for product prototyping, which often requires advanced processing. Sales are available from a minimum length of 3mm (or 8mm depending on the diameter). We can also accommodate small quantities of various types. We can provide various mill sheets and environmental materials for our products. Phosphor bronze (C5191/C5212) Free-cutting phosphor bronze (C5341/C5441) Nickel silver (C7521) Free-cutting nickel silver (C7941) Beryllium copper (25 alloy) We also offer cut sales of some thick phosphor bronze plates and beryllium copper thick plates and blocks. We appreciate your consideration of these as well.

Our company has been a primary wholesaler specializing in unique non-ferrous metals, such as [phosphor bronze bars, nickel silver bars, beryllium copper bars], since its establishment in 1964. Our management philosophy of "coexistence and co-prosperity" is not only about pursuing our own sales and profits but also about making tireless efforts to ensure that all our partners can achieve profits as well. This is our motto. We are determined to become a company that is loved by many customers and will strive to achieve this goal. 【Partner Manufacturers】 ■ Fujii Seisakusho Co., Ltd. (Major trading partner) ■ NGK Insulators, Ltd. (Major trading partner) ■ Oki Shindou Kogyo Co., Ltd. *For more details, please refer to the PDF document or feel free to contact us.

In the electronics industry, connectors are crucial components that influence the reliability of products. In particular, reliable transmission of electrical signals and long-term durability are required. The materials for connectors must possess high strength, elasticity, corrosion resistance, fatigue resistance, and wear resistance, and phosphor bronze is chosen as a material that meets these characteristics. Our free-cutting phosphor bronze rods and general phosphor bronze rods are products that meet these demands. 【Application Scenarios】 - Manufacturing connectors for electronic devices - Connection parts for electronic components - Parts for precision instruments 【Benefits of Implementation】 - Improved durability of connectors - Enhanced reliability of products - Long-term cost reduction

In the automotive industry, high durability and wear resistance are required for motor bearings. Since they are used in harsh environments such as engines and transmissions, the performance of the bearings affects the overall reliability of the vehicle. Proper material selection is essential to extend product life and reduce maintenance costs. The free-cutting phosphor bronze rods and general phosphor bronze rods we handle are copper alloys that excel in high strength and wear resistance to meet these demands. 【Application Scenarios】 - Automotive bearings - Ultrasonic motor stators - Transmission components - Engine components 【Benefits of Implementation】 - Extended bearing lifespan - Improved wear resistance - Reduced maintenance costs - Enhanced vehicle reliability

In the aerospace industry, high safety and reliability are required, and components must possess excellent strength, wear resistance, and fatigue resistance. Bushings play a crucial role in reducing friction in moving parts and preventing wear. Phosphor bronze has excellent properties that meet these demands, making it ideal for aerospace applications. Our free-cutting phosphor bronze rods and general phosphor bronze rods are available in a wide range of sizes and abundant stock to meet our customers' needs. 【Application Scenarios】 - Aircraft engine components - Aircraft landing gear - Aircraft control systems 【Benefits of Implementation】 - Increased longevity of components due to high strength and wear resistance - Improved efficiency through reduced friction resistance - Stable performance maintenance under harsh environmental conditions

In the medical device industry, precision components require high strength and corrosion resistance. Additionally, since these products are related to human life, the reliability of the components is extremely important. Phosphor bronze possesses excellent characteristics that meet these demands. The phosphor bronze rods we handle are high-strength yet excel in corrosion resistance, fatigue resistance, and wear resistance, making them ideal for precision components in medical devices. In particular, there are very few wholesalers in Japan that maintain a steady stock of C5212 and C5099. 【Application Scenarios】 - Medical testing equipment - Surgical instruments - Precision measuring instruments 【Benefits of Implementation】 - Extended product lifespan due to high durability - Improved product reliability due to high corrosion resistance - High-precision component manufacturing through precision machining

In the semiconductor manufacturing equipment industry, jigs that require high precision in positioning, fixing, and thermal conductivity are essential. Particularly for jigs that handle wafers and substrates, high strength, wear resistance, and precise machinability are indispensable. Inappropriate materials or processing can lead to a decline in equipment performance or failure. Our free-cutting phosphor bronze rods and general phosphor bronze rods are the optimal materials to meet these demands. 【Application Scenarios】 - Jigs for wafer transport - Jigs for substrate fixation - Precision positioning jigs for components 【Benefits of Implementation】 - Increased longevity of jigs due to high strength and wear resistance - Achieving high precision positioning through excellent machinability - Ability to deliver in a short time frame due to ample inventory

In the manufacturing of musical instruments, tone quality and durability are extremely important factors. The materials used must possess vibration characteristics and corrosion resistance. Phosphor bronze is a material that meets these requirements. Free-cutting phosphor bronze rods and general phosphor bronze rods have high strength while also possessing springiness, corrosion resistance, fatigue resistance, and wear resistance, making them very easy to process. They contribute to the improvement of the quality of various components. 【Application Scenarios】 - Manufacturing of reeds for saxophones and clarinets - Manufacturing of mouthpieces for brass instruments - Manufacturing of parts for reed instruments - Parts for percussion instruments - Triangles, etc. - Manufacturing of beaters 【Effects of Introduction】 - Improved durability of reeds - Enhanced stability of tone quality - Extended lifespan of instruments