伸和商事 List of Products and Services

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.

• Other machine elements

The new low beryllium copper round bar product "ESHT/EHT" is a material that achieves both high conductivity and high strength. It features no need for heat treatment (already heat-treated), is lead-free compliant, and supports high current applications, making it ideal for applications that require reliability. It is primarily available in thin rod sizes, with some free samples available. 【Example of Use Cases】 1. Compliance with Environmental Regulations and Safety Lead-free and low beryllium → Responding to the need to replace conventional materials (such as BeCu) as environmental regulations like RoHS and REACH become stricter. 2. Cost and Process Reduction No heat treatment required → Reduces processing steps, achieving shorter delivery times and cost reductions. It is also suitable for prototype and short delivery projects that avoid complex heat treatment processes. 3. Improved Electrical Properties High conductivity → Suitable for high current applications (semiconductor testing equipment, EV charging connectors, power tools, industrial equipment). Ensures stable operation in signal transmission systems (high-speed communication connectors, semiconductor test sockets). 4. Support for Miniaturization and High Density Thin rod compatibility → For fine probe pins, precision contact components, and small terminals for medical devices. Fits well with semiconductor testing fixtures and communication equipment that are advancing towards higher density. *For more details, please contact us or download the materials.

• Coaxial Connectors

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.

• alloy

The new product "ESHT/EHT" made from low beryllium copper round bars is a material that combines high conductivity and high strength. It features no need for heat treatment, is lead-free, and supports high current applications, making it ideal for applications where reliability is essential. We can provide it primarily in thin rod form. 【Example of Applications】 1. Compliance with Environmental Regulations and Safety Lead-free and low beryllium → Responding to the need to replace conventional materials (such as BeCu) as environmental regulations like RoHS and REACH become stricter, while also focusing on reducing health risks for workers. 2. Cost and Process Reduction No heat treatment required → Reduces processing steps, achieving shorter delivery times and cost reductions. It is also suitable for prototype and short delivery projects that avoid complex heat treatment processes. 3. Improved Electrical Properties High conductivity → Suitable for high current applications (EV charging connectors, power tools, industrial equipment) and applications requiring low contact resistance, ensuring stable operation in signal transmission systems (high-speed communication connectors, semiconductor test sockets). 4. Support for Miniaturization and High Density Thin rod compatibility → Fits applications such as fine probe pins, precision contact components, and small terminals for medical devices, aligning well with the increasing density in semiconductor testing jigs and communication equipment. *For more details, please contact us or download the materials.

• Non-ferrous metals

Beryllium copper is a high-performance alloy that combines multiple properties such as high strength, high electrical conductivity, excellent formability, fatigue resistance, heat resistance, and corrosion resistance. It is widely used as a reliable material in various fields, including automotive, semiconductors, and electronic devices. Our company offers two types of beryllium copper, "high beryllium copper" and "low beryllium copper," based on the difference in beryllium content, and we propose the most suitable materials for each application. ■ High beryllium copper (C1720): It excels in high strength, fatigue resistance, and formability, making it ideal for applications that require mechanical properties. ■ Low beryllium copper (BeCu11, etc.): It combines high electrical conductivity and high strength, making it suitable for applications where electrical performance is prioritized. With the realization of a carbon-neutral society and the advancement of digitalization, beryllium copper plays an important role in product development that demands high performance and high reliability. We also accommodate small lot sizes, short delivery times, and provide free samples. For more details, please contact us or download the materials.

• Other metal materials

Beryllium copper is a high-performance alloy that combines multiple properties such as high strength, high electrical conductivity, excellent formability, fatigue resistance, heat resistance, and corrosion resistance. It is widely adopted as a reliable material in various fields, including automotive, semiconductors, and electronic devices. Our company offers two types of beryllium copper, "high beryllium copper" and "low beryllium copper," based on the difference in beryllium content, and we propose the optimal material for each application. ■ High beryllium copper (C1720): It excels in high strength, fatigue resistance, and formability, making it ideal for applications that require mechanical properties. ■ Low beryllium copper (BeCu11, etc.): It combines high electrical conductivity and high strength, suitable for applications where electrical performance is prioritized. With the realization of a carbon-neutral society and the advancement of digitalization, beryllium copper plays an important role in the development of high-performance and high-reliability products. We also accommodate small lot orders, short delivery times, and provide free samples. Please feel free to contact us.

• Non-ferrous metals

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.

• Non-ferrous metals

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.

• Non-ferrous metals

Free-cutting phosphor bronze is an alloy made by adding tin, lead, and a small amount of phosphorus to copper. 【Main Uses】Electrical components such as contacts, connectors, bolts, nuts, and motors; electronic and mechanical parts that undergo cutting processes, such as gears and precision clock components. 【Features】Mechanical strength, high elasticity, machinability, fatigue resistance, and wear resistance. It has good machinability and possesses the mechanical properties of phosphor bronze, making it widely used in products with various processing methods. Free-cutting phosphor bronze round bars are available in various sizes from domestic materials (Fujii Manufacturing Co., Ltd.) (φ1.0 to φ150). For more details, please contact us or download the materials.

• Non-ferrous metals

"Quick-cutting brass" is a type of brass that improves machinability by adding nickel and zinc to copper, along with a small amount of lead. "C7941" significantly enhances machinability compared to conventional brass due to the slight addition of lead. It possesses excellent corrosion resistance and machinability, as well as the beauty of its silver appearance and resistance to discoloration. 【Features】 ■ "C7941" significantly improves machinability compared to conventional brass due to the slight addition of lead. ■ It has excellent corrosion resistance and machinability, along with the beauty of its silver appearance and resistance to discoloration. *For more details, please download the PDF or feel free to contact us.

• alloy

"Nickel silver" is an alloy made by adding nickel and zinc to copper. "C7521" contains 64% copper, 18% nickel, with the remainder being zinc, and has an average nickel content among nickel silvers. It has a beautiful silver luster and is a copper alloy that is resistant to discoloration. Please feel free to contact us when you need it. 【Features】 ■ High corrosion resistance ■ Workability ■ Moderate strength and high springiness *For more details, please download the PDF or feel free to contact us.

• alloy

"High-speed cutting phosphor bronze" is an alloy made by adding tin, lead, and a small amount of phosphorus to copper. The cutting processability, properties, and applications vary depending on the amounts of tin and lead used. "C5341" is an alloy that contains 3.5% to 5.8% tin and 0.8% to 1.5% lead added to copper, while "C5441" is an alloy that contains 3% to 4.5% tin, 3.5% to 4.5% lead (with stock items being less than 4%), and 1.5% to 4.5% zinc added to copper. It has good cutting processability and possesses the mechanical properties of phosphor bronze, making it widely used in various processing methods for products. 【Features】 ■ Mechanical strength ■ High elasticity ■ Cutability ■ Fatigue resistance ■ Wear resistance *For more details, please download the PDF or feel free to contact us.

• alloy

"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.

• alloy

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.

• Non-ferrous metals
• Processing Contract

We would like to introduce the beryllium copper rods that we handle. Beryllium copper is a material known for its excellent corrosion resistance, high ductility before aging treatment, and increased fatigue resistance and conductivity after aging treatment. Its main applications include aircraft engine parts, propellers, bolts, and cams. 【Overview】 ■ Alloy Number: C1720B (BeCuB) ■ Cu (Copper): - ■ Be (Beryllium): 1.8-2.0 ■ Ni + Co: 0.2 or more ■ Ni + Co + Fe: 0.6 or less ■ Cu + Be + Ni + Co + Fe: 99.5 or more *For more details, please refer to the PDF document or feel free to contact us.

• Non-ferrous metals
• Processing Contract

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.

• Non-ferrous metals
• Processing Contract

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.

• Non-ferrous metals
• Processing Contract