伸和商事 Product Lineup

"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.

"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.

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.

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.

Nickel silver is an alloy made by adding nickel and zinc to copper. It has a beautiful silver luster and is a type of copper alloy with high corrosion resistance and fatigue resistance, making it difficult to discolor in air and seawater. Lead-added free-cutting nickel silver is rich in machinability and is easy to process even with general-purpose lathes, making it suitable for various applications. We have a large stock of nickel silver and free-cutting nickel silver round bars, with short delivery times and immediate availability. Our company is the only one in the country that stocks a wide range of sizes. We perform cutting processes in-house and can sell even one piece. We also accommodate prototypes and small-scale processing. Applications and Case Studies: Eyeglasses, musical instruments, fishing gear, decorative items, model trains, keys, automotive parts, marine components, etc. Due to the wide range of applications, we receive inquiries from various users. We also sell to general customers, individuals processing items, and hobbyists.

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 jewelry industry, design and durability are essential. For example, clasps not only affect the aesthetic of the product but also need to withstand long-term use. It is important to choose materials that are resistant to discoloration and have excellent workability. Free-cutting brass round bars (C7941) meet these needs. 【Usage Scenarios】 * Clasps for necklaces and bracelets * Parts for earrings and ear studs * Decorative metal fittings for bags and wallets 【Benefits of Introduction】 * Enhances product value with a beautiful silver appearance * Excellent workability allows for easy production of complex-shaped clasps * Corrosion resistance maintains aesthetic appeal over a long period

In the model parts industry, precision machining and beautiful appearance are required. In particular, for wheels, which influence the overall quality of the model, ease of machining, a beautiful silver appearance, and corrosion resistance that is not prone to discoloration are important. Free-cutting brass round bars (C7941) can meet these needs. 【Application Scenes】 - Wheels for railway models - Wheels for miniature cars - Other precision model components such as lines and spokes 【Benefits of Implementation】 - Improved work efficiency due to enhanced machinability - Higher product quality due to a beautiful silver appearance - Long-lasting maintenance of a beautiful appearance that is resistant to discoloration

In the jewelry industry, the diversification of designs has led to a demand for various metal materials. Particularly in the prototyping and small-scale production of decorative items, it is important to procure the necessary materials in the required quantities. Additionally, high workability is also sought after, and there may be demands for short delivery times. Our products are sold in cut lengths starting from a minimum of 3mm in phosphor bronze, nickel silver, and beryllium copper to meet our customers' needs. 【Usage Scenarios】 - Accessory production - Engraving - Jewelry design 【Benefits of Implementation】 - Ability to purchase only the necessary materials in required amounts - Short delivery times - Support with a rich inventory of various sizes

In the watch industry, the quality of springs that support precise movements greatly influences the reliability of products. In particular, durability, wear resistance, and accurate resilience are crucial factors that determine the performance of a watch. Materials such as phosphor bronze, nickel silver, and beryllium copper possess excellent properties that meet these demands. However, procuring the necessary materials in the required quantities can pose challenges during prototyping and repairs. Our products address these challenges. Additionally, nickel silver is sometimes used for watch cases and decorations, valued for its corrosion resistance and beautiful silver luster. 【Usage Scenarios】 - Spring components in watch manufacturing - Replacement of spring components in watch repair - Use as cases and decorations 【Benefits of Implementation】 - Stable supply of high-quality spring materials - Quick procurement of components - Support for prototyping and small-scale production

In the model railway industry, wheels, which influence the completeness of models, require precise processing and a beautiful appearance. The ease of machining, the beautiful silver appearance, and corrosion resistance that is not prone to discoloration are important. Free-cutting brass round bars (C7941) can meet these needs. 【Usage Scenarios】 - Wheels for model railways 【Benefits of Introduction】 - Increased work efficiency due to improved machinability - Enhanced product quality due to the beautiful silver appearance - Long-lasting maintenance of a beautiful appearance that is resistant to discoloration

In the camera industry, the durability and appearance of products are important. In particular, screws that are essential for camera assembly require high precision machining, a beautiful appearance, and resistance to corrosion. Free-cutting brass round bars (C7941) can meet these needs. 【Usage Scenarios】 - Camera screws - Tripod screws - Other camera-related parts 【Benefits of Implementation】 - Increased work efficiency due to improved machinability - Enhanced product quality due to a beautiful silver appearance - Long-lasting maintenance of a beautiful appearance that is resistant to discoloration

In the musical instrument parts industry, precise processing that affects tone and appearance is required. Particularly for parts that balance the aesthetics and functionality of instruments, ease of machining, a beautiful silver appearance, and corrosion resistance that is not prone to discoloration are important. Free-cutting brass round bars (C7941) can meet these needs. 【Usage Scenarios】 - Metal parts for instruments - Decorative parts - Other precision parts 【Benefits of Implementation】 - Increased work efficiency due to improved machinability - Enhanced product quality due to a beautiful silver appearance - Long-lasting maintenance of a beautiful appearance that is resistant to discoloration

In the jewelry industry, precise processing of decorative components and a beautiful appearance are required to highlight the beauty of the products. Especially for decorative components that are central to the design, ease of machining, a beautiful silver color, and corrosion resistance that is not prone to discoloration are important. Free-cutting brass round bars (C7941) can meet these needs. 【Usage Scenarios】 - Decorative components for accessories - Design parts for jewelry - Wire for decorative items 【Benefits of Introduction】 - Increased work efficiency due to improved machinability - Enhanced product quality due to a beautiful silver appearance - Long-lasting maintenance of a beautiful appearance that is resistant to discoloration

In the medical device industry, precise parts processing is required. Especially for components where durability and appearance are important, ease of machining, a beautiful silver appearance, and corrosion resistance that is not prone to discoloration are crucial. Free-cutting brass round bars (C7941) can meet these needs. 【Application Scenes】 - Parts for precision medical devices - Surgical instruments - Other precision components 【Effects of Introduction】 - Increased work efficiency due to improved machinability - Enhanced product quality due to a beautiful silver appearance - Long-lasting maintenance of a beautiful appearance that is resistant to discoloration

In the electronics industry, there is a trend towards miniaturization and high performance of terminals, leading to a demand for reliable materials. Particularly for terminals that are subjected to repeated use or high-temperature environments, materials with excellent wear resistance, conductivity, and heat resistance are essential. Inappropriate material selection can lead to contact failures and reduced product lifespan. The products we offer address these challenges and support high-quality terminals and manufacturing component materials. 【Application Scenarios】 - Manufacturing of electronic device terminals - Connector components - Switch components - Relay components 【Benefits of Implementation】 - Short delivery times (immediate delivery if in stock) - Manufacturing of high-quality terminals - Improved product reliability - Cost reduction - Product traceability (direct delivery from manufacturers) and provision of various environmental documentation.

In the marine propeller industry, materials that balance corrosion resistance and strength are in demand. It is particularly important to be resistant to corrosion and wear in seawater environments and to maintain performance over long periods. Inappropriate material selection can lead to early deterioration of the propeller and a decline in performance, potentially resulting in increased operating costs and safety issues. Our company offers the optimal materials for propeller manufacturing, including phosphor bronze, nickel silver, and beryllium copper, to meet our customers' needs. We also provide long products and can cut and sell them to the necessary length for shafts. 【Application Scenarios】 - Propeller manufacturing - Ship component (shaft) manufacturing - Marine equipment manufacturing 【Benefits of Implementation】 - Balancing corrosion resistance and strength - Ability to purchase only the necessary amount of materials - Short delivery times - Cost reduction

In the semiconductor manufacturing industry, the precision and durability of jigs significantly affect product quality. In particular, appropriate material selection is essential for jigs that require high-precision positioning or must withstand thermal loads. Low-quality materials can adversely impact the manufacturing process, potentially leading to reduced yield and product defects. Our products offer materials such as phosphor bronze, nickel silver, and beryllium copper, which possess high strength and wear resistance, contributing to the performance improvement of jigs in semiconductor manufacturing. 【Application Scenarios】 - High-precision positioning jigs - Jigs with high thermal loads - Jigs for microfabrication 【Benefits of Implementation】 - Delivery of the necessary products in the required quantities - Immediate availability of environmental materials and mill sheets (strength of direct delivery wholesalers) - Extended lifespan of jigs - Stabilization of the manufacturing process - Improvement of product quality

In the robotics industry, sensors and motor applications require high precision and durability. Particularly for components used in harsh environments, the selection of materials significantly affects performance. Phosphor bronze, nickel silver, and beryllium copper possess excellent machinability and mechanical properties, contributing to the miniaturization and high precision of parts. Our products meet customer needs by providing these materials in the required quantities and with short lead times. [Application Scenarios] - Sensor components for robotic arms - Position detection sensors - Stepping motor components - Stator components for ultrasonic motors - Contacts for environmental sensors, etc. [Benefits of Implementation] - Ability to purchase only the necessary materials in the required amounts - Short delivery times - Reduction in prototyping costs

Nickel silver is a silver-white alloy composed of copper, nickel, and zinc. Although it contains no silver at all, it is often referred to as "German silver" or "nickel silver" due to its beautiful luster. Nickel silver is primarily valued for its aesthetic appeal, good workability typical of copper alloys, high corrosion resistance, and the unique strength and springiness of the alloy. Generally, it is used in items such as tableware (cutlery), musical instruments, fishing gear, and model parts due to its color, workability, and corrosion resistance. Nickel silver is easier to work with than stainless steel and is less expensive than silver. It has the potential to be used more than stainless steel in decorative items (accessories) and models in the future. Additionally, in recent years, as the prices of precious metals like gold and silver have soared, nickel silver has been chosen as an alternative material for decorative items. When precision machining is required, there is also free-cutting nickel silver available, making it a frequently mentioned option as a substitute for silver. Although it is not visible, it is sometimes used in highly corrosive environments (such as underwater or coastal areas) and in factories as spring materials or structural components. Among copper alloys, it has excellent salt resistance and is relatively durable, making it suitable for use in places where contacts or plating are not applied.

Suddenly, in the past few years, the price of copper has more than doubled. Additionally, compared to a dozen years ago, the unit price of phosphor bronze, including manufacturer processing costs, has skyrocketed to nearly 2 to 3 times higher. Our company is a primary wholesaler (trading company) that stocks and sells rare non-ferrous metals such as phosphor bronze (especially round bars), beryllium copper (round bars and standard plates), and nickel silver (especially round bars). Phosphor bronze and beryllium copper are typically used in large quantities, while for prototypes or irregular one-off items, only a small amount may be used. Nickel silver has a wide range of applications, including fishing gear, models, musical instruments, and decorative items, making it a material that receives many inquiries from general customers. There are fewer manufacturers of these materials compared to brass, and the available stock in the market is limited. Additionally, lead times can take several months or more. Our company particularly stocks a diverse lineup of bar materials. We operate with the motto of "processing sales," where we cut to the necessary lengths for sale, and "same-day delivery" to specified locations. We want to minimize the risks associated with inventory due to rising copper prices, but we also want to secure materials appropriately. We are engaged in activities that respond to such demands. Our company offers proposals that leverage the strengths of "inventory" and "primary trading company."