エイワ List of Products and Services

The materials available for download on this page introduce case studies related to problem-solving in the prototype development of functional metal materials. ■ Small-scale prototyping with 30kg melting ■ Achieving required dimensions through outsourcing ■ One-stop support Customers who wish to utilize the above services are welcome to consult with us. 【Challenges faced by the customers in the case studies】 They want to shift from existing metal materials to high-performance and productivity-efficient metal materials. *For details on solutions and effects, please refer to the case study materials available for download in the catalog below, or feel free to contact us.

• Prototype Services
• Other metal materials

The materials that can be downloaded from this page introduce case studies related to solving issues associated with the quality improvement of cobalt alloys. Customers who wish to investigate potential causes based on information from the composition, mechanical properties, and internal structure of existing products are welcome to consult with us. 【Challenges faced by the customers in the case studies】 Existing metal materials often have defects due to internal and external flaws. *For details on solutions and effects, please refer to the case study materials available for download in the catalog below, or feel free to contact us.

• Other contract services
• alloy

"COBARION" is a cobalt-based alloy developed by Professor Akihiko Chiba at Tohoku University’s Institute of Metal Materials and manufactured by Aiwa Co., Ltd. It features a unique technology that suppresses nickel, which can cause metal allergies, achieving excellent strength, wear resistance, and corrosion resistance. This COBARION material is highly valuable as it is less likely to cause allergies and is gentle on the human body. It is suitable for artificial joints in the orthopedic field (such as hip joints, knee joints, elbow joints) and dental applications like orthodontic wires and denture bases. COBARION is alloyed through a vacuum melting method and is supplied to the market as round bars after undergoing various heat treatment processes. [Features] - Cobalt-chromium alloy with almost no nickel content - High ductility and excellent workability - High mechanical strength, wear resistance, and corrosion resistance - Alloyed through vacuum melting - Supplied to the market as round bars For more details, please contact us or download the catalog.

• Other metal materials

We apply the manufacturing technology of our own product, COBARION, to provide contract melting of special alloys. We offer integrated production from melting to forging and rolling, and we can also develop prototypes in small quantities. Vacuum melting starts from the formulation of raw materials. Leveraging this strength, we can produce "customer-customized alloys" and support various research and development through the prototyping of metal materials. 【Features】 ■ Capable of manufacturing "customer-customized metal materials" through metal melting ■ Skilled in controlling trace element composition ■ Ingots available in minimum weights of 6kg, 15kg, 30kg, 36kg, and 100kg ■ Can also accommodate subsequent plastic processing (homogenization heat treatment, hot forging, rolling, etc.) ■ We accept contract processing for hot forging and hot rolling as well. ■ We prioritize short delivery times. *For more details, please download the PDF or feel free to contact us.

• alloy

We apply the manufacturing technology of our product COBARION to provide contract melting of special alloys. We offer integrated production from melting to forging and rolling, and we can also develop prototypes in small quantities. Vacuum melting starts from the formulation of raw materials. Leveraging this strength, we can produce "customer-customized alloys" and support various research and development through the prototyping of metal materials. 【Features】 - Capable of manufacturing "customer-customized metal materials" for metal melting - Skilled in controlling trace element composition - Ingots available in minimum weights of 6kg, 15kg, 30kg, 36kg, and 100kg - Can also accommodate subsequent plastic processing (homogenization heat treatment, hot forging, rolling, etc.) - We accept contract processing for hot forging and hot rolling as well. - We prioritize short delivery times. *For more details, please download the PDF or feel free to contact us.

• alloy

We apply the manufacturing technology of our product COBARION to offer contract melting of special alloys. We provide a consistent production process from melting to forging and rolling, and we can also support small-scale prototype development. Vacuum melting starts from the formulation of raw materials. Leveraging this strength, we can produce "customer-customized alloys" and support various research and development efforts through metal material prototyping. 【Features】 ■ Capable of producing "customer-customized metal materials" through metal melting ■ Skilled in controlling trace element composition ■ Ingots available in minimum weights of 6kg, 15kg, 30kg, 36kg, and 100kg ■ Can also accommodate subsequent plastic processing (homogenization heat treatment, hot forging, rolling, etc.) ■ We accept contract processing for hot forging and hot rolling only. ■ We prioritize short delivery times. *For more details, please download the PDF or feel free to contact us.

• alloy

We apply the manufacturing technology of our product COBARION to offer contract melting of special alloys. We provide integrated production from melting to forging and rolling, and we are also capable of small-scale prototype development. Vacuum melting starts from the formulation of raw materials. Leveraging this strength, we can produce "customer-customized alloys" and support various research and development through metal material prototyping. 【Features】 ■ Capable of manufacturing "customer-customized metal materials" through metal melting ■ Skilled in controlling trace element composition ■ Ingots available in minimum weights of 6kg, 15kg, 30kg, 36kg, and 100kg ■ Can also accommodate subsequent plastic processing (homogenization heat treatment, hot forging, rolling, etc.) ■ We accept contract processing for hot forging and hot rolling as well. ■ We focus on short delivery times. *For more details, please download the PDF or feel free to contact us.

• alloy

We apply the manufacturing technology of our product COBARION to offer contract melting of special alloys. We provide integrated production not only for melting but also for forging and rolling, and we can also support small-scale prototype development. Vacuum melting starts from the formulation of raw materials. Leveraging this strength, we can produce "customer-customized alloys" and support various research and development through metal material prototyping. 【Features】 ■ We can manufacture "customer-customized metal materials" through metal melting. ■ We excel in controlling the composition of trace elements. ■ Our ingots are available in minimum weights of 6kg, 15kg, 30kg, 36kg, and 100kg. ■ We can also accommodate subsequent plastic processing (homogenization heat treatment, hot forging, rolling, etc.). ■ We accept contract processing for hot forging and hot rolling as well. ■ We prioritize short delivery times. 【Are you facing any of these issues...?】 ■ The metal materials you have been using are difficult to obtain because the existing manufacturer has stopped production. ■ There are no manufacturers willing to accommodate you since your annual usage is less than 100kg. ■ You want to create ingots with several different compositions and make plates to produce and evaluate test pieces. ■ You would like to have a size reduction of billets done in a short time.

• alloy

The high corrosion-resistant and wear-resistant cobalt alloy "COBARION-101" is an alloy that possesses high strength as well as excellent corrosion and wear resistance, specifically developed for manufacturing "fluororesin molding machine parts" in extremely harsh corrosive and abrasive environments. 【Features】 ■ High strength ■ High wear resistance ■ High corrosion resistance 【Compatible Resins】 Compatible with all types of fluororesin products, including PFA, ETFE, and PVDF. *For more details, please contact us or download the catalog.

• alloy

The high-strength heat-resistant cobalt alloy "COBARION-159" is a cobalt-nickel alloy manufactured with the aim of reducing strength degradation and distortion due to heat input during the joining of materials such as aluminum alloys. It is increasingly being adopted as a target for "friction stir welding tools." Accelerated tests conducted using actual equipment by Iwate University have confirmed that it has more than three times the durability of the MP-159 material currently used in the market. Our company, which specializes in small-lot production of special alloys, is working on the development of manufacturing methods for materials suitable for friction stir welding tools, with the cooperation of Tohoku University and Iwate University. 【Features】 ■ Wear resistance ■ Corrosion resistance *For more details, please contact us or download the catalog.

• alloy

The heat-resistant alloy COBARION TSE is a material that significantly improves high-temperature resistance above 600°C by finely dispersing the γ' gamma prime phase within its structure and introducing high-density dislocations into the matrix, thereby increasing strength at elevated temperatures. It also exhibits excellent mechanical properties in the temperature range from room temperature to 700°C, making it suitable for applications beyond heat-resistant springs. 【Features】 ■ Wear resistance ■ Corrosion resistance *For more details, please contact us or download the catalog.

• alloy

Copper alloys for resistors have the lowest resistance among precision resistive materials, with a temperature coefficient of resistance of ±20ppm in the range of 20 to 60°C. Other copper alloys can also be manufactured! ■CMS-1 ■CMN 【Applications】 Applications: Chip resistors, solid resistors, shunt resistors, etc. *For more details, please contact us or download the catalog.

• alloy

Our factory stocks over 20 types of raw materials and is committed to prompt responses. Additionally, we can customize ingredient combinations and adjustments based on customer needs. Researchers facing the following issues are encouraged to contact us: - Prototype of metal materials, so initially, a large quantity is not required. - Want to add trace components to confirm their effects. - A weight of a few kilograms per steel type is sufficient, and multiple types need to be tested. - Difficult to obtain in the market. - Arranging for forging and rolling is cumbersome, increases lead times, and handling becomes very challenging, so we would like to have a consistent prototype process. 【Features of the Vacuum Melting Furnace】 - The chamber is maintained at high vacuum using a vacuum pump, and through degassing refining, impurities in the raw materials are removed, allowing for the production of clean alloys. - Trace elements can be added, enabling the melting of various special alloys. - Ingots are available in 6Kg, 15Kg, 30Kg, 36Kg, and 100Kg. *For more details, please contact us or download the catalog.

• alloy

This is a scene where ingots are heated to over 1200°C in a furnace and undergo homogenization heat treatment, followed by free forging using a 600-ton hydraulic press.

• Steel

Ingot is brittle and unstable internally due to its cast structure. Therefore, the ingot is heated to over 1000°C and the internal structure is improved through hot forging. After that, by performing hot rolling at high temperatures, the microstructure is further refined through dynamic recrystallization. This refinement leads to improvements in material properties (strength, elongation, and drawability) and corrosion resistance, resulting in significant added value for metallic materials. Eiwa owns a 600t press, electric heating furnace, and hot rolling mill. We also accept contract processing for hot forging and hot rolling using this equipment. Please feel free to make inquiries even for small lots and a variety of products. *For more details, please contact us or download the catalog.

• alloy

【Main Equipment】 ■ Induction heating 30Kg vacuum melting furnace ■ Induction heating 100Kg vacuum melting furnace ■ High-temperature electric heating furnace for forging ■ Hydraulic 600-ton press machine ■ Reversible hot rolling mill, etc. 【Measuring Instruments】 ■ Tensile testing machine ■ X-ray fluorescence component analyzer ■ Inverted metal microscope ■ Rockwell hardness tester ■ Ultrasonic flaw detection testing machine, etc. *For more details, please contact us or download the catalog.

• alloy