大和特殊鋼 List of Products and Services

Aloy C22 (UNS N06022, NW6022) is a nickel alloy with excellent corrosion resistance. It exhibits outstanding resistance to pitting, crevice corrosion, and stress corrosion cracking in both oxidizing and non-oxidizing environments, and is widely used as a material in harsh environments such as flue gas desulfurization systems, papermaking, and waste treatment. Welding can be performed using standard welding methods similar to those for stainless steel, and post-weld heat treatment is not required. [Features] - Excellent resistance to pitting, crevice corrosion, and stress corrosion cracking - Widely used as a material in harsh environments - Standard welding methods applicable, similar to stainless steel - Solution heat treatment temperature is 1150-1170°C, and rapid cooling is required after heat treatment *For more details, please refer to the related link page or feel free to contact us.

"Nickel 201 (NW201, UNS N02201)" is a high corrosion-resistant pure nickel that exhibits excellent resistance to caustic soda and chlorine gas. It is particularly used as a material for caustic soda production equipment using the diaphragm electrolysis method. Welding can be performed using TIG, MIG, coated arc welding, and resistance welding. For TIG and MIG welding rods, YNi-1 is recommended. 【Features】 ■ Excellent corrosion resistance to caustic soda and chlorine gas ■ Pure nickel has low work hardening, making it suitable for severe cold working such as spinning and coining ■ Welding can be performed using TIG, MIG, coated arc welding, and resistance welding ■ Heat treatment should be done at 760 to 1050°C, followed by rapid cooling *For more details, please refer to the PDF document or feel free to contact us.

"Aloy 625 (NCF625, UNS N06625)" is a nickel-based alloy that is solid-solution strengthened by adding molybdenum and niobium to nickel-chromium. Due to its excellent corrosion resistance and heat resistance, it is used as a material in chemical plants, waste incineration plants, and more. Welding can be performed using TIG, MIG, and shielded arc welding, similar to standard austenitic stainless steels, and welding materials should use nickel-based welding materials. 【Features】 ■ Strength at high temperatures is significantly higher than that of SUS304 ■ Cold workability is almost equivalent to standard austenitic stainless steels such as SUS304 and SUS316 ■ Sensitivity to weld solidification cracking is higher than that of SUS304 ■ Heat treatment: Annealing at 871°C with rapid cooling / Solution heat treatment at 1093°C with rapid cooling ■ Pickling uses a mixed acid of nitric acid and hydrofluoric acid *For more details, please refer to the PDF document or feel free to contact us.

"Aloy 800H/800T (UNS N08810/N08811)" is a high-nickel heat-resistant steel that possesses excellent strength, corrosion resistance, and oxidation resistance at high temperatures, characterized by high structural stability at elevated temperatures. Furthermore, it is an alloy with high creep strength achieved through grain size control via high-temperature heat treatment and control of C, Ti, and Al content. It also exhibits excellent high-temperature strength and does not suffer from embrittlement due to sigma phase precipitation during high-temperature use, making it widely used for heat-resistant applications. [Features] - Workability at hot and cold temperatures is almost the same as austenitic stainless steel. - Welding is possible using TIG, MIG, and coated arc welding. - Heat treatment: solution heat treatment at 1100–1170°C with rapid cooling / solution heat treatment temperature above 1121°C (UNS N08810). - Excellent corrosion resistance in oxidative corrosive environments such as nitric acid and in molten salts like sodium chloride. - Stress corrosion cracking sensitivity is superior compared to standard austenitic stainless steel. *For more details, please refer to the PDF document or feel free to contact us.*

Aloy C276 (NW0276, UNS N10276) is a nickel-based alloy that exhibits excellent corrosion resistance in both oxidizing and reducing environments. By reducing carbon and silicon, it suppresses the precipitation in the heat-affected zone and enhances corrosion resistance, making it widely used in materials for harsh environments such as chemical plants. Welding can be performed using standard welding methods similar to those for stainless steel, and welding materials should use nickel-based welding materials. 【Features】 ■ Strength at high temperatures is significantly higher than that of SUS 304 ■ Cold workability is almost equivalent to standard austenitic stainless steels such as SUS 304 and 316 ■ Solution heat treatment temperature is 1150–1170°C, and rapid cooling is required after heat treatment ■ Welding can be performed using standard welding methods similar to those for stainless steel ■ Pickling uses a mixed acid of nitric and hydrofluoric acid *For more details, please refer to the PDF document or feel free to contact us.

"Aloy 600 (NCF600, UNS N06600)" is a high-grade heat-resistant alloy that contains 14-17% chromium and exhibits exceptional oxidation resistance at high temperatures. It also has a wide range of applications as a corrosion-resistant alloy with excellent resistance to various acids and alkalis. The heating temperature is 1150-1180°C, the hot working temperature is 1000-1180°C, and light processing is possible up to 850°C; however, cracking may occur in the temperature range of 650-850°C. Cold workability is easier than that of austenitic stainless steel and is similar to Monel. [Features] ■ Hot working is relatively easy ■ Welding can be performed using TIG, MIG, and covered arc welding, similar to standard austenitic stainless steel ■ Cutting is possible with high-speed steel tools ■ Excellent resistance to nitrogen, hydrogen, and carburizing *For more details, please refer to the PDF document or feel free to contact us.

"Aloy 400 (UNS N04400)" is an alloy that combines the noble properties of Cu and the passivation properties of Ni, offering excellent corrosion resistance. It is used in seawater desalination plants, heat exchangers, and marine construction coatings. Welding can be performed using TIG, MIG, coated arc welding, and resistance welding. For MIG welding, YNiCu-7 is recommended. 【Features】 ■ At room temperature, it is softer than SUS 304, making bending and processing easy. ■ Welding can be done using TIG, MIG, coated arc welding, and resistance welding. ■ Annealing is performed at 700–900°C, and rapid air cooling is desirable. *For more details, please refer to the PDF document or feel free to contact us.

Our company sells a variety of metal materials, including general stainless steel, high alloys with excellent durability, titanium, and rare metals. We can deliver in forms such as round bars, steel plates, seamless pipes, and welded pipes, and we are also flexible in responding to secondary processing such as high-precision and high-quality drilling, bending, and beveling using high-performance laser processing machines. Through the provision of materials that cover features such as high strength and high corrosion resistance, we contribute to weight reduction, extended lifespan, and cost reduction. [About Us] ■ We possess specialized knowledge and know-how accumulated over more than 50 years since our founding. ■ We consistently prioritize quality and provide materials suitable for our customers. ■ Our warehouse has a total inventory capacity of 26,000 tons, maintaining a rich stock. ■ We have established a system for immediate delivery and can accommodate small lot orders. *You can view a catalog introducing our inventory of duplex stainless steel and nickel alloys from the "PDF Download."

We have replaced one of the few 12kW fiber laser machines in Japan. The cutting speed is approximately three times faster compared to the conventional 7kW CO2 laser machines, allowing for speedy responses and high-quality, flexible precision cutting for materials up to 35mm thick. The conventional 12kW gantry fiber laser can now also cut up to 35mm thick and is capable of handling wide and long cuts with dimensions of 3400mm in width and 19000mm in length. NC lathe processing machine (drilling compatible) Leveraging a wide range of stock, we provide a consistent service from material to cutting to drilling for not only general stainless steel but also duplex stainless steel, delivering to customers without any downtime. *Videos of the lathe processing machine are available on a separate product information page. Please take a look.

NC lathe machining (drilling compatible) Leveraging a wide range of inventory, we provide a consistent service from material cutting to drilling processing, not only for general stainless steel but also for duplex stainless steel, delivering to customers without any downtime.

Duplex stainless steel is a type of stainless steel that combines austenitic and ferritic structures. By leveraging its high strength and high corrosion resistance, it allows for value engineering (VE) from general-purpose stainless steel and other materials, increasing options. We have a rich inventory of duplex stainless steel, ranging from lean duplex to super duplex. 【Characteristics】 ■ High strength: Weight reduction ■ High corrosion resistance: Resistance to stress corrosion cracking and pitting corrosion ■ Low thermal expansion: Reduced maintenance burden and extended lifespan ■ Resource-saving: Reduction of rare metals With a low nickel content, it is less susceptible to fluctuations in material prices, contributing to sustainable consumption and production patterns, which aligns with the SDGs. *For more details, please refer to the PDF document or feel free to contact us.

Our company sells a variety of metal materials, including general stainless steel, high alloys with excellent durability, titanium, and rare metals. Among these, high alloys are extremely superior materials in terms of high strength and high corrosion resistance, and their use in harsh environments where general stainless steel and other materials cannot withstand is increasing. We have a wide range of products in stock. Below is the list of our lineup. 【Product Lineup】 ■ Alloy C276 (NW0276, UNS N10276) ■ Alloy C22 (NW6022, UNS N06022) ■ Nickel 201 (NW201, UNS N02201) ■ Alloy 600 (NCF600, UNS N06600) ■ Alloy 400 (UNS N04400) ■ Alloy 800H/800T (UNS N08810/N08811) ■ Alloy 625 (NCF625, UNS N06625) *For more details, please feel free to contact us.