Site Search

Types of Processing There are various types of processing, ranging widely from machining to heat treatment. Machining Lathe Machining (General-purpose lathes, NC lathes, etc.) Drilling (Machining Center processing, etc.) Forging (Free forging, roll forging, etc.) Casting (Sand casting, lost wax, etc.) Heat Treatment Quenching and Tempering Typical heat treatments for "hardening." After heating the steel to a high temperature, it is rapidly cooled by plunging it all at once into water or oil (quenching). Because it becomes more prone to cracking as it gets harder, it is heated again at a lower temperature (tempering) to regain toughness. Widely used for parts requiring both hardness and strength, such as blades and gears. Quenching: Around 800 - 900°C Tempering: 150 - 650°C (Depending on application) Annealing A heat treatment for "softening." After heating to a high temperature, it is slowly cooled over time inside a furnace. This relieves the strain and hardness accumulated inside the steel, making it easier to process (bend, cut, etc.). It is a treatment often used as "preparation" to condition the material. Heating temperature: Around 750 - 900°C Cooling method: Slow cooling inside a furnace Normalizing A heat treatment for "eliminating unevenness." After heating to a high temperature, it is removed from the furnace and slowly cooled in the air. It resets the variations in structure caused by processing such as forging and rolling, regulating the quality uniformly. It is easy to handle without requiring special equipment, and is widely utilized to stabilize the quality of structural steel materials. Heating temperature: Around 850 - 950°C Cooling method: Natural cooling in the atmosphere Solution Annealing (Solution Heat Treatment) A heat treatment for "restoring rust resistance." By heating to a high temperature, alloy components (such as chromium) contained in the iron are uniformly dissolved, followed by rapid cooling. It restores the corrosion resistance of stainless steel that was damaged by processing such as welding. Widely used for equipment in the food, medical, and chemical fields. Heating temperature: Around 1,010 - 1,150°C Cooling method: Rapid cooling by water or air Stainless Steel Round Pipes Inventory List *Currently, we do not hold inventory.

Types of Processing There are various types of processing, ranging widely from machining to heat treatment. Machining Lathe Machining (General-purpose lathes, NC lathes, etc.) Drilling (Machining Center processing, etc.) Forging (Free forging, roll forging, etc.) Casting (Sand casting, lost wax, etc.) Heat Treatment Quenching and Tempering Typical heat treatments for "hardening." After heating the steel to a high temperature, it is rapidly cooled by plunging it all at once into water or oil (quenching). Because it becomes more prone to cracking as it gets harder, it is heated again at a lower temperature (tempering) to regain toughness. Widely used for parts requiring both hardness and strength, such as blades and gears. Quenching: Around 800 - 900°C Tempering: 150 - 650°C (Depending on application) Annealing A heat treatment for "softening." After heating to a high temperature, it is slowly cooled over time inside a furnace. This relieves the strain and hardness accumulated inside the steel, making it easier to process (bend, cut, etc.). It is a treatment often used as "preparation" to condition the material. Heating temperature: Around 750 - 900°C Cooling method: Slow cooling inside a furnace Normalizing A heat treatment for "eliminating unevenness." After heating to a high temperature, it is removed from the furnace and slowly cooled in the air. It resets the variations in structure caused by processing such as forging and rolling, regulating the quality uniformly. It is easy to handle without requiring special equipment, and is widely utilized to stabilize the quality of structural steel materials. Heating temperature: Around 850 - 950°C Cooling method: Natural cooling in the atmosphere Solution Annealing (Solution Heat Treatment) A heat treatment for "restoring rust resistance." By heating to a high temperature, alloy components (such as chromium) contained in the iron are uniformly dissolved, followed by rapid cooling. It restores the corrosion resistance of stainless steel that was damaged by processing such as welding. Widely used for equipment in the food, medical, and chemical fields. Heating temperature: Around 1,010 - 1,150°C Cooling method: Rapid cooling by water or air Stainless Steel Shapes Inventory List *Currently, we do not hold inventory.

Types of Processing There are various types of processing, ranging widely from machining to heat treatment. Machining Lathe Machining (General-purpose lathes, NC lathes, etc.) Drilling (Machining Center processing, etc.) Forging (Free forging, roll forging, etc.) Casting (Sand casting, lost wax, etc.) Heat Treatment Quenching and Tempering Typical heat treatments for "hardening." After heating the steel to a high temperature, it is rapidly cooled by plunging it all at once into water or oil (quenching). Because it becomes more prone to cracking as it gets harder, it is heated again at a lower temperature (tempering) to regain toughness. Widely used for parts requiring both hardness and strength, such as blades and gears. Quenching: Around 800 - 900°C Tempering: 150 - 650°C (Depending on application) Annealing A heat treatment for "softening." After heating to a high temperature, it is slowly cooled over time inside a furnace. This relieves the strain and hardness accumulated inside the steel, making it easier to process (bend, cut, etc.). It is a treatment often used as "preparation" to condition the material. Heating temperature: Around 750 - 900°C Cooling method: Slow cooling inside a furnace Normalizing A heat treatment for "eliminating unevenness." After heating to a high temperature, it is removed from the furnace and slowly cooled in the air. It resets the variations in structure caused by processing such as forging and rolling, regulating the quality uniformly. It is easy to handle without requiring special equipment, and is widely utilized to stabilize the quality of structural steel materials. Heating temperature: Around 850 - 950°C Cooling method: Natural cooling in the atmosphere Solution Annealing (Solution Heat Treatment) A heat treatment for "restoring rust resistance." By heating to a high temperature, alloy components (such as chromium) contained in the iron are uniformly dissolved, followed by rapid cooling. It restores the corrosion resistance of stainless steel that was damaged by processing such as welding. Widely used for equipment in the food, medical, and chemical fields. Heating temperature: Around 1,010 - 1,150°C Cooling method: Rapid cooling by water or air  Stainless Steel Plates Inventory List *Currently, we do not hold inventory.

Types of Processing There are various types of processing, ranging widely from machining to heat treatment. Machining Lathe Machining (General-purpose lathes, NC lathes, etc.) Drilling (Machining Center processing, etc.) Forging (Free forging, roll forging, etc.) Casting (Sand casting, lost wax, etc.) Heat Treatment Quenching and Tempering Typical heat treatments for "hardening." After heating the steel to a high temperature, it is rapidly cooled by plunging it all at once into water or oil (quenching). Because it becomes more prone to cracking as it gets harder, it is heated again at a lower temperature (tempering) to regain toughness. Widely used for parts requiring both hardness and strength, such as blades and gears. Quenching: Around 800 - 900°C Tempering: 150 - 650°C (Depending on application) Annealing A heat treatment for "softening." After heating to a high temperature, it is slowly cooled over time inside a furnace. This relieves the strain and hardness accumulated inside the steel, making it easier to process (bend, cut, etc.). It is a treatment often used as "preparation" to condition the material. Heating temperature: Around 750 - 900°C Cooling method: Slow cooling inside a furnace Normalizing A heat treatment for "eliminating unevenness." After heating to a high temperature, it is removed from the furnace and slowly cooled in the air. It resets the variations in structure caused by processing such as forging and rolling, regulating the quality uniformly. It is easy to handle without requiring special equipment, and is widely utilized to stabilize the quality of structural steel materials. Heating temperature: Around 850 - 950°C Cooling method: Natural cooling in the atmosphere Solution Annealing (Solution Heat Treatment) A heat treatment for "restoring rust resistance." By heating to a high temperature, alloy components (such as chromium) contained in the iron are uniformly dissolved, followed by rapid cooling. It restores the corrosion resistance of stainless steel that was damaged by processing such as welding. Widely used for equipment in the food, medical, and chemical fields. Heating temperature: Around 1,010 - 1,150°C Cooling method: Rapid cooling by water or air Stainless Steel Square Bars Inventory List *Currently, we do not hold inventory.

Types of Processing There are various types of processing, ranging widely from machining to heat treatment. Machining Lathe Machining (General-purpose lathes, NC lathes, etc.) Drilling (Machining Center processing, etc.) Forging (Free forging, roll forging, etc.) Casting (Sand casting, lost wax, etc.) Heat Treatment Quenching and Tempering Typical heat treatments for "hardening." After heating the steel to a high temperature, it is rapidly cooled by plunging it all at once into water or oil (quenching). Because it becomes more prone to cracking as it gets harder, it is heated again at a lower temperature (tempering) to regain toughness. Widely used for parts requiring both hardness and strength, such as blades and gears. Quenching: Around 800 - 900°C Tempering: 150 - 650°C (Depending on application) Annealing A heat treatment for "softening." After heating to a high temperature, it is slowly cooled over time inside a furnace. This relieves the strain and hardness accumulated inside the steel, making it easier to process (bend, cut, etc.). It is a treatment often used as "preparation" to condition the material. Heating temperature: Around 750 - 900°C Cooling method: Slow cooling inside a furnace Normalizing A heat treatment for "eliminating unevenness." After heating to a high temperature, it is removed from the furnace and slowly cooled in the air. It resets the variations in structure caused by processing such as forging and rolling, regulating the quality uniformly. It is easy to handle without requiring special equipment, and is widely utilized to stabilize the quality of structural steel materials. Heating temperature: Around 850 - 950°C Cooling method: Natural cooling in the atmosphere Solution Annealing (Solution Heat Treatment) A heat treatment for "restoring rust resistance." By heating to a high temperature, alloy components (such as chromium) contained in the iron are uniformly dissolved, followed by rapid cooling. It restores the corrosion resistance of stainless steel that was damaged by processing such as welding. Widely used for equipment in the food, medical, and chemical fields. Heating temperature: Around 1,010 - 1,150°C Cooling method: Rapid cooling by water or air Stainless Steel Hexagonal Bars Inventory List *Currently, we do not hold inventory.

Types of Processing There are various types of processing, ranging widely from machining to heat treatment. Machining Lathe Machining (General-purpose lathes, NC lathes, etc.) Drilling (Machining Center processing, etc.) Forging (Free forging, roll forging, etc.) Casting (Sand casting, lost wax, etc.) Heat Treatment Quenching and Tempering Typical heat treatments for "hardening." After heating the steel to a high temperature, it is rapidly cooled by plunging it all at once into water or oil (quenching). Because it becomes more prone to cracking as it gets harder, it is heated again at a lower temperature (tempering) to regain toughness. Widely used for parts requiring both hardness and strength, such as blades and gears. Quenching: Around 800 - 900°C Tempering: 150 - 650°C (Depending on application) Annealing A heat treatment for "softening." After heating to a high temperature, it is slowly cooled over time inside a furnace. This relieves the strain and hardness accumulated inside the steel, making it easier to process (bend, cut, etc.). It is a treatment often used as "preparation" to condition the material. Heating temperature: Around 750 - 900°C Cooling method: Slow cooling inside a furnace Normalizing A heat treatment for "eliminating unevenness." After heating to a high temperature, it is removed from the furnace and slowly cooled in the air. It resets the variations in structure caused by processing such as forging and rolling, regulating the quality uniformly. It is easy to handle without requiring special equipment, and is widely utilized to stabilize the quality of structural steel materials. Heating temperature: Around 850 - 950°C Cooling method: Natural cooling in the atmosphere Solution Annealing (Solution Heat Treatment) A heat treatment for "restoring rust resistance." By heating to a high temperature, alloy components (such as chromium) contained in the iron are uniformly dissolved, followed by rapid cooling. It restores the corrosion resistance of stainless steel that was damaged by processing such as welding. Widely used for equipment in the food, medical, and chemical fields. Heating temperature: Around 1,010 - 1,150°C Cooling method: Rapid cooling by water or air Stainless Steel Round Bar Inventory List SUS304 Peeled Round Bar Outer Diameter (mm)（10〜75） Outer Diameter (mm)（80〜） SUS304 Cold Drawn Round Bar (Polished) h9 Outer Diameter (mm)（10〜75） Outer Diameter (mm)（80〜）

Types of Processing There are various types of processing, ranging widely from machining to heat treatment. Machining Lathe Machining (General-purpose lathes, NC lathes, etc.) Drilling (Machining Center processing, etc.) Forging (Free forging, roll forging, etc.) Casting (Sand casting, lost wax, etc.) Heat Treatment Quenching and Tempering Typical heat treatments for "hardening." After heating the steel to a high temperature, it is rapidly cooled by plunging it all at once into water or oil (quenching). Because it becomes more prone to cracking as it gets harder, it is heated again at a lower temperature (tempering) to regain toughness. Widely used for parts requiring both hardness and strength, such as blades and gears. Quenching: Around 800 - 900°C Tempering: 150 - 650°C (Depending on application) Annealing A heat treatment for "softening." After heating to a high temperature, it is slowly cooled over time inside a furnace. This relieves the strain and hardness accumulated inside the steel, making it easier to process (bend, cut, etc.). It is a treatment often used as "preparation" to condition the material. Heating temperature: Around 750 - 900°C Cooling method: Slow cooling inside a furnace Normalizing A heat treatment for "eliminating unevenness." After heating to a high temperature, it is removed from the furnace and slowly cooled in the air. It resets the variations in structure caused by processing such as forging and rolling, regulating the quality uniformly. It is easy to handle without requiring special equipment, and is widely utilized to stabilize the quality of structural steel materials. Heating temperature: Around 850 - 950°C Cooling method: Natural cooling in the atmosphere Solution Annealing (Solution Heat Treatment) A heat treatment for "restoring rust resistance." By heating to a high temperature, alloy components (such as chromium) contained in the iron are uniformly dissolved, followed by rapid cooling. It restores the corrosion resistance of stainless steel that was damaged by processing such as welding. Widely used for equipment in the food, medical, and chemical fields. Heating temperature: Around 1,010 - 1,150°C Cooling method: Rapid cooling by water or air Stainless Steel Tubes Inventory List *Currently, we do not hold inventory.

Architecture & Interior Design The Optimal Stainless Steel for Architecture & Interior Design What is demanded in architecture is not only beauty but also "strength" to be used for a long time. Stainless steel exhibits stable performance even in outdoor environments due to its properties of resisting rust and deterioration.In addition to high reliability as exterior/exterior members, its refined texture elevates the value of the space. We expand the possibilities of architecture with reliable quality and flexible processing support. Proposals by Application EquipmentApplicationCharacteristicsExterior / Structural MembersExterior wall panels / Roofing materials / Handrails & fences / Bridge membersStrong against rain and wind, resistant to rust for long periodsKeeps maintenance costs downInterior / Design MaterialsWall panels / Elevator interiors / Monuments & decorative materials / Store fixtures (counters, shelves, etc.)Diverse finishes available such as hairline and mirror polishCreates a sense of luxury and cleanlinessEquipment / Functional MembersDoor hardware (handles, hinges) / Kitchen equipment (sinks, countertops) / Piping & ductsResistant to water and moisture, highly sanitaryAlso excellent in heat and chemical resistance Mainly Used Materials and Characteristics SUS304　The most general stainless steel with a good balance of corrosion resistance, workability, and cost; widely used for both interiors and exteriors. SUS316 / SUS316L　Contains molybdenum, highly corrosion-resistant; ideal for coastal areas, exteriors, and wet areas. SUS430　Ferritic series, low cost; used for indoor applications and decorative members. SUS301 / SUS304 series (Spring applications)　Excellent strength and elasticity; used for fitting parts and structural auxiliary materials. Reasons Why Stainless Steel is Chosen Rust-resistant and long-lastingHighly decorative (Design quality)Easy to clean and sanitaryRecyclable with low environmental impact Food, Medical & Sanitary Fields The Optimal Stainless Steel for Food, Medical & Sanitary Fields Combining high corrosion resistance and cleanliness, stainless steel is an indispensable material in environments requiring sanitation management, such as food factories and medical sites. At Matsui Kozai, we consistently handle everything from optimal material selection according to the application to processing and delivery. Common ChallengesIn the food, medical, and sanitary fields, there are challenges such as the following: Want to prevent the risk of foreign matter contamination due to rust or corrosion. Want to use materials that can withstand washing and sterilization. Want to meet sanitary standards (cleanability, non-contamination). Want to choose materials highly resistant to chemicals and moisture. These challenges can be solved with stainless steel. EquipmentApplicationCharacteristicsRecommended MaterialsFood Factories / Kitchen EquipmentTanks / Piping / Workbenches / Conveyor membersRust-resistant, reducing foreign matter contamination risksStrong against washing and sterilizationComplies with food sanitation standardsSUS304 / SUS316Medical & Pharmaceutical EquipmentSurgical instruments / Medical device parts / Clean equipmentHigh corrosion and chemical resistanceEasy to suppress bacterial growthSuitable for environments requiring high cleanlinessSUS316 / SUS316LClean Environments / Sanitary EquipmentCleanroom members / Piping / Exhaust equipmentSuppresses the adhesion of dust and pollutantsHigh cleanability due to surface finishesMaintains quality even with long-term useSUS304 / SUS316L Materials Used Automobiles & Transportation Infrastructure The Optimal Stainless Steel for Automobiles & Infrastructure Combining high durability, corrosion resistance, and strength, stainless steel is adopted in a wide range of fields from automotive parts to social infrastructure. At Matsui Kozai, we consistently handle everything from optimal material proposals according to the usage environment and application to processing and delivery. Common ChallengesIn the automobile and infrastructure fields, there are challenges such as the following: Want to prevent rust and corrosion in outdoor environments. Want to balance strength and durability. Want to achieve weight reduction and high strength. Want to choose materials that can withstand long-term use. Proposals by Application EquipmentApplicationCharacteristicsRecommended MaterialsAutomotive-Related PartsMufflers / Exhaust system parts / Bolts & nuts / Spring parts / Sensor parts / Structural auxiliary materialsStrong in high-temperature environments (Heat resistance)Strength to withstand vibration and stressStrong against corrosion, long-lastingSUS304 / SUS301 / SUS430Social Infrastructure (Bridges, Civil Engineering)Bridge members / Handrails / Protective fences / Bolts & nuts / AnchorsHigh corrosion resistance even in outdoor environmentsReduction of maintenance frequencyCost benefits through long-term useSUS304 / SUS316Railway & Transportation InfrastructureRolling stock members / Interior parts / Station equipment / Platform doorsHigh durability and safetyMaintains aesthetics (rust-resistant)Maintains performance even with long-term useSUS304 / SUS301Energy & Facility InfrastructurePower generation equipment / Piping / Tanks / Water supply and sewage facilitiesCorrosion resistance against water and chemicalsStable performance even in harsh environmentsLong-term reliabilitySUS316 / SUS316L Materials Used Plants, Energy & Chemical Equipment Stainless Steel Used in the Plants & Energy Fields In the plant and energy fields, materials that can withstand harsh conditions such as high temperatures, high pressures, and corrosive environments are required. Stainless steel has excellent corrosion resistance, heat resistance, and strength, making it a vital material supporting stable operations. Proposals by Application EquipmentApplicationCharacteristicsPower Generation Plants (Thermal, Nuclear, Renewable Energy)Boiler piping / Steam lines / Heat exchangers / Turbine peripheral membersHard to deform even in high-temperature and high-pressure environments, can be used for long periodsPetroleum & Chemical PlantsPiping (fluid transportation) / Reaction vessels & tanks / Valves & fittingsPrevents corrosion by chemicals and gases, ensuring safetyHydrogen & Energy InfrastructureHydrogen station equipment / High-pressure gas piping / Fuel cell-related membersHigh strength and high durability to withstand hydrogen embrittlement and high-pressure environmentsRenewable Energy EquipmentSolar panel mounting members / Wind power generation equipment parts / Biomass plant equipmentRust-resistant even in outdoor environments, reducing maintenance costs Main Materials Used SUS304 / SUS304L　Highly versatile, widely used for piping and tanks. SUS316 / SUS316L　High corrosion resistance, strong in chemical and seawater environments. SUS310S / SUS309S　 Strong in high-temperature environments, used for boilers and furnace-related parts. SUS329J4L (Duplex Series)　High strength + corrosion resistance, applied to marine and plant piping. SUS630　Used for valves and machine parts where high strength is required. Reasons Why Stainless Steel is Chosen Rust-resistant, reducing the risk of accidents due to corrosion.Maintains performance even under high temperature and high pressure.Long-lasting, reducing the lifecycle cost of equipment.Stable supply is possible, supporting design standardization. Home Appliances & Daily Necessities Stainless Steel Used in Home Appliances & Daily Necessities In the fields of home appliances and daily necessities, visual beauty, cleanliness, and durability are required. Due to its properties of being "rust-resistant, stain-resistant, and strong," stainless steel is widely adopted as a material supporting everyday life. Main Applications EquipmentApplicationCharacteristicsKitchen Appliances & Cooking UtensilsRefrigerator interior members / Microwave oven interiors / Rice cooker inner pots (exterior members) / Pots, pans, bowlsSafe even when in contact with food; highly sanitary and heat-resistantPlumbing / Wet Area ProductsSinks / Faucets / Drainage partsHighly resistant to water, prevents rust and corrosion, can be used for a long timeHome Appliance Exteriors / Interior AppliancesExterior panels of refrigerators and washing machines / Oven and toaster exteriors / Design members for high-end appliancesRealizes a luxurious appearance through hairline and mirror finishesDaily Necessities / Household GoodsCutlery (spoons, forks) / Tumblers, bottles / Clothes drying and storage itemsStrong against scratches and impacts, durable enough to withstand repeated use Main Materials Used SUS304　The most general. Widely used for tableware, kitchen goods, and home appliance members. SUS430　For cost-saving applications (exterior panels, inside home appliances). SUS316　High-end bottles, canteens, etc., where corrosion resistance is required. SUS303　Good machinability, used for precision parts and small components. Reasons Why Stainless Steel is Chosen Rust-resistant, can be used cleanly for a long time.Resistant to dirt and easy to care for.High strength; strong even when thin.Beautiful appearance with high design quality.