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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

Equipment	Application	Characteristics
Exterior / Structural Members	Exterior wall panels / Roofing materials / Handrails & fences / Bridge members	Strong against rain and wind, resistant to rust for long periods Keeps maintenance costs down
Interior / Design Materials	Wall panels / Elevator interiors / Monuments & decorative materials / Store fixtures (counters, shelves, etc.)	Diverse finishes available such as hairline and mirror polish Creates a sense of luxury and cleanliness
Equipment / Functional Members	Door hardware (handles, hinges) / Kitchen equipment (sinks, countertops) / Piping & ducts	Resistant to water and moisture, highly sanitary Also excellent in heat and chemical resistance

Mainly Used Materials and Characteristics

SUS304

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-lasting
Highly decorative (Design quality)
Easy to clean and sanitary
Recyclable 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 Challenges
In 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.

Equipment	Application	Characteristics	Recommended Materials
Food Factories / Kitchen Equipment	Tanks / Piping / Workbenches / Conveyor members	Rust-resistant, reducing foreign matter contamination risks Strong against washing and sterilization Complies with food sanitation standards	SUS304 / SUS316
Medical & Pharmaceutical Equipment	Surgical instruments / Medical device parts / Clean equipment	High corrosion and chemical resistance Easy to suppress bacterial growth Suitable for environments requiring high cleanliness	SUS316 / SUS316L
Clean Environments / Sanitary Equipment	Cleanroom members / Piping / Exhaust equipment	Suppresses the adhesion of dust and pollutants High cleanability due to surface finishes Maintains quality even with long-term use	SUS304 / SUS316L

Materials Used

SUS304

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 Challenges
In 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

Equipment	Application	Characteristics	Recommended Materials
Automotive-Related Parts	Mufflers / Exhaust system parts / Bolts & nuts / Spring parts / Sensor parts / Structural auxiliary materials	Strong in high-temperature environments (Heat resistance) Strength to withstand vibration and stress Strong against corrosion, long-lasting	SUS304 / SUS301 / SUS430
Social Infrastructure (Bridges, Civil Engineering)	Bridge members / Handrails / Protective fences / Bolts & nuts / Anchors	High corrosion resistance even in outdoor environments Reduction of maintenance frequency Cost benefits through long-term use	SUS304 / SUS316
Railway & Transportation Infrastructure	Rolling stock members / Interior parts / Station equipment / Platform doors	High durability and safety Maintains aesthetics (rust-resistant) Maintains performance even with long-term use	SUS304 / SUS301
Energy & Facility Infrastructure	Power generation equipment / Piping / Tanks / Water supply and sewage facilities	Corrosion resistance against water and chemicals Stable performance even in harsh environments Long-term reliability	SUS316 / SUS316L

Materials Used

SUS304

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

Equipment	Application	Characteristics
Power Generation Plants (Thermal, Nuclear, Renewable Energy)	Boiler piping / Steam lines / Heat exchangers / Turbine peripheral members	Hard to deform even in high-temperature and high-pressure environments, can be used for long periods
Petroleum & Chemical Plants	Piping (fluid transportation) / Reaction vessels & tanks / Valves & fittings	Prevents corrosion by chemicals and gases, ensuring safety
Hydrogen & Energy Infrastructure	Hydrogen station equipment / High-pressure gas piping / Fuel cell-related members	High strength and high durability to withstand hydrogen embrittlement and high-pressure environments
Renewable Energy Equipment	Solar panel mounting members / Wind power generation equipment parts / Biomass plant equipment	Rust-resistant even in outdoor environments, reducing maintenance costs

Main Materials Used

SUS304

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

Equipment	Application	Characteristics
Kitchen Appliances & Cooking Utensils	Refrigerator interior members / Microwave oven interiors / Rice cooker inner pots (exterior members) / Pots, pans, bowls	Safe even when in contact with food; highly sanitary and heat-resistant
Plumbing / Wet Area Products	Sinks / Faucets / Drainage parts	Highly resistant to water, prevents rust and corrosion, can be used for a long time
Home Appliance Exteriors / Interior Appliances	Exterior panels of refrigerators and washing machines / Oven and toaster exteriors / Design members for high-end appliances	Realizes a luxurious appearance through hairline and mirror finishes
Daily Necessities / Household Goods	Cutlery (spoons, forks) / Tumblers, bottles / Clothes drying and storage items	Strong against scratches and impacts, durable enough to withstand repeated use

Main Materials Used

SUS304

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.