What is stainless steel and why is it corrosion resistant?

Stainless steel is an essential material in sectors such as the food, medical, chemical, and architectural industries. Its popularity is not only due to its appearance, but also to its amazing corrosion resistance, making it one of the most reliable and durable materials on the market.

What makes it “stainless”?

The key is in its chemical composition. Unlike carbon steel, stainless steel contains chromium (minimum 10.5%), an element that generates a passive layer of chromium oxide on the surface. This film acts as a protective shield that prevents oxidation, and most impressively: regenerates automatically upon contact with oxygen if damaged.

What other elements strengthen it?

In addition to chrome, elements such as nickel, molybdenum, manganese, phosphorus and sulfur to improve their performance. This gives rise to different types of stainless steel, each adapted to specific uses.

Most common types of stainless steel in the industry

AISI 304 – The most versatile

El AISI 304 stainless steel It is the most widely used in the world. It contains 18–20% chromium and 8–10.5% nickel. It offers excellent resistance to oxidation, good weldability and ease of forming. Ideal for use in kitchens, hospitals, architecture, and the chemical industry.

AISI 316L – The best against extreme environments

With 2–3 % of molybdenum’s most emblematic landmarks, the 316L steel excels in aggressive environments such as marine areas or chemical facilities. Its low carbon content reduces the risk of intergranular corrosion, making it perfect for the pharmaceutical, medical, and oil & gas industries.

AISI 303 – High machinability

Designed for ease of machining, this type of steel contains sulfur and phosphorus. AISI 303 steel It is ideal for the manufacture of screws, bushings, and precision parts. Although its corrosion resistance is lower than AISI 304, its productivity in industrial processes is higher.

AISI 416 – Hardness and resistance

El AISI 416 steel It is a maraging steel with excellent heat-treatment hardening capacity. It is ideal for manufacturing components subjected to mechanical stress, such as axles and machine parts. It offers good corrosion resistance in moderate environments.

Advantages of choosing stainless steel

Investing in stainless steel means:

• Lower maintenance costs.
• Greater durability against aggressive environments.
• Excellent aesthetics for visible applications.
• High recyclability, making it a sustainable material.

Where to buy high-quality stainless steel?

En Serviacero EspecialesWe are specialists in stainless steel solutions. We offer:

• Large stock of AISI 304, 316L, 303 and 416 stainless steels.
• Specialized technical advice.
• On-time deliveries nationwide.

🔧 Whether you manufacture industrial equipment, medical furniture, or architectural structures, we have the ideal steel for you.

Contact us today for our site and discover how we can help you achieve more resilient, functional, and long-lasting projects.

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