ASTM 304 Stainless Steel: The Universal Workhorse of Austenitic Alloys

Introduction to Grade 304 Stainless Steel

Grade 304 is an , part of the 18-8 family, meaning it contains approximately 18 percent chromium and 8 percent nickel. This balance of chromium and nickel provides excellent corrosion resistance while maintaining ductility and ease of fabrication.

Grade 304 is also known as:

UNS S30400

EN 1.4301

AISI 304

It is available in various forms including sheets, plates, bars, pipes, and fittings, making it suitable for countless applications.

---

Key Features of Grade 304 Stainless Steel

The high chromium content allows 304 to form a passive oxide layer that protects against rust and corrosion in most environments.

It provides a balance of strength and toughness across a wide range of temperatures.

304 can be easily formed, welded, and machined, making it adaptable for complex designs.

The smooth surface of stainless steel is ideal for sanitary environments like food and medical industries.

While offering excellent performance, 304 is more cost-effective than higher alloyed grades such as 316 or 317L.