What is the difference between 1.4301 and AISI 304?

When sourcing stainless steel, the designation 1.4301 is often used alongside AISI 304. While these two terms are commonly used interchangeably, there are subtle differences between them that can impact performance, cost, and compliance in specific industrial applications. Understanding the distinction between 1.4301 and AISI 304 is crucial for procurement teams to make informed decisions based on material properties, standards, and cost-effectiveness.

 

What is material 1.4301?

Inox 304 stainless steel, equivalent to AISI 304 and the DIN standard En 1.4301 stainless steel, is a European grade 1.4301 (or X5CrNi18-10) stainless steel with an AISI equivalent of AISI 304, also known as UNS S30400. It is a widely used austenitic stainless steel known for its excellent corrosion resistance, formability, and weldability. Due to its chromium and nickel content, it is often referred to as "18/8" stainless steel.

 

What is the material code for AISI 304?

The main material codes for AISI 304 stainless steel include UNS S30400, European 1.4301, and EN designation X5CrNi18-10, also known as 18/8 stainless steel, offering excellent corrosion resistance and formability for many applications.

 

Is EN 1.4301 the Same as AISI 304 Stainless Steel?

Yes, EN 1.4301 is essentially the same material as AISI 304 stainless steel; they are equivalent designations for the world's most common austenitic stainless steel, known for its excellent corrosion resistance, formability, and weldability, often called "18/8" due to its chromium/nickel content.

 

EN 1.4301 vs AISI 304: Equivalent Standards

Both EN 1.4301 and AISI 304 refer to an austenitic stainless steel with excellent corrosion resistance, good formability, and reliable weldability. These grades are widely used in food processing, construction, and industrial equipment.

Standard	Grade Name
EN (Europe)	1.4301
AISI/ASTM (USA)	304
UNS	S30400
ISO	X5CrNi18-10

 

EN 1.4301 vs AISI 304:Chemical Composition

Element	EN 1.4301 / AISI 304
Carbon (C)	≤ 0.07%
Chromium (Cr)	17.5–19.5%
Nickel (Ni)	8.0–10.5%
Manganese (Mn)	≤ 2.0%
Silicon (Si)	≤ 1.0%
Phosphorus (P)	≤ 0.045%
Sulfur (S)	≤ 0.015%
Nitrogen (N)	≤ 0.11%

 

EN 1.4301 vs AISI 304:Mechanical Properties

Property	Typical Value
Yield Strength	≥ 210 MPa
Tensile Strength	520–720 MPa
Elongation	≥ 45%
Hardness (HB)	≤ 215 HB

 

 

What is the difference between 1.4301 and 1.4307 stainless steel?

In summary, EN 1.4301 (AISI 304) is generally preferred when higher mechanical strength and wear resistance are required, while EN 1.4307 (AISI 304L) is a better choice for applications involving extensive welding or exposure to corrosive environments.

 

What is the difference between 1.4401 and 1.4301 stainless steel?

The key difference between 1.4401 (AISI 316) and 1.4301 (AISI 304) is molybdenum content. 1.4401 contains around 2–2.5% molybdenum, which significantly improves its resistance to pitting and crevice corrosion, especially in chloride-rich environments like seawater. As a result, 1.4401 is preferred for marine, chemical, or coastal applications, while 1.4301 is suitable for general indoor or mildly corrosive conditions.

 

What is the difference between AISI 304 and AISI 431?

Stainless steel 431 is commonly used to produce nuts, bolts, pumps, and shafts. It contains higher levels of chromium and nickel than stainless steel 304, which gives it higher strength and hardness. As a result, it's an excellent option for high-stress applications that require high strength levels.

 

If you have project requirements for 1.4301 AISI 304 stainless steel, please feel free to place an order. GNEE Stainless Steel is an independent stockist and processor of 304/304L stainless steel. With our extensive inventory and superior processing capabilities, we can meet the needs of most projects, whether for stock products or custom orders. We offer: stock size plates and sheets, stock length round bars, custom-sized plates and sheets, custom-sized round bars, cold forming of plates, sheets, and round bars, and any other necessary processing services. For any inquiries, please email sales@gneestainless.com