What is the difference between 1.4571 and 1.4301 material?

What is EN 1.4301 material?

EN 1.4301 material is equivalent to AISI 304 stainless steel, also known as X5CrNi18-10. Due to its composition (containing approximately 18% chromium and 8% nickel), this material is often referred to as "18/8" stainless steel. It is the most common austenitic stainless steel, with other equivalent grades including UNS S30400 and BS 304S31.

 

What is EN 1.4571 material?

EN 1.4571 material is equivalent to AISI 316Ti stainless steel. Both grades refer to the same titanium-stabilized austenitic stainless steel, with 1.4571 being the European Standard (EN) grade and 316Ti being the American Standard (AISI) grade. It is known for its excellent corrosion resistance, good high-temperature performance, and suitability for applications such as welded joints. It is widely used in chemical, petrochemical, and food processing industries.

1.4301 vs 1.4571 stainless steel: Chemical Composition

1.4301 (X5CrNi18-10) is a classic austenitic stainless steel composed of 17-19.5% chromium, 8-10.5% nickel, and ≤0.07% carbon, without molybdenum. 1.4571 (X6CrNiMoTi17-12-2) builds upon this by adding 2-2.5% molybdenum and ≤0.7% titanium for enhanced stability.

Element	1.4301 (AISI 304)	1.4571 (AISI 316Ti)
Chromium (Cr)	17.5–19.5%	16.5–18.5%
Nickel (Ni)	8.0–10.5%	10.5–13.5%
Molybdenum	-	2.0–2.5%
Titanium (Ti)	-	≥5 × C (stabilizer)
Carbon (C)	≤ 0.07%	≤ 0.08%

 

1.4301 vs 1.4571 stainless steel: Mechanical & Physical Properties

Property	1.4301 (304)	1.4571 (316Ti)
Tensile Strength (MPa)	500–700	540–750
Yield Strength (MPa)	≥ 190	≥ 230
Elongation (%)	≥ 45	≥ 40
Density (g/cm³)	7.9	8.0
Max Continuous Temp (°C)	~870°C	~900°C (better post-weld stability)

 

1.4301 vs. 1.4571 Stainless Steel: Corrosion Resistance

1.4301 exhibits excellent corrosion resistance in mild environments (e.g., air, fresh water, and non-corrosive chemicals), making it suitable for everyday applications. 1.4571, due to its molybdenum content, offers superior corrosion resistance compared to 1.4301, significantly improving its resistance to pitting, crevice corrosion, and chloride corrosion, making it ideal for harsher environments such as coastal facilities, chemical processing, and high-salt environments.

1.4301 vs. 1.4571 Stainless Steel: Weldability

1.4301 stainless steel has good weldability but requires meticulous post-weld heat treatment or the use of low-carbon variants (e.g., 1.4306) to avoid sensitization and intergranular corrosion in weld joints. 1.4571 stainless steel, titanium-stabilized, offers superior weldability and eliminates the risk of chromium carbide precipitation, ensuring reliable joint integrity and corrosion resistance even in complex welded structures without the need for additional heat treatment.

1.4301 vs. 1.4571 Stainless Steel: Stability

1.4301 stainless steel lacks stabilizing elements, and during welding or long-term use, chromium carbide easily precipitates at grain boundaries under high temperatures. Unless a low-carbon version is used or post-weld heat treatment is performed for stabilization, its corrosion resistance will decrease. 1.4571 stainless steel itself contains titanium, which combines with carbon to prevent the formation of chromium carbide. Even in welding or high-temperature applications, it ensures stable corrosion resistance and mechanical properties without the need for additional measures.

1.4301 vs. 1.4571 Stainless Steel: Applications

1.4301 stainless steel is widely used in general applications such as kitchenware, building decoration, household appliances, and non-critical piping. 1.4571 is suitable for more demanding environments, including chemical processing equipment, marine hardware, food and pharmaceutical processing, and components exposed to chloride-rich or corrosive media.

 

What is the difference between 1.4404 and 1.4571?
The main difference is that 1.4404 (316L) has superior general corrosion resistance and cold formability, while 1.4571 (316Ti) has better resistance at higher temperatures due to the addition of titanium. This titanium stabilization in 1.4571 makes it suitable for elevated temperature applications, but the titanium carbo-nitride particles can slightly reduce its polishability and increase tool wear during machining compared to 1.4404.  

 

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