1.4512 vs 1.4301 stainless steel: Corrosion resistance

What is the equivalent of 1.4301 stainless steel?

The primary equivalent for European standard 1.4301 stainless steel (also known as X5CrNi18-10) is the widely used American AISI 304 or UNS S30400, a versatile austenitic stainless steel known for good corrosion resistance and formability, often called "18/8" due to its ~18% Chromium and ~8% Nickel content.

 

What is 1.4512 material?

Material 1.4512 is a ferritic stainless steel, also known as AISI 409 or X2CrTi12, characterized by its chromium, titanium stabilization for good corrosion/heat resistance, making it ideal for automotive exhaust systems, construction, and household appliances, though it has limited weldability and lower strength than austenitic steels.

 

1.4512 vs 1.4301 stainless steel: Chemical Composition 

Element	1.4512 (AISI 409)	1.4301 (AISI 304)
C	≤ 0.08 %	≤ 0.07 %
Cr	10.5–11.75 %	18.0–20.0 %
Ni	≤ 0.50 %	8.0–10.5 %
Mn	≤ 1.00 %	≤ 2.00 %
Si	≤ 1.00 %	≤ 1.00 %
Ti	6×(C+N) min, ≤ 0.75 %	–
Mo	–	–
Fe	Balance	Balance

 

1.4512 vs 1.4301 stainless steel: Corrosion Resistance Performance

Parameter	1.4512 (AISI 409)	1.4301 (AISI 304)
PREN (Pitting Resistance Equivalent Number)​	~10–12	~18–19
General atmospheric corrosion​	Good (dry air, mild conditions)	Excellent
Freshwater / low chloride​	Fair–good	Excellent
Seawater / high chlorides​	Poor – risk of pitting/cracking	Good (better than 1.4512, but not as good as 316)
Acidic environments (weak organic acids)​	Limited resistance	Better resistance
Intergranular corrosion (welded)​	Controlled by Ti stabilization	Requires low‑C (304L) for best resistance
Oxidation resistance (high temp)​	Up to ~750 °C short term	Up to ~850 °C short term

 

1.4512 vs 1.4301 stainless steel: Mechanical Properties (Supporting Context)

Property	1.4512	1.4301
Tensile Strength (MPa)	400–550	500–700
Yield Strength (MPa)	220–310	205–310
Elongation (%)	≥ 20	≥ 40
Hardness (HB)	≤ 180	≤ 215
Magnetic	Yes (ferritic)	No (austenitic, annealed)

 

What is the main difference between 1.4512 and 1.4301?
1.4512 (AISI 409) is a ferritic stainless steel with 10.5-11.5% chromium, commonly used in automotive exhaust systems. 1.4301 (AISI 304) is an austenitic stainless steel containing 18% chromium and 8% nickel, offering excellent corrosion resistance and formability. It is widely used in cookware, medical devices, and chemical equipment.

 

Which steel is more magnetic, 1.4512 or 1.4301?
1.4512 (ferritic) is magnetic in all conditions due to its body-centered cubic (BCC) crystal structure. 1.4301 (austenitic), with its face-centered cubic (FCC) structure, is non-magnetic or weakly magnetic.

 

How do the high-temperature resistance properties of 1.4512 and 1.4301 differ?
1.4512 can withstand higher temperatures (up to 750°C for continuous use) and offers better oxidation resistance in high-temperature environments, making it suitable for exhaust systems. 1.4301, however, typically withstands temperatures up to about 870°C, but its corrosion resistance decreases at higher temperatures compared to 1.4512, particularly in acidic or chloride-rich environments.

 

If you have project requirements for 1.4301 and 1.4512 stainless steel bars, we welcome your order. GNEE has a large inventory of popular products for you to choose from. These materials can be processed into various practical product forms, including plates, coils, tubes, bars, and wires. For detailed chemical composition information and free samples, please contact our factory immediately. We offer competitive prices and excellent service.

Email: sales@gneestainless.com