What is the difference between 1.4410 and 1.4501 stainless steel?

 

1.4410 is a super duplex stainless steel grade, typically designated as UNS S32750 (or 2507) or ASTM A182 F53. It is an austenitic-ferritic stainless steel containing high levels of chromium (25%), molybdenum (4%), and nickel (7%), offering exceptional strength and superior corrosion resistance particularly in chloride-rich and marine environments. It is available in various forms, including plates, coils, tubes, bars, and wires.

 

 

 

1.4501 is a high-performance Super Duplex stainless steel (X2CrNiMoCuWN25-7-4), often branded as Alloy 100/Zeron 100 or UNS S32760. It features an austenitic-ferritic structure, offering exceptional strength, high corrosion resistance, and excellent pitting resistance (PREN >40) in seawater and chemical environments. Key applications include marine engineering, oil & gas processing, and chemical production.

 

 

 

1.4410 vs. 1.4501：Standard & Equivalents

Standard	1.4410	1.4501
EN Designation	X2CrNiMoN25-7-4	X2CrNiMoCuWN25-7-4
UNS (USA)	S32750	S32760
Common Name	Alloy 2507 / SAF 2507	Zeron 100
AFNOR (France)	Z3 CND 25.06 Az	Z3 CNDW 25.07 Az

 

1.4410 vs. 1.4501 Stainless Steel:Chemical Composition (wt. %)

Standard values according to EN 10088-3.

Element	1.4410 (S32750)	1.4501 (S32760)
Carbon (C)	≤ 0.030	≤ 0.030
Chromium (Cr)	24.0 – 26.0	24.0 – 26.0
Nickel (Ni)	6.00 – 8.00	6.00 – 8.00
Molybdenum (Mo)	3.00 – 4.50	3.00 – 4.00
Nitrogen (N)	0.24 – 0.35	0.20 – 0.30
Copper (Cu)	≤ 0.50	0.50 – 1.00
Tungsten (W)	-	0.50 – 1.00
Manganese (Mn)	≤ 1.20	≤ 1.00

 

1.4410 vs. 1.4501 Stainless Steel:Mechanical Properties

At Room Temperature (Solution Annealed Condition).

Property	1.4410 (Value)	1.4501 (Value)	Unit
Yield Strength (Rp0.2)	≥ 530 - 550	≥ 530 - 550	MPa
Tensile Strength (Rm)	730 - 930	730 - 930	MPa
Elongation (A5)	≥ 25	≥ 25	%
Hardness (Brinell)	≤ 290	≤ 290	HBW
Impact Strength (ISO-V)	≥ 100	≥ 80	J (at 20°C)

 

 

What is the difference between UNS S32750 and S32760?

UNS S32750 (commonly known as Alloy 2507) and UNS S32760 (commonly known as Zeron 100) are both high-performance super duplex stainless steels, each possessing a Pitting Resistance Equivalent Number (PREN) greater than 40. The primary distinction between the two lies in the fact that S32760 contains additional alloying elements specifically copper (0.5%–1.0%) and tungsten (0.5%–1.0%). Compared to S32750, S32760 demonstrates superior corrosion resistance against specific inorganic acids and in highly corrosive acidic gas environments.

 

1.4410 vs. 1.4501 Stainless Steel: Corrosion Resistance

Both 1.4410 (UNS S32750) and 1.4501 (UNS S32760) are high-performance super duplex stainless steels, and their corrosion resistance significantly exceeds that of standard duplex steels. 1.4501 is an enhanced version of 1.4410; it typically contains tungsten (W) and copper (Cu), and in certain extreme environments characterized by high chloride levels, high acidity, or the presence of sulfides, its corrosion resistance is slightly superior to that of 1.4410.

 

1.4410 vs. 1.4501 Stainless Steel: Weldability

Both 1.4410 and 1.4501 are super duplex stainless steels, and both exhibit excellent and comparable welding characteristics. Welding is typically performed using matching filler materials (e.g., 25.10.4.L) to ensure that the weld metal retains high corrosion resistance. During the welding process, strict control over heat input-specifically by regulating the interpass temperature, which should generally be kept below 150°C-is required for both materials to prevent the formation of brittle phases.

1.4410 vs. 1.4501 Stainless Steel: Cost

1.4501 incorporates additional tungsten (W) and copper (Cu) beyond the composition of 1.4410. These two alloying elements are expensive, significantly increasing raw material costs. According to data from material databases, the relative "base metal price" of 1.4501 is 22, compared to 20 for 1.4410, indicating that 1.4501 is the more costly material.

 

1.4410 vs. 1.4501 Stainless Steel: Which One to Choose?

If you require a standard, high-strength super duplex stainless steel one that is widely available and has been thoroughly proven in seawater and conventional oil and gas environments choose 1.4410 (S32750).
If the operating environment is highly acidic (for example, containing sulfuric acid), or if specific project specifications (such as Zeron 100) mandate the use of copper and tungsten elements to provide additional protection, choose 1.4501 (S32760).

 

We maintain a year-round stock of 1.4410 plates and tubes to meet our customers' immediate requirements for emergency repairs or small-scale projects. We offer precision laser and plasma cutting services for plates, centerless grinding for bars, and cut-to-length services for tubes.

 

We provide 1.4410 in all major industrial formats to ensure material consistency across your entire project.

Product Category	Specifications	Size Range (Typical)
Seamless Pipes	ASTM A790, EN 10216-5	1/2" to 24" (SCH 10S to XXS)
Welded Pipes	ASTM A790, A928	6" to 48" (Custom wall thickness)
Plates & Sheets	ASTM A240 / EN 10088-2	Thickness: 0.5mm – 50mm
Round Bars	ASTM A276, A479	Diameter: 6mm – 450mm
Fittings & Flanges	ASTM A815, B16.5	Elbows, Tees, WN/SO/Blind Flanges
Heat Exchanger Tubes	ASTM A789	OD: 6.0mm – 38.1mm

 

 

We provide professional, sea-freight-compatible packaging solutions-including reinforced wooden crating, internal plastic lining for tube protection, and heavy-duty steel strapping-to ensure that shipments remain free from damage during transit.