Nikopolium® NP 2205 / NP 2507 combine the corrosion resistance of nickel alloys with the cost, strength, and sustainability advantages of duplex stainless steel.
Reliable performance in OCTG, sour gas, and CO₂-rich environments.
Resistant to sulfuric acid, caustic soda, and nitric acid systems.
Proven durability in cryogenic piping and heat exchanger applications.
High resistance to seawater and harsh offshore conditions.
Engineered for high-pressure and corrosive media environments.
Outstanding chloride resistance for long-lasting reliability.
Extreme Temperature Range
Operatesreliably from –60 °C to +350 °C
Advanced Corrosion Resistance
CPT & CCT beyond S32750;
passes ASTM G48, G28 with superior margins
Cost-Efficient Design
Enables thinner walls and replaces expensive Ni alloys
Exceptional Mechanical Strength
Tensile strength up to 1000 MPa; elongation up to 60%
Sustainable by Design
Low nickel content and AOD-compatible production
Microstructure Engineered
Optimized ferrite–austenite balance and high-angle grain boundaries
High Impact Strength
Up to 210 J at room temp and 188 J at –60 °C
Balev 304L® has a good resistance to atmospheric corrosion, as the high chromium content of the material provides resistance to oxidizing solutions such as nitric acid up to 55% weight and up to 176°F (80°C). Balev 304L® can also operate successfully in caustic solutions free of chlorides.
Centravis's Balev 304L® and Balev 316L® offer superior formability compared to traditional Duplex steels, making them ideal for complex designs and precision applications.
Manufactured with advanced heat treatment technologies, Balev 304L® and Balev 316L® ensure a stable, fully austenitic microstructure for consistent performance.
Both grades exhibit excellent weldability without the need for post-weld heat treatment, maintaining non-magnetic properties throughout all conditions.
Built to outperform in the toughest environments
NIKOPOLIUM™ NP 2205 and NP 2507 are engineered with Centravis proprietary grain boundary engineering and advanced heat treatment technologies. This unique approach enhances corrosion resistance to a level comparable with premium Nickel Alloys, while preserving the mechanical strength and cost efficiency of duplex stainless steels.
Proven reliability in aggressive media
In ASTM G48 immersion tests, NP 2205 resists pitting 10 °C higher than standard duplex (UNS S31803), while NP 2507 withstands 5 °C more than super duplex (UNS S32750). Both grades also surpass Aramco 01-SAMSS-047 requirements for intergranular corrosion (ASTM G28, Method A), ensuring long-term durability in demanding environments such as offshore structures, chemical processing plants, and high-pressure oil & gas systems.
Microstructural Stability
Enhanced microstructure is designed by means of the advanced grain boundary engineering with the near-ideal phase distribution and special grain boundaries ensuring consistent strength, toughness and improved resistance to corrosion in demanding service environments.
Performance-Driven
Combines tensile strength, impact toughness (–60 °C), and CPT/CCT above standard grades.
Commercially Viable
Displaces Alloy 625, C-276 in many use cases at a fraction of the cost.
Advanced microstructural refinement
The improved, recrystallized microstructure resists phase transformation, enhances resistance to pitting and intergranular corrosion, and supports durability under extreme thermal and corrosive conditions.
Balev 304L® has a good resistance to atmospheric corrosion, as the high chromium content of the material provides resistance to oxidizing solutions such as nitric acid up to 55% weight and up to 176°F (80°C). Balev 304L® can also operate successfully in caustic solutions free of chlorides.
Centravis's Balev 304L® and Balev 316L® offer superior formability compared to traditional Duplex steels, making them ideal for complex designs and precision applications.
Manufactured with advanced heat treatment technologies, Balev 304L® and Balev 316L® ensure a stable, fully austenitic microstructure for consistent performance.
Both grades exhibit excellent weldability without the need for post-weld heat treatment, maintaining non-magnetic properties throughout all conditions.
Max Operating Temp of Nikopolium™:
Up to 350 °C, made possible by stable microstructure and grain boundary engineering
Min Operating Tempof Nikopolium™:
Qualified down to –60 °C with excellent toughness
Enables new use cases:
Operating Temperature Ranges (°C)
Material
Yield strength Rp0,2
Tensile strength Rm
Impact strength
Elongation
MPa
MPa
MPa
MPa
J
J
%
%
20 °C
350 °C
20 °C
350 °C
at 20 °C
at -60 °C
at 20 °C
at 350 °C
S31803
>450
310
>620
560
150
90
>25
21
NP 2205
>565
551
>780
1000
168
158
>25
48,5
S32750
>550
365
>800
580
180
100
>15
18
NP 2507
>650
451
>850
741
210
188
>22
60
In critical environments, engineers often face a dilemma: settle for standard duplex and risk early failure, or use nickel alloys like Alloy 625 or C-276 – which significantly increase project cost.
Material
Corrosion
Resistance
Cost
Typical
Use
S31803 / S32750
Moderate / High
$$
General industrial
Nikopolium NP
Very High
$$$
Critical service
Alloy 625 / C-276
Excellent
$$$$$
Severe duty
1. Thinner Wall Designs High strength = less material needed.
Result: Reduces weight, material, and transport cost
3. Lower Alloying Costs Reduced nickel, molybdenum, copper.
Result: More stable pricing and supply chain risk mitigation allographic orientation confirming uniformity”
2. Longer Service Life Excellent resistance to corrosion and fatigue.
Result: Fewer shutdowns, repairs, and replacements
“With NIKOPOLIUM, we lower nickel content to just ~4.5–6.5% in NP 2205 and ~6–8% in NP 2507, compared to 60%+ in traditional Ni-based alloys. This significantly reduces environmental impact, minimizes reliance on critical raw materials, and supports more stable, ethical, and sustainable supply chains. Combined with compatibility for low-emission AOD steelmaking and the ability to achieve thinner, stronger wall designs, NIKOPOLIUM sets a new benchmark in efficiency and sustainability.”
Andriy Balev
Ph.D., Materials Engineer and Head of R&D at Centravis
CENTRAVIS is a global leader in delivering high-quality seamless stainless steel pipes and tubes. As one of Europe's largest specialized manufacturers, our production facilities feature state-of-the-art hot-extrusion and cold-drawing shops. Our extensive product portfolio includes over 1,000 standard sizes made from more than 100 types of corrosion-resistant and heat-resistant steel grades. We proudly serve key regions worldwide through our network of sales offices in Ukraine, Germany, Switzerland, Italy, and the United States, as well as sales agents across Brazil, the Middle East, Korea, Australia, and more.
Presentations & Catalogs
Shape the future with NIKOPOLIUM®
Fill out the form below, and our team will connect with you to discuss how NIKOPOLIUM® can strengthen your projects and deliver long-term reliability.
2025 Centravis
