2507 Stainless Steel Sheet

What is 2507 Duplex Stainless Steel?
2507 (UNS S32750) is a super duplex stainless steel combining ferritic and austenitic structures.   With 25% chromium, 7% nickel, 4% molybdenum, and 0.3% nitrogen, it delivers exceptional:
-PREN ≥ 40 (Pitting Resistance Equivalent)
-Yield strength 550 MPa (2x 316L stainless)
-Stress corrosion cracking resistance in chloride-rich environments

Chemical Composition (%)

Key Advantages of 2507 Plates
-Cost Efficiency
Thinner gauges achieve same strength as carbon steel (up to 50% weight reduction)
-Weldability
ER2594 filler metal enables crack-free joints
-Thermal Conductivity
15 W/m·K (30% higher than 316L) improves heat exchanger performance
-Certifications
NACE MR0175 for sour gas service
PED 2014/68/EU Category II
-Customization
Available in 0.5-100mm thickness ∙ 1500-3000mm width ∙ Shot blasting/2B/NO. 4 finishes

Industry Applications

The production process of 2507 stainless steel
1. Raw material preparation
The production of 2507 stainless steel begins with the selection of high-quality raw materials. The main components include iron, chromium, nickel and molybdenum. Chromium provides the corrosion resistance of stainless steel, nickel enhances the toughness of the material, and molybdenum further improves the corrosion resistance. The purity and proportion of raw materials are crucial to the quality of the final product.
2. Smelting and casting
During the smelting stage, the raw materials that have been strictly proportioned are sent into the electric arc furnace for high-temperature melting. This process is usually carried out at a temperature above 1600 degrees Celsius to ensure that all alloying elements are fully fused. The molten steel after smelting undergoes refining treatment to remove impurities and is then cast into steel ingots.
3. Hot working
After the steel ingot undergoes initial cooling, it enters the hot working stage. This stage includes forging and rolling. Through heating and mechanical pressure, steel ingots are processed into semi-finished products of different shapes and sizes, such as plates and pipes. This process not only improves the density of the material, but also enhances its mechanical properties.
4. Heat treatment
To further enhance the performance of 2507 stainless steel, heat treatment is an indispensable step. Solution treatment is usually adopted, which involves heating stainless steel to a specific temperature and then rapidly cooling it. This process enables the alloying elements to be uniformly distributed in the matrix, thereby enhancing the corrosion resistance and toughness of the material.
5. Surface treatment
Surface treatment is the last crucial step in the production process. Through processes such as pickling and polishing, the oxide scale and impurities on the surface are removed to enhance the surface finish and corrosion resistance of stainless steel. This not only enhances the appearance of the product but also prolongs its service life.
6. Inspection and Quality Control
Throughout the entire production process, strict quality control is an important link to ensure the product's qualification. From raw material inspection to finished product inspection, every step is monitored by professional technicians to ensure that 2507 stainless steel meets international standards.