1. General corrosion
The high chromium and molybdenum content of SAF 2507 makes it strongly resistance to organic acids such as formic acid and acetic acid. SAF 2507 alloy has strong resistance to inorganic acids, especially those containing chlorides. Anti-corrosion capability.
Compared to 904L, SAF2507 has a higher corrosion resistance of diluted sulfuric acid mixed with chloride ions. The 904L is an austenitic alloy, which is dedicated to resisting corrosion of pure sulfuric acid.
Grade 316L cannot be used in a hydrochloric acid environment, it may suffer local corrosion or general corrosion. SAF2507 can be used in a diluted hydrochloric acid environment, with strong resistance to point damage and crack corrosion.
2. Intergranular corrosion
The lower carbon content of the nSAF 2507 greatly reduces the risk of carbide precipitation in the intergranular during heat treatment, so this alloy has a great ability to resist intergranular corrosion associated with carbide.
3. Corrosion cracking under stress
The duplex structure of SAF 2507 gives it great resistance to corrosion cracking under stress. Due to its higher alloy content, the corrosion and strength resistance of SAF 2507 are better than 2205.
Cracks are almost inevitable in construction and other aspects, making stainless steel more susceptible to corrosion in a chloride environment. SAF 2507 has a great ability to resist crack corrosion. Iso-corrosion curve in hydrochloric acid 0.1 mm / year.
Mechanical properties: SAF 2507 has high compression resistance, impact resistance, low thermal expansion coefficient and high thermal conductivity. These features are suitable for many structural parts and mechanical parts. SAF 2507 has high impact resistance and is not suitable for long-term placement at an ambient temperature above 570oF, this can weaken its toughness. Tensile strength: .b≥730Mpa; Elongation: δ≥20%
Weld materials to match: welding wire ER2594, welding rod E2594
Application areas: pulp and paper industry, seawater desalination, flue gas purification, heat exchangers, chemical tank piping systems, seawater systems, etc.
