1. The corrosion resistance
The high chromium and molybdenum content of SAF 2507 makes it have strong resistance to organic acids such as formic acid and acetic acid. SAF2507 alloy also has strong corrosion resistance to inorganic acids, especially those containing chloride.
SAF2507 is more resistant to dilute sulphuric acid mixed with chloride ions than 904L, an austenitic alloy designed to resist pure sulphuric acid corrosion.
Grade 316L is not intended for use in hydrochloric acid environments where it may be subject to local or global corrosion. SAF2507 can be used in diluted hydrochloric acid environment and has strong resistance to spot damage and crack corrosion.
2. Intergranular corrosion
The low carbon content of SAF 2507 greatly reduces the risk of carbide precipitation in the intergranular during heat treatment, and therefore, the alloy has a strong resistance to carbide-related intergranular corrosion.
3. Stress corrosion cracking
The compound structure of SAF 2507 makes it have strong resistance to stress corrosion cracking. Due to its high alloy content,SAF 2507 has better corrosion resistance and strength than 2205.
Cracks are almost inevitable in construction and the like, making stainless steel more vulnerable to corrosion in a chlorinated environment. SAF 2507 is highly resistant to crack corrosion. Isocorrosion curve of SAF 2507 in sulphuric acid containing 2000ppm chloride ions 0.1mm /year; The isocorrosion curve in hydrochloric acid was 0.1 mm/year.
Mechanical properties :SAF 2507 has high compressive strength, impact strength, low coefficient of thermal expansion and high thermal conductivity. These properties are applicable to many structural parts and mechanical parts. SAF 2507 has a high impact strength and is not suitable for long-term exposure to temperatures higher than 570°F, which may weaken its toughness. Tensile strength: σb≥730Mpa; Elongation: δ≥20%
Welding material: ER2594 wire, E2594 electrode
Applications: Pulp and paper industry, seawater desalination, flue gas purification, heat exchanger, chemical liquid cargo ship pipeline system, seawater system, etc.

S32750 Stainless steel pipe Specification

S32750 Stainless steel pipe Mechanical Property

S32750 Stainless steel pipe Chemical Composition