The selection of stainless steel flange materials should be based on a comprehensive assessment of the application scenario, corrosive environment, temperature, pressure, and other conditions. Below are common materials and their applicable scenarios:
304 Stainless Steel (06Cr19Ni10)
Features: Contains 18% chromium and 8% nickel, no molybdenum, resistant to general corrosion, cost-effective.
Applicable scenarios: Dry environments, food processing, architectural decoration, household appliance housings, etc.
Limitations: Prone to pitting corrosion in environments containing chloride ions (e.g., seawater, swimming pool water).
316 Stainless Steel (06Cr17Ni12Mo2)
Features: Contains 2.5% molybdenum, enhanced resistance to chloride ion corrosion, high-temperature resistance (≤649℃).
Applicable scenarios: Marine equipment, chemical pipelines, medical instruments, high-temperature and high-pressure environments.
304L/316L (Low Carbon Versions)
Features: Carbon content ≤0.03%, superior resistance to intergranular corrosion compared to standard 304/316.
Applicable scenarios: Equipment subjected to high-temperature welding or requiring long-term corrosion resistance (e.g., nuclear power, pharmaceuticals).
Other Materials
347 Stainless Steel (CF8C): Contains niobium, suitable for ultra-high-temperature (≥540℃) environments.
Duplex Stainless Steel: Combines austenitic and ferritic properties, higher strength, suitable for deep-sea or high-stress conditions.
Selection Recommendations
General Industrial Use: Prefer 304, low cost and meets most requirements.
Corrosive Environments: Choose 316 or 316L, molybdenum effectively resists chloride ion corrosion.
Special High-Temperature/High-Pressure Environments: Choose low-carbon or duplex material based on the specified temperature.
Post time: Nov-24-2025
