Stainless Steel Water Tank Material Guide: How to Choose Between SUS304 and SUS316L?
Stainless steel water tanks are one of the most popular water storage equipment on the market, with SUS304 and SUS316L being the two most common materials. Many users face a dilemma when purchasing: can the lower-priced 304 meet requirements? When must 316L be chosen? This article provides detailed answers.
Characteristics of SUS304 Stainless Steel
SUS304 is the most commonly used grade of austenitic stainless steel, containing 18% chromium and 8% nickel. Main characteristics include: good corrosion resistance, able to resist most weak acids and alkalis; excellent processing performance, easy to weld; relatively economical price. Application scenarios: domestic water and fire water storage for ordinary urban residential and commercial buildings in areas with general water quality conditions.
Characteristics of SUS316L Stainless Steel
SUS316L adds 2-3% molybdenum element based on 304 and reduces carbon content (L represents low carbon). The addition of molybdenum significantly improves resistance to pitting and crevice corrosion, especially greatly enhancing resistance to chloride ions. Application scenarios: coastal areas (salt in air), industrial areas (corrosive gases), chemical plants, food processing plants, medical institutions, and other places with extremely high water quality requirements.
Selection Recommendations
Practical usage selection recommendations:
- For ordinary urban residential buildings, schools, office buildings, where tap water quality meets standards, SUS304 can meet needs at a reasonable price.
- SUS316L is strongly recommended in any of these situations: project is within 30km of coastline; serious local industrial pollution; water users include hospitals, food factories, pharmaceutical companies; water source is groundwater with high mineralization.
- Regardless of material choice, ensure purchasing from formal manufacturers and require material inspection reports and food-grade hygiene permits.
Beijing Yuanhui FRP provides stainless steel water tanks in both SUS304 and SUS316L specifications with third-party material inspection reports available. Welcome to consult.