Stainless steel magnetic pumps are known for being leak-free. They are efficient and environmentally safe. These pumps are used in many industries, including chemical, pharmaceutical, petroleum, electroplating, and food processing.
This article introduces the , such as 304, 316L, and 2205. It aims to improve the understanding of their characteristics and uses.
1. - Austenitic stainless steel: 304 (ASTM A276) and 316L (ASTM A479)
Chemical composition：
304 stainless steel: 18% chromium, 8% nickel, ≤0.08% carbon
316L stainless steel: 16% chromium, 10% nickel, 2% molybdenum
Corrosion resistance：
304:
Acid and alkali resistant, but weak in high chloride or strong acid environments.
Performs well in neutral/weakly acidic media (such as tap water, kitchen detergents), but is prone to rust in chloride-rich environments (seawater, salt water).
316L:
Chloride resistance up to 1000 ppm (10 times higher than 304).
Excellent corrosion resistance in acidic, alkaline, brine and chloride-rich media.
Processing performance：
304: High plasticity, suitable for complex pump components.
316L: Higher strength and hardness, suitable for demanding mechanical applications.
Temperature range：
304: Suitable for low temperature environments.
316L: Stable under high temperature conditions.
Application：
304: Food processing, chemical laboratories, environmental equipment (neutral media, standard temperature).
316L: Petroleum, chemical and pharmaceutical industries (corrosive media, high temperature environment).
2. - duplex stainless steel (2205/2507)
Chemical composition：
2205: 21% chromium, 2.5% molybdenum, 4.5% nickel-nitrogen alloy. High strength and impact toughness, but difficult to bend/form.
2507: Higher chromium/molybdenum content for greater strength, hardness, and thermal conductivity.
Corrosion resistance：
2205:
Excellent performance in marine/atmospheric environments, but not suitable for temperatures above 300°C or below -50°C.
2507:
Excellent resistance to pitting, crevice, and uniform corrosion, especially in chloride-rich environments.
Stable in high temperature/oxidizing environments.
Machinability：
2205: Relatively easy to machine.
2507: Requires advanced technology due to high strength/hardness.
Applications：
2205: Chemical and marine industries (moderate corrosion resistance).
2507: Offshore, petrochemical (high corrosion/high strength requirements).
3. - special coating technology: Hastelloy C276
Chemical composition：
The main elements are nickel (Ni), chromium (Cr), molybdenum (Mo), iron (Fe), tungsten (W), titanium (Ti) and aluminum (Al). These elements help reduce intergranular corrosion.
Corrosion resistance：
Excellent resistance to chloride corrosion.
High thermal stability and heat resistance.
Processing performance：
Excellent weldability and cold/hot processing.
Application：
Chemical, petroleum and offshore engineering (suitable for chloride-rich environments).
Choosing the right material for a stainless steel magnetic pump requires a combination of performance and operational requirements. For customized solutions or technical assistance, please contact [Changyu Pump Valve] (changyupump.com). We provide complete services from material analysis to on-site simulation.