Introduction
1Cr17Ni2 stainless steel, also known as AISI431, is a ferritic stainless steel alloy with excellent corrosion resistance, strong mechanical strength and good formability. Due to its excellent corrosion resistance, 1Cr17Ni2 stainless steel is often used for components such as pump components, valves, impellers, washers, and fasteners requiring resistance to rust and corrosion in a wide range of chemical and industrial applications.
Chemical Composition
The chemical composition of 1Cr17Ni2 stainless steel includes the following major elements:
• Iron (Fe): 78.6%-81.6%
• Chromium (Cr): 16.0%-18.0%
• Nickel (Ni): 1.0%-2.0%
• Carbon (C): 0.08% max
• Manganese (Mn): 0.5% max
• Silicon (Si): 0.5% max
Other elements present in small amounts include sulfur (up to 0.03% max) and phosphorus (up to 0.04% max).
Physical Properties
1Cr17Ni2 stainless steel has good physical properties, low thermal conductivity and moderate electrical conductivity, as well as excellent resistance to corrosion and oxidation. Its tensile strength is 570–700MPa with a yield strength of 205-315MPa, along with an elongation of 30-35% in the annealed condition. 1Cr17Ni2 stainless steel has a modulus of elasticity of 200-193 GPa and a density of 7.75g/cm3. The melting point of 1Cr17Ni2 stainless steel is about 1395-14 technology degree Celsius.
Mechanical Properties
1Cr17Ni2 stainless steel has excellent mechanical properties, including good formability, weldability and ductility. It has a high tensile strength and a yield strength of 205-315MPa, along with a 30-35% elongation in the annealed condition. It has good workability and can be hot or cold formed. 1Cr17Ni2 stainless steel is also resistant to scaling at temperatures up to 1500 degree Celsius and is readily weldable using techniques such as TIG and MIG welding.
Heat Treatment
1Cr17Ni2 stainless steel has a heat treatment which involves heating it slowly and uniformly to 825-900℃ (1517-1652℉), and then cooling it rapidly in air or water. This process is called tempering, or tempering and it helps to improve its strength and hardness. The hardness of 1Cr17Ni2 stainless steel can be improved by annealing. This involves heating the steel at a temperature of between 650-740℃ (1202-1364℉) and then cooling it quickly.
Applications
Due to its superior corrosion resistance and strength, 1Cr17Ni2 stainless steel is suitable for a wide range of applications, including components requiring resistance to rust and corrosion in a wide range of chemical and industrial applications. Possible applications include pumps, valves, impellers, washers, fasteners and pumps components.
Conclusion
In conclusion, 1Cr17Ni2 stainless steel has excellent corrosion resistance, strong mechanical strength and good formability, making it suitable for applications requiring resistance to rust and corrosion in a wide range of chemical and industrial applications. Its physical properties, mechanical properties and heat treatments make this stainless steel alloy a popular choice for a range of components, including pumps, valves, impellers, washers and fasteners.
