Composition and Properties of 430 Stainless Steel

Imagine that you are cooking a delicious meal in the kitchen, and suddenly, your kitchen knife starts to turn black from the blade. You gently wipe it with your hand and find that it has become dull and not the shiny stainless steel you are familiar with. This may be because you are using a knife made of 430 stainless steel. So, what is 430 stainless steel? What are the composition and properties of 430 stainless steel? Next, let’s lift the veil of 430 stainless steel together.

What is 430 stainless steel?

430 stainless steel is a general-purpose steel with good corrosion resistance, better thermal conductivity than austenite, lower thermal expansion coefficient than austenite, heat-resistant fatigue, and added stabilizing element titanium, resulting in good mechanical properties at the weld seam.

430 stainless steel is used for architectural decoration, fuel burner components, household appliances, and home appliance components. 430F is a steel with easy cutting performance added to 430 steel, mainly used for automatic lathes, bolts, and nuts. 430LX is a steel with Ti or Nb added to 430 steel and lower C content, improving the processing and welding performance, mainly used for hot water tanks, hot water supply systems, sanitary appliances, household durable appliances, bicycle flywheels, etc.

Due to its chromium content, it is also known as 18/0 or 18-0. Compared to 18/8 and 18/10, it contains slightly less chromium and has a correspondingly lower hardness.

What is the chemical composition of 430 stainless steel?

The chemical composition of 430 stainless steel is roughly as follows:

1. Carbon (C): less than or equal to 0.12%
2. Silicon (Si): less than or equal to 1.00%
3. Manganese (Mn): less than or equal to 1.00%
4. Phosphorus (P): less than or equal to 0.040%
5. Sulfur (S): less than or equal to 0.030%
6. Chromium (Cr): 17.0% to 19.0%
7. Nickel (Ni): less than or equal to 0.60%
8. Other elements: iron (Fe) and impurity elements

Among them, chromium is the main alloying element of 430 stainless steel, which provides good corrosion resistance. Compared to other stainless steel materials, 430 stainless steel contains less nickel, making it more affordable.

What are the mechanical properties of 430 stainless steel?

The mechanical properties of 430 stainless steel are as follows:

1. Tensile strength: above 450 MPa (MPa)
2. Yield strength: above 205 MPa
3. Elongation: above 22%
4. Hardness: HBW 183 to 217

It should be noted that the mechanical properties of 430 stainless steel are affected by manufacturing processes and heat treatment states, and the properties may vary under different conditions. In addition, the mechanical properties of 430 stainless steel may also change under high-temperature environments. Therefore, in specific applications, appropriate materials and processing methods should be selected based on actual conditions.

What are the physical properties of 430 stainless steel?

The physical properties of 430 stainless steel are as follows:

1. Density: 7.7 g/cm³
2. Coefficient of thermal expansion: 10.4 μm/(m·K) (within the temperature range of 20°C to 100°C)
3. Thermal conductivity: 25 W/(m·K)
4. Resistivity: 0.60 Ω·mm²/m

It should be noted that these physical property values are for reference only, and the actual values may be affected by various factors such as the manufacturing process, heat treatment state, and testing conditions.

Properties of 430 Stainless Steel Plate

It has good corrosion resistance and general-purpose steel grades, better thermal conductivity than austenite, lower thermal expansion coefficient than austenite, heat fatigue resistance, and the addition of stabilizing element titanium, resulting in good mechanical properties at the weld seam. It is mainly used for architectural decoration, fuel burner components, household appliances, and home appliance components.

Conclusion

Thank you for reading our article and we hope it can help you to have a better understanding of the composition and properties of 430 stainless steel. If you want to find more information about the 430 stainless steel products, we’d advise you to visit Sino Stainless Steel for more information.

As a top supplier of stainless steel products across the whole world, Sino Stainless Steel provides customers with high-quality stainless steel products such as  Stainless Steel Angles, Stainless Steel Channels, 201 Stainless Steel Strips & 304 Stainless Steel Strips, 430 Stainless Steel Plates, Stainless Steel Hexagon Bars, Hot-rolled Stainless Steel, Colored Stainless Steel Sheets, Stainless Steel Perforated Sheets, Cold-rolled Precision Stainless Steel, Stainless Steel Wire, and Embossed Stainless Steel Plates.