400 Series

400 series stainless steel is a group of ferritic and martensitic stainless steels, primarily known for their magnetic properties and good corrosion resistance. Here’s a quick overview:

Types

• Ferritic (e.g., 405, 409, 430): These grades are characterized by their moderate corrosion resistance and good formability. They are typically used in automotive applications, decorative trims, and kitchen equipment.
• Martensitic (e.g., 410, 420, 440): These grades are harder and more wear-resistant, making them suitable for applications like cutlery, tools, and industrial components. They can be heat-treated to enhance their strength.

Properties

• Corrosion Resistance: Generally lower than the 300 series stainless steels but still adequate for many environments.
• Magnetic: Unlike the 300 series, the 400 series is magnetic.
• Strength: Offers good strength and hardness, especially in martensitic grades.

Applications

• Household Items: Cutlery, kitchen appliances, and cookware.
• Automotive: Exhaust systems and trim.
• Industrial: Shafts, valves, and other components requiring moderate corrosion resistance and high strength.

If you need more specific information or details about a particular grade, feel free to ask!