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420f Stainless Steel

Get the best of both worlds with 420F stainless steel - high machinability and corrosion resistance.

Achieve precision and durability with 420F stainless steel.

420F stainless steel - the perfect material for high-volume machining and complex parts.

420F stainless steel is a free-machining variation of 420 stainless steel that contains sulfur, which makes it easier to cut and machine. It is helpful in high-volume machining applications and for the production of complex parts. This type of stainless steel is known for its high machinability and good resistance to corrosion.

Due to its free-machining properties, it is often useful in the manufacturing of various components and parts, such as nuts, bolts, screws, and shafts. It is also used in the production of valves, pumps, and other types of machinery.

The addition of sulfur in this stainless steel improves its machinability, making it easier to cut and shape, resulting in faster production times and lower costs. Additionally, it has good resistance to corrosion, making it suitable for use in harsh environments.

Machinability & Welding

420F round bar is known for its excellent machinability, making it a popular choice for high-volume machining applications. This type of stainless steel contains sulfur, which helps break the chips that form during the machining process, making it easier to produce complex parts with tight tolerances.

The round bar can be machined using a variety of methods, including turning, milling, drilling, and grinding. However, it is important to note that this steel has a tendency to work-harden, which can make it more difficult to machine as the process continues. To combat this, it is recommended to use lower speeds and feeds when machining it.

When it comes to welding, 20f round bar is generally considered to be not weldable due to its high sulfur content. However, it is possible to weld this steel with certain techniques and procedures, such as using low heat input and preheating the material before welding. It is important to consult with a qualified welder or engineer before attempting to weld it to ensure proper technique and safety.


420F round bar is popular in industries that require high-volume machining and complex parts. Some of the common applications;

  • Machined Components: The steel round bar is helpful in the manufacturing of precision components that require high-volume machining. These components are in a variety of industries, such as automotive, aerospace, and medical.
  • Pump Shafts: Due to its excellent corrosion resistance and high machinability, it is popular in the manufacturing of pump shafts. These shafts are helpful in chemical processing, food processing, and wastewater treatment.
  • Valves: It is useful in the manufacturing of valves that require excellent corrosion resistance and high strength. These valves have a variety of applications, such as oil and gas, chemical processing, and water treatment.
  • Fasteners: It is helpful in the manufacturing of fasteners, such as bolts, nuts, and screws. These fasteners are in a variety of applications, such as automotive, construction, and aerospace.
  • Surgical Instruments: It is helpful in the manufacturing of surgical instruments due to its excellent corrosion resistance and biocompatibility. These instruments are present in a variety of medical procedures, such as orthopedic surgery, neurosurgery, and plastic surgery.


Yield strength 

Tensile strength 

Poisson’s ratio 

Elastic modulus 

55100 psi

95000 psi


27557– 30458 ksi

Chemical Properties








Molybdenum 0.60








Buy 420f Stainless from The Best Supplier

If you are looking for high-quality and durable stainless steel, then 20f round bar is an excellent choice. It offers good corrosion resistance, excellent weldability, and can be polished to a high-gloss finish. The steel is popular in the manufacturing of cookware, cutlery, cooking utensils, water heaters, and boilers due to its resistance to corrosion.

20f round bar is a cost-effective solution for those seeking corrosion resistance without the expense of more expensive grades. O’Hare Precision Metals is a top supplier of stainless steel in the United States. Our state-of-the-art facility produces a wide range of metal products, including custom items, to meet the needs of industrial, commercial, and residential clients. Trust O’Hare Precision Metals for all your steel needs.

Want to know more about 20f round bar? Just contact a highly skilled personnel from O’Hare Precision Metals. We are dedicated to providing smooth-flow service. Request a quote for stainless round bar stocks!