The Difference Between 4140 Steel And 4150 Steel

The Difference Between 4140 Steel And 4150 Steel

Based on the SAE (Society of Automotive Engineers), steels that have a naming structure of 41XX are informally known as chromoly steel, or it is a chromium-molybdenum steel. These steels are usually much harder and tougher than normal carbon steel. Alloying elements allow the steel to be heat treated to obtain stronger physical properties. The last two digits are how much carbon is in the steel. In the case of 4140, there is .40% carbon and 4150 has a .50% carbon content.

These are both extra strong and hard alloys of steel, and are used in applications requiring higher performance than carbon steels can typically withstand.

Tensile strength: 4150 has a higher tensile strength, meaning it has a higher threshold for stress before breaking.

Ductility & workability: 4140 is more ductile, meaning it can be bent easier than 4150. It also can be used in cold working conditions while 4150 needs to be thermally treated before forming.

These types of steel are typically used in industries such as aerospace, defense, underground mining, oil and gas, or automotive. Some of the products you might use 4150 for are shafts, valves, or sprockets while 4140 may be used for cylinder rod, crankshafts, gears, collars, and machinery parts.

As a professional 4140 steel products manufacturer and supplier, Anbao Hydraulic has been supplying and exporting 4140 hard chrome bar,4140 cylinder bareel  for almost 23 years, Any inquiries and problems please feel free to send emails to us via, we will reply you within 1 working day.

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