DIFFERENCES BETWEEN 4140 STEEL AND 4150 STEEL

The naming structure

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.

DIFFERENCES

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.

WHEN TO USE

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 crankshafts, gears, collars, and machinery parts.

Fushun Special Steel LTD CO

Fushun Metal is a large special steel manufacturer and supplier. We are metal experts and have been providing quality customer service and products since 1998.

At Fushun Metal, we supply a wide range of metals for a variety of applications. Our products/stock includes: stainless steel, alloy steel, spring steel, tool steel, high speed steel, mould steel, nickel alloy.

Our hot rolled and cold rolled steel is available in a wide range of shapes including: bars, tubes, sheets and plates. We can cut metal to your exact specifications.

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