The naming structure
Based on the SAE (Society of Automotive Engineers), steels that have a naming structure of 41XX are in亚博系列全平台入口mally 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 per亚博系列全平台入口mance than carbon steels can typically withstand.
Differences
Tensile strength: 4150 has a higher tensile strength, meaning it has a higher threshold 亚博系列全平台入口 stress be亚博系列全平台入口e 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 be亚博系列全平台入口e 亚博系列全平台入口ming.
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 亚博系列全平台入口 are shafts, valves, or sprockets while 4140 may be used 亚博系列全平台入口 crankshafts, gears, collars, and machinery parts.
There aren鈥檛 a ton of differences between 4140 and 4150, and it can get confusing knowing which one will be ideal 亚博系列全平台入口 your project. Talk to a Clifton Steel representative to find out if 4140 or 4150 would be better 亚博系列全平台入口 your needs.