What Is 4140 Steel?
4140 steel is a versatile, low alloy with chromium, phosphorus, sulfur, molybdenum, and manganese. Its relatively high carbon content enables hardenability and heat treatment to achieve a wide range of strength levels. Aside from this, 4140 steel offers excellent toughness, wear resistance, and fatigue strength, making it a popular choice for applications that require high-performance materials. This includes axles, shafts, gears, and hydraulic parts.
4140 steel material
4140 Steel Properties
4140 steel applies in various CNC steel machining applications and sheet metal fabrication, owing to the elements that combine to provide its unique qualities. Below are some key 4140 steel properties:
High Tensile and Fatigue Strength
4140 steel has high tensile and fatigue strength, making it suitable for high-stress applications such as crankshafts, gears, and axles.
Excellent Hardness and Toughness
4140 steel is heat treatable to achieve high hardness levels of up to 58 HRC, making it ideal for various applications. Further, 4140 steel exhibits good toughness and impact resistance, which enables it to withstand high loads without breaking or cracking.
Good Corrosion Resistance
4140 steel exhibits good resistance to corrosion agents, particularly when compared to other alloy steels. This makes it a suitable material choice for components often exposed to harsh environments. However, keep in mind that 4140 is not as corrosion-resistant as stainless steel.
Bearbeitbarkeit
4140 steel is relatively easy to machine, especially in the annealed condition. However, it gets challenging for the machine when it becomes hardened.
What Is 4130 Steel?
4130 steel is also a low-alloy steel. This steel variant contains a relatively lower carbon content alongside other elements such as chromium, sulfur, silicon, molybdenum, manganese, and phosphorus. Combining these elements gives 4130 unique steel properties, including its high strength and toughness and excellent resistance to fatigue and corrosion. Hence, it is used in manufacturing various aerospace and other high-stress components.
4140 vs 4130 steel material,which one is better
4130 Steel Properties
4130 steel is applicable in various manufacturing operations due to its characteristics. Check the main 4130 steel properties below:
Hardness and Tensile Strength
Like 4140 steel, 4130 steel also offers excellent hardness and tensile strength, making it suitable for high-stress applications. 4130 steel has a higher strength-to-weight ratio than mild steel. Thus, this makes it ideal for manufacturing projects where weight is crucial.
Elastizität
4130 steel has high elasticity with a yield strength of up to 460 MPa. This means the material can withstand a considerably high strain and return to its original shape or conformation.
Dehnbarkeit
4130 steel has excellent ductility, particularly in its annealed state. Thus, this makes it easy to draw the steel variant into wires.
High Corrosion and Temperature Resistance
4130 steel also has superior resistance to corrosive elements and can withstand high temperatures without losing shape or integrity.
Differences Between 4130 And 4140 Steel
Steel alloys are available in different grades, each with unique properties and characteristics that make them suitable for specific applications. Two such grades of steel that are commonly compared are 4140 steel and 4130 steel.
milling 4130 steel part
These steel grades are low-alloy steels commonly used in various industries due to their high strength and toughness. However, there are some critical differences between these two types of steel. Let’s examine the differences below:
1. Composition
Like 1018 vs. 4140 steel, the primary difference between 4140 steel and 4130 steel is their chemical composition. Check the chemical composition of both steel grades below:
The chemical composition of 4140 steel is as follows:
Carbon: 0.38%-0.43%
Chromium: 0.8%-1.1%
Manganese: 0.75%-1.0%
Phosphorus: 0.035% (max)
Sulfur: 0.040% (max)
Silicon: 0.15%-0.35%
Molybdenum: 0.15%-0.25%
On the other hand, the chemical composition of 4130 steel includes the following:
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Chromium: 0.8%-1.1%
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Phosphorus: 0.035% (max)
Sulfur: 0.040% (max)
Silicon: 0.15%-0.35%
Molybdenum: 0.15%-0.25%
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2. Construction Industry
Construction industries also utilize 4140 steel for buildings and bridge components that require high strength and durability.
3. Aerospace Industry
Both 4140 and 4130 steel apply in the aerospace industry to manufacture aircraft parts, such as landing gear components, wings, aircraft wings, engine parts, and other structural parts.
4. Structural Tubing
4130 steel applies in manufacturing bicycle frames, motorcycle frames, sports equipment, and other structural tubing applications due to its high strength-to-weight ratio and good weldability.
XTJ Offers Quality 4140 And 4130 Steel Machining Services
Steel machining is perhaps one of the most engaged machining processes in several industries today. Lots of industries apply different steel grades for various manufacturing purposes. Nevertheless, some people find it tasking to settle on steel grade for a project due to their conflicting properties.
At XTJ, you can get the best professionals to carefully handle all stages of your machining steel projects. Additionally, our metal machining services comprise quality surface treatments to give your machined steel parts the best finish. For more information, contact our support service today, and you will get a free quote soon.
Fazit
4140 and 4130 steel are low alloy steel grades with excellent strength, toughness, and corrosion resistance. As a result, they still apply across various industries today for many manufacturing purposes. While 4140 and 4130 share some similarities, there are also some significant differences between these two types of steel. Understanding the characteristics and differences between these steel grades remains the best step to selecting the correct steel for your manufacturing project.
Which type of steel is better, 4140 or 4130 steel?
In terms of which one is better, it depends on the specific application and the requirements of that application. Ultimately, consulting with a materials engineer or a part manufacturer is essential to determine the best type of steel for a particular application.
Will 4140 steel rust?
4140 steel, which includes nickel, chromium, and molybdenum, increases passivation and, as a result, enhances corrosion resistance. Thus, this steel remains suitable for manufacturing parts subjected to harsh corrosive conditions.
