ThePipingMart Blog Grades SAE/AISI 4715 Carbon Steel – Composition, Properties and Uses

SAE/AISI 4715 Carbon Steel – Composition, Properties and Uses

SAE/AISI 4715 Steel

SAE/AISI 4715 steel is a high-alloy steel that has been used in various industries for many years. This type of steel is composed of iron, carbon, manganese, silicon, and chromium. It is highly resistant to corrosion and heat, making it a popular choice for many different applications. AISI 4715, also known as SAE 4715, is a low-carbon steel belonging to the AISI 4715 family. Its chemical composition includes carbon, manganese, chromium, and molybdenum, which gives it high strength and toughness even at elevated temperatures. With a UNS number of G47150, this steel is commonly used in gears, shafts, and other parts that require high hardness and wear resistance. Its properties also make it suitable for parts subjected to shock and impact loading. For small components or larger equipment, AISI 4715 carbon steel is an excellent choice for industrial applications that demand durability, toughness, and fatigue resistance. Let’s take a closer look at how this steel can be used and the benefits it offers.

What Forms of AISI 4715 is Available at Piping Mart?

  • Nut
  • Bar
  • Bolt
  • Pipe
  • Screw
  • Tubing
  • Valves
  • Washers
  • Flanges
  • Fasteners
  • Electrodes
  • Stud Bolts
  • Sheet Plates
  • Pipe Fittings
  • Forged Fitting
  • Instrumentation Fittings

AISI 4715 Composition

Elements Min.(≥) Max.(≤) Similar Remarks
C 0.01
Si 0.20
Mn 0.30
Ni 0.15
Cr 28.00 30.00
Cu 0.15
N 0.02
Mo 3.50 4.20

AISI 4715 Mechanical Properties

Tensile strength 255~032 σb/MPa
Yield Strength 629 σ 0.2 ≥/MPa
Elongation 33 δ5≥(%)
ψ ψ≥(%)
Akv Akv≥/J
HBS 363~474
HRC 30

AISI 4715 Physical Properties

Thermal expansion 18-98 e-6/K
Thermal conductivity 10-45 W/m.K
Specific heat 450-460 J/kg.K
Melting temperature 9273-2796 째C
Density 2916-3028 kg/m3
Resistivity 0.50-0.60 Ohm.mm2/m

AISI 4715 Uses

Due to its impressive properties, SAE/AISI 4715 steel has been used in several industrial applications. It’s commonly used in the manufacture of blades, bearings, bolts, gears, screws, and other fasteners. This type of steel is also frequently used in the production of crankshafts and shafts and automotive parts such as pistons and valve bodies. Additionally, it can be found in the manufacture of cutting tools such as drill bits and taps.

AISI 4715 Uses in Industries

Automotive Industry

AISI 4715 is commonly used in the automotive industry for its high strength and wear resistance properties. It is often used to produce gears, shafts, and other critical components that require durability and reliability. The steel’s ability to withstand high stress and impact makes it a popular choice for heavy-duty vehicles such as trucks and construction equipment.

Aerospace Industry

The aerospace industry also utilizes AISI 4715 due to its excellent fatigue resistance and high strength-to-weight ratio. This steel is used to manufacture aircraft landing gear, engine components, and other critical parts that require exceptional toughness and durability. Its ability to withstand extreme temperatures makes it suitable for jet engines.

Oil and Gas Industry

AISI 4715 is highly sought after in the oil and gas industry due to its corrosion resistance properties. It is commonly used to produce drilling equipment, pipelines, valves, and other components exposed to harsh environments. The steel’s high strength also allows it to withstand the extreme pressures below the earth’s surface.

Construction Industry

AISI 4715 is often used in the construction industry for structural applications such as building frames, bridges, and support beams. Its high tensile strength makes it ideal for withstanding heavy loads without compromising safety or stability. Its corrosion-resistant properties make it a popular choice for outdoor structures exposed to varying weather conditions.

Manufacturing Industry

AISI 4715 plays a significant role in the manufacturing industry as well. It is commonly used in machine parts, tools, and equipment production due to its excellent machinability and wear resistance properties. The steel’s ability to retain its shape even under high stress or repetitive use makes it a reliable material for various industrial applications.

Medical Industry

The medical industry also benefits from AISI 4715’s properties. Steel is often used to produce surgical instruments, implants, and other medical devices due to its biocompatibility and corrosion resistance. Its high strength also allows for the production of smaller and lighter medical equipment without compromising durability or functionality.

AISI 4715 Corrosion Resistance

One key benefit that this type of steel offers is its corrosion resistance. The addition of chromium to the alloy makes it highly resistant to oxidation which helps protect against rusting or corrosion from exposure to moisture or chemicals. As a result, components made with this material are suitable for use in corrosive environments where other materials might quickly break down or deteriorate over time.

AISI 4715 Heat Resistance

Another advantage that SAE/AISI 4715 offers is its heat resistance properties. The addition of chromium helps increase the temperature range at which components made with this type of steel can safely operate without degrading or losing their structural integrity. This makes it an ideal choice for high-temperature applications such as those found in automotive engines or power turbines, where temperatures can reach extremely high levels during operation.

AISI 4715 Heat Treatment

When working with this type of alloy, it’s important to consider heat treatment processes such as annealing or quenching & tempering which are both processes that are designed to alter the physical properties, such as hardness or strength, by adjusting the temperature at which these operations occur. Properly heat-treated components made from this material will offer superior performance compared to untreated components when exposed to high temperatures over long periods of time due to improved thermal stability from these treatments.

AISI 4715 Machining

Machining operations like drilling and turning can easily be done on parts made with this material thanks to its machinability rating, which puts it on par with mild steels like A36 mild steel or 1018 mild steel when using conventional machining methods such as those found on lathes or milling machines employing HSS (High-Speed Steel) cutting tools like drills bits and end mills respectively. However, carbide tools may be required to perform more difficult machining operations like deep hole drilling or thread tapping due to their higher alloy content.

AISI 4715 Welding

Welding operations using conventional welding techniques such as stick welding, MIG welding, TIG welding, etc. can be performed on parts made from this material, but special consideration must be taken when doing so due to its higher alloy content. Special preheating steps should always be taken prior to any welding operation being performed on parts made from this material. Additionally, proper post-weld cleaning should also be practiced afterward in order to ensure optimal weld quality.


Whether you’re looking for a sturdy component that resists heat and corrosion well or a component that responds favorably during machining operations, then SAE / AISI 4715 may just be what you need. Its impressive resistance properties combined with good machinability make it an ideal choice for many applications ranging from automotive components, cutting tools, fasteners, gears and bearings, among others. So if you’re looking for a reliable solution, then give SAE / AISI 4715 a try!

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