SAE 4140, DIN: 1.7225, EN: 42CrMo4, ASTM: A519 & SAE 4150, DIN: 1.7227, EN: 50CrMo4 Seamless Pipe

PRODUCT DESCRIPTION

PRODUCT TYPES

4140 & 4150 Seamless Pipes

Overview: 4140 and 4150 seamless pipes are high-performance alloy steel pipes, known for their strength, toughness, and ability to withstand extreme pressure and temperatures. These pipes are commonly used in applications where mechanical properties such as high tensile strength, fatigue resistance, and wear resistance are critical. Industries such as automotive, oil & gas, power generation, and manufacturing often rely on these seamless pipes for heavy-duty applications.

Mechanical Composition (in %)

Physical Properties

• Density: 7.85 g/cm³ (7850 kg/m³)
• Tensile Strength (Rm): 670–850 MPa
• Yield Strength (Rp0.2): 415 MPa (min)
• Elongation (A): ≥ 20% (for thickness up to 25 mm)
• Hardness (HB): 200–250

Machinability

4140 and 4150 seamless pipes offer excellent machinability due to their alloy composition, which provides a balance of strength and ductility. Both materials can be easily turned, drilled, and milled using standard machining practices. The slightly higher carbon content in 4150 pipes offers additional hardness and strength, which can be beneficial for specific high-stress applications.

Machining Tips:

• Use HSS or carbide cutting tools for best results.
• Moderate cutting speeds help minimize tool wear, especially when machining 4150 pipes.
• Proper cooling is essential to maintain tool life and prevent heat buildup.

Weldability

Both 4140 and 4150 seamless pipes are weldable, but due to their alloy content, preheating is typically recommended for thicker sections (over 30 mm). These pipes can be welded using standard methods, such as MIG, TIG, or arc welding, and are often used in heavy-duty applications where joint integrity is essential.

Welding Guidelines:

• Preheating is generally recommended for sections over 30 mm thickness.
• Use low-hydrogen electrodes for improved weld quality.
• Post-weld heat treatment is often required for thicker pipes to avoid cracking and to relieve internal stresses.

Usage Areas

4140 and 4150 seamless pipes are highly sought after in industries that demand superior strength, wear resistance, and the ability to handle extreme pressure and temperature conditions. Some of the primary applications include:

• Automotive Industry: For heavy-duty applications such as axles, suspension components, and gears.
• Oil and Gas Industry: Used in drill pipes, pipeline systems, and other components that require strength and durability in harsh conditions.
• Power Generation: For high-pressure steam and gas systems, as well as hydraulic piping systems.
• Heavy Equipment Manufacturing: For use in cranes, industrial machinery, and other equipment subjected to high mechanical stress.
• Aerospace: Certain aerospace components require the toughness and heat resistance offered by 4140 and 4150 pipes.

Industries Using 4140 & 4150 Seamless Pipes

• Automotive Industry: Used for drivetrain components, suspension systems, and structural parts.
• Oil and Gas Industry: For drilling, pipeline systems, and fluid transport in extreme conditions.
• Power Generation: Applied in high-pressure systems, such as steam lines and turbines.
• Heavy Equipment Manufacturing: For components subjected to high stress, such as hydraulic cylinders and shafts.
• Aerospace and Defense: For high-strength applications where toughness and fatigue resistance are critical.

Key Advantages of 4140 & 4150 Seamless Pipes

• High Tensile Strength: These pipes are ideal for high-stress, high-pressure applications.
• Excellent Weldability: Suitable for welding with standard methods, ensuring strong, durable joints.
• Outstanding Durability: Offers excellent resistance to wear, fatigue, and high-temperature environments.
• Versatility: Suitable for a wide range of industries, including automotive, oil & gas, power generation, and aerospace.
• Heat Resistance: Capable of withstanding extreme temperatures, making them ideal for demanding conditions.