1.6580 / 30CrNiMo8+QT

30CrNiMo8+QT / 1.6580 – High-Strength Alloy Steel for Extreme Load-Bearing Applications

30CrNiMo8+QT, also known as 1.6580, is a chromium-nickel-molybdenum alloy steel that has been quenched and tempered (QT) to provide outstanding strength, toughness, and fatigue resistance. This alloy is well-suited for heavy-duty applications where components are exposed to high loads, making it ideal for use in the automotive, machinery, and oil and gas industries.

Properties of 30CrNiMo8+QT

30CrNiMo8+QT is prized for its:

• Exceptional Tensile and Yield Strength – With QT treatment, this alloy achieves remarkable strength and durability, suitable for load-bearing components under extreme stress.
• Superior Toughness and Fatigue Resistance – Designed to resist fatigue and provide long-term reliability in high-stress applications.
• Good Machinability and Hardenability – This alloy is highly machinable and can be hardened further, making it ideal for complex parts requiring enhanced surface strength.

Applications of 30CrNiMo8+QT

Due to its robust properties, 30CrNiMo8+QT is widely used in:

• Heavy-Duty Shafts and Gears – Perfect for shafts, gears, and other components in heavy machinery and automotive systems that demand both strength and wear resistance.
• High-Strength Fasteners – Suitable for bolts, studs, and fasteners in sectors like construction, oil and gas, and power generation, where secure fastening under heavy loads is crucial.
• Structural and Mechanical Components – Applied in components such as crankshafts, spindles, and connecting rods where toughness and durability are essential.

WTE PowerSteel is a reliable global stockist and distributor of 30CrNiMo8+QT, delivering this high-performance alloy to industries worldwide. With a focus on quality and technical support, WTE PowerSteel provides expert guidance in selecting and processing 30CrNiMo8+QT to meet the demanding requirements of heavy-duty applications. Contact us to learn more about our worldwide distribution and how 30CrNiMo8+QT can enhance the strength and reliability of your projects.

Chemical Composition

The composition of 1.6580 / 30CrNiMo8+QT is designed to provide a balance of strength, toughness, and wear resistance:

Mechanical Properties (at Room Temperature)

Mechanical Properties (after Quenching and Tempering)

After quenching and tempering, as specified in EN 10269, 1.6580 exhibits enhanced mechanical properties:

Physical Properties

Heat Treatment

30CrNiMo8 is typically subjected to quenching and tempering processes, generally performed at temperatures between 550°C and 650°C, to achieve optimal mechanical properties.

Corrosion Resistance

While 1.6580 provides reasonable corrosion resistance in mild environments, it is recommended to implement surface treatments or protective coatings for enhanced performance in more aggressive environments.

Key Performance Features

• High Strength and Toughness: Offers exceptional tensile and yield strength, making it suitable for high-stress applications.
• Good Wear Resistance: The hardness of the alloy contributes to wear resistance, ideal for heavy-duty components.
• Versatile Applications: Commonly used in automotive, aerospace, and machinery applications, including gears, shafts, and structural components.
• Good Machinability: The alloy can be machined using standard methods, facilitating the production of complex geometries.

In summary, 1.6580 / 30CrNiMo8+QT is an excellent choice for applications requiring a combination of high strength, durability, and resistance to deformation under load, making it a critical material in industries where reliability and performance are essential.