PowerSteel.eu CS and Alloy steel 1.6582 / 34CrNiMo6+QT

1.6582 / 34CrNiMo6+QT

On stock
Round Bars 20–100 mm
Quenched and tempered steel with high temperability and toughness thanks to the high chromium content. It can be quenched and tempered at high resistance values and offers hardness consistency and uniformity. Generally used for pinions and shafts. Has average machinability on tool machines. Can be nitrided at the quenched and tempered state to increase resistance to wear and the fatigue limit. Uses: Highly stressed components with large cross sections for aircraft, automotive and mechanical engineering, such as propeller shafts, connecting rods, gear shafts, crankshafts, landing gear components. Heavy forgings, such as rotors, shafts and discs. For economic performance under severe dynamic stresses, parts must be designed for optimum strength.
Certificate:
EN 10204-3.1 Europe Origin
Production:
Bright or hot rolled EN 10060
Tensile Strength Rm:
1040 – 1200 MPa
Yield Strength:
from 940 MPa
Working temperature:
Equivalent or similar:
AISI 4340, SAE 4340, G43400, SEW 310, SEW 550,30NCD8, ASTM A 29 4340, SNCM431, BS 823M30, 3KH3M3F, DIN EN 898-1 class 10.9 and DIN EN 898-2 class 10.0

About material

34CrNiMo6+QT / 1.6582 – High-Strength Alloy Steel for Heavy-Duty Applications

34CrNiMo6+QT, also known as 1.6582, is a chromium-nickel-molybdenum alloy steel that has been quenched and tempered (QT) for exceptional strength, toughness, and fatigue resistance. This alloy is ideal for high-stress applications in industries such as heavy machinery, automotive, and oil and gas, where durability and performance under extreme loads are essential.

Properties of 34CrNiMo6+QT

34CrNiMo6+QT is valued for its:

  • High Tensile and Yield Strength – With QT treatment, this alloy achieves exceptional strength and durability, making it suitable for components under heavy loads.
  • Excellent Toughness and Fatigue Resistance – The alloy provides high toughness and resists fatigue, ensuring reliability in applications exposed to cyclic stress.
  • Good Machinability and Hardening – 34CrNiMo6+QT is easily machinable and can be further hardened for applications requiring enhanced surface strength.

Applications of 34CrNiMo6+QT

Thanks to its robust properties, 34CrNiMo6+QT is widely used in:

  • Heavy-Duty Shafts and Gears – Ideal for components in heavy machinery, automotive drive systems, and gear systems where strength and wear resistance are critical.
  • High-Strength Fasteners – Used for bolts, studs, and fasteners in construction, power generation, and oil and gas sectors, where secure fastening under high loads is required.
  • Structural and Mechanical Components – Suitable for various mechanical parts, including spindles, crankshafts, and connecting rods, where toughness and durability are necessary.

WTE PowerSteel is a trusted global stockist and distributor of 34CrNiMo6+QT, supplying this high-performance alloy steel to industries worldwide. With a focus on quality and technical support, WTE PowerSteel provides expert guidance in selecting and processing 34CrNiMo6+QT to meet the rigorous demands of heavy-duty applications. Contact us to learn more about our worldwide distribution and the benefits of 34CrNiMo6+QT for your critical projects.

Chemical Composition

The composition of 1.6582 / 34CrNiMo6+QT is defined to ensure high strength, toughness, and wear resistance:

Element Percentage (%)
Carbon (C) 0.30 – 0.38
Silicon (Si) 0.10 – 0.40
Manganese (Mn) 0.50 – 0.80
Chromium (Cr) 1.00 – 1.40
Nickel (Ni) 1.40 – 1.80
Molybdenum (Mo) 0.15 – 0.30
Phosphorus (P) 0.025 max
Sulfur (S) 0.025 max
Vanadium (V) 0.10 max

Mechanical Properties (at Room Temperature)

Property Typical Value
Density 7.85 g/cm³
Tensile Strength 1000 – 1300 MPa
Yield Strength (0.2% offset) 800 – 1000 MPa
Elongation at Break 10 – 20%
Hardness 28 – 34 HRC
Modulus of Elasticity 210 GPa

Mechanical Properties (after Quenching and Tempering)

Following quenching and tempering, as specified in EN 10269, 1.6582 exhibits enhanced strength and toughness:

Property Typical Value
Tensile Strength 1100 – 1400 MPa
Yield Strength (0.2% offset) 900 – 1100 MPa
Impact Toughness (Charpy) > 40 J at -20°C

Physical Properties

Property Value
Thermal Conductivity 50 W/m·K
Electrical Resistivity 0.6 µΩ·m
Thermal Expansion 11.5 µm/m·°C
Specific Heat Capacity 490 J/kg·K

Heat Treatment

34CrNiMo6 is typically heat-treated through processes like quenching and tempering, usually performed at temperatures between 550°C and 650°C, to enhance its mechanical characteristics.

Corrosion Resistance

While 1.6582 provides reasonable corrosion resistance in mild environments, it is generally recommended to apply surface treatments or protective coatings for improved performance in more aggressive settings.

Key Performance Features

  • High Strength and Toughness: Provides exceptional tensile and yield strength, making it suitable for demanding applications.
  • Good Wear Resistance: The hardness of the alloy contributes to wear resistance, ideal for heavy-duty components and machinery.
  • Versatile Applications: Widely utilized in industries such as automotive, aerospace, and heavy machinery, including gears, shafts, and structural components.
  • Good Machinability: Machinable using standard methods, facilitating the production of complex geometries.

In summary, 1.6582 / 34CrNiMo6+QT is a superior choice for applications that demand a combination of high strength, durability, and resistance to deformation under load, making it a critical material in sectors where reliability and performance are paramount.

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+420 722 917 867
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