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1.7225 QT (42CrMo4) Quenched Steel
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1.0718 11SMnPb30

1.8159 (51CrV4) Spring Steel

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Description

1.8159 (51CrV4) is a high-grade spring steel material. It has a high carbon content, which gives it excellent hardness and wear resistance, and a chromium-vanadium alloy composition that provides high strength and toughness. It also has good fatigue resistance and impact strength, making it suitable for applications where high dynamic stresses are involved.

This material can be heat treated to achieve the desired mechanical properties, such as hardness, strength, and toughness. It is typically supplied in a hardened and tempered condition, which means that it has already undergone a quenching and tempering process to achieve the desired hardness and toughness levels.

1.8159 (51CrV4) is commonly used in the production of various types of springs, as well as other high-strength components, such as gears and crankshafts. It is also used in the automotive industry for the production of valve springs, suspension springs, and clutch springs, as well as in the machinery and aerospace industries for similar applications.

Application Areas

Application Areas

  1. Springs: This material is commonly used in the production of various types of springs, such as valve springs, suspension springs, and clutch springs. Its excellent combination of hardness, strength, and toughness makes it ideal for applications where high dynamic stresses are involved.
  2. Gears and crankshafts: 1.8159 (51CrV4) spring steel is also used in the production of high-strength components such as gears and crankshafts. Its high strength and wear resistance make it suitable for use in applications where high stress and heavy loads are involved.
  3. Automotive industry: In the automotive industry, this material is commonly used for the production of valve springs, suspension springs, and clutch springs. It is also used for other components that require high strength and wear resistance, such as camshafts and crankshafts.
  4. Machinery industry: This material is used in various components of machinery, such as torsion bars, shafts, and couplings. Its high strength and toughness make it suitable for applications where heavy loads and high stress are involved.
  5. Aerospace industry: 1.8159 (51CrV4) spring steel is also used in the aerospace industry for applications that require high strength and toughness, such as landing gear components, springs, and fasteners.
Technical Details

Technical Details

CHEMICAL COMPOSITION

Element Composition (%)
C 0.47-0.55
Si 0.15-0.40
Mn 0.70-1.10
P 0.025 max
S 0.025 max
Cr 0.90-1.20
V 0.10-0.25

Note: This table is based on typical ranges and may vary slightly depending on the manufacturer or supplier.

HEAT TREATMENT

Heat Treatment Process Temperature Range Cooling Method
Annealing 680-720°C Furnace
Slow Cool in Furnace to 620°C
Air Cool
Hardening Preheat: 650-700°C Quench: 830-870°C
Tempering Reheat: 300-650°C Air Cool

Note that specific heat treatments may vary depending on the manufacturer and intended application. It is important to consult the manufacturer’s recommendations for the specific material and application in question.

MECHANICAL PROPERTIES

Property Value
Tensile strength (Rm) 1100-1400 MPa
Yield strength (Rp0.2) 900-1200 MPa
Elongation (A) 7-14%
Reduction in area (Z) 20-40%
Modulus of elasticity 200-210 GPa
Hardness (HB) 320-360 HB

Note that these values are for reference only and may vary depending on factors such as heat treatment, manufacturing process, and testing method. It is important to consult the manufacturer’s datasheet for the specific material and application in question.

PHYSICAL PROPERTIES

Physical Property Value
Density 7.85 g/cm3
Melting point 1420-1460°C
Thermal expansion coefficient 11.7 x 10^-6/K
Specific heat capacity 460 J/(kg·K)
Thermal conductivity 46.6 W/(m·K)
Electrical resistivity 0.20-0.25 x 10^-6 Ωm

Note that the values listed in this table are approximate and may vary depending on the specific manufacturing process and composition of the steel.