About 17 7 PH Spring Wire

17-7 PH spring wire is a precipitation-hardening stainless steel wire known for its excellent combination of high strength, corrosion resistance, and elasticity. Commonly used in aerospace, automotive, and medical industries for springs and components requiring superior mechanical properties and durability in demanding environments.

 

17 7 PH Spring Wire chemical compositions

The chemical composition of 17-7 PH spring wire typically includes:

  • Chromium (Cr): 16.0-18.0%
  • Nickel (Ni): 6.5-7.75%
  • Aluminum (Al): 0.75-1.5%
  • Carbon (C): 0.09% maximum
  • Manganese (Mn): 1.00% maximum
  • Silicon (Si): 1.00% maximum
  • Phosphorus (P): 0.04% maximum
  • Sulfur (S): 0.03% maximum
  • Iron (Fe): Balance

This composition provides the wire with exceptional strength, corrosion resistance, and precipitation hardening properties, making it suitable for various demanding applications.

 

17 7 PH Spring Wire physical properties

The physical properties of 17-7 PH spring wire typically include:

  1. Density: Approximately 7.8 g/cm³.
  2. Melting Point: Around 1400-1425°C (2550-2600°F).
  3. Tensile Strength: Typically ranging from 1275 to 1550 MPa (185,000 to 225,000 psi).
  4. Elongation: Usually between 1% to 12%. This measures the percentage increase in length a material can undergo before breaking under tension.
  5. Modulus of Elasticity: Approximately 193 GPa (28 x 10^6 psi). This represents the stiffness or rigidity of the material; it measures the amount of deformation a material experiences in response to an applied force.
  6. Hardness: Typically in the range of 388 to 444 HB (Brinell Hardness). This indicates the resistance of the material to indentation or scratching.

These properties make 17-7 PH spring wire suitable for applications where high strength, corrosion resistance, and elasticity are required, such as in aerospace, automotive, and medical industries.

 

17 7 PH Spring Wire mechanical properties

The mechanical properties of 17-7 PH spring wire typically include:

  1. Tensile Strength: Typically ranging from 1275 to 1550 MPa (185,000 to 225,000 psi). This measures the maximum amount of tensile (stretching) stress a material can withstand before breaking.
  2. Yield Strength: Typically around 1170 to 1520 MPa (170,000 to 220,000 psi). This is the stress at which a material begins to deform plastically without any increase in the load.
  3. Elongation: Usually between 1% to 12%. This measures the percentage increase in length a material can undergo before breaking under tension.
  4. Modulus of Elasticity: Approximately 193 GPa (28 x 10^6 psi). This represents the stiffness or rigidity of the material; it measures the amount of deformation a material experiences in response to an applied force.
  5. Hardness: Typically in the range of 388 to 444 HB (Brinell Hardness). This indicates the resistance of the material to indentation or scratching.

These mechanical properties make 17-7 PH spring wire suitable for applications requiring high strength, corrosion resistance, and resilience, such as in aerospace, automotive, and medical devices.

 

17 7 PH Spring Wire Applications

17-7 PH spring wire finds applications in various industries where its exceptional mechanical properties are advantageous. Common applications include:

  1. Aerospace: Used in components like springs, fasteners, and structural elements due to its high strength-to-weight ratio and corrosion resistance.
  2. Automotive: Employed in automotive suspension systems, engine valve springs, and transmission components due to its high tensile strength and corrosion resistance.
  3. Medical: Utilized in medical devices such as surgical instruments, orthopedic implants, and dental instruments due to its biocompatibility and resilience.
  4. Oil and Gas: Used in downhole tools, valve springs, and wireline applications due to its resistance to corrosion and high pressure environments.
  5. Marine: Employed in marine equipment and offshore structures due to its corrosion resistance and ability to withstand harsh environments.
  6. Industrial Machinery: Utilized in various machinery and equipment for springs, wire forms, and fasteners due to its durability and reliability.
  7. Electronics: Used in electronic connectors, switches, and sensors requiring high strength and resistance to corrosion.
  8. Sporting Goods: Employed in sports equipment such as fishing rods, golf clubs, and bicycle components due to its resilience and durability.

These applications demonstrate the versatility and reliability of 17-7 PH spring wire across a wide range of industries.