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Grade: 17-7PH
Formula: Fe/Cr 17/Ni 7
Form: Disk
Material: Stainless Steel
Commodity: Alloys
17-7PH Stainless Steel Disk is a precipitation-hardening stainless steel offering high tensile strength, excellent fatigue resistance, and good corrosion resistance, even in challenging environments. In disk form, it provides dimensional stability and reliable performance under cyclic and high-load conditions. This alloy is extensively used in aerospace, petrochemical, and precision instrumentation applications, where long-term mechanical stability is critical. Specific uses include aerospace actuator components, spring diaphragms, and corrosion-resistant fastener systems. Its ability to undergo specialized heat treatments enables fine-tuning of hardness and ductility for targeted performance profiles. Research continues to refine its surface properties—such as through plasma nitriding—to enhance wear resistance while preserving corrosion protection. By combining strength, resilience, and versatility, it remains an essential material for advanced engineering solutions and innovative industrial designs.
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Tolerances

Disc
Thickness >0.05mm ±10%
Thickness <0.01mm ±25%
Thickness 0.01mm - 0.05mm ±15%

Material Properties for Alloys

Mechanical Properties
Element Value
Elongation at break( % ) <25
Modulus of elasticity( GPa ) 214
Izod impact strength( J m⁻¹ ) 61-115
Tensile strength( MPa ) 1020-1550
Electrical Properties
Element Value
Electrical resistivity( µOhmcm ) 80-85
Thermal Properties
Element Value
Melting point( C ) 1435
Thermal conductivity( W m⁻¹ K⁻¹ ) 16.7@23°C
Coefficient of thermal expansion( x10⁻⁶ K⁻¹ ) 15.3@20-90°C
Physical Properties
Element Value
Density( gcm⁻³ ) 7.81

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