17-4PH, also known as UNS S17400, AMS 5604, DIN/EN 1.4542, and JIS SUS 630, is a precipitation-hardening stainless steel known for its high strength, excellent mechanical properties, and good corrosion resistance. It is commonly used in various high-performance applications due to its versatile characteristics.

This alloy is ideal for applications requiring a combination of strength, hardness, and resistance to corrosion and oxidation.

17-4PH Sheet | Plate

17-4PH sheets and plates are available in various thicknesses and sizes, making them suitable for aerospace, automotive, and industrial applications that require high strength and good corrosion resistance.

17-4PH Round Bar | Rod

Round bars and rods in 17-4PH are available in multiple diameters and lengths, suitable for precision machining and manufacturing parts that need to withstand high stresses and maintain toughness.

17-4PH Strip | Coil

Offered in strips and coils, 17-4PH is used for applications that require strong, flexible materials, such as in high-stress springs and components.

17-4PH Applications

• Utilized in critical aerospace components like landing gear, turbine blades, and structural parts due to its high strength and corrosion resistance.

17-4PH Properties

• Tensile Strength: Exhibits high tensile strength, typically around 1,200 MPa, making it suitable for demanding applications.
• Density: Approximately 7.8 g/cm³, providing a good strength-to-weight ratio.
• Thermal Conductivity: Moderate thermal conductivity suitable for various applications.
• Corrosion Resistance: Excellent resistance to oxidation and corrosion, particularly in marine and acidic environments.

Machining 17-4PH

• Cutting: Use high-speed steel or carbide tools for cutting. Precision cutting techniques such as laser or water jet cutting are recommended for detailed work.
• Drilling: Employ carbide drills for drilling 17-4PH. Proper cooling and lubrication are essential to prolong tool life and achieve accurate holes.
• Turning: Carbide inserts are preferred for turning. Maintain consistent cutting speeds and effective cooling to ensure optimal performance.
• Milling: Use carbide end mills with adequate cooling to manage heat and maintain precision during milling operations.
• Grinding: For grinding, use aluminum oxide or CBN wheels to achieve precise tolerances and a high-quality surface finish. Adequate cooling is necessary to prevent overheating and ensure dimensional accuracy.

Chemical Composition

• Copper (Cu): Min 3.00%, Max 5.00%
• Manganese (Mn): Max 1.00%
• Phosphorus (P): Max 0.04%
• Silicon (Si): Max 1.00%
• Nickel (Ni): Min 3.00%, Max 5.00%
• Carbon (C): Max 0.07%
• Sulfur (S): Max 0.03%
• Chromium (Cr): Min 15.00%, Max 17.50%
• Iron (Fe): Balance