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17-4 PH
17-4 PH Stainless steel
Engineered Strength with Corrosion Resistance Built In
​High-Strength, Precipitation-Hardened Stainless for Medical, Aerospace, and Industrial Applications
17-4 PH (UNS S17400) is a precipitation-hardened martensitic stainless steel offering an excellent balance of high strength, corrosion resistance, and machinability. It can be heat-treated to various conditions (H900, H925, H1025, etc.), each offering specific mechanical properties for precision applications.
In the medical industry, 17-4 PH is widely used for surgical tools, orthopedic instruments, and components requiring dimensional stability and durability under stress. Available to meet ASTM A564, AMS 5643, and ASTM F899 specifications.
Key Features
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​​High tensile and yield strength, especially in aged conditions (H900, H925, etc.)
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Good corrosion resistance in body fluids and sterilization environments
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Excellent dimensional stability and machinability
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Magnetic and suitable for load-bearing applications
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Can be hardened to meet specific strength requirements
Chemical Composition
Element
Carbon (C)
Manganese (Mn)
Phosphorus (P)
Sulfur (S)
Silicon (Si)
Chromium (Cr)
Nickel (Ni)
Molybdenum (Mo)
Copper (Cu)
Niobium (Nb + Ta)
Iron (Fe)
Percentage
≤ 0.07%
≤ 1.00%
≤ 0.040%
≤ 0.030%
≤ 1.00%
15.00 – 17.50%
3.00 – 5.00%
2.25 - 3.00%
3.00 – 5.00%
0.15 – 0.45%
Balance
Note: May vary slightly depending on melt source and form (wire or bar).
Common Heat Treat Conditions
Condition
Tensile Strength (ksi)
Yield Strength (ksi)
Hardness (HRC)
H900
H925
H1025
H1075
H1150
~190
~180
~155
~140
~130
~170
~160
~145
~130
~115
44
42
38
35
30
Values are approximate and vary based on product form and process.
Material Solutions
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DFARS & Domestic Melt
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Custom sizes, length and finishes
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Diameters from 0.0254mm to 25.4mm (0.001" to 1.00")
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Lengths from 152.4mm to 3657.6m (6.00" to 144")
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​Ground & Polished finishes 8 RA or better
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Diameter tolerance as tight as ±0.0001​
Applications
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Orthopedic and trauma device components
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Surgical tools and reamers
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Dental and veterinary instruments
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Instrument housings and handles
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High-strength fastening and clamping elements
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