Description
Overview Of 17-4PH
17-4PH is a precipitation hardening martensitic stainless steel powder widely used in additive manufacturing across aerospace, medical, automotive, and general engineering sectors. It offers an excellent combination of high strength, good corrosion resistance, and weldability.
Powder Chemical Composition(wt,-%)
| Element | C | Cr | Ni | Cu | Nb | Mo |
| 17-4PH | ≤0.03 | 15.5-17.5 | 3.00-5.00 | 3.00-5.00 | 0.15-0.45 | – |
| Element | Si | Mn | S | P | O | Fe |
| 17-4PH | ≤1.00 | ≤1.00 | ≤0.03 | ≤0.03 | ≤0.03 | Bal |
Physical Properties
|
Grade |
Size |
Particle size distribution | Hall flow
rate |
Bulk
density |
Tap
density |
||
| D10(μm) | D50(μm) | D90(μm) | |||||
| 17-4PH | ≥15 | 30-40 | ≤60 | ≤25s/50g | ≥4.0g/cm³ | ≥4.4g/cm³ | |
Mechanical Properties
| Grade | Hardness
(HRC) |
Tensile strength
(Ob/Mpa) |
Yield strength
(Opo.2/Mpa) |
Elongation at break(δ5/%) |
| 17-4PH | 32-42 | ≥1310 | ≥1175 | ≥13 |
Heat Treatment Recommendation
| Grade | Recommended HT solution |
| 17-4PH | 1040℃/2H+480C/4H |
Advantages
Additive Manufacturing (AM)
● Excellent powder flowability (15–53 μm particle size) enables use in SLM and DMLS processes for integrated complex structures.
Metal Injection Molding (MIM)
● High-precision molding of fasteners, gears, and small-batch parts with minimal material waste.
Cost-Effectiveness
● 30–50% lower light weighting costs compared to titanium alloys while maintaining high strength.
Primary Applications
Aerospace
● Turbine blades, landing gear components, and engine brackets due to its high-temperature strength (up to 300°C) and corrosion resistance.
● 3D printed custom parts for weight reduction and complex geometries.
Medical Industry
● Orthopedic implants (e.g., hip stems) and surgical instruments via metal injection molding (MIM), leveraging its biocompatibility (ASTM F138 compliant).
Chemical Processing & Oil & Gas
● Valves, pumps, and pressure vessels resistant to chloride-induced corrosion and acidic environments.
Automotive
● Gears, axles, and transmission components through AM and traditional machining.
Nuclear Engineering
● Waste storage containers and radiation-resistant parts due to its resistance to radiation-induced embrittlement.
