17-4ph Stainless Steel Powder
Chemical composition
Chemical composition (nominal), % | ||||||||||
Fe |
C |
Cr |
Si |
Mn |
P |
S |
Cu |
Nb |
Mo |
Ni |
Bal. |
≤0.07 |
15.5-17.5 |
1 |
≤1.0 |
≤0.04 |
≤0.03 |
3.0-5.0 |
0.15-0.45 |
≤0.3 |
3.0-5.0 |
Physical properties
Wrought material, typical values | |
Density |
7.8 g/cm3 |
(0.28 lb/in3) | |
Thermal conductivity (H900 heat treatment tested at 149°C/ 300°F) |
17.9 W/mK |
Coefficient of thermal expansion* |
10.8 μm/m°K |
Melting range |
1,404–1,440°C |
(2,559–2,624°F) | |
*In the range of 21–93°C (70–200°F)
Mechanical properties
The typical mechanical properties of materials produced by Laser Powder Bed Fusion (L-PBF) in both as-built and heat-treated conditions were evaluated at room temperature, based on independent research. The heat treatment involved solution annealing at 1,051°C (1,924°F) for 1 hour in hydrogen, followed by aging at 482°C (900°F) for 1 hour in nitrogen.
Mechanical properties, metric units | ||||||
Condition |
Yield strength (Rp0.2), MPa |
Tensile strength (Rm), MPa |
Elongation (A), % |
Hardness, HV (HRC)* |
Density, g/cc |
Density, % |
As built |
860 |
905 |
20 |
230 (22) |
7.7 |
99 |
Heat treated |
1,116 |
1,358 |
5.1 |
450 (45) |
7.7 |
99 |
Mechanical properties, imperial units | ||||||
Condition |
Yield strength (Rp0.2), ksi |
Tensile strength (Rm), ksi |
Elongation (A), % |
Hardness, HRC* |
Density, lb/in3 |
Density, % |
As built |
125 |
131 |
20 |
230 (22) |
0.28 |
99 |
Heat treated |
162 |
197 |
5.1 |
450 (45) |
0.28 |
99 |
*Typical Vicker’s Hardness levels (ASTM E92, ISO 6507-1, JIS Z2244, GB/T 4340.1) as well as HRC values (ASTM E18, ISO 6508-1, JIS Z2245, GB/T 230) in the Laser - Powder Bed Fusion (L-PBF) as-built and heat-treated conditions.
Particle size distribution
CMI metal powders for additive manufacturing (3D printing, rapid prototyping) are offered in a variety of particle size distributions, customized to suit specific additive manufacturing systems. These powders can also be tailored to meet the unique requirements of the final application, including mechanical performance and surface finish.
Typical particle size distributions for additive manufacturing | |
Process technology |
Size (µm) |
Binder jetting |
≤ 16, ≤ 22, ≤ 32, ≤ 38, ≤ 45 |
Laser - Powder Bed Fusion (L-PBF) |
15 to 53 and 10 to 45 |
Electron beam - Powder Bed Fusion (E-PBF) |
45 to 106 |
Direct Energy Deposition (DED) |
53 to 150 |
Powder characteristics and morphology
CMI metal powders for additive manufacturing (3D printing, rapid prototyping) feature a spherical morphology and high packing density, which provide excellent flow properties. These characteristics are crucial for powder bed processes, as they help apply fresh powder layers evenly to the bed, ensuring consistent and uniform part builds.
In blown powder processes, good flowability ensures uniform build rates. Precise control over the particle size distribution further enhances flow properties. Low-oxygen powders contribute to clean microstructures and minimal inclusion levels in the final parts.