Material Data Sheet Steel.pdf
420 Stainless Steel Infiltrated with Bronze
ExOne’s 3D Printed 420 Stainless Steel infiltrated with Bronze is a matrix material composed of 60% stainless steel and 40% bronze infiltrant. This material offers good mechanical properties, is available in both an annealed and non-annealed condition, is able to be machined, welded and polished, and offers excellent wear resistance.
Applications
420 SS / Bronze
This material system is ideally suited for parts exposed to highly abrasive environments such as pump components, and parts for down-hole drilling and mining equipment. Additional applications include industrial components, molds, tooling, art objects and decorative hardware.
Composition
Stainless Steel: Alloy 420
Bronze: 90% Cu / 10% Sn
Printing
Using binder jetting technology, ExOne’s state-of-the-art 3D Printing machines produce parts directly from CAD models by precisely controlling the jetting of binder onto a powder bed, and then subsequently spreading new layers of powder. This process is repeated until the part is completed. This 3D Printing process offers increased design flexibility, reduced manufacturing cost and shortened lead times.
After printing is complete, the parts are cured in an oven, which enables the parts to be handled. After curing,
Typical Material Properties
| Material Properties | Test Method | 420SS/Bronze | ||
|---|---|---|---|---|
| Material Properties | Test Method | Annealed | Non-Annealed | |
| Tensile Strength | ASTM E8 | |||
| Ultimate Strength | ASTM E8 | 72 ksi(496MPa) | 99ksi(682MPa) | |
| Yield Strength(0.2%offset) | ASTM E8 | 62ksi(427MPa) | 66ksi(455MPa) | |
| Elastic Modulus | ASTM E8 | 21.4 Mpsi(147GPa) | 21.4 Mpsi(147GPa) | |
| Elongation | ASTM E8 | 7.0% | 2.3% | |
| Hardness | ASTM E18 | 93HRb | 97HRb | |
| Fractional Density | MPIF42 | 95%+ | 95%+ | |
| Density | MPIF42 | 0.284lbs/in³(7.86g/cm³) | 0.284lbs/in³(7.86g/cm³) | |
| Machinability | MPIF42 | Conventionally machinable | Refer to ExOne for recommendations | |
| Weldability | MPIF42 | Use silicone bronze rod&TIG weld | Use silicone bronze rod&TIG weld | |
| Thermal Conductivity | MPIF42 | ASTM E1530 | 13BTU/hrft°F(22.6W/m²K) | 13BTU/hrft°F(22.6W/m²K) |
| Specific Heat | ASTM E1263 | 0.114BTU/lb°F(478J/kg²K) | 0.114BTU/lb°F(478J/kg²K) | |
| Thermal Expansion Coefficient | ASTM E228 | 7.4x10⁻⁶/°F(13.4x10⁻⁶/°K) | 7.4x10⁻⁶/°F(13.4x10⁻⁶/°K) |
Surface Finish
After sintering: ≈ 600 μin R (15 μm R)
Bead blasting: ≈ 300 μin R (7.5 μm R)
Barrel finishing: ≈ 50 μin R (1.25 μm R)
For information about ExOne systems, materials and applications, contact an ExOne Production Service Center or visit www.ExOne.com
The ExOne Company
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North Huntingdon, PA 15642
The data and other information (Information) presented in this Data Sheet are provided by and are proprietary information of The ExOne
Company (ExOne). ExOne presents this Information in the good faith belief that it is substantially accurate as of the date provided on this
document. The Information is based upon utilizing ExOne’s 3D printing machines and proprietary processes and technology. The material
properties included in the Information are representative of materials so processed and do not constitute minimum specification standards.
Materials processed on machines other than ExOne’s and/or with different processes and/or technology may differ as to their properties.
ExOne’s research and developments efforts are ongoing and ExOne reserves the right to revise the information at any time without notice.
ExOne does not provide any warranties or other obligations hereby, and will only provide such warranties or other obligations, if any, either
in a definitive purchase contract executed by ExOne or in its standard terms and conditions of sale contained in an order acknowledgement.
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