Materials / Compare
Magnesium AZ31B-H24 vs. DMLS 17-4PH Stainless Steel
Compare Magnesium AZ31B-H24 vs. DMLS 17-4PH Stainless Steel strength, stiffness, weight and thermal properties.
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|---|---|---|
| Mechanical | ||
| Yield strength | 220MPasourcetypical, H24, 0.5-6 mm, 0.2 % proof stress | 861MPasourcemean, as built, horizontal (N=72) |
| Ultimate tensile strength | 290MPasourcetypical, H24, 0.5-6 mm | 886MPasourcemean, as built, horizontal (N=72) |
| Elongation at break | 13%sourcetypical, H24, 0.5-6 mm, gauge 5.65√A | 19.9%sourcemean at break, as built, horizontal |
| Young's modulus (stiffness) | 44.8GPasourcetypical (handbook physical constant) | 197GPasourcebase material: wrought 17-4 PH, Condition H 900 (Cleveland-Cliffs) |
| Density | 1,769kg/m³sourcenominal | 7,790kg/m³sourcemean part density (ISO 3369) |
| Strength to weight | 124kN·m/kg13% higher | 110kN·m/kg |
| Stiffness to weight | 25.3MN·m/kg | 25.3MN·m/kg |
| Poisson's ratio | 0.35sourcetypical (handbook physical constant) | 0.272sourcebase material: wrought 17-4 PH, all conditions (Cleveland-Cliffs) |
| Shear modulus | 16.6GPa | 77.4GPa4.67x stiffer in shear |
| Bulk modulus | 49.8GPa | 144GPa |
| Speed of sound | 5,032m/s | 5,029m/s |
| Thermal | ||
| Thermal conductivity | 76.9W/m·Ksourcetypical (temper/temperature not stated) | 17.9W/m·Ksourcebase material: wrought 17-4 PH, Condition H 900, at 149 °C (Cleveland-Cliffs) |
| Thermal expansion | 26.8µm/m·Ksourcetypical (temperature range not stated) | 10.4µm/m·Ksourcemean 25-100 °C, ASTM E228, AFTER atmospheric heat treatment (as-built value not published) |
| 100 mm part over a 50 °C swing | 134µm growth | 52µm growth2.58x less |
| Specific heat | 1,040J/kg·Ksourcetypical | 460J/kg·Ksourcebase material: wrought 17-4 PH, Condition A, 0-100 °C (Cleveland-Cliffs) |
| Heats up and cools (diffusivity) | 41.8mm²/s8.37x faster | 5mm²/s |
| Thermal shock resistance | 9,159W/m1.67x more resistant | 5,474W/m |
| Max service temperature | 149°Csourcestated application limit | not sourced |
| Values for | AZ31B-H24 sheet 0.016-0.062 in., MIL-HDBK-5J Table 4.2.1.0(b) (AMS 4377); strengths are S-basis MINIMUMS | EOS StainlessSteel 17-4PH IndustryLine (powder 9011-0041), EOS M 290, 40 µm, default job 17-4PH_040_StainlessM291_100, as built, horizontal; ISO 6892 & ASTM E8M |
Every value links to the document that states it. "Not sourced" means no citable source states it (or only a specification minimum); figures computed from it are left out too.
DMLS 17-4PH Stainless Steel is 3D printed: its properties depend on build direction and print settings; these are typical values.
Questions
Is Magnesium AZ31B-H24 stronger than DMLS 17-4PH Stainless Steel?
DMLS 17-4PH Stainless Steel is stronger: its yield strength is 861 MPa against 220 MPa for Magnesium AZ31B-H24 (3.91x).
Which is lighter, Magnesium AZ31B-H24 or DMLS 17-4PH Stainless Steel?
Magnesium AZ31B-H24 is lighter: 1,769 kg/m³ against 7,790 kg/m³ for DMLS 17-4PH Stainless Steel.
Which is stiffer, Magnesium AZ31B-H24 or DMLS 17-4PH Stainless Steel?
DMLS 17-4PH Stainless Steel is stiffer: Young's modulus 197 GPa against 44.8 GPa for Magnesium AZ31B-H24, so the same part in DMLS 17-4PH Stainless Steel deflects less under the same load.
Which is lighter for the same job, Magnesium AZ31B-H24 or DMLS 17-4PH Stainless Steel?
For the same stiffness or strength: Magnesium AZ31B-H24 is lighter for a stiff beam (bending), stiff panel or plate, strong rod or tie, strong beam, strong panel or plate.
| Part that must be | Magnesium AZ31B-H24 | DMLS 17-4PH Stainless Steel |
|---|---|---|
| Stiff rod or tie (tension) | about equal | about equal |
| Stiff beam (bending) | lighter | 2.1x heavier |
| Stiff panel or plate | lighter | 2.69x heavier |
| Strong rod or tie | lighter | 13% heavier |
| Strong beam | lighter | 1.77x heavier |
| Strong panel or plate | lighter | 2.23x heavier |
For the same stiffness or strength, mass scales with density over stiffness (or strength) raised to a power set by how the part is loaded: 1 for a rod in tension, 1/2 for a beam in bending, 1/3 for a panel (the standard material-selection indices).
Which conducts heat better, Magnesium AZ31B-H24 or DMLS 17-4PH Stainless Steel?
Magnesium AZ31B-H24 conducts heat better: 76.9 W/m·K against 17.9 W/m·K for DMLS 17-4PH Stainless Steel.
Which expands less with temperature?
DMLS 17-4PH Stainless Steel expands less: 10.4 µm/m·K against 26.8 µm/m·K for Magnesium AZ31B-H24.
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