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Grade 250 Maraging Steel vs. S31730 Stainless Steel

Both grade 250 maraging steel and S31730 stainless steel are iron alloys. They have 76% of their average alloy composition in common. There are 24 material properties with values for both materials. Properties with values for just one material (8, in this case) are not shown.

For each property being compared, the top bar is grade 250 maraging steel and the bottom bar is S31730 stainless steel.

Metric UnitsUS Customary Units

Mechanical Properties

Elastic (Young's, Tensile) Modulus, GPa 190
200
Elongation at Break, % 7.3 to 17
40
Poisson's Ratio 0.3
0.28
Shear Modulus, GPa 75
77
Shear Strength, MPa 600 to 1060
370
Tensile Strength: Ultimate (UTS), MPa 970 to 1800
540
Tensile Strength: Yield (Proof), MPa 660 to 1740
200

Thermal Properties

Latent Heat of Fusion, J/g 270
290
Melting Completion (Liquidus), °C 1480
1430
Melting Onset (Solidus), °C 1430
1390
Specific Heat Capacity, J/kg-K 450
470
Thermal Expansion, µm/m-K 12
16

Otherwise Unclassified Properties

Base Metal Price, % relative 32
24
Density, g/cm3 8.2
8.0
Embodied Carbon, kg CO2/kg material 4.9
4.6
Embodied Energy, MJ/kg 65
63
Embodied Water, L/kg 140
180

Common Calculations

PREN (Pitting Resistance) 16
30
Resilience: Ultimate (Unit Rupture Work), MJ/m3 130 to 150
170
Stiffness to Weight: Axial, points 13
14
Stiffness to Weight: Bending, points 23
24
Strength to Weight: Axial, points 33 to 61
19
Strength to Weight: Bending, points 26 to 40
18
Thermal Shock Resistance, points 29 to 54
12

Alloy Composition

Aluminum (Al), % 0.050 to 0.15
0
Boron (B), % 0 to 0.0030
0
Calcium (Ca), % 0 to 0.050
0
Carbon (C), % 0 to 0.030
0 to 0.030
Chromium (Cr), % 0
17 to 19
Cobalt (Co), % 7.0 to 8.5
0
Copper (Cu), % 0
4.0 to 5.0
Iron (Fe), % 66.3 to 71.1
52.4 to 61
Manganese (Mn), % 0 to 0.1
0 to 2.0
Molybdenum (Mo), % 4.6 to 5.2
3.0 to 4.0
Nickel (Ni), % 17 to 19
15 to 16.5
Nitrogen (N), % 0
0 to 0.045
Phosphorus (P), % 0 to 0.010
0 to 0.040
Silicon (Si), % 0 to 0.1
0 to 1.0
Sulfur (S), % 0 to 0.010
0 to 0.010
Titanium (Ti), % 0.3 to 0.5
0
Zirconium (Zr), % 0 to 0.020
0