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Grade 250 Maraging Steel vs. S31655 Stainless Steel

Both grade 250 maraging steel and S31655 stainless steel are iron alloys. They have 77% of their average alloy composition in common. There are 24 material properties with values for both materials. Properties with values for just one material (12, in this case) are not shown.

For each property being compared, the top bar is grade 250 maraging steel and the bottom bar is S31655 stainless steel.

Metric UnitsUS Customary Units

Mechanical Properties

Elastic (Young's, Tensile) Modulus, GPa 190
200
Elongation at Break, % 7.3 to 17
39
Poisson's Ratio 0.3
0.28
Shear Modulus, GPa 75
78
Shear Strength, MPa 600 to 1060
490
Tensile Strength: Ultimate (UTS), MPa 970 to 1800
710
Tensile Strength: Yield (Proof), MPa 660 to 1740
350

Thermal Properties

Latent Heat of Fusion, J/g 270
290
Melting Completion (Liquidus), °C 1480
1430
Melting Onset (Solidus), °C 1430
1380
Specific Heat Capacity, J/kg-K 450
480
Thermal Expansion, µm/m-K 12
16

Otherwise Unclassified Properties

Base Metal Price, % relative 32
17
Density, g/cm3 8.2
7.8
Embodied Carbon, kg CO2/kg material 4.9
3.3
Embodied Energy, MJ/kg 65
46
Embodied Water, L/kg 140
160

Common Calculations

PREN (Pitting Resistance) 16
27
Resilience: Ultimate (Unit Rupture Work), MJ/m3 130 to 150
230
Stiffness to Weight: Axial, points 13
14
Stiffness to Weight: Bending, points 23
25
Strength to Weight: Axial, points 33 to 61
25
Strength to Weight: Bending, points 26 to 40
23
Thermal Shock Resistance, points 29 to 54
16

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
19.5 to 21.5
Cobalt (Co), % 7.0 to 8.5
0
Copper (Cu), % 0
0 to 1.0
Iron (Fe), % 66.3 to 71.1
63.2 to 71.9
Manganese (Mn), % 0 to 0.1
0 to 2.0
Molybdenum (Mo), % 4.6 to 5.2
0.5 to 1.5
Nickel (Ni), % 17 to 19
8.0 to 9.5
Nitrogen (N), % 0
0.14 to 0.25
Phosphorus (P), % 0 to 0.010
0 to 0.045
Silicon (Si), % 0 to 0.1
0 to 1.0
Sulfur (S), % 0 to 0.010
0 to 0.015
Titanium (Ti), % 0.3 to 0.5
0
Zirconium (Zr), % 0 to 0.020
0