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Grade 250 Maraging Steel vs. AISI 329 Stainless Steel

Both grade 250 maraging steel and AISI 329 stainless steel are iron alloys. They have 74% of their average alloy composition in common. There are 25 material properties with values for both materials. Properties with values for just one material (10, in this case) are not shown.

For each property being compared, the top bar is grade 250 maraging steel and the bottom bar is AISI 329 stainless steel.

Metric UnitsUS Customary Units

Mechanical Properties

Elastic (Young's, Tensile) Modulus, GPa 190
200
Elongation at Break, % 7.3 to 17
17
Poisson's Ratio 0.3
0.27
Rockwell C Hardness 30 to 53
24
Shear Modulus, GPa 75
80
Shear Strength, MPa 600 to 1060
440
Tensile Strength: Ultimate (UTS), MPa 970 to 1800
710
Tensile Strength: Yield (Proof), MPa 660 to 1740
540

Thermal Properties

Latent Heat of Fusion, J/g 270
300
Melting Completion (Liquidus), °C 1480
1440
Melting Onset (Solidus), °C 1430
1390
Specific Heat Capacity, J/kg-K 450
480
Thermal Expansion, µm/m-K 12
13

Otherwise Unclassified Properties

Base Metal Price, % relative 32
16
Density, g/cm3 8.2
7.7
Embodied Carbon, kg CO2/kg material 4.9
3.1
Embodied Energy, MJ/kg 65
44
Embodied Water, L/kg 140
170

Common Calculations

PREN (Pitting Resistance) 16
30
Resilience: Ultimate (Unit Rupture Work), MJ/m3 130 to 150
110
Stiffness to Weight: Axial, points 13
15
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
19

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 0.080
Chromium (Cr), % 0
23 to 28
Cobalt (Co), % 7.0 to 8.5
0
Iron (Fe), % 66.3 to 71.1
63.1 to 74
Manganese (Mn), % 0 to 0.1
0 to 1.0
Molybdenum (Mo), % 4.6 to 5.2
1.0 to 2.0
Nickel (Ni), % 17 to 19
2.0 to 5.0
Phosphorus (P), % 0 to 0.010
0 to 0.040
Silicon (Si), % 0 to 0.1
0 to 0.75
Sulfur (S), % 0 to 0.010
0 to 0.030
Titanium (Ti), % 0.3 to 0.5
0
Zirconium (Zr), % 0 to 0.020
0