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Grade 350 Maraging Steel vs. AISI 312 Stainless Steel

Both grade 350 maraging steel and AISI 312 stainless steel are iron alloys. They have 71% of their average alloy composition in common. There are 25 material properties with values for both materials. Properties with values for just one material (11, in this case) are not shown.

For each property being compared, the top bar is grade 350 maraging steel and the bottom bar is AISI 312 stainless steel.

Metric UnitsUS Customary Units

Mechanical Properties

Elastic (Young's, Tensile) Modulus, GPa 190
200
Elongation at Break, % 4.1 to 18
28
Poisson's Ratio 0.3
0.27
Rockwell C Hardness 34 to 60
27
Shear Modulus, GPa 75
80
Shear Strength, MPa 710 to 1400
510
Tensile Strength: Ultimate (UTS), MPa 1140 to 2420
780
Tensile Strength: Yield (Proof), MPa 830 to 2300
510

Thermal Properties

Latent Heat of Fusion, J/g 270
300
Melting Completion (Liquidus), °C 1470
1430
Melting Onset (Solidus), °C 1420
1390
Specific Heat Capacity, J/kg-K 450
480
Thermal Expansion, µm/m-K 12
13

Otherwise Unclassified Properties

Base Metal Price, % relative 39
17
Density, g/cm3 8.2
7.7
Embodied Carbon, kg CO2/kg material 5.6
3.4
Embodied Energy, MJ/kg 74
48
Embodied Water, L/kg 160
170

Common Calculations

PREN (Pitting Resistance) 16
33
Resilience: Ultimate (Unit Rupture Work), MJ/m3 98 to 190
190
Stiffness to Weight: Axial, points 13
15
Stiffness to Weight: Bending, points 23
25
Strength to Weight: Axial, points 38 to 82
28
Strength to Weight: Bending, points 29 to 49
24
Thermal Shock Resistance, points 35 to 74
21

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
24 to 26
Cobalt (Co), % 11.5 to 12.5
0
Iron (Fe), % 61.2 to 64.6
62.2 to 69.2
Manganese (Mn), % 0 to 0.1
0 to 2.0
Molybdenum (Mo), % 4.6 to 5.2
1.2 to 2.0
Nickel (Ni), % 18 to 19
5.5 to 6.5
Nitrogen (N), % 0
0.14 to 0.2
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 0.030
Titanium (Ti), % 1.3 to 1.6
0
Zirconium (Zr), % 0 to 0.020
0