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Grade 300 Maraging Steel vs. AISI 309 Stainless Steel

Both grade 300 maraging steel and AISI 309 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 (12, in this case) are not shown.

For each property being compared, the top bar is grade 300 maraging steel and the bottom bar is AISI 309 stainless steel.

Metric UnitsUS Customary Units

Mechanical Properties

Elastic (Young's, Tensile) Modulus, GPa 190
200
Elongation at Break, % 6.5 to 18
34 to 47
Poisson's Ratio 0.3
0.27
Shear Modulus, GPa 75
78
Shear Strength, MPa 640 to 1190
420 to 470
Tensile Strength: Ultimate (UTS), MPa 1030 to 2030
600 to 710
Tensile Strength: Yield (Proof), MPa 760 to 1990
260 to 350

Thermal Properties

Latent Heat of Fusion, J/g 270
290
Melting Completion (Liquidus), °C 1480
1450
Melting Onset (Solidus), °C 1430
1400
Specific Heat Capacity, J/kg-K 450
480
Thermal Expansion, µm/m-K 12
15

Otherwise Unclassified Properties

Base Metal Price, % relative 34
19
Density, g/cm3 8.2
7.8
Embodied Carbon, kg CO2/kg material 5.1
3.6
Embodied Energy, MJ/kg 68
51
Embodied Water, L/kg 150
170

Common Calculations

PREN (Pitting Resistance) 16
23
Resilience: Ultimate (Unit Rupture Work), MJ/m3 130 to 170
200 to 230
Stiffness to Weight: Axial, points 13
14
Stiffness to Weight: Bending, points 23
25
Strength to Weight: Axial, points 35 to 68
21 to 25
Strength to Weight: Bending, points 28 to 43
20 to 23
Thermal Shock Resistance, points 31 to 62
14 to 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 0.2
Chromium (Cr), % 0
22 to 24
Cobalt (Co), % 8.5 to 9.5
0
Iron (Fe), % 65 to 68.4
58 to 66
Manganese (Mn), % 0 to 0.1
0 to 2.0
Molybdenum (Mo), % 4.6 to 5.2
0
Nickel (Ni), % 18 to 19
12 to 15
Phosphorus (P), % 0 to 0.010
0 to 0.045
Silicon (Si), % 0 to 0.1
0 to 0.75
Sulfur (S), % 0 to 0.010
0 to 0.030
Titanium (Ti), % 0.5 to 0.8
0
Zirconium (Zr), % 0 to 0.020
0