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AISI 309 Stainless Steel vs. Grade 300 Maraging Steel

Both AISI 309 stainless steel and grade 300 maraging 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 AISI 309 stainless steel and the bottom bar is grade 300 maraging steel.

Metric UnitsUS Customary Units

Mechanical Properties

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

Thermal Properties

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

Otherwise Unclassified Properties

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

Common Calculations

PREN (Pitting Resistance) 23
16
Resilience: Ultimate (Unit Rupture Work), MJ/m3 200 to 230
130 to 170
Stiffness to Weight: Axial, points 14
13
Stiffness to Weight: Bending, points 25
23
Strength to Weight: Axial, points 21 to 25
35 to 68
Strength to Weight: Bending, points 20 to 23
28 to 43
Thermal Shock Resistance, points 14 to 16
31 to 62

Alloy Composition

Aluminum (Al), % 0
0.050 to 0.15
Boron (B), % 0
0 to 0.0030
Calcium (Ca), % 0
0 to 0.050
Carbon (C), % 0 to 0.2
0 to 0.030
Chromium (Cr), % 22 to 24
0
Cobalt (Co), % 0
8.5 to 9.5
Iron (Fe), % 58 to 66
65 to 68.4
Manganese (Mn), % 0 to 2.0
0 to 0.1
Molybdenum (Mo), % 0
4.6 to 5.2
Nickel (Ni), % 12 to 15
18 to 19
Phosphorus (P), % 0 to 0.045
0 to 0.010
Silicon (Si), % 0 to 0.75
0 to 0.1
Sulfur (S), % 0 to 0.030
0 to 0.010
Titanium (Ti), % 0
0.5 to 0.8
Zirconium (Zr), % 0
0 to 0.020