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AISI 440A Stainless Steel vs. Grade 300 Maraging Steel

Both AISI 440A stainless steel and grade 300 maraging steel are iron alloys. They have 67% of their average alloy composition in common. There are 24 material properties with values for both materials. Properties with values for just one material (9, in this case) are not shown.

For each property being compared, the top bar is AISI 440A 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, % 5.0 to 20
6.5 to 18
Poisson's Ratio 0.28
0.3
Shear Modulus, GPa 77
75
Shear Strength, MPa 450 to 1040
640 to 1190
Tensile Strength: Ultimate (UTS), MPa 730 to 1790
1030 to 2030
Tensile Strength: Yield (Proof), MPa 420 to 1650
760 to 1990

Thermal Properties

Latent Heat of Fusion, J/g 280
270
Melting Completion (Liquidus), °C 1480
1480
Melting Onset (Solidus), °C 1370
1430
Specific Heat Capacity, J/kg-K 480
450
Thermal Expansion, µm/m-K 10
12

Otherwise Unclassified Properties

Base Metal Price, % relative 9.0
34
Density, g/cm3 7.7
8.2
Embodied Carbon, kg CO2/kg material 2.2
5.1
Embodied Energy, MJ/kg 31
68
Embodied Water, L/kg 120
150

Common Calculations

PREN (Pitting Resistance) 18
16
Resilience: Ultimate (Unit Rupture Work), MJ/m3 87 to 120
130 to 170
Stiffness to Weight: Axial, points 14
13
Stiffness to Weight: Bending, points 25
23
Strength to Weight: Axial, points 26 to 65
35 to 68
Strength to Weight: Bending, points 23 to 43
28 to 43
Thermal Shock Resistance, points 26 to 65
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), % 0.6 to 0.75
0 to 0.030
Chromium (Cr), % 16 to 18
0
Cobalt (Co), % 0
8.5 to 9.5
Iron (Fe), % 78.4 to 83.4
65 to 68.4
Manganese (Mn), % 0 to 1.0
0 to 0.1
Molybdenum (Mo), % 0 to 0.75
4.6 to 5.2
Nickel (Ni), % 0
18 to 19
Phosphorus (P), % 0 to 0.040
0 to 0.010
Silicon (Si), % 0 to 1.0
0 to 0.1
Sulfur (S), % 0 to 0.015
0 to 0.010
Titanium (Ti), % 0
0.5 to 0.8
Zirconium (Zr), % 0
0 to 0.020

Comparable Variants