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Grade 300 Maraging Steel vs. ASTM A387 Grade 21 Steel

Both grade 300 maraging steel and ASTM A387 grade 21 steel are iron alloys. They have 68% of their average alloy composition in common. There are 24 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 300 maraging steel and the bottom bar is ASTM A387 grade 21 steel.

Metric UnitsUS Customary Units

Mechanical Properties

Elastic (Young's, Tensile) Modulus, GPa 190
190
Elongation at Break, % 6.5 to 18
21
Poisson's Ratio 0.3
0.29
Shear Modulus, GPa 75
74
Shear Strength, MPa 640 to 1190
310 to 370
Tensile Strength: Ultimate (UTS), MPa 1030 to 2030
500 to 590
Tensile Strength: Yield (Proof), MPa 760 to 1990
230 to 350

Thermal Properties

Latent Heat of Fusion, J/g 270
260
Melting Completion (Liquidus), °C 1480
1470
Melting Onset (Solidus), °C 1430
1430
Specific Heat Capacity, J/kg-K 450
470
Thermal Expansion, µm/m-K 12
13

Otherwise Unclassified Properties

Base Metal Price, % relative 34
4.1
Density, g/cm3 8.2
7.9
Embodied Carbon, kg CO2/kg material 5.1
1.8
Embodied Energy, MJ/kg 68
23
Embodied Water, L/kg 150
62

Common Calculations

PREN (Pitting Resistance) 16
6.4
Resilience: Ultimate (Unit Rupture Work), MJ/m3 130 to 170
84 to 110
Stiffness to Weight: Axial, points 13
13
Stiffness to Weight: Bending, points 23
24
Strength to Weight: Axial, points 35 to 68
18 to 21
Strength to Weight: Bending, points 28 to 43
18 to 20
Thermal Shock Resistance, points 31 to 62
14 to 17

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
0.050 to 0.15
Chromium (Cr), % 0
2.8 to 3.3
Cobalt (Co), % 8.5 to 9.5
0
Iron (Fe), % 65 to 68.4
94.4 to 96
Manganese (Mn), % 0 to 0.1
0.3 to 0.6
Molybdenum (Mo), % 4.6 to 5.2
0.9 to 1.1
Nickel (Ni), % 18 to 19
0
Phosphorus (P), % 0 to 0.010
0 to 0.025
Silicon (Si), % 0 to 0.1
0 to 0.5
Sulfur (S), % 0 to 0.010
0 to 0.025
Titanium (Ti), % 0.5 to 0.8
0
Zirconium (Zr), % 0 to 0.020
0

Comparable Variants