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Grade 350 Maraging Steel vs. ASTM A372 Grade H Steel

Both grade 350 maraging steel and ASTM A372 grade H steel are iron alloys. They have 63% of their average alloy composition in common. There are 23 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 ASTM A372 grade H steel.

Metric UnitsUS Customary Units

Mechanical Properties

Elastic (Young's, Tensile) Modulus, GPa 190
190
Elongation at Break, % 4.1 to 18
20 to 22
Poisson's Ratio 0.3
0.29
Shear Modulus, GPa 75
73
Shear Strength, MPa 710 to 1400
410 to 570
Tensile Strength: Ultimate (UTS), MPa 1140 to 2420
650 to 910
Tensile Strength: Yield (Proof), MPa 830 to 2300
430 to 550

Thermal Properties

Latent Heat of Fusion, J/g 270
250
Melting Completion (Liquidus), °C 1470
1460
Melting Onset (Solidus), °C 1420
1420
Specific Heat Capacity, J/kg-K 450
470
Thermal Expansion, µm/m-K 12
13

Otherwise Unclassified Properties

Base Metal Price, % relative 39
2.3
Density, g/cm3 8.2
7.8
Embodied Carbon, kg CO2/kg material 5.6
1.5
Embodied Energy, MJ/kg 74
20
Embodied Water, L/kg 160
49

Common Calculations

Resilience: Ultimate (Unit Rupture Work), MJ/m3 98 to 190
130 to 160
Stiffness to Weight: Axial, points 13
13
Stiffness to Weight: Bending, points 23
24
Strength to Weight: Axial, points 38 to 82
23 to 32
Strength to Weight: Bending, points 29 to 49
21 to 27
Thermal Shock Resistance, points 35 to 74
19 to 27

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
0.3 to 0.4
Chromium (Cr), % 0
0.4 to 0.65
Cobalt (Co), % 11.5 to 12.5
0
Iron (Fe), % 61.2 to 64.6
97.3 to 98.3
Manganese (Mn), % 0 to 0.1
0.75 to 1.1
Molybdenum (Mo), % 4.6 to 5.2
0.15 to 0.25
Nickel (Ni), % 18 to 19
0
Phosphorus (P), % 0 to 0.010
0 to 0.015
Silicon (Si), % 0 to 0.1
0.15 to 0.35
Sulfur (S), % 0 to 0.010
0 to 0.010
Titanium (Ti), % 1.3 to 1.6
0
Zirconium (Zr), % 0 to 0.020
0

Comparable Variants