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AISI 384 Stainless Steel vs. ASTM A372 Grade M Steel

Both AISI 384 stainless steel and ASTM A372 grade M steel are iron alloys. They have 70% of their average alloy composition in common. There are 26 material properties with values for both materials. Properties with values for just one material (7, in this case) are not shown.

For each property being compared, the top bar is AISI 384 stainless steel and the bottom bar is ASTM A372 grade M steel.

Metric UnitsUS Customary Units

Mechanical Properties

Brinell Hardness 150
240 to 280
Elastic (Young's, Tensile) Modulus, GPa 200
190
Poisson's Ratio 0.28
0.29
Shear Modulus, GPa 76
73
Tensile Strength: Ultimate (UTS), MPa 480
810 to 910

Thermal Properties

Latent Heat of Fusion, J/g 290
250
Maximum Temperature: Mechanical, °C 910
450
Melting Completion (Liquidus), °C 1420
1460
Melting Onset (Solidus), °C 1380
1420
Specific Heat Capacity, J/kg-K 480
470
Thermal Conductivity, W/m-K 16
46
Thermal Expansion, µm/m-K 16
13

Electrical Properties

Electrical Conductivity: Equal Volume, % IACS 2.2
8.0
Electrical Conductivity: Equal Weight (Specific), % IACS 2.5
9.1

Otherwise Unclassified Properties

Base Metal Price, % relative 20
5.0
Density, g/cm3 7.9
7.9
Embodied Carbon, kg CO2/kg material 3.7
2.0
Embodied Energy, MJ/kg 52
27
Embodied Water, L/kg 150
61

Common Calculations

PREN (Pitting Resistance) 16
3.4
Stiffness to Weight: Axial, points 14
13
Stiffness to Weight: Bending, points 24
24
Strength to Weight: Axial, points 17
29 to 32
Strength to Weight: Bending, points 17
24 to 27
Thermal Diffusivity, mm2/s 4.3
12
Thermal Shock Resistance, points 11
24 to 27

Alloy Composition

Carbon (C), % 0 to 0.040
0 to 0.23
Chromium (Cr), % 15 to 17
1.5 to 2.0
Iron (Fe), % 60.9 to 68
92.5 to 95.1
Manganese (Mn), % 0 to 2.0
0.2 to 0.4
Molybdenum (Mo), % 0
0.4 to 0.6
Nickel (Ni), % 17 to 19
2.8 to 3.9
Phosphorus (P), % 0 to 0.045
0 to 0.015
Silicon (Si), % 0 to 1.0
0 to 0.3
Sulfur (S), % 0 to 0.030
0 to 0.010
Vanadium (V), % 0
0 to 0.080