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ASTM A372 Grade M Steel vs. EN 1.7139 Steel

Both ASTM A372 grade M steel and EN 1.7139 steel are iron alloys. They have a very high 95% of their average alloy composition in common. There are 25 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 ASTM A372 grade M steel and the bottom bar is EN 1.7139 steel.

Metric UnitsUS Customary Units

Mechanical Properties

Brinell Hardness 240 to 280
150 to 180
Elastic (Young's, Tensile) Modulus, GPa 190
190
Poisson's Ratio 0.29
0.29
Shear Modulus, GPa 73
73
Tensile Strength: Ultimate (UTS), MPa 810 to 910
480 to 1390

Thermal Properties

Latent Heat of Fusion, J/g 250
250
Maximum Temperature: Mechanical, °C 450
420
Melting Completion (Liquidus), °C 1460
1460
Melting Onset (Solidus), °C 1420
1420
Specific Heat Capacity, J/kg-K 470
470
Thermal Conductivity, W/m-K 46
44
Thermal Expansion, µm/m-K 13
13

Electrical Properties

Electrical Conductivity: Equal Volume, % IACS 8.0
7.3
Electrical Conductivity: Equal Weight (Specific), % IACS 9.1
8.3

Otherwise Unclassified Properties

Base Metal Price, % relative 5.0
2.2
Density, g/cm3 7.9
7.8
Embodied Carbon, kg CO2/kg material 2.0
1.4
Embodied Energy, MJ/kg 27
19
Embodied Water, L/kg 61
51

Common Calculations

Stiffness to Weight: Axial, points 13
13
Stiffness to Weight: Bending, points 24
24
Strength to Weight: Axial, points 29 to 32
17 to 49
Strength to Weight: Bending, points 24 to 27
17 to 35
Thermal Diffusivity, mm2/s 12
12
Thermal Shock Resistance, points 24 to 27
14 to 41

Alloy Composition

Carbon (C), % 0 to 0.23
0.14 to 0.19
Chromium (Cr), % 1.5 to 2.0
0.8 to 1.1
Copper (Cu), % 0
0 to 0.25
Iron (Fe), % 92.5 to 95.1
96.8 to 98
Manganese (Mn), % 0.2 to 0.4
1.0 to 1.3
Molybdenum (Mo), % 0.4 to 0.6
0
Nickel (Ni), % 2.8 to 3.9
0
Phosphorus (P), % 0 to 0.015
0 to 0.025
Silicon (Si), % 0 to 0.3
0 to 0.3
Sulfur (S), % 0 to 0.010
0.020 to 0.040
Vanadium (V), % 0 to 0.080
0