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SAE-AISI M4 Steel vs. EN 1.7378 Steel

Both SAE-AISI M4 steel and EN 1.7378 steel are iron alloys. They have 83% of their average alloy composition in common. There are 22 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 SAE-AISI M4 steel and the bottom bar is EN 1.7378 steel.

Metric UnitsUS Customary Units

Mechanical Properties

Elastic (Young's, Tensile) Modulus, GPa 200
190
Poisson's Ratio 0.29
0.29
Shear Modulus, GPa 76
74
Tensile Strength: Ultimate (UTS), MPa 770 to 2150
700

Thermal Properties

Latent Heat of Fusion, J/g 260
260
Melting Completion (Liquidus), °C 1610
1470
Melting Onset (Solidus), °C 1560
1430
Specific Heat Capacity, J/kg-K 440
470
Thermal Conductivity, W/m-K 25
39
Thermal Expansion, µm/m-K 12
13

Otherwise Unclassified Properties

Base Metal Price, % relative 25
4.0
Density, g/cm3 8.3
7.8
Embodied Carbon, kg CO2/kg material 14
2.3
Embodied Energy, MJ/kg 210
33
Embodied Water, L/kg 110
61

Common Calculations

PREN (Pitting Resistance) 30
5.8
Stiffness to Weight: Axial, points 13
13
Stiffness to Weight: Bending, points 23
24
Strength to Weight: Axial, points 26 to 72
25
Strength to Weight: Bending, points 23 to 45
22
Thermal Diffusivity, mm2/s 6.9
10
Thermal Shock Resistance, points 24 to 68
20

Alloy Composition

Aluminum (Al), % 0
0 to 0.020
Boron (B), % 0
0.0015 to 0.0070
Carbon (C), % 1.3 to 1.4
0.050 to 0.1
Chromium (Cr), % 3.8 to 4.8
2.2 to 2.6
Copper (Cu), % 0 to 0.25
0
Iron (Fe), % 75.9 to 81.4
94.6 to 96.1
Manganese (Mn), % 0.15 to 0.4
0.3 to 0.7
Molybdenum (Mo), % 4.3 to 5.5
0.9 to 1.1
Nickel (Ni), % 0 to 0.3
0
Nitrogen (N), % 0
0 to 0.010
Phosphorus (P), % 0 to 0.030
0 to 0.020
Silicon (Si), % 0.2 to 0.45
0.15 to 0.45
Sulfur (S), % 0 to 0.030
0 to 0.010
Titanium (Ti), % 0
0.050 to 0.1
Tungsten (W), % 5.3 to 6.5
0
Vanadium (V), % 3.8 to 4.5
0.2 to 0.3