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SAE-AISI M4 Steel vs. EN 1.3551 Steel

Both SAE-AISI M4 steel and EN 1.3551 steel are iron alloys. They have 90% of their average alloy composition in common. There are 22 material properties with values for both materials. Properties with values for just one material (4, 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 1.3551 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
75
Tensile Strength: Ultimate (UTS), MPa 770 to 2150
720

Thermal Properties

Latent Heat of Fusion, J/g 260
260
Melting Completion (Liquidus), °C 1610
1490
Melting Onset (Solidus), °C 1560
1450
Specific Heat Capacity, J/kg-K 440
460
Thermal Conductivity, W/m-K 25
36
Thermal Expansion, µm/m-K 12
13

Otherwise Unclassified Properties

Base Metal Price, % relative 25
9.0
Density, g/cm3 8.3
7.9
Embodied Carbon, kg CO2/kg material 14
4.9
Embodied Energy, MJ/kg 210
71
Embodied Water, L/kg 110
82

Common Calculations

PREN (Pitting Resistance) 30
18
Stiffness to Weight: Axial, points 13
14
Stiffness to Weight: Bending, points 23
24
Strength to Weight: Axial, points 26 to 72
26
Strength to Weight: Bending, points 23 to 45
23
Thermal Diffusivity, mm2/s 6.9
9.8
Thermal Shock Resistance, points 24 to 68
21

Alloy Composition

Carbon (C), % 1.3 to 1.4
0.77 to 0.85
Chromium (Cr), % 3.8 to 4.8
3.9 to 4.3
Copper (Cu), % 0 to 0.25
0 to 0.3
Iron (Fe), % 75.9 to 81.4
88.8 to 91.1
Manganese (Mn), % 0.15 to 0.4
0.15 to 0.35
Molybdenum (Mo), % 4.3 to 5.5
4.0 to 4.5
Nickel (Ni), % 0 to 0.3
0
Phosphorus (P), % 0 to 0.030
0 to 0.025
Silicon (Si), % 0.2 to 0.45
0 to 0.4
Sulfur (S), % 0 to 0.030
0 to 0.015
Tungsten (W), % 5.3 to 6.5
0 to 0.25
Vanadium (V), % 3.8 to 4.5
0.9 to 1.1