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SAE-AISI M4 Steel vs. EN 1.7729 Steel

Both SAE-AISI M4 steel and EN 1.7729 steel are iron alloys. They have 82% of their average alloy composition in common. There are 22 material properties with values for both materials. Properties with values for just one material (12, 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 1.7729 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
73
Tensile Strength: Ultimate (UTS), MPa 770 to 2150
910

Thermal Properties

Latent Heat of Fusion, J/g 260
250
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
40
Thermal Expansion, µm/m-K 12
13

Otherwise Unclassified Properties

Base Metal Price, % relative 25
3.8
Density, g/cm3 8.3
7.8
Embodied Carbon, kg CO2/kg material 14
3.3
Embodied Energy, MJ/kg 210
49
Embodied Water, L/kg 110
59

Common Calculations

PREN (Pitting Resistance) 30
4.4
Stiffness to Weight: Axial, points 13
13
Stiffness to Weight: Bending, points 23
24
Strength to Weight: Axial, points 26 to 72
32
Strength to Weight: Bending, points 23 to 45
27
Thermal Diffusivity, mm2/s 6.9
11
Thermal Shock Resistance, points 24 to 68
27

Alloy Composition

Aluminum (Al), % 0
0.015 to 0.080
Arsenic (As), % 0
0 to 0.020
Boron (B), % 0
0.0010 to 0.010
Carbon (C), % 1.3 to 1.4
0.17 to 0.23
Chromium (Cr), % 3.8 to 4.8
0.9 to 1.2
Copper (Cu), % 0 to 0.25
0 to 0.2
Iron (Fe), % 75.9 to 81.4
94.8 to 97
Manganese (Mn), % 0.15 to 0.4
0.35 to 0.75
Molybdenum (Mo), % 4.3 to 5.5
0.9 to 1.1
Nickel (Ni), % 0 to 0.3
0 to 0.2
Phosphorus (P), % 0 to 0.030
0 to 0.020
Silicon (Si), % 0.2 to 0.45
0 to 0.4
Sulfur (S), % 0 to 0.030
0 to 0.015
Tin (Sn), % 0
0 to 0.020
Titanium (Ti), % 0
0.070 to 0.15
Tungsten (W), % 5.3 to 6.5
0
Vanadium (V), % 3.8 to 4.5
0.6 to 0.8