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SAE-AISI M4 Steel vs. SAE-AISI D4 Steel

Both SAE-AISI M4 steel and SAE-AISI D4 steel are iron alloys. They have 87% of their average alloy composition in common. There are 22 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 SAE-AISI M4 steel and the bottom bar is SAE-AISI D4 steel.

Metric UnitsUS Customary Units

Mechanical Properties

Elastic (Young's, Tensile) Modulus, GPa 200
190
Poisson's Ratio 0.29
0.28
Shear Modulus, GPa 76
74
Tensile Strength: Ultimate (UTS), MPa 770 to 2150
760 to 2060

Thermal Properties

Latent Heat of Fusion, J/g 260
270
Melting Completion (Liquidus), °C 1610
1430
Melting Onset (Solidus), °C 1560
1380
Specific Heat Capacity, J/kg-K 440
480
Thermal Conductivity, W/m-K 25
31
Thermal Expansion, µm/m-K 12
12

Otherwise Unclassified Properties

Base Metal Price, % relative 25
8.0
Density, g/cm3 8.3
7.7
Embodied Carbon, kg CO2/kg material 14
3.3
Embodied Energy, MJ/kg 210
49
Embodied Water, L/kg 110
100

Common Calculations

PREN (Pitting Resistance) 30
15
Stiffness to Weight: Axial, points 13
14
Stiffness to Weight: Bending, points 23
25
Strength to Weight: Axial, points 26 to 72
27 to 75
Strength to Weight: Bending, points 23 to 45
24 to 47
Thermal Diffusivity, mm2/s 6.9
8.3
Thermal Shock Resistance, points 24 to 68
23 to 63

Alloy Composition

Carbon (C), % 1.3 to 1.4
2.1 to 2.4
Chromium (Cr), % 3.8 to 4.8
11 to 13
Copper (Cu), % 0 to 0.25
0 to 0.25
Iron (Fe), % 75.9 to 81.4
80.6 to 86.3
Manganese (Mn), % 0.15 to 0.4
0 to 0.6
Molybdenum (Mo), % 4.3 to 5.5
0.7 to 1.2
Nickel (Ni), % 0 to 0.3
0 to 0.3
Phosphorus (P), % 0 to 0.030
0 to 0.030
Silicon (Si), % 0.2 to 0.45
0 to 0.6
Sulfur (S), % 0 to 0.030
0 to 0.030
Tungsten (W), % 5.3 to 6.5
0
Vanadium (V), % 3.8 to 4.5
0 to 1.0

Comparable Variants