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SAE-AISI M4 Steel vs. EN 1.4905 Stainless Steel

Both SAE-AISI M4 steel and EN 1.4905 stainless steel are iron alloys. They have 86% 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 1.4905 stainless 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
76
Tensile Strength: Ultimate (UTS), MPa 770 to 2150
740

Thermal Properties

Latent Heat of Fusion, J/g 260
270
Melting Completion (Liquidus), °C 1610
1480
Melting Onset (Solidus), °C 1560
1440
Specific Heat Capacity, J/kg-K 440
470
Thermal Conductivity, W/m-K 25
26
Thermal Expansion, µm/m-K 12
11

Otherwise Unclassified Properties

Base Metal Price, % relative 25
9.5
Density, g/cm3 8.3
7.9
Embodied Carbon, kg CO2/kg material 14
2.8
Embodied Energy, MJ/kg 210
40
Embodied Water, L/kg 110
90

Common Calculations

PREN (Pitting Resistance) 30
15
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
7.0
Thermal Shock Resistance, points 24 to 68
25

Alloy Composition

Aluminum (Al), % 0
0 to 0.040
Boron (B), % 0
0.00050 to 0.0050
Carbon (C), % 1.3 to 1.4
0.090 to 0.13
Chromium (Cr), % 3.8 to 4.8
8.5 to 9.5
Copper (Cu), % 0 to 0.25
0
Iron (Fe), % 75.9 to 81.4
86.2 to 88.8
Manganese (Mn), % 0.15 to 0.4
0.3 to 0.6
Molybdenum (Mo), % 4.3 to 5.5
0.9 to 1.1
Nickel (Ni), % 0 to 0.3
0.1 to 0.4
Niobium (Nb), % 0
0.060 to 0.1
Nitrogen (N), % 0
0.050 to 0.090
Phosphorus (P), % 0 to 0.030
0 to 0.020
Silicon (Si), % 0.2 to 0.45
0.1 to 0.5
Sulfur (S), % 0 to 0.030
0 to 0.010
Tungsten (W), % 5.3 to 6.5
0.9 to 1.1
Vanadium (V), % 3.8 to 4.5
0.18 to 0.25