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SAE-AISI A4 Steel vs. SAE-AISI M46 Steel

Both SAE-AISI A4 steel and SAE-AISI M46 steel are iron alloys. They have 77% of their average alloy composition in common. There are 22 material properties with values for both materials. Properties with values for just one material (2, in this case) are not shown.

For each property being compared, the top bar is SAE-AISI A4 steel and the bottom bar is SAE-AISI M46 steel.

Metric UnitsUS Customary Units

Mechanical Properties

Elastic (Young's, Tensile) Modulus, GPa 190
200
Poisson's Ratio 0.29
0.29
Shear Modulus, GPa 73
77
Tensile Strength: Ultimate (UTS), MPa 710 to 2050
800 to 2300

Thermal Properties

Latent Heat of Fusion, J/g 250
270
Melting Completion (Liquidus), °C 1450
1540
Melting Onset (Solidus), °C 1410
1500
Specific Heat Capacity, J/kg-K 470
450
Thermal Conductivity, W/m-K 40
18
Thermal Expansion, µm/m-K 12
12

Otherwise Unclassified Properties

Base Metal Price, % relative 3.9
33
Density, g/cm3 7.8
8.1
Embodied Carbon, kg CO2/kg material 1.8
12
Embodied Energy, MJ/kg 24
180
Embodied Water, L/kg 59
150

Common Calculations

PREN (Pitting Resistance) 5.3
35
Stiffness to Weight: Axial, points 13
14
Stiffness to Weight: Bending, points 24
24
Strength to Weight: Axial, points 25 to 73
27 to 78
Strength to Weight: Bending, points 23 to 46
24 to 48
Thermal Diffusivity, mm2/s 11
4.9
Thermal Shock Resistance, points 23 to 67
25 to 71

Alloy Composition

Carbon (C), % 1.0 to 1.1
1.2 to 1.3
Chromium (Cr), % 0.9 to 2.2
3.7 to 4.2
Cobalt (Co), % 0
7.8 to 8.8
Copper (Cu), % 0 to 0.25
0 to 0.25
Iron (Fe), % 92 to 95.5
70 to 73.8
Manganese (Mn), % 1.8 to 2.2
0.2 to 0.4
Molybdenum (Mo), % 0.9 to 1.4
8.0 to 8.5
Nickel (Ni), % 0 to 0.3
0 to 0.3
Phosphorus (P), % 0 to 0.030
0 to 0.030
Silicon (Si), % 0 to 0.5
0.4 to 0.65
Sulfur (S), % 0 to 0.030
0 to 0.030
Tungsten (W), % 0
1.9 to 2.2
Vanadium (V), % 0
3.0 to 3.3

Comparable Variants