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SAE-AISI 4820 Steel vs. EN 1.6773 Steel

Both SAE-AISI 4820 steel and EN 1.6773 steel are iron alloys. They have a very high 98% of their average alloy composition in common. There are 31 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 4820 steel and the bottom bar is EN 1.6773 steel.

Metric UnitsUS Customary Units

Mechanical Properties

Brinell Hardness 170
340
Elastic (Young's, Tensile) Modulus, GPa 190
190
Elongation at Break, % 21
11
Fatigue Strength, MPa 260
560
Poisson's Ratio 0.29
0.29
Shear Modulus, GPa 73
73
Shear Strength, MPa 360
670
Tensile Strength: Ultimate (UTS), MPa 570
1120
Tensile Strength: Yield (Proof), MPa 370
910

Thermal Properties

Latent Heat of Fusion, J/g 250
250
Maximum Temperature: Mechanical, °C 410
450
Melting Completion (Liquidus), °C 1460
1460
Melting Onset (Solidus), °C 1420
1420
Specific Heat Capacity, J/kg-K 470
470
Thermal Conductivity, W/m-K 51
46
Thermal Expansion, µm/m-K 11
13

Electrical Properties

Electrical Conductivity: Equal Volume, % IACS 7.6
8.1
Electrical Conductivity: Equal Weight (Specific), % IACS 8.7
9.2

Otherwise Unclassified Properties

Base Metal Price, % relative 4.3
5.0
Density, g/cm3 7.9
7.9
Embodied Carbon, kg CO2/kg material 1.8
1.9
Embodied Energy, MJ/kg 24
26
Embodied Water, L/kg 53
61

Common Calculations

Resilience: Ultimate (Unit Rupture Work), MJ/m3 110
110
Resilience: Unit (Modulus of Resilience), kJ/m3 370
2210
Stiffness to Weight: Axial, points 13
13
Stiffness to Weight: Bending, points 24
24
Strength to Weight: Axial, points 20
40
Strength to Weight: Bending, points 19
30
Thermal Diffusivity, mm2/s 14
12
Thermal Shock Resistance, points 19
33

Alloy Composition

Carbon (C), % 0.18 to 0.23
0.32 to 0.39
Chromium (Cr), % 0
1.6 to 2.0
Iron (Fe), % 94.6 to 95.7
92 to 93.9
Manganese (Mn), % 0.5 to 0.7
0.3 to 0.6
Molybdenum (Mo), % 0.2 to 0.3
0.25 to 0.45
Nickel (Ni), % 3.3 to 3.8
3.6 to 4.1
Phosphorus (P), % 0 to 0.035
0 to 0.030
Silicon (Si), % 0.15 to 0.35
0 to 0.4
Sulfur (S), % 0 to 0.040
0 to 0.025