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SAE-AISI 1045 Steel vs. EN 1.1121 Steel

Both SAE-AISI 1045 steel and EN 1.1121 steel are iron alloys. Their average alloy composition is basically identical. There are 31 material properties with values for both materials. Properties with values for just one material (1, in this case) are not shown.

For each property being compared, the top bar is SAE-AISI 1045 steel and the bottom bar is EN 1.1121 steel.

Metric UnitsUS Customary Units

Mechanical Properties

Brinell Hardness 180 to 190
120
Elastic (Young's, Tensile) Modulus, GPa 190
190
Elongation at Break, % 13 to 18
28
Fatigue Strength, MPa 220 to 370
160
Poisson's Ratio 0.29
0.29
Shear Modulus, GPa 72
73
Shear Strength, MPa 380 to 410
260
Tensile Strength: Ultimate (UTS), MPa 620 to 680
400
Tensile Strength: Yield (Proof), MPa 330 to 580
210

Thermal Properties

Latent Heat of Fusion, J/g 250
250
Maximum Temperature: Mechanical, °C 400
400
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
53
Thermal Expansion, µm/m-K 12
12

Electrical Properties

Electrical Conductivity: Equal Volume, % IACS 7.0
7.0
Electrical Conductivity: Equal Weight (Specific), % IACS 8.1
8.0

Otherwise Unclassified Properties

Base Metal Price, % relative 1.8
1.8
Density, g/cm3 7.8
7.8
Embodied Carbon, kg CO2/kg material 1.4
1.4
Embodied Energy, MJ/kg 18
18
Embodied Water, L/kg 46
45

Common Calculations

Resilience: Ultimate (Unit Rupture Work), MJ/m3 84 to 93
93
Resilience: Unit (Modulus of Resilience), kJ/m3 300 to 900
110
Stiffness to Weight: Axial, points 13
13
Stiffness to Weight: Bending, points 24
24
Strength to Weight: Axial, points 22 to 24
14
Strength to Weight: Bending, points 21 to 22
15
Thermal Diffusivity, mm2/s 14
14
Thermal Shock Resistance, points 20 to 22
13

Alloy Composition

Carbon (C), % 0.43 to 0.5
0.070 to 0.13
Iron (Fe), % 98.5 to 99
98.8 to 99.63
Manganese (Mn), % 0.6 to 0.9
0.3 to 0.6
Phosphorus (P), % 0 to 0.040
0 to 0.035
Silicon (Si), % 0
0 to 0.4
Sulfur (S), % 0 to 0.050
0 to 0.035