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EN 1.7221 Steel vs. SAE-AISI 1018 Steel

Both EN 1.7221 steel and SAE-AISI 1018 steel are iron alloys. They have a very high 98% of their average alloy composition in common. There are 30 material properties with values for both materials. Properties with values for just one material (3, in this case) are not shown.

For each property being compared, the top bar is EN 1.7221 steel and the bottom bar is SAE-AISI 1018 steel.

Metric UnitsUS Customary Units

Mechanical Properties

Brinell Hardness 200 to 230
130 to 140
Elastic (Young's, Tensile) Modulus, GPa 190
190
Elongation at Break, % 11 to 17
17 to 27
Fatigue Strength, MPa 290 to 390
180 to 270
Poisson's Ratio 0.29
0.29
Shear Modulus, GPa 73
73
Tensile Strength: Ultimate (UTS), MPa 650 to 780
430 to 480
Tensile Strength: Yield (Proof), MPa 430 to 630
240 to 400

Thermal Properties

Latent Heat of Fusion, J/g 250
250
Maximum Temperature: Mechanical, °C 420
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 44
52
Thermal Expansion, µm/m-K 13
12

Electrical Properties

Electrical Conductivity: Equal Volume, % IACS 7.3
7.0
Electrical Conductivity: Equal Weight (Specific), % IACS 8.4
8.0

Otherwise Unclassified Properties

Base Metal Price, % relative 2.4
1.8
Density, g/cm3 7.8
7.9
Embodied Carbon, kg CO2/kg material 1.5
1.4
Embodied Energy, MJ/kg 20
18
Embodied Water, L/kg 51
46

Common Calculations

Resilience: Ultimate (Unit Rupture Work), MJ/m3 83 to 98
75 to 100
Resilience: Unit (Modulus of Resilience), kJ/m3 490 to 1050
150 to 430
Stiffness to Weight: Axial, points 13
13
Stiffness to Weight: Bending, points 24
24
Strength to Weight: Axial, points 23 to 27
15 to 17
Strength to Weight: Bending, points 21 to 24
16 to 17
Thermal Diffusivity, mm2/s 12
14
Thermal Shock Resistance, points 19 to 23
14 to 15

Alloy Composition

Carbon (C), % 0.22 to 0.29
0.15 to 0.2
Chromium (Cr), % 0.8 to 1.2
0
Iron (Fe), % 96.8 to 98.3
98.8 to 99.25
Manganese (Mn), % 0.5 to 0.8
0.6 to 0.9
Molybdenum (Mo), % 0.15 to 0.3
0
Phosphorus (P), % 0 to 0.025
0 to 0.040
Silicon (Si), % 0 to 0.6
0
Sulfur (S), % 0 to 0.030
0 to 0.050

Comparable Variants