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EN 1.1221 Steel vs. SAE-AISI 1137 Steel

Both EN 1.1221 steel and SAE-AISI 1137 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 EN 1.1221 steel and the bottom bar is SAE-AISI 1137 steel.

Metric UnitsUS Customary Units

Mechanical Properties

Brinell Hardness 210 to 250
200 to 210
Elastic (Young's, Tensile) Modulus, GPa 190
190
Elongation at Break, % 10 to 21
11 to 17
Fatigue Strength, MPa 240 to 340
250 to 400
Poisson's Ratio 0.29
0.29
Shear Modulus, GPa 72
73
Shear Strength, MPa 450 to 520
430 to 460
Tensile Strength: Ultimate (UTS), MPa 730 to 870
700 to 760
Tensile Strength: Yield (Proof), MPa 390 to 550
370 to 650

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 1410
1420
Specific Heat Capacity, J/kg-K 470
470
Thermal Conductivity, W/m-K 48
51
Thermal Expansion, µm/m-K 12
13

Electrical Properties

Electrical Conductivity: Equal Volume, % IACS 7.2
10
Electrical Conductivity: Equal Weight (Specific), % IACS 8.3
12

Otherwise Unclassified Properties

Base Metal Price, % relative 2.1
1.9
Density, g/cm3 7.8
7.8
Embodied Carbon, kg CO2/kg material 1.5
1.4
Embodied Energy, MJ/kg 19
19
Embodied Water, L/kg 47
48

Common Calculations

Resilience: Ultimate (Unit Rupture Work), MJ/m3 67 to 130
81 to 100
Resilience: Unit (Modulus of Resilience), kJ/m3 410 to 800
360 to 1130
Stiffness to Weight: Axial, points 13
13
Stiffness to Weight: Bending, points 24
24
Strength to Weight: Axial, points 26 to 31
25 to 27
Strength to Weight: Bending, points 23 to 26
22 to 24
Thermal Diffusivity, mm2/s 13
14
Thermal Shock Resistance, points 23 to 28
21 to 23

Alloy Composition

Carbon (C), % 0.57 to 0.65
0.32 to 0.39
Chromium (Cr), % 0 to 0.4
0
Iron (Fe), % 97.1 to 98.8
97.8 to 98.3
Manganese (Mn), % 0.6 to 0.9
1.4 to 1.7
Molybdenum (Mo), % 0 to 0.1
0
Nickel (Ni), % 0 to 0.4
0
Phosphorus (P), % 0 to 0.035
0 to 0.040
Silicon (Si), % 0 to 0.4
0
Sulfur (S), % 0 to 0.035
0.080 to 0.13