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EN 1.0031 Steel vs. EN 1.1221 Steel

Both EN 1.0031 steel and EN 1.1221 steel are iron alloys. They have a very high 99% of their average alloy composition in common.

For each property being compared, the top bar is EN 1.0031 steel and the bottom bar is EN 1.1221 steel.

Metric UnitsUS Customary Units

Mechanical Properties

Brinell Hardness 89
210 to 250
Elastic (Young's, Tensile) Modulus, GPa 190
190
Elongation at Break, % 28
10 to 21
Fatigue Strength, MPa 160
240 to 340
Poisson's Ratio 0.29
0.29
Shear Modulus, GPa 73
72
Shear Strength, MPa 200
450 to 520
Tensile Strength: Ultimate (UTS), MPa 310
730 to 870
Tensile Strength: Yield (Proof), MPa 210
390 to 550

Thermal Properties

Latent Heat of Fusion, J/g 250
250
Maximum Temperature: Mechanical, °C 400
400
Melting Completion (Liquidus), °C 1470
1460
Melting Onset (Solidus), °C 1420
1410
Specific Heat Capacity, J/kg-K 470
470
Thermal Conductivity, W/m-K 53
48
Thermal Expansion, µm/m-K 12
12

Electrical Properties

Electrical Conductivity: Equal Volume, % IACS 7.0
7.2
Electrical Conductivity: Equal Weight (Specific), % IACS 8.0
8.3

Otherwise Unclassified Properties

Base Metal Price, % relative 1.8
2.1
Density, g/cm3 7.9
7.8
Embodied Carbon, kg CO2/kg material 1.4
1.5
Embodied Energy, MJ/kg 18
19
Embodied Water, L/kg 45
47

Common Calculations

Resilience: Ultimate (Unit Rupture Work), MJ/m3 78
67 to 130
Resilience: Unit (Modulus of Resilience), kJ/m3 120
410 to 800
Stiffness to Weight: Axial, points 13
13
Stiffness to Weight: Bending, points 24
24
Strength to Weight: Axial, points 11
26 to 31
Strength to Weight: Bending, points 13
23 to 26
Thermal Diffusivity, mm2/s 14
13
Thermal Shock Resistance, points 9.8
23 to 28

Alloy Composition

Carbon (C), % 0 to 0.1
0.57 to 0.65
Chromium (Cr), % 0
0 to 0.4
Iron (Fe), % 98.8 to 100
97.1 to 98.8
Manganese (Mn), % 0 to 0.7
0.6 to 0.9
Molybdenum (Mo), % 0
0 to 0.1
Nickel (Ni), % 0
0 to 0.4
Phosphorus (P), % 0 to 0.045
0 to 0.035
Silicon (Si), % 0 to 0.35
0 to 0.4
Sulfur (S), % 0 to 0.045
0 to 0.035