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EN 1.1221 Steel vs. EN 1.0308 Steel

Both EN 1.1221 steel and EN 1.0308 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 1.1221 steel and the bottom bar is EN 1.0308 steel.

Metric UnitsUS Customary Units

Mechanical Properties

Brinell Hardness 210 to 250
100 to 130
Elastic (Young's, Tensile) Modulus, GPa 190
190
Elongation at Break, % 10 to 21
7.8 to 28
Fatigue Strength, MPa 240 to 340
140 to 200
Poisson's Ratio 0.29
0.29
Shear Modulus, GPa 72
73
Shear Strength, MPa 450 to 520
230 to 260
Tensile Strength: Ultimate (UTS), MPa 730 to 870
360 to 440
Tensile Strength: Yield (Proof), MPa 390 to 550
190 to 340

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
12

Electrical Properties

Electrical Conductivity: Equal Volume, % IACS 7.2
7.1
Electrical Conductivity: Equal Weight (Specific), % IACS 8.3
8.1

Otherwise Unclassified Properties

Base Metal Price, % relative 2.1
1.8
Density, g/cm3 7.8
7.9
Embodied Carbon, kg CO2/kg material 1.5
1.4
Embodied Energy, MJ/kg 19
18
Embodied Water, L/kg 47
46

Common Calculations

Resilience: Ultimate (Unit Rupture Work), MJ/m3 67 to 130
32 to 95
Resilience: Unit (Modulus of Resilience), kJ/m3 410 to 800
93 to 300
Stiffness to Weight: Axial, points 13
13
Stiffness to Weight: Bending, points 24
24
Strength to Weight: Axial, points 26 to 31
13 to 16
Strength to Weight: Bending, points 23 to 26
14 to 16
Thermal Diffusivity, mm2/s 13
14
Thermal Shock Resistance, points 23 to 28
11 to 14

Alloy Composition

Carbon (C), % 0.57 to 0.65
0 to 0.17
Chromium (Cr), % 0 to 0.4
0
Iron (Fe), % 97.1 to 98.8
98.2 to 100
Manganese (Mn), % 0.6 to 0.9
0 to 1.2
Molybdenum (Mo), % 0 to 0.1
0
Nickel (Ni), % 0 to 0.4
0
Phosphorus (P), % 0 to 0.035
0 to 0.045
Silicon (Si), % 0 to 0.4
0 to 0.35
Sulfur (S), % 0 to 0.035
0 to 0.045

Comparable Variants