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EN 1.1221 Steel vs. EN 1.1170 Steel

Both EN 1.1221 steel and EN 1.1170 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 EN 1.1170 steel.

Metric UnitsUS Customary Units

Mechanical Properties

Brinell Hardness 210 to 250
180 to 210
Elastic (Young's, Tensile) Modulus, GPa 190
190
Elongation at Break, % 10 to 21
16 to 17
Fatigue Strength, MPa 240 to 340
220 to 330
Poisson's Ratio 0.29
0.29
Shear Modulus, GPa 72
73
Shear Strength, MPa 450 to 520
390 to 450
Tensile Strength: Ultimate (UTS), MPa 730 to 870
640 to 730
Tensile Strength: Yield (Proof), MPa 390 to 550
330 to 500

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
50
Thermal Expansion, µm/m-K 12
12

Electrical Properties

Electrical Conductivity: Equal Volume, % IACS 7.2
7.3
Electrical Conductivity: Equal Weight (Specific), % IACS 8.3
8.4

Otherwise Unclassified Properties

Base Metal Price, % relative 2.1
2.1
Density, g/cm3 7.8
7.8
Embodied Carbon, kg CO2/kg material 1.5
1.5
Embodied Energy, MJ/kg 19
19
Embodied Water, L/kg 47
49

Common Calculations

Resilience: Ultimate (Unit Rupture Work), MJ/m3 67 to 130
91 to 100
Resilience: Unit (Modulus of Resilience), kJ/m3 410 to 800
290 to 670
Stiffness to Weight: Axial, points 13
13
Stiffness to Weight: Bending, points 24
24
Strength to Weight: Axial, points 26 to 31
23 to 26
Strength to Weight: Bending, points 23 to 26
21 to 23
Thermal Diffusivity, mm2/s 13
13
Thermal Shock Resistance, points 23 to 28
20 to 23

Alloy Composition

Carbon (C), % 0.57 to 0.65
0.25 to 0.32
Chromium (Cr), % 0 to 0.4
0 to 0.4
Iron (Fe), % 97.1 to 98.8
96.7 to 98.5
Manganese (Mn), % 0.6 to 0.9
1.3 to 1.7
Molybdenum (Mo), % 0 to 0.1
0 to 0.1
Nickel (Ni), % 0 to 0.4
0 to 0.4
Phosphorus (P), % 0 to 0.035
0 to 0.035
Silicon (Si), % 0 to 0.4
0 to 0.4
Sulfur (S), % 0 to 0.035
0 to 0.035

Comparable Variants