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EN 1.1121 Steel vs. EN 1.8870 Steel

Both EN 1.1121 steel and EN 1.8870 steel are iron alloys. They have a very high 98% of their average alloy composition in common. 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 1.1121 steel and the bottom bar is EN 1.8870 steel.

Metric UnitsUS Customary Units

Mechanical Properties

Brinell Hardness 120
180
Elastic (Young's, Tensile) Modulus, GPa 190
190
Elongation at Break, % 28
21
Fatigue Strength, MPa 160
310
Poisson's Ratio 0.29
0.29
Shear Modulus, GPa 73
73
Shear Strength, MPa 260
380
Tensile Strength: Ultimate (UTS), MPa 400
610
Tensile Strength: Yield (Proof), MPa 210
450

Thermal Properties

Latent Heat of Fusion, J/g 250
250
Maximum Temperature: Mechanical, °C 400
410
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 53
39
Thermal Expansion, µm/m-K 12
13

Electrical Properties

Electrical Conductivity: Equal Volume, % IACS 7.0
7.5
Electrical Conductivity: Equal Weight (Specific), % IACS 8.0
8.6

Otherwise Unclassified Properties

Base Metal Price, % relative 1.8
2.8
Density, g/cm3 7.8
7.9
Embodied Carbon, kg CO2/kg material 1.4
1.7
Embodied Energy, MJ/kg 18
22
Embodied Water, L/kg 45
50

Common Calculations

Resilience: Ultimate (Unit Rupture Work), MJ/m3 93
120
Resilience: Unit (Modulus of Resilience), kJ/m3 110
530
Stiffness to Weight: Axial, points 13
13
Stiffness to Weight: Bending, points 24
24
Strength to Weight: Axial, points 14
22
Strength to Weight: Bending, points 15
20
Thermal Diffusivity, mm2/s 14
10
Thermal Shock Resistance, points 13
18

Alloy Composition

Boron (B), % 0
0 to 0.0050
Carbon (C), % 0.070 to 0.13
0 to 0.18
Chromium (Cr), % 0
0 to 0.5
Copper (Cu), % 0
0 to 0.3
Iron (Fe), % 98.8 to 99.63
95.1 to 100
Manganese (Mn), % 0.3 to 0.6
0 to 1.7
Molybdenum (Mo), % 0
0 to 0.5
Nickel (Ni), % 0
0 to 1.0
Niobium (Nb), % 0
0 to 0.050
Nitrogen (N), % 0
0 to 0.015
Phosphorus (P), % 0 to 0.035
0 to 0.025
Silicon (Si), % 0 to 0.4
0 to 0.5
Sulfur (S), % 0 to 0.035
0 to 0.010
Titanium (Ti), % 0
0 to 0.030
Vanadium (V), % 0
0 to 0.080
Zirconium (Zr), % 0
0 to 0.050