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EN 1.8870 Steel vs. EN 1.4931 Steel

Both EN 1.8870 steel and EN 1.4931 steel are iron alloys. Both are furnished in the quenched and tempered condition. They have 87% of their average alloy composition in common. There are 31 material properties with values for both materials. Properties with values for just one material (2, in this case) are not shown.

For each property being compared, the top bar is EN 1.8870 steel and the bottom bar is EN 1.4931 steel.

Metric UnitsUS Customary Units

Mechanical Properties

Brinell Hardness 180
240
Elastic (Young's, Tensile) Modulus, GPa 190
200
Elongation at Break, % 21
17
Fatigue Strength, MPa 310
410
Impact Strength: V-Notched Charpy, J 67
30
Poisson's Ratio 0.29
0.28
Shear Modulus, GPa 73
76
Tensile Strength: Ultimate (UTS), MPa 610
810
Tensile Strength: Yield (Proof), MPa 450
620

Thermal Properties

Latent Heat of Fusion, J/g 250
270
Maximum Temperature: Mechanical, °C 410
600
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 39
24
Thermal Expansion, µm/m-K 13
14

Electrical Properties

Electrical Conductivity: Equal Volume, % IACS 7.5
9.8
Electrical Conductivity: Equal Weight (Specific), % IACS 8.6
11

Otherwise Unclassified Properties

Base Metal Price, % relative 2.8
8.5
Density, g/cm3 7.9
7.8
Embodied Carbon, kg CO2/kg material 1.7
2.9
Embodied Energy, MJ/kg 22
42
Embodied Water, L/kg 50
100

Common Calculations

Resilience: Ultimate (Unit Rupture Work), MJ/m3 120
130
Resilience: Unit (Modulus of Resilience), kJ/m3 530
970
Stiffness to Weight: Axial, points 13
14
Stiffness to Weight: Bending, points 24
25
Strength to Weight: Axial, points 22
29
Strength to Weight: Bending, points 20
25
Thermal Diffusivity, mm2/s 10
6.5
Thermal Shock Resistance, points 18
22

Alloy Composition

Boron (B), % 0 to 0.0050
0
Carbon (C), % 0 to 0.18
0.2 to 0.26
Chromium (Cr), % 0 to 0.5
11.3 to 12.2
Copper (Cu), % 0 to 0.3
0
Iron (Fe), % 95.1 to 100
83.2 to 86.8
Manganese (Mn), % 0 to 1.7
0.5 to 0.8
Molybdenum (Mo), % 0 to 0.5
1.0 to 1.2
Nickel (Ni), % 0 to 1.0
0 to 1.0
Niobium (Nb), % 0 to 0.050
0
Nitrogen (N), % 0 to 0.015
0
Phosphorus (P), % 0 to 0.025
0 to 0.030
Silicon (Si), % 0 to 0.5
0 to 0.4
Sulfur (S), % 0 to 0.010
0 to 0.020
Titanium (Ti), % 0 to 0.030
0
Tungsten (W), % 0
0 to 0.5
Vanadium (V), % 0 to 0.080
0.25 to 0.35
Zirconium (Zr), % 0 to 0.050
0