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EN 1.6311 Steel vs. EN 1.8201 Steel

Both EN 1.6311 steel and EN 1.8201 steel are iron alloys. They have a very high 96% of their average alloy composition in common.

For each property being compared, the top bar is EN 1.6311 steel and the bottom bar is EN 1.8201 steel.

Metric UnitsUS Customary Units

Mechanical Properties

Brinell Hardness 200
190
Elastic (Young's, Tensile) Modulus, GPa 190
190
Elongation at Break, % 19
20
Fatigue Strength, MPa 340
310
Impact Strength: V-Notched Charpy, J 51
38
Poisson's Ratio 0.29
0.29
Shear Modulus, GPa 73
74
Shear Strength, MPa 400
390
Tensile Strength: Ultimate (UTS), MPa 650
630
Tensile Strength: Yield (Proof), MPa 490
450

Thermal Properties

Latent Heat of Fusion, J/g 250
250
Maximum Temperature: Mechanical, °C 410
450
Melting Completion (Liquidus), °C 1460
1500
Melting Onset (Solidus), °C 1420
1450
Specific Heat Capacity, J/kg-K 470
470
Thermal Conductivity, W/m-K 39
40
Thermal Expansion, µm/m-K 13
13

Electrical Properties

Electrical Conductivity: Equal Volume, % IACS 7.4
7.8
Electrical Conductivity: Equal Weight (Specific), % IACS 8.5
8.8

Otherwise Unclassified Properties

Base Metal Price, % relative 2.9
7.0
Density, g/cm3 7.9
8.0
Embodied Carbon, kg CO2/kg material 1.6
2.5
Embodied Energy, MJ/kg 22
36
Embodied Water, L/kg 51
59

Common Calculations

PREN (Pitting Resistance) 2.1
5.7
Resilience: Ultimate (Unit Rupture Work), MJ/m3 120
110
Resilience: Unit (Modulus of Resilience), kJ/m3 650
530
Stiffness to Weight: Axial, points 13
13
Stiffness to Weight: Bending, points 24
24
Strength to Weight: Axial, points 23
22
Strength to Weight: Bending, points 21
20
Thermal Diffusivity, mm2/s 10
11
Thermal Shock Resistance, points 19
18

Alloy Composition

Aluminum (Al), % 0
0 to 0.030
Boron (B), % 0
0.0010 to 0.0060
Carbon (C), % 0.15 to 0.23
0.040 to 0.1
Chromium (Cr), % 0 to 0.5
1.9 to 2.6
Copper (Cu), % 0 to 0.2
0
Iron (Fe), % 95.9 to 98
93.6 to 96.2
Manganese (Mn), % 1.0 to 1.5
0.1 to 0.6
Molybdenum (Mo), % 0.45 to 0.6
0.050 to 0.3
Nickel (Ni), % 0.4 to 0.8
0
Niobium (Nb), % 0
0.020 to 0.080
Nitrogen (N), % 0 to 0.012
0 to 0.015
Phosphorus (P), % 0 to 0.035
0 to 0.030
Silicon (Si), % 0 to 0.4
0 to 0.5
Sulfur (S), % 0 to 0.035
0 to 0.010
Titanium (Ti), % 0
0.0050 to 0.060
Tungsten (W), % 0
1.5 to 1.8
Vanadium (V), % 0 to 0.020
0.2 to 0.3