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EN 1.8201 Steel vs. EN 1.7715 Steel

Both EN 1.8201 steel and EN 1.7715 steel are iron alloys. Both are furnished in the normalized and tempered condition. They have a very high 96% of their average alloy composition in common.

For each property being compared, the top bar is EN 1.8201 steel and the bottom bar is EN 1.7715 steel.

Metric UnitsUS Customary Units

Mechanical Properties

Brinell Hardness 190
160
Elastic (Young's, Tensile) Modulus, GPa 190
190
Elongation at Break, % 20
21
Fatigue Strength, MPa 310
240
Impact Strength: V-Notched Charpy, J 38
34
Poisson's Ratio 0.29
0.29
Shear Modulus, GPa 74
73
Shear Strength, MPa 390
340
Tensile Strength: Ultimate (UTS), MPa 630
540
Tensile Strength: Yield (Proof), MPa 450
340

Thermal Properties

Latent Heat of Fusion, J/g 250
250
Maximum Temperature: Mechanical, °C 450
420
Melting Completion (Liquidus), °C 1500
1470
Melting Onset (Solidus), °C 1450
1430
Specific Heat Capacity, J/kg-K 470
470
Thermal Conductivity, W/m-K 40
40
Thermal Expansion, µm/m-K 13
13

Electrical Properties

Electrical Conductivity: Equal Volume, % IACS 7.8
7.3
Electrical Conductivity: Equal Weight (Specific), % IACS 8.8
8.4

Otherwise Unclassified Properties

Base Metal Price, % relative 7.0
2.9
Density, g/cm3 8.0
7.9
Embodied Carbon, kg CO2/kg material 2.5
2.2
Embodied Energy, MJ/kg 36
30
Embodied Water, L/kg 59
52

Common Calculations

PREN (Pitting Resistance) 5.7
2.4
Resilience: Ultimate (Unit Rupture Work), MJ/m3 110
99
Resilience: Unit (Modulus of Resilience), kJ/m3 530
320
Stiffness to Weight: Axial, points 13
13
Stiffness to Weight: Bending, points 24
24
Strength to Weight: Axial, points 22
19
Strength to Weight: Bending, points 20
19
Thermal Diffusivity, mm2/s 11
11
Thermal Shock Resistance, points 18
16

Alloy Composition

Aluminum (Al), % 0 to 0.030
0 to 0.040
Boron (B), % 0.0010 to 0.0060
0
Carbon (C), % 0.040 to 0.1
0.1 to 0.15
Chromium (Cr), % 1.9 to 2.6
0.3 to 0.6
Copper (Cu), % 0
0 to 0.3
Iron (Fe), % 93.6 to 96.2
96.5 to 98.3
Manganese (Mn), % 0.1 to 0.6
0.4 to 0.7
Molybdenum (Mo), % 0.050 to 0.3
0.5 to 0.7
Nickel (Ni), % 0
0 to 0.3
Niobium (Nb), % 0.020 to 0.080
0
Nitrogen (N), % 0 to 0.015
0
Phosphorus (P), % 0 to 0.030
0 to 0.025
Silicon (Si), % 0 to 0.5
0.15 to 0.35
Sulfur (S), % 0 to 0.010
0 to 0.010
Titanium (Ti), % 0.0050 to 0.060
0
Tungsten (W), % 1.5 to 1.8
0
Vanadium (V), % 0.2 to 0.3
0.22 to 0.28