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EN 1.7707 Steel vs. EN 1.8201 Steel

Both EN 1.7707 steel and EN 1.8201 steel are iron alloys. They have a very high 98% of their average alloy composition in common.

For each property being compared, the top bar is EN 1.7707 steel and the bottom bar is EN 1.8201 steel.

Metric UnitsUS Customary Units

Mechanical Properties

Brinell Hardness 300
190
Elastic (Young's, Tensile) Modulus, GPa 190
190
Elongation at Break, % 11
20
Fatigue Strength, MPa 500
310
Impact Strength: V-Notched Charpy, J 31
38
Poisson's Ratio 0.29
0.29
Shear Modulus, GPa 73
74
Shear Strength, MPa 600
390
Tensile Strength: Ultimate (UTS), MPa 1010
630
Tensile Strength: Yield (Proof), MPa 800
450

Thermal Properties

Latent Heat of Fusion, J/g 250
250
Maximum Temperature: Mechanical, °C 460
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 7.6
7.8
Electrical Conductivity: Equal Weight (Specific), % IACS 8.7
8.8

Otherwise Unclassified Properties

Base Metal Price, % relative 3.3
7.0
Density, g/cm3 7.8
8.0
Embodied Carbon, kg CO2/kg material 1.9
2.5
Embodied Energy, MJ/kg 27
36
Embodied Water, L/kg 58
59

Common Calculations

PREN (Pitting Resistance) 3.2
5.7
Resilience: Ultimate (Unit Rupture Work), MJ/m3 110
110
Resilience: Unit (Modulus of Resilience), kJ/m3 1690
530
Stiffness to Weight: Axial, points 13
13
Stiffness to Weight: Bending, points 24
24
Strength to Weight: Axial, points 36
22
Strength to Weight: Bending, points 29
20
Thermal Diffusivity, mm2/s 11
11
Thermal Shock Resistance, points 29
18

Alloy Composition

Aluminum (Al), % 0
0 to 0.030
Boron (B), % 0
0.0010 to 0.0060
Carbon (C), % 0.26 to 0.34
0.040 to 0.1
Chromium (Cr), % 2.3 to 2.7
1.9 to 2.6
Iron (Fe), % 94.7 to 96.8
93.6 to 96.2
Manganese (Mn), % 0.4 to 0.7
0.1 to 0.6
Molybdenum (Mo), % 0.15 to 0.25
0.050 to 0.3
Nickel (Ni), % 0 to 0.6
0
Niobium (Nb), % 0
0.020 to 0.080
Nitrogen (N), % 0
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), % 0.1 to 0.2
0.2 to 0.3