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EN 1.7729 Steel vs. EN 1.8201 Steel

Both EN 1.7729 steel and EN 1.8201 steel are iron alloys. They have a very high 97% of their average alloy composition in common. There are 33 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 1.7729 steel and the bottom bar is EN 1.8201 steel.

Metric UnitsUS Customary Units

Mechanical Properties

Brinell Hardness 270
190
Elastic (Young's, Tensile) Modulus, GPa 190
190
Elongation at Break, % 17
20
Fatigue Strength, MPa 500
310
Impact Strength: V-Notched Charpy, J 46
38
Poisson's Ratio 0.29
0.29
Shear Modulus, GPa 73
74
Shear Strength, MPa 560
390
Tensile Strength: Ultimate (UTS), MPa 910
630
Tensile Strength: Yield (Proof), MPa 750
450

Thermal Properties

Latent Heat of Fusion, J/g 250
250
Maximum Temperature: Mechanical, °C 430
450
Melting Completion (Liquidus), °C 1470
1500
Melting Onset (Solidus), °C 1430
1450
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 7.6
7.8
Electrical Conductivity: Equal Weight (Specific), % IACS 8.7
8.8

Otherwise Unclassified Properties

Base Metal Price, % relative 3.8
7.0
Density, g/cm3 7.8
8.0
Embodied Carbon, kg CO2/kg material 3.3
2.5
Embodied Energy, MJ/kg 49
36
Embodied Water, L/kg 59
59

Common Calculations

PREN (Pitting Resistance) 4.4
5.7
Resilience: Ultimate (Unit Rupture Work), MJ/m3 150
110
Resilience: Unit (Modulus of Resilience), kJ/m3 1500
530
Stiffness to Weight: Axial, points 13
13
Stiffness to Weight: Bending, points 24
24
Strength to Weight: Axial, points 32
22
Strength to Weight: Bending, points 27
20
Thermal Diffusivity, mm2/s 11
11
Thermal Shock Resistance, points 27
18

Alloy Composition

Aluminum (Al), % 0.015 to 0.080
0 to 0.030
Arsenic (As), % 0 to 0.020
0
Boron (B), % 0.0010 to 0.010
0.0010 to 0.0060
Carbon (C), % 0.17 to 0.23
0.040 to 0.1
Chromium (Cr), % 0.9 to 1.2
1.9 to 2.6
Copper (Cu), % 0 to 0.2
0
Iron (Fe), % 94.8 to 97
93.6 to 96.2
Manganese (Mn), % 0.35 to 0.75
0.1 to 0.6
Molybdenum (Mo), % 0.9 to 1.1
0.050 to 0.3
Nickel (Ni), % 0 to 0.2
0
Niobium (Nb), % 0
0.020 to 0.080
Nitrogen (N), % 0
0 to 0.015
Phosphorus (P), % 0 to 0.020
0 to 0.030
Silicon (Si), % 0 to 0.4
0 to 0.5
Sulfur (S), % 0 to 0.015
0 to 0.010
Tin (Sn), % 0 to 0.020
0
Titanium (Ti), % 0.070 to 0.15
0.0050 to 0.060
Tungsten (W), % 0
1.5 to 1.8
Vanadium (V), % 0.6 to 0.8
0.2 to 0.3