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EN 1.7139 Steel vs. EN 1.8159 Steel

Both EN 1.7139 steel and EN 1.8159 steel are iron alloys. Their average alloy composition is basically identical.

For each property being compared, the top bar is EN 1.7139 steel and the bottom bar is EN 1.8159 steel.

Metric UnitsUS Customary Units

Mechanical Properties

Brinell Hardness 150 to 180
200 to 360
Elastic (Young's, Tensile) Modulus, GPa 190
190
Poisson's Ratio 0.29
0.29
Shear Modulus, GPa 73
73
Tensile Strength: Ultimate (UTS), MPa 480 to 1390
660 to 1980

Thermal Properties

Latent Heat of Fusion, J/g 250
250
Maximum Temperature: Mechanical, °C 420
420
Melting Completion (Liquidus), °C 1460
1460
Melting Onset (Solidus), °C 1420
1410
Specific Heat Capacity, J/kg-K 470
470
Thermal Conductivity, W/m-K 44
46
Thermal Expansion, µm/m-K 13
13

Electrical Properties

Electrical Conductivity: Equal Volume, % IACS 7.3
7.3
Electrical Conductivity: Equal Weight (Specific), % IACS 8.3
8.4

Otherwise Unclassified Properties

Base Metal Price, % relative 2.2
2.3
Density, g/cm3 7.8
7.8
Embodied Carbon, kg CO2/kg material 1.4
1.9
Embodied Energy, MJ/kg 19
26
Embodied Water, L/kg 51
52

Common Calculations

Stiffness to Weight: Axial, points 13
13
Stiffness to Weight: Bending, points 24
24
Strength to Weight: Axial, points 17 to 49
23 to 70
Strength to Weight: Bending, points 17 to 35
21 to 45
Thermal Diffusivity, mm2/s 12
13
Thermal Shock Resistance, points 14 to 41
19 to 58

Alloy Composition

Carbon (C), % 0.14 to 0.19
0.47 to 0.55
Chromium (Cr), % 0.8 to 1.1
0.9 to 1.2
Copper (Cu), % 0 to 0.25
0
Iron (Fe), % 96.8 to 98
96.4 to 97.8
Manganese (Mn), % 1.0 to 1.3
0.7 to 1.1
Phosphorus (P), % 0 to 0.025
0 to 0.035
Silicon (Si), % 0 to 0.3
0 to 0.4
Sulfur (S), % 0.020 to 0.040
0 to 0.035
Vanadium (V), % 0
0.1 to 0.25

Comparable Variants