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EN 1.8151 Steel vs. EN 1.7139 Steel

Both EN 1.8151 steel and EN 1.7139 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 1.8151 steel and the bottom bar is EN 1.7139 steel.

Metric UnitsUS Customary Units

Mechanical Properties

Brinell Hardness 200 to 540
150 to 180
Elastic (Young's, Tensile) Modulus, GPa 190
190
Poisson's Ratio 0.29
0.29
Shear Modulus, GPa 72
73
Tensile Strength: Ultimate (UTS), MPa 670 to 1940
480 to 1390

Thermal Properties

Latent Heat of Fusion, J/g 270
250
Maximum Temperature: Mechanical, °C 410
420
Melting Completion (Liquidus), °C 1440
1460
Melting Onset (Solidus), °C 1400
1420
Specific Heat Capacity, J/kg-K 480
470
Thermal Conductivity, W/m-K 50
44
Thermal Expansion, µm/m-K 13
13

Electrical Properties

Electrical Conductivity: Equal Volume, % IACS 7.4
7.3
Electrical Conductivity: Equal Weight (Specific), % IACS 8.6
8.3

Otherwise Unclassified Properties

Base Metal Price, % relative 2.2
2.2
Density, g/cm3 7.7
7.8
Embodied Carbon, kg CO2/kg material 1.8
1.4
Embodied Energy, MJ/kg 25
19
Embodied Water, L/kg 49
51

Common Calculations

Stiffness to Weight: Axial, points 13
13
Stiffness to Weight: Bending, points 25
24
Strength to Weight: Axial, points 24 to 70
17 to 49
Strength to Weight: Bending, points 22 to 45
17 to 35
Thermal Diffusivity, mm2/s 14
12
Thermal Shock Resistance, points 20 to 58
14 to 41

Alloy Composition

Carbon (C), % 0.4 to 0.5
0.14 to 0.19
Chromium (Cr), % 0.4 to 0.8
0.8 to 1.1
Copper (Cu), % 0
0 to 0.25
Iron (Fe), % 95.9 to 97.2
96.8 to 98
Manganese (Mn), % 0.6 to 0.9
1.0 to 1.3
Phosphorus (P), % 0 to 0.025
0 to 0.025
Silicon (Si), % 1.3 to 1.7
0 to 0.3
Sulfur (S), % 0 to 0.025
0.020 to 0.040
Vanadium (V), % 0.1 to 0.2
0

Comparable Variants