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EN 1.8151 Steel vs. EN 1.7225 Steel

Both EN 1.8151 steel and EN 1.7225 steel are iron alloys. They have a very high 99% 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 1.7225 steel.

Metric UnitsUS Customary Units

Mechanical Properties

Brinell Hardness 200 to 540
160 to 300
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
540 to 1850

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
46
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
8.4

Otherwise Unclassified Properties

Base Metal Price, % relative 2.2
2.5
Density, g/cm3 7.7
7.8
Embodied Carbon, kg CO2/kg material 1.8
1.5
Embodied Energy, MJ/kg 25
20
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
19 to 65
Strength to Weight: Bending, points 22 to 45
19 to 43
Thermal Diffusivity, mm2/s 14
12
Thermal Shock Resistance, points 20 to 58
16 to 54

Alloy Composition

Carbon (C), % 0.4 to 0.5
0.38 to 0.45
Chromium (Cr), % 0.4 to 0.8
0.9 to 1.2
Copper (Cu), % 0
0 to 0.25
Iron (Fe), % 95.9 to 97.2
96.6 to 98
Manganese (Mn), % 0.6 to 0.9
0.6 to 0.9
Molybdenum (Mo), % 0
0.15 to 0.3
Phosphorus (P), % 0 to 0.025
0 to 0.035
Silicon (Si), % 1.3 to 1.7
0 to 0.4
Sulfur (S), % 0 to 0.025
0 to 0.035
Vanadium (V), % 0.1 to 0.2
0

Comparable Variants