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EN 1.7225 Steel vs. EN 1.7149 Steel

Both EN 1.7225 steel and EN 1.7149 steel are iron alloys. Their average alloy composition is basically identical.

For each property being compared, the top bar is EN 1.7225 steel and the bottom bar is EN 1.7149 steel.

Metric UnitsUS Customary Units

Mechanical Properties

Brinell Hardness 160 to 300
150 to 180
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 540 to 1850
500 to 1460

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
1420
Specific Heat Capacity, J/kg-K 470
470
Thermal Conductivity, W/m-K 46
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 8.4
8.4

Otherwise Unclassified Properties

Base Metal Price, % relative 2.5
2.3
Density, g/cm3 7.8
7.8
Embodied Carbon, kg CO2/kg material 1.5
1.5
Embodied Energy, MJ/kg 20
19
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 19 to 65
18 to 52
Strength to Weight: Bending, points 19 to 43
18 to 36
Thermal Diffusivity, mm2/s 12
12
Thermal Shock Resistance, points 16 to 54
15 to 42

Alloy Composition

Carbon (C), % 0.38 to 0.45
0.17 to 0.22
Chromium (Cr), % 0.9 to 1.2
1.0 to 1.3
Copper (Cu), % 0 to 0.25
0 to 0.25
Iron (Fe), % 96.6 to 98
96.5 to 97.7
Manganese (Mn), % 0.6 to 0.9
1.1 to 1.4
Molybdenum (Mo), % 0.15 to 0.3
0
Phosphorus (P), % 0 to 0.035
0 to 0.025
Silicon (Si), % 0 to 0.4
0 to 0.3
Sulfur (S), % 0 to 0.035
0.020 to 0.040

Comparable Variants