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EN 1.7227 Steel vs. EN 1.7202 Steel

Both EN 1.7227 steel and EN 1.7202 steel are iron alloys. Their average alloy composition is basically identical.

For each property being compared, the top bar is EN 1.7227 steel and the bottom bar is EN 1.7202 steel.

Metric UnitsUS Customary Units

Mechanical Properties

Elastic (Young's, Tensile) Modulus, GPa 190
190
Poisson's Ratio 0.29
0.29
Rockwell C Hardness 50 to 57
48 to 56
Shear Modulus, GPa 73
73
Tensile Strength: Ultimate (UTS), MPa 540 to 1850
530 to 1810

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
2.5
Density, g/cm3 7.8
7.8
Embodied Carbon, kg CO2/kg material 1.5
1.5
Embodied Energy, MJ/kg 20
20
Embodied Water, L/kg 51
51

Common Calculations

Stiffness to Weight: Axial, points 13
13
Stiffness to Weight: Bending, points 24
24
Strength to Weight: Axial, points 19 to 65
19 to 64
Strength to Weight: Bending, points 19 to 43
19 to 42
Thermal Diffusivity, mm2/s 12
12
Thermal Shock Resistance, points 16 to 54
16 to 53

Alloy Composition

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

Comparable Variants