EN 1.7227 Steel vs. EN 1.4740 Stainless Steel

Both EN 1.7227 steel and EN 1.4740 stainless steel are iron alloys. They have 81% of their average alloy composition in common. There are 20 material properties with values for both materials. Properties with values for just one material (9, in this case) are not shown.

For each property being compared, the top bar is EN 1.7227 steel and the bottom bar is EN 1.4740 stainless steel.

EN 1.7227 (42CrMoS4) Chromium-Molybdenum Steel EN 1.4740 (GX40CrSi17) Cast Stainless Steel

Metric UnitsUS Customary Units

Mechanical Properties

Elastic (Young's, Tensile) Modulus, GPa		190
Elastic (Young's, Tensile) Modulus, GPa		200

Poisson's Ratio		0.29
Poisson's Ratio		0.28

Shear Modulus, GPa		73
Shear Modulus, GPa		77

Thermal Properties

Latent Heat of Fusion, J/g		250
Latent Heat of Fusion, J/g		300

Maximum Temperature: Mechanical, °C		420
Maximum Temperature: Mechanical, °C		900

Melting Completion (Liquidus), °C		1460
Melting Completion (Liquidus), °C		1420

Melting Onset (Solidus), °C		1420
Melting Onset (Solidus), °C		1370

Specific Heat Capacity, J/kg-K		470
Specific Heat Capacity, J/kg-K		490

Thermal Conductivity, W/m-K		46
Thermal Conductivity, W/m-K		18

Thermal Expansion, µm/m-K		13
Thermal Expansion, µm/m-K		10

Electrical Properties

Electrical Conductivity: Equal Volume, % IACS		7.3
Electrical Conductivity: Equal Volume, % IACS		2.2

Electrical Conductivity: Equal Weight (Specific), % IACS		8.4
Electrical Conductivity: Equal Weight (Specific), % IACS		2.6

Otherwise Unclassified Properties

Base Metal Price, % relative		2.5
Base Metal Price, % relative		9.5

Density, g/cm³		7.8
Density, g/cm³		7.6

Embodied Carbon, kg CO₂/kg material		1.5
Embodied Carbon, kg CO₂/kg material		2.3

Embodied Energy, MJ/kg		20
Embodied Energy, MJ/kg		32

Embodied Water, L/kg		51
Embodied Water, L/kg		120

Common Calculations

Stiffness to Weight: Axial, points		13
Stiffness to Weight: Axial, points		14

Stiffness to Weight: Bending, points		24
Stiffness to Weight: Bending, points		25

Thermal Diffusivity, mm²/s		12
Thermal Diffusivity, mm²/s		4.8

Alloy Composition

Carbon (C), %		0.38 to 0.45
Carbon (C), %		0.3 to 0.5

Chromium (Cr), %		0.9 to 1.2
Chromium (Cr), %		16 to 19

Copper (Cu), %		0 to 0.25
Copper (Cu), %		0

Iron (Fe), %		96.5 to 98
Iron (Fe), %		75.4 to 82.7

Manganese (Mn), %		0.6 to 0.9
Manganese (Mn), %		0 to 1.0

Molybdenum (Mo), %		0.15 to 0.3
Molybdenum (Mo), %		0 to 0.5

Nickel (Ni), %		0
Nickel (Ni), %		0 to 1.0

Phosphorus (P), %		0 to 0.025
Phosphorus (P), %		0 to 0.040

Silicon (Si), %		0 to 0.3
Silicon (Si), %		1.0 to 2.5

Sulfur (S), %		0.020 to 0.040
Sulfur (S), %		0 to 0.030