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EN 1.7709 Steel vs. EN 1.4470 Stainless Steel

Both EN 1.7709 steel and EN 1.4470 stainless steel are iron alloys. They have 71% of their average alloy composition in common. There are 25 material properties with values for both materials. Properties with values for just one material (8, in this case) are not shown.

For each property being compared, the top bar is EN 1.7709 steel and the bottom bar is EN 1.4470 stainless steel.

Metric UnitsUS Customary Units

Mechanical Properties

Elastic (Young's, Tensile) Modulus, GPa 190
200
Poisson's Ratio 0.29
0.27
Shear Modulus, GPa 73
80
Tensile Strength: Ultimate (UTS), MPa 650 to 780
680

Thermal Properties

Latent Heat of Fusion, J/g 250
300
Maximum Temperature: Mechanical, °C 440
1060
Melting Completion (Liquidus), °C 1470
1450
Melting Onset (Solidus), °C 1420
1400
Specific Heat Capacity, J/kg-K 470
480
Thermal Conductivity, W/m-K 33
18
Thermal Expansion, µm/m-K 11
13

Electrical Properties

Electrical Conductivity: Equal Volume, % IACS 7.5
2.2
Electrical Conductivity: Equal Weight (Specific), % IACS 8.6
2.5

Otherwise Unclassified Properties

Base Metal Price, % relative 3.4
17
Density, g/cm3 7.8
7.8
Embodied Carbon, kg CO2/kg material 2.3
3.6
Embodied Energy, MJ/kg 32
49
Embodied Water, L/kg 56
160

Common Calculations

PREN (Pitting Resistance) 3.6
34
Stiffness to Weight: Axial, points 13
14
Stiffness to Weight: Bending, points 24
25
Strength to Weight: Axial, points 23 to 27
24
Strength to Weight: Bending, points 21 to 24
22
Thermal Diffusivity, mm2/s 8.9
4.8
Thermal Shock Resistance, points 22 to 26
18

Alloy Composition

Aluminum (Al), % 0 to 0.030
0
Carbon (C), % 0.17 to 0.25
0 to 0.030
Chromium (Cr), % 1.2 to 1.5
21 to 23
Iron (Fe), % 95.2 to 97.5
63.7 to 71.9
Manganese (Mn), % 0.4 to 0.8
0 to 2.0
Molybdenum (Mo), % 0.55 to 0.8
2.5 to 3.5
Nickel (Ni), % 0 to 0.6
4.5 to 6.5
Nitrogen (N), % 0
0.12 to 0.2
Phosphorus (P), % 0 to 0.025
0 to 0.035
Silicon (Si), % 0 to 0.4
0 to 1.0
Sulfur (S), % 0 to 0.030
0 to 0.025
Vanadium (V), % 0.2 to 0.35
0