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EN 1.7709 Steel vs. EN 1.4415 Stainless Steel

Both EN 1.7709 steel and EN 1.4415 stainless steel are iron alloys. They have 82% of their average alloy composition in common. There are 25 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 1.7709 steel and the bottom bar is EN 1.4415 stainless steel.

Metric UnitsUS Customary Units

Mechanical Properties

Elastic (Young's, Tensile) Modulus, GPa 190
200
Poisson's Ratio 0.29
0.28
Shear Modulus, GPa 73
77
Tensile Strength: Ultimate (UTS), MPa 650 to 780
830 to 930

Thermal Properties

Latent Heat of Fusion, J/g 250
280
Maximum Temperature: Mechanical, °C 440
790
Melting Completion (Liquidus), °C 1470
1460
Melting Onset (Solidus), °C 1420
1420
Specific Heat Capacity, J/kg-K 470
470
Thermal Conductivity, W/m-K 33
19
Thermal Expansion, µm/m-K 11
9.9

Electrical Properties

Electrical Conductivity: Equal Volume, % IACS 7.5
2.4
Electrical Conductivity: Equal Weight (Specific), % IACS 8.6
2.8

Otherwise Unclassified Properties

Base Metal Price, % relative 3.4
13
Density, g/cm3 7.8
7.9
Embodied Carbon, kg CO2/kg material 2.3
3.6
Embodied Energy, MJ/kg 32
51
Embodied Water, L/kg 56
120

Common Calculations

PREN (Pitting Resistance) 3.6
19
Stiffness to Weight: Axial, points 13
14
Stiffness to Weight: Bending, points 24
25
Strength to Weight: Axial, points 23 to 27
29 to 33
Strength to Weight: Bending, points 21 to 24
25 to 27
Thermal Diffusivity, mm2/s 8.9
5.1
Thermal Shock Resistance, points 22 to 26
30 to 34

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
11.5 to 13.5
Iron (Fe), % 95.2 to 97.5
75.9 to 82.4
Manganese (Mn), % 0.4 to 0.8
0 to 0.5
Molybdenum (Mo), % 0.55 to 0.8
1.5 to 2.5
Nickel (Ni), % 0 to 0.6
4.5 to 6.5
Phosphorus (P), % 0 to 0.025
0 to 0.040
Silicon (Si), % 0 to 0.4
0 to 0.5
Sulfur (S), % 0 to 0.030
0 to 0.015
Titanium (Ti), % 0
0 to 0.010
Vanadium (V), % 0.2 to 0.35
0.1 to 0.5