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EN 1.7709 Steel vs. S31727 Stainless Steel

Both EN 1.7709 steel and S31727 stainless steel are iron alloys. They have 61% of their average alloy composition in common. There are 22 material properties with values for both materials. Properties with values for just one material (13, in this case) are not shown.

For each property being compared, the top bar is EN 1.7709 steel and the bottom bar is S31727 stainless steel.

Metric UnitsUS Customary Units

Mechanical Properties

Brinell Hardness 200 to 230
190
Elastic (Young's, Tensile) Modulus, GPa 190
200
Poisson's Ratio 0.29
0.28
Shear Modulus, GPa 73
78
Tensile Strength: Ultimate (UTS), MPa 650 to 780
630

Thermal Properties

Latent Heat of Fusion, J/g 250
290
Maximum Temperature: Mechanical, °C 440
1010
Melting Completion (Liquidus), °C 1470
1440
Melting Onset (Solidus), °C 1420
1390
Specific Heat Capacity, J/kg-K 470
470
Thermal Expansion, µm/m-K 11
16

Otherwise Unclassified Properties

Base Metal Price, % relative 3.4
24
Density, g/cm3 7.8
8.0
Embodied Carbon, kg CO2/kg material 2.3
4.7
Embodied Energy, MJ/kg 32
64
Embodied Water, L/kg 56
180

Common Calculations

PREN (Pitting Resistance) 3.6
35
Stiffness to Weight: Axial, points 13
14
Stiffness to Weight: Bending, points 24
24
Strength to Weight: Axial, points 23 to 27
22
Strength to Weight: Bending, points 21 to 24
20
Thermal Shock Resistance, points 22 to 26
14

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
17.5 to 19
Copper (Cu), % 0
2.8 to 4.0
Iron (Fe), % 95.2 to 97.5
53.7 to 61.3
Manganese (Mn), % 0.4 to 0.8
0 to 1.0
Molybdenum (Mo), % 0.55 to 0.8
3.8 to 4.5
Nickel (Ni), % 0 to 0.6
14.5 to 16.5
Nitrogen (N), % 0
0.15 to 0.21
Phosphorus (P), % 0 to 0.025
0 to 0.030
Silicon (Si), % 0 to 0.4
0 to 1.0
Sulfur (S), % 0 to 0.030
0 to 0.030
Vanadium (V), % 0.2 to 0.35
0