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EN 1.7709 Steel vs. S31277 Stainless Steel

Both EN 1.7709 steel and S31277 stainless steel are iron alloys. They have 44% of their average alloy composition in common. There are 21 material properties with values for both materials. Properties with values for just one material (12, in this case) are not shown.

For each property being compared, the top bar is EN 1.7709 steel and the bottom bar is S31277 stainless steel.

Metric UnitsUS Customary Units

Mechanical Properties

Elastic (Young's, Tensile) Modulus, GPa 190
210
Poisson's Ratio 0.29
0.28
Shear Modulus, GPa 73
80
Tensile Strength: Ultimate (UTS), MPa 650 to 780
860

Thermal Properties

Latent Heat of Fusion, J/g 250
310
Maximum Temperature: Mechanical, °C 440
1100
Melting Completion (Liquidus), °C 1470
1460
Melting Onset (Solidus), °C 1420
1410
Specific Heat Capacity, J/kg-K 470
460
Thermal Expansion, µm/m-K 11
16

Otherwise Unclassified Properties

Base Metal Price, % relative 3.4
36
Density, g/cm3 7.8
8.1
Embodied Carbon, kg CO2/kg material 2.3
6.7
Embodied Energy, MJ/kg 32
90
Embodied Water, L/kg 56
220

Common Calculations

PREN (Pitting Resistance) 3.6
51
Stiffness to Weight: Axial, points 13
14
Stiffness to Weight: Bending, points 24
24
Strength to Weight: Axial, points 23 to 27
29
Strength to Weight: Bending, points 21 to 24
25
Thermal Shock Resistance, points 22 to 26
19

Alloy Composition

Aluminum (Al), % 0 to 0.030
0
Carbon (C), % 0.17 to 0.25
0 to 0.020
Chromium (Cr), % 1.2 to 1.5
20.5 to 23
Copper (Cu), % 0
0.5 to 1.5
Iron (Fe), % 95.2 to 97.5
35.5 to 46.2
Manganese (Mn), % 0.4 to 0.8
0 to 3.0
Molybdenum (Mo), % 0.55 to 0.8
6.5 to 8.0
Nickel (Ni), % 0 to 0.6
26 to 28
Nitrogen (N), % 0
0.3 to 0.4
Phosphorus (P), % 0 to 0.025
0 to 0.030
Silicon (Si), % 0 to 0.4
0 to 0.5
Sulfur (S), % 0 to 0.030
0 to 0.010
Vanadium (V), % 0.2 to 0.35
0