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EN 1.7379 Steel vs. S31266 Stainless Steel

Both EN 1.7379 steel and S31266 stainless steel are iron alloys. They have 44% of their average alloy composition in common. There are 30 material properties with values for both materials. Properties with values for just one material (5, in this case) are not shown.

For each property being compared, the top bar is EN 1.7379 steel and the bottom bar is S31266 stainless steel.

Metric UnitsUS Customary Units

Mechanical Properties

Elastic (Young's, Tensile) Modulus, GPa 190
210
Elongation at Break, % 21
40
Fatigue Strength, MPa 320
400
Poisson's Ratio 0.29
0.28
Shear Modulus, GPa 74
81
Tensile Strength: Ultimate (UTS), MPa 670
860
Tensile Strength: Yield (Proof), MPa 460
470

Thermal Properties

Latent Heat of Fusion, J/g 260
310
Maximum Temperature: Mechanical, °C 460
1100
Melting Completion (Liquidus), °C 1470
1470
Melting Onset (Solidus), °C 1420
1420
Specific Heat Capacity, J/kg-K 470
460
Thermal Conductivity, W/m-K 39
12
Thermal Expansion, µm/m-K 13
16

Electrical Properties

Electrical Conductivity: Equal Volume, % IACS 7.6
1.8
Electrical Conductivity: Equal Weight (Specific), % IACS 8.8
2.0

Otherwise Unclassified Properties

Base Metal Price, % relative 3.8
37
Density, g/cm3 7.8
8.2
Embodied Carbon, kg CO2/kg material 1.8
6.5
Embodied Energy, MJ/kg 23
89
Embodied Water, L/kg 59
220

Common Calculations

PREN (Pitting Resistance) 5.7
54
Resilience: Ultimate (Unit Rupture Work), MJ/m3 120
290
Resilience: Unit (Modulus of Resilience), kJ/m3 550
540
Stiffness to Weight: Axial, points 13
14
Stiffness to Weight: Bending, points 24
24
Strength to Weight: Axial, points 24
29
Strength to Weight: Bending, points 22
24
Thermal Diffusivity, mm2/s 11
3.1
Thermal Shock Resistance, points 19
18

Alloy Composition

Carbon (C), % 0.13 to 0.2
0 to 0.030
Chromium (Cr), % 2.0 to 2.5
23 to 25
Copper (Cu), % 0
1.0 to 2.5
Iron (Fe), % 94.5 to 96.5
34.1 to 46
Manganese (Mn), % 0.5 to 0.9
2.0 to 4.0
Molybdenum (Mo), % 0.9 to 1.2
5.2 to 6.2
Nickel (Ni), % 0
21 to 24
Nitrogen (N), % 0
0.35 to 0.6
Phosphorus (P), % 0 to 0.025
0 to 0.035
Silicon (Si), % 0 to 0.6
0 to 1.0
Sulfur (S), % 0 to 0.030
0 to 0.020
Tungsten (W), % 0
1.5 to 2.5