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EN 1.6580 Steel vs. S31655 Stainless Steel

Both EN 1.6580 steel and S31655 stainless steel are iron alloys. They have 73% of their average alloy composition in common. There are 32 material properties with values for both materials. Properties with values for just one material (2, in this case) are not shown.

For each property being compared, the top bar is EN 1.6580 steel and the bottom bar is S31655 stainless steel.

Metric UnitsUS Customary Units

Mechanical Properties

Brinell Hardness 220 to 350
210
Elastic (Young's, Tensile) Modulus, GPa 190
200
Elongation at Break, % 11 to 19
39
Fatigue Strength, MPa 310 to 610
300
Poisson's Ratio 0.29
0.28
Shear Modulus, GPa 73
78
Shear Strength, MPa 450 to 700
490
Tensile Strength: Ultimate (UTS), MPa 720 to 1170
710
Tensile Strength: Yield (Proof), MPa 460 to 990
350

Thermal Properties

Latent Heat of Fusion, J/g 250
290
Maximum Temperature: Mechanical, °C 450
1010
Melting Completion (Liquidus), °C 1460
1430
Melting Onset (Solidus), °C 1420
1380
Specific Heat Capacity, J/kg-K 470
480
Thermal Conductivity, W/m-K 40
15
Thermal Expansion, µm/m-K 13
16

Electrical Properties

Electrical Conductivity: Equal Volume, % IACS 7.8
2.4
Electrical Conductivity: Equal Weight (Specific), % IACS 8.9
2.7

Otherwise Unclassified Properties

Base Metal Price, % relative 4.3
17
Density, g/cm3 7.9
7.8
Embodied Carbon, kg CO2/kg material 1.8
3.3
Embodied Energy, MJ/kg 23
46
Embodied Water, L/kg 59
160

Common Calculations

PREN (Pitting Resistance) 3.3
27
Resilience: Ultimate (Unit Rupture Work), MJ/m3 120 to 130
230
Resilience: Unit (Modulus of Resilience), kJ/m3 560 to 2590
310
Stiffness to Weight: Axial, points 13
14
Stiffness to Weight: Bending, points 24
25
Strength to Weight: Axial, points 26 to 41
25
Strength to Weight: Bending, points 23 to 31
23
Thermal Diffusivity, mm2/s 11
4.0
Thermal Shock Resistance, points 21 to 34
16

Alloy Composition

Carbon (C), % 0.26 to 0.34
0 to 0.030
Chromium (Cr), % 1.8 to 2.2
19.5 to 21.5
Copper (Cu), % 0
0 to 1.0
Iron (Fe), % 93.7 to 95.5
63.2 to 71.9
Manganese (Mn), % 0.3 to 0.6
0 to 2.0
Molybdenum (Mo), % 0.3 to 0.5
0.5 to 1.5
Nickel (Ni), % 1.8 to 2.2
8.0 to 9.5
Nitrogen (N), % 0
0.14 to 0.25
Phosphorus (P), % 0 to 0.035
0 to 0.045
Silicon (Si), % 0 to 0.4
0 to 1.0
Sulfur (S), % 0 to 0.035
0 to 0.015