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EN 1.6781 Steel vs. S38815 Stainless Steel

Both EN 1.6781 steel and S38815 stainless steel are iron alloys. They have 68% of their average alloy composition in common. There are 27 material properties with values for both materials. Properties with values for just one material (6, in this case) are not shown.

For each property being compared, the top bar is EN 1.6781 steel and the bottom bar is S38815 stainless steel.

Metric UnitsUS Customary Units

Mechanical Properties

Brinell Hardness 250
190
Elastic (Young's, Tensile) Modulus, GPa 190
190
Elongation at Break, % 17
34
Fatigue Strength, MPa 450
230
Poisson's Ratio 0.29
0.29
Shear Modulus, GPa 73
74
Tensile Strength: Ultimate (UTS), MPa 830
610
Tensile Strength: Yield (Proof), MPa 680
290

Thermal Properties

Latent Heat of Fusion, J/g 260
370
Maximum Temperature: Mechanical, °C 450
860
Melting Completion (Liquidus), °C 1460
1360
Melting Onset (Solidus), °C 1420
1310
Specific Heat Capacity, J/kg-K 470
500
Thermal Expansion, µm/m-K 13
15

Otherwise Unclassified Properties

Base Metal Price, % relative 5.0
19
Density, g/cm3 7.9
7.5
Embodied Carbon, kg CO2/kg material 1.9
3.8
Embodied Energy, MJ/kg 25
54
Embodied Water, L/kg 60
140

Common Calculations

PREN (Pitting Resistance) 3.3
18
Resilience: Ultimate (Unit Rupture Work), MJ/m3 130
170
Resilience: Unit (Modulus of Resilience), kJ/m3 1220
220
Stiffness to Weight: Axial, points 13
14
Stiffness to Weight: Bending, points 24
25
Strength to Weight: Axial, points 29
22
Strength to Weight: Bending, points 25
21
Thermal Shock Resistance, points 24
15

Alloy Composition

Aluminum (Al), % 0
0 to 0.3
Carbon (C), % 0.15 to 0.19
0 to 0.030
Chromium (Cr), % 1.3 to 1.8
13 to 15
Copper (Cu), % 0
0.75 to 1.5
Iron (Fe), % 92.6 to 94.6
56.1 to 67
Manganese (Mn), % 0.55 to 0.8
0 to 2.0
Molybdenum (Mo), % 0.45 to 0.6
0.75 to 1.5
Nickel (Ni), % 3.0 to 3.5
13 to 17
Phosphorus (P), % 0 to 0.015
0 to 0.040
Silicon (Si), % 0 to 0.5
5.5 to 6.5
Sulfur (S), % 0 to 0.015
0 to 0.020