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EN 1.1221 Steel vs. S38815 Stainless Steel

Both EN 1.1221 steel and S38815 stainless steel are iron alloys. They have 63% 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 1.1221 steel and the bottom bar is S38815 stainless steel.

Metric UnitsUS Customary Units

Mechanical Properties

Brinell Hardness 210 to 250
190
Elastic (Young's, Tensile) Modulus, GPa 190
190
Elongation at Break, % 10 to 21
34
Fatigue Strength, MPa 240 to 340
230
Poisson's Ratio 0.29
0.29
Shear Modulus, GPa 72
74
Shear Strength, MPa 450 to 520
410
Tensile Strength: Ultimate (UTS), MPa 730 to 870
610
Tensile Strength: Yield (Proof), MPa 390 to 550
290

Thermal Properties

Latent Heat of Fusion, J/g 250
370
Maximum Temperature: Mechanical, °C 400
860
Melting Completion (Liquidus), °C 1460
1360
Melting Onset (Solidus), °C 1410
1310
Specific Heat Capacity, J/kg-K 470
500
Thermal Expansion, µm/m-K 12
15

Otherwise Unclassified Properties

Base Metal Price, % relative 2.1
19
Density, g/cm3 7.8
7.5
Embodied Carbon, kg CO2/kg material 1.5
3.8
Embodied Energy, MJ/kg 19
54
Embodied Water, L/kg 47
140

Common Calculations

Resilience: Ultimate (Unit Rupture Work), MJ/m3 67 to 130
170
Resilience: Unit (Modulus of Resilience), kJ/m3 410 to 800
220
Stiffness to Weight: Axial, points 13
14
Stiffness to Weight: Bending, points 24
25
Strength to Weight: Axial, points 26 to 31
22
Strength to Weight: Bending, points 23 to 26
21
Thermal Shock Resistance, points 23 to 28
15

Alloy Composition

Aluminum (Al), % 0
0 to 0.3
Carbon (C), % 0.57 to 0.65
0 to 0.030
Chromium (Cr), % 0 to 0.4
13 to 15
Copper (Cu), % 0
0.75 to 1.5
Iron (Fe), % 97.1 to 98.8
56.1 to 67
Manganese (Mn), % 0.6 to 0.9
0 to 2.0
Molybdenum (Mo), % 0 to 0.1
0.75 to 1.5
Nickel (Ni), % 0 to 0.4
13 to 17
Phosphorus (P), % 0 to 0.035
0 to 0.040
Silicon (Si), % 0 to 0.4
5.5 to 6.5
Sulfur (S), % 0 to 0.035
0 to 0.020