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EN 1.1221 Steel vs. S32750 Stainless Steel

Both EN 1.1221 steel and S32750 stainless steel are iron alloys. They have 64% of their average alloy composition in common. There are 31 material properties with values for both materials. Properties with values for just one material (3, in this case) are not shown.

For each property being compared, the top bar is EN 1.1221 steel and the bottom bar is S32750 stainless steel.

Metric UnitsUS Customary Units

Mechanical Properties

Brinell Hardness 210 to 250
270
Elastic (Young's, Tensile) Modulus, GPa 190
210
Elongation at Break, % 10 to 21
17
Fatigue Strength, MPa 240 to 340
360
Poisson's Ratio 0.29
0.27
Shear Modulus, GPa 72
81
Shear Strength, MPa 450 to 520
530
Tensile Strength: Ultimate (UTS), MPa 730 to 870
860
Tensile Strength: Yield (Proof), MPa 390 to 550
590

Thermal Properties

Latent Heat of Fusion, J/g 250
300
Maximum Temperature: Mechanical, °C 400
1100
Melting Completion (Liquidus), °C 1460
1450
Melting Onset (Solidus), °C 1410
1400
Specific Heat Capacity, J/kg-K 470
480
Thermal Conductivity, W/m-K 48
15
Thermal Expansion, µm/m-K 12
12

Electrical Properties

Electrical Conductivity: Equal Volume, % IACS 7.2
2.2
Electrical Conductivity: Equal Weight (Specific), % IACS 8.3
2.5

Otherwise Unclassified Properties

Base Metal Price, % relative 2.1
21
Density, g/cm3 7.8
7.8
Embodied Carbon, kg CO2/kg material 1.5
4.1
Embodied Energy, MJ/kg 19
56
Embodied Water, L/kg 47
180

Common Calculations

Resilience: Ultimate (Unit Rupture Work), MJ/m3 67 to 130
130
Resilience: Unit (Modulus of Resilience), kJ/m3 410 to 800
860
Stiffness to Weight: Axial, points 13
15
Stiffness to Weight: Bending, points 24
25
Strength to Weight: Axial, points 26 to 31
31
Strength to Weight: Bending, points 23 to 26
26
Thermal Diffusivity, mm2/s 13
4.0
Thermal Shock Resistance, points 23 to 28
25

Alloy Composition

Carbon (C), % 0.57 to 0.65
0 to 0.030
Chromium (Cr), % 0 to 0.4
24 to 26
Copper (Cu), % 0
0 to 0.5
Iron (Fe), % 97.1 to 98.8
58.1 to 66.8
Manganese (Mn), % 0.6 to 0.9
0 to 1.2
Molybdenum (Mo), % 0 to 0.1
3.0 to 5.0
Nickel (Ni), % 0 to 0.4
6.0 to 8.0
Nitrogen (N), % 0
0.24 to 0.32
Phosphorus (P), % 0 to 0.035
0 to 0.035
Silicon (Si), % 0 to 0.4
0 to 0.8
Sulfur (S), % 0 to 0.035
0 to 0.020