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EN 1.7221 Steel vs. S39274 Stainless Steel

Both EN 1.7221 steel and S39274 stainless steel are iron alloys. They have 63% of their average alloy composition in common. There are 30 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 1.7221 steel and the bottom bar is S39274 stainless steel.

Metric UnitsUS Customary Units

Mechanical Properties

Brinell Hardness 200 to 230
270
Elastic (Young's, Tensile) Modulus, GPa 190
210
Elongation at Break, % 11 to 17
17
Fatigue Strength, MPa 290 to 390
380
Poisson's Ratio 0.29
0.27
Shear Modulus, GPa 73
81
Tensile Strength: Ultimate (UTS), MPa 650 to 780
900
Tensile Strength: Yield (Proof), MPa 430 to 630
620

Thermal Properties

Latent Heat of Fusion, J/g 250
300
Maximum Temperature: Mechanical, °C 420
1100
Melting Completion (Liquidus), °C 1460
1480
Melting Onset (Solidus), °C 1420
1430
Specific Heat Capacity, J/kg-K 470
470
Thermal Conductivity, W/m-K 44
16
Thermal Expansion, µm/m-K 13
13

Electrical Properties

Electrical Conductivity: Equal Volume, % IACS 7.3
2.2
Electrical Conductivity: Equal Weight (Specific), % IACS 8.4
2.4

Otherwise Unclassified Properties

Base Metal Price, % relative 2.4
24
Density, g/cm3 7.8
8.0
Embodied Carbon, kg CO2/kg material 1.5
4.3
Embodied Energy, MJ/kg 20
60
Embodied Water, L/kg 51
180

Common Calculations

Resilience: Ultimate (Unit Rupture Work), MJ/m3 83 to 98
140
Resilience: Unit (Modulus of Resilience), kJ/m3 490 to 1050
940
Stiffness to Weight: Axial, points 13
14
Stiffness to Weight: Bending, points 24
25
Strength to Weight: Axial, points 23 to 27
32
Strength to Weight: Bending, points 21 to 24
26
Thermal Diffusivity, mm2/s 12
4.2
Thermal Shock Resistance, points 19 to 23
25

Alloy Composition

Carbon (C), % 0.22 to 0.29
0 to 0.030
Chromium (Cr), % 0.8 to 1.2
24 to 26
Copper (Cu), % 0
0.2 to 0.8
Iron (Fe), % 96.8 to 98.3
57 to 65.6
Manganese (Mn), % 0.5 to 0.8
0 to 1.0
Molybdenum (Mo), % 0.15 to 0.3
2.5 to 3.5
Nickel (Ni), % 0
6.0 to 8.0
Nitrogen (N), % 0
0.24 to 0.32
Phosphorus (P), % 0 to 0.025
0 to 0.030
Silicon (Si), % 0 to 0.6
0 to 0.8
Sulfur (S), % 0 to 0.030
0 to 0.020
Tungsten (W), % 0
1.5 to 2.5