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EN 1.7221 Steel vs. S42030 Stainless Steel

Both EN 1.7221 steel and S42030 stainless steel are iron alloys. They have 84% of their average alloy composition in common. There are 29 material properties with values for both materials. Properties with values for just one material (5, in this case) are not shown.

For each property being compared, the top bar is EN 1.7221 steel and the bottom bar is S42030 stainless steel.

Metric UnitsUS Customary Units

Mechanical Properties

Elastic (Young's, Tensile) Modulus, GPa 190
200
Elongation at Break, % 11 to 17
16
Fatigue Strength, MPa 290 to 390
250
Poisson's Ratio 0.29
0.28
Shear Modulus, GPa 73
76
Tensile Strength: Ultimate (UTS), MPa 650 to 780
670
Tensile Strength: Yield (Proof), MPa 430 to 630
410

Thermal Properties

Latent Heat of Fusion, J/g 250
280
Maximum Temperature: Mechanical, °C 420
780
Melting Completion (Liquidus), °C 1460
1450
Melting Onset (Solidus), °C 1420
1410
Specific Heat Capacity, J/kg-K 470
470
Thermal Conductivity, W/m-K 44
28
Thermal Expansion, µm/m-K 13
10

Electrical Properties

Electrical Conductivity: Equal Volume, % IACS 7.3
2.7
Electrical Conductivity: Equal Weight (Specific), % IACS 8.4
3.1

Otherwise Unclassified Properties

Base Metal Price, % relative 2.4
10
Density, g/cm3 7.8
7.8
Embodied Carbon, kg CO2/kg material 1.5
2.5
Embodied Energy, MJ/kg 20
34
Embodied Water, L/kg 51
110

Common Calculations

Resilience: Ultimate (Unit Rupture Work), MJ/m3 83 to 98
92
Resilience: Unit (Modulus of Resilience), kJ/m3 490 to 1050
440
Stiffness to Weight: Axial, points 13
14
Stiffness to Weight: Bending, points 24
25
Strength to Weight: Axial, points 23 to 27
24
Strength to Weight: Bending, points 21 to 24
22
Thermal Diffusivity, mm2/s 12
7.7
Thermal Shock Resistance, points 19 to 23
24

Alloy Composition

Carbon (C), % 0.22 to 0.29
0 to 0.3
Chromium (Cr), % 0.8 to 1.2
12 to 14
Copper (Cu), % 0
2.0 to 3.0
Iron (Fe), % 96.8 to 98.3
77.6 to 85
Manganese (Mn), % 0.5 to 0.8
0 to 1.0
Molybdenum (Mo), % 0.15 to 0.3
1.0 to 3.0
Phosphorus (P), % 0 to 0.025
0 to 0.040
Silicon (Si), % 0 to 0.6
0 to 1.0
Sulfur (S), % 0 to 0.030
0 to 0.030