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EN 1.7220 Steel vs. S17400 Stainless Steel

Both EN 1.7220 steel and S17400 stainless steel are iron alloys. They have 76% of their average alloy composition in common. There are 26 material properties with values for both materials. Properties with values for just one material (10, in this case) are not shown.

For each property being compared, the top bar is EN 1.7220 steel and the bottom bar is S17400 stainless steel.

Metric UnitsUS Customary Units

Mechanical Properties

Brinell Hardness 160 to 290
280 to 440
Elastic (Young's, Tensile) Modulus, GPa 190
190
Poisson's Ratio 0.29
0.28
Rockwell C Hardness 45 to 53
27 to 43
Shear Modulus, GPa 73
75
Tensile Strength: Ultimate (UTS), MPa 520 to 1720
910 to 1390

Thermal Properties

Latent Heat of Fusion, J/g 250
280
Maximum Temperature: Mechanical, °C 420
850
Melting Completion (Liquidus), °C 1460
1440
Melting Onset (Solidus), °C 1420
1400
Specific Heat Capacity, J/kg-K 470
480
Thermal Conductivity, W/m-K 44
17
Thermal Expansion, µm/m-K 13
11

Electrical Properties

Electrical Conductivity: Equal Volume, % IACS 7.3
2.3
Electrical Conductivity: Equal Weight (Specific), % IACS 8.4
2.6

Otherwise Unclassified Properties

Base Metal Price, % relative 2.5
14
Density, g/cm3 7.8
7.8
Embodied Carbon, kg CO2/kg material 1.5
2.7
Embodied Energy, MJ/kg 20
39
Embodied Water, L/kg 51
130

Common Calculations

Stiffness to Weight: Axial, points 13
14
Stiffness to Weight: Bending, points 24
25
Strength to Weight: Axial, points 18 to 61
32 to 49
Strength to Weight: Bending, points 18 to 41
27 to 35
Thermal Diffusivity, mm2/s 12
4.5
Thermal Shock Resistance, points 15 to 50
30 to 46

Alloy Composition

Carbon (C), % 0.3 to 0.37
0 to 0.070
Chromium (Cr), % 0.9 to 1.2
15 to 17
Copper (Cu), % 0
3.0 to 5.0
Iron (Fe), % 96.8 to 98.1
70.4 to 78.9
Manganese (Mn), % 0.6 to 0.9
0 to 1.0
Molybdenum (Mo), % 0.15 to 0.3
0
Nickel (Ni), % 0
3.0 to 5.0
Niobium (Nb), % 0
0.15 to 0.45
Phosphorus (P), % 0 to 0.035
0 to 0.040
Silicon (Si), % 0 to 0.4
0 to 1.0
Sulfur (S), % 0 to 0.035
0 to 0.030