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EN 1.7379 Steel vs. S21640 Stainless Steel

Both EN 1.7379 steel and S21640 stainless steel are iron alloys. They have 73% 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 1.7379 steel and the bottom bar is S21640 stainless steel.

Metric UnitsUS Customary Units

Mechanical Properties

Brinell Hardness 200
230
Elastic (Young's, Tensile) Modulus, GPa 190
200
Elongation at Break, % 21
46
Fatigue Strength, MPa 320
320
Poisson's Ratio 0.29
0.28
Shear Modulus, GPa 74
78
Tensile Strength: Ultimate (UTS), MPa 670
740
Tensile Strength: Yield (Proof), MPa 460
350

Thermal Properties

Latent Heat of Fusion, J/g 260
290
Maximum Temperature: Mechanical, °C 460
940
Melting Completion (Liquidus), °C 1470
1430
Melting Onset (Solidus), °C 1420
1380
Specific Heat Capacity, J/kg-K 470
480
Thermal Conductivity, W/m-K 39
15
Thermal Expansion, µm/m-K 13
17

Electrical Properties

Electrical Conductivity: Equal Volume, % IACS 7.6
2.4
Electrical Conductivity: Equal Weight (Specific), % IACS 8.8
2.8

Otherwise Unclassified Properties

Base Metal Price, % relative 3.8
17
Density, g/cm3 7.8
7.7
Embodied Carbon, kg CO2/kg material 1.8
3.6
Embodied Energy, MJ/kg 23
51
Embodied Water, L/kg 59
150

Common Calculations

PREN (Pitting Resistance) 5.7
26
Resilience: Ultimate (Unit Rupture Work), MJ/m3 120
280
Resilience: Unit (Modulus of Resilience), kJ/m3 550
300
Stiffness to Weight: Axial, points 13
14
Stiffness to Weight: Bending, points 24
25
Strength to Weight: Axial, points 24
27
Strength to Weight: Bending, points 22
23
Thermal Diffusivity, mm2/s 11
4.0
Thermal Shock Resistance, points 19
16

Alloy Composition

Carbon (C), % 0.13 to 0.2
0 to 0.080
Chromium (Cr), % 2.0 to 2.5
17.5 to 19.5
Iron (Fe), % 94.5 to 96.5
63 to 74.3
Manganese (Mn), % 0.5 to 0.9
3.5 to 6.5
Molybdenum (Mo), % 0.9 to 1.2
0.5 to 2.0
Nickel (Ni), % 0
4.0 to 6.5
Niobium (Nb), % 0
0.1 to 1.0
Nitrogen (N), % 0
0.080 to 0.3
Phosphorus (P), % 0 to 0.025
0 to 0.060
Silicon (Si), % 0 to 0.6
0 to 1.0
Sulfur (S), % 0 to 0.030
0 to 0.030