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EN 1.7380 Steel vs. S21800 Stainless Steel

Both EN 1.7380 steel and S21800 stainless steel are iron alloys. They have 65% of their average alloy composition in common. There are 28 material properties with values for both materials. Properties with values for just one material (8, in this case) are not shown.

For each property being compared, the top bar is EN 1.7380 steel and the bottom bar is S21800 stainless steel.

Metric UnitsUS Customary Units

Mechanical Properties

Brinell Hardness 160 to 170
210
Elastic (Young's, Tensile) Modulus, GPa 190
190
Elongation at Break, % 19 to 20
40
Fatigue Strength, MPa 200 to 230
330
Poisson's Ratio 0.29
0.28
Shear Modulus, GPa 74
75
Shear Strength, MPa 330 to 350
510
Tensile Strength: Ultimate (UTS), MPa 540 to 550
740
Tensile Strength: Yield (Proof), MPa 290 to 330
390

Thermal Properties

Latent Heat of Fusion, J/g 260
340
Maximum Temperature: Mechanical, °C 460
900
Melting Completion (Liquidus), °C 1470
1360
Melting Onset (Solidus), °C 1430
1310
Specific Heat Capacity, J/kg-K 470
500
Thermal Expansion, µm/m-K 13
16

Otherwise Unclassified Properties

Base Metal Price, % relative 3.8
15
Density, g/cm3 7.9
7.5
Embodied Carbon, kg CO2/kg material 1.8
3.1
Embodied Energy, MJ/kg 23
45
Embodied Water, L/kg 59
150

Common Calculations

PREN (Pitting Resistance) 5.6
19
Resilience: Ultimate (Unit Rupture Work), MJ/m3 87 to 98
250
Resilience: Unit (Modulus of Resilience), kJ/m3 230 to 280
390
Stiffness to Weight: Axial, points 13
14
Stiffness to Weight: Bending, points 24
26
Strength to Weight: Axial, points 19 to 20
27
Strength to Weight: Bending, points 19
24
Thermal Shock Resistance, points 15 to 16
17

Alloy Composition

Carbon (C), % 0.080 to 0.14
0 to 0.1
Chromium (Cr), % 2.0 to 2.5
16 to 18
Copper (Cu), % 0 to 0.3
0
Iron (Fe), % 94.6 to 96.6
59.1 to 65.4
Manganese (Mn), % 0.4 to 0.8
7.0 to 9.0
Molybdenum (Mo), % 0.9 to 1.1
0
Nickel (Ni), % 0
8.0 to 9.0
Nitrogen (N), % 0 to 0.012
0.080 to 0.18
Phosphorus (P), % 0 to 0.020
0 to 0.060
Silicon (Si), % 0 to 0.5
3.5 to 4.5
Sulfur (S), % 0 to 0.010
0 to 0.030