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EN 1.4938 Stainless Steel vs. EN 1.8874 Steel

Both EN 1.4938 stainless steel and EN 1.8874 steel are iron alloys. They have 85% of their average alloy composition in common. There are 30 material properties with values for both materials. Properties with values for just one material (4, in this case) are not shown.

For each property being compared, the top bar is EN 1.4938 stainless steel and the bottom bar is EN 1.8874 steel.

Metric UnitsUS Customary Units

Mechanical Properties

Elastic (Young's, Tensile) Modulus, GPa 200
190
Elongation at Break, % 16 to 17
19
Fatigue Strength, MPa 390 to 520
340
Poisson's Ratio 0.28
0.29
Shear Modulus, GPa 76
73
Shear Strength, MPa 540 to 630
410
Tensile Strength: Ultimate (UTS), MPa 870 to 1030
660
Tensile Strength: Yield (Proof), MPa 640 to 870
500

Thermal Properties

Latent Heat of Fusion, J/g 270
250
Maximum Temperature: Mechanical, °C 750
420
Melting Completion (Liquidus), °C 1460
1460
Melting Onset (Solidus), °C 1420
1420
Specific Heat Capacity, J/kg-K 470
470
Thermal Conductivity, W/m-K 30
39
Thermal Expansion, µm/m-K 11
13

Electrical Properties

Electrical Conductivity: Equal Volume, % IACS 2.9
7.8
Electrical Conductivity: Equal Weight (Specific), % IACS 3.3
8.9

Otherwise Unclassified Properties

Base Metal Price, % relative 10
3.2
Density, g/cm3 7.8
7.9
Embodied Carbon, kg CO2/kg material 3.3
1.8
Embodied Energy, MJ/kg 47
24
Embodied Water, L/kg 110
52

Common Calculations

Resilience: Ultimate (Unit Rupture Work), MJ/m3 140 to 160
120
Resilience: Unit (Modulus of Resilience), kJ/m3 1050 to 1920
670
Stiffness to Weight: Axial, points 14
13
Stiffness to Weight: Bending, points 25
24
Strength to Weight: Axial, points 31 to 37
23
Strength to Weight: Bending, points 26 to 29
21
Thermal Diffusivity, mm2/s 8.1
10
Thermal Shock Resistance, points 30 to 35
19

Alloy Composition

Boron (B), % 0
0 to 0.0050
Carbon (C), % 0.080 to 0.15
0 to 0.18
Chromium (Cr), % 11 to 12.5
0 to 1.0
Copper (Cu), % 0
0 to 0.3
Iron (Fe), % 80.5 to 84.8
93.6 to 100
Manganese (Mn), % 0.4 to 0.9
0 to 1.7
Molybdenum (Mo), % 1.5 to 2.0
0 to 0.7
Nickel (Ni), % 2.0 to 3.0
0 to 1.5
Niobium (Nb), % 0
0 to 0.050
Nitrogen (N), % 0.020 to 0.040
0 to 0.015
Phosphorus (P), % 0 to 0.025
0 to 0.025
Silicon (Si), % 0 to 0.5
0 to 0.6
Sulfur (S), % 0 to 0.015
0 to 0.010
Titanium (Ti), % 0
0 to 0.050
Vanadium (V), % 0.25 to 0.4
0 to 0.080
Zirconium (Zr), % 0
0 to 0.15