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EN 1.4903 Stainless Steel vs. EN 1.8891 Steel

Both EN 1.4903 stainless steel and EN 1.8891 steel are iron alloys. They have a moderately high 90% 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 1.4903 stainless steel and the bottom bar is EN 1.8891 steel.

Metric UnitsUS Customary Units

Mechanical Properties

Elastic (Young's, Tensile) Modulus, GPa 190
190
Elongation at Break, % 20 to 21
19
Fatigue Strength, MPa 320 to 330
330
Impact Strength: V-Notched Charpy, J 42 to 46
40
Poisson's Ratio 0.28
0.29
Shear Modulus, GPa 75
73
Shear Strength, MPa 420
380
Tensile Strength: Ultimate (UTS), MPa 670 to 680
610
Tensile Strength: Yield (Proof), MPa 500
480

Thermal Properties

Latent Heat of Fusion, J/g 270
250
Maximum Temperature: Mechanical, °C 650
400
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 26
46
Thermal Expansion, µm/m-K 11
13

Electrical Properties

Electrical Conductivity: Equal Volume, % IACS 3.4
7.5
Electrical Conductivity: Equal Weight (Specific), % IACS 4.0
8.6

Otherwise Unclassified Properties

Base Metal Price, % relative 7.0
2.5
Density, g/cm3 7.8
7.8
Embodied Carbon, kg CO2/kg material 2.6
1.7
Embodied Energy, MJ/kg 36
24
Embodied Water, L/kg 88
51

Common Calculations

Resilience: Ultimate (Unit Rupture Work), MJ/m3 120 to 130
110
Resilience: Unit (Modulus of Resilience), kJ/m3 650
630
Stiffness to Weight: Axial, points 14
13
Stiffness to Weight: Bending, points 25
24
Strength to Weight: Axial, points 24
22
Strength to Weight: Bending, points 22
20
Thermal Diffusivity, mm2/s 7.0
12
Thermal Shock Resistance, points 23
18

Alloy Composition

Aluminum (Al), % 0 to 0.040
0.020 to 0.060
Carbon (C), % 0.080 to 0.12
0 to 0.2
Chromium (Cr), % 8.0 to 9.5
0 to 0.3
Copper (Cu), % 0 to 0.3
0 to 0.7
Iron (Fe), % 87.1 to 90.5
95.2 to 99
Manganese (Mn), % 0.3 to 0.6
1.0 to 1.7
Molybdenum (Mo), % 0.85 to 1.1
0 to 0.1
Nickel (Ni), % 0 to 0.4
0 to 0.8
Niobium (Nb), % 0.060 to 0.1
0 to 0.050
Nitrogen (N), % 0.030 to 0.070
0 to 0.025
Phosphorus (P), % 0 to 0.025
0 to 0.035
Silicon (Si), % 0 to 0.5
0 to 0.6
Sulfur (S), % 0 to 0.015
0 to 0.030
Titanium (Ti), % 0
0 to 0.030
Vanadium (V), % 0.18 to 0.25
0 to 0.2