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EN 1.4509 Stainless Steel vs. EN 1.8918 Steel

Both EN 1.4509 stainless steel and EN 1.8918 steel are iron alloys. They have 81% 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 1.4509 stainless steel and the bottom bar is EN 1.8918 steel.

Metric UnitsUS Customary Units

Mechanical Properties

Brinell Hardness 180
190
Elastic (Young's, Tensile) Modulus, GPa 200
190
Elongation at Break, % 21
19
Fatigue Strength, MPa 170
330
Poisson's Ratio 0.28
0.29
Shear Modulus, GPa 77
73
Shear Strength, MPa 330
400
Tensile Strength: Ultimate (UTS), MPa 530
640
Tensile Strength: Yield (Proof), MPa 260
490

Thermal Properties

Latent Heat of Fusion, J/g 280
250
Maximum Temperature: Mechanical, °C 890
400
Melting Completion (Liquidus), °C 1440
1460
Melting Onset (Solidus), °C 1400
1420
Specific Heat Capacity, J/kg-K 480
470
Thermal Conductivity, W/m-K 25
46
Thermal Expansion, µm/m-K 10
13

Electrical Properties

Electrical Conductivity: Equal Volume, % IACS 2.9
7.5
Electrical Conductivity: Equal Weight (Specific), % IACS 3.4
8.6

Otherwise Unclassified Properties

Base Metal Price, % relative 13
2.5
Density, g/cm3 7.7
7.8
Embodied Carbon, kg CO2/kg material 2.8
1.7
Embodied Energy, MJ/kg 41
24
Embodied Water, L/kg 120
51

Common Calculations

Resilience: Ultimate (Unit Rupture Work), MJ/m3 90
110
Resilience: Unit (Modulus of Resilience), kJ/m3 180
640
Stiffness to Weight: Axial, points 14
13
Stiffness to Weight: Bending, points 25
24
Strength to Weight: Axial, points 19
23
Strength to Weight: Bending, points 19
21
Thermal Diffusivity, mm2/s 6.8
12
Thermal Shock Resistance, points 19
19

Alloy Composition

Aluminum (Al), % 0
0.020 to 0.050
Carbon (C), % 0 to 0.030
0 to 0.2
Chromium (Cr), % 17.5 to 18.5
0 to 0.3
Copper (Cu), % 0
0 to 0.7
Iron (Fe), % 77.8 to 82.1
95.2 to 98.9
Manganese (Mn), % 0 to 1.0
1.1 to 1.7
Molybdenum (Mo), % 0
0 to 0.1
Nickel (Ni), % 0
0 to 0.8
Niobium (Nb), % 0.3 to 1.0
0 to 0.050
Nitrogen (N), % 0
0 to 0.025
Phosphorus (P), % 0 to 0.040
0 to 0.020
Silicon (Si), % 0 to 1.0
0 to 0.6
Sulfur (S), % 0 to 0.015
0 to 0.0050
Titanium (Ti), % 0.1 to 0.6
0 to 0.030
Vanadium (V), % 0
0 to 0.2