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EN 1.4621 Stainless Steel vs. EN 1.8509 Steel

Both EN 1.4621 stainless steel and EN 1.8509 steel are iron alloys. They have 79% 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 1.4621 stainless steel and the bottom bar is EN 1.8509 steel.

Metric UnitsUS Customary Units

Mechanical Properties

Elastic (Young's, Tensile) Modulus, GPa 200
190
Elongation at Break, % 25
11
Fatigue Strength, MPa 190
580
Poisson's Ratio 0.27
0.29
Shear Modulus, GPa 78
73
Shear Strength, MPa 320
680
Tensile Strength: Ultimate (UTS), MPa 500
1130
Tensile Strength: Yield (Proof), MPa 270
940

Thermal Properties

Latent Heat of Fusion, J/g 290
250
Maximum Temperature: Mechanical, °C 970
440
Melting Completion (Liquidus), °C 1440
1450
Melting Onset (Solidus), °C 1390
1410
Specific Heat Capacity, J/kg-K 480
480
Thermal Conductivity, W/m-K 21
39
Thermal Expansion, µm/m-K 11
13

Electrical Properties

Electrical Conductivity: Equal Volume, % IACS 2.6
7.5
Electrical Conductivity: Equal Weight (Specific), % IACS 3.1
8.6

Otherwise Unclassified Properties

Base Metal Price, % relative 14
2.8
Density, g/cm3 7.7
7.8
Embodied Carbon, kg CO2/kg material 2.8
1.6
Embodied Energy, MJ/kg 41
22
Embodied Water, L/kg 140
65

Common Calculations

PREN (Pitting Resistance) 21
2.6
Resilience: Ultimate (Unit Rupture Work), MJ/m3 110
120
Resilience: Unit (Modulus of Resilience), kJ/m3 190
2340
Stiffness to Weight: Axial, points 14
13
Stiffness to Weight: Bending, points 25
25
Strength to Weight: Axial, points 18
40
Strength to Weight: Bending, points 18
31
Thermal Diffusivity, mm2/s 5.7
10
Thermal Shock Resistance, points 17
33

Alloy Composition

Aluminum (Al), % 0
0.8 to 1.2
Carbon (C), % 0 to 0.030
0.38 to 0.45
Chromium (Cr), % 20 to 21.5
1.5 to 1.8
Copper (Cu), % 0.1 to 1.0
0
Iron (Fe), % 74.4 to 79.7
95.5 to 97.1
Manganese (Mn), % 0 to 1.0
0.4 to 0.7
Molybdenum (Mo), % 0
0.2 to 0.35
Niobium (Nb), % 0.2 to 1.0
0
Nitrogen (N), % 0 to 0.030
0
Phosphorus (P), % 0 to 0.040
0 to 0.025
Silicon (Si), % 0 to 1.0
0 to 0.4
Sulfur (S), % 0 to 0.015
0 to 0.035