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EN 1.8550 Steel vs. EN 1.4646 Stainless Steel

Both EN 1.8550 steel and EN 1.4646 stainless steel are iron alloys. They have 67% of their average alloy composition in common. There are 29 material properties with values for both materials. Properties with values for just one material (5, in this case) are not shown.

For each property being compared, the top bar is EN 1.8550 steel and the bottom bar is EN 1.4646 stainless steel.

Metric UnitsUS Customary Units

Mechanical Properties

Brinell Hardness 300
220
Elastic (Young's, Tensile) Modulus, GPa 190
200
Elongation at Break, % 11
34
Fatigue Strength, MPa 470
340
Impact Strength: V-Notched Charpy, J 34
90
Poisson's Ratio 0.29
0.28
Shear Modulus, GPa 73
77
Shear Strength, MPa 600
500
Tensile Strength: Ultimate (UTS), MPa 1000
750
Tensile Strength: Yield (Proof), MPa 760
430

Thermal Properties

Latent Heat of Fusion, J/g 250
290
Maximum Temperature: Mechanical, °C 440
910
Melting Completion (Liquidus), °C 1450
1390
Melting Onset (Solidus), °C 1410
1340
Specific Heat Capacity, J/kg-K 480
480
Thermal Expansion, µm/m-K 13
17

Otherwise Unclassified Properties

Base Metal Price, % relative 3.4
13
Density, g/cm3 7.8
7.7
Embodied Carbon, kg CO2/kg material 1.7
2.8
Embodied Energy, MJ/kg 23
41
Embodied Water, L/kg 67
160

Common Calculations

PREN (Pitting Resistance) 2.3
23
Resilience: Ultimate (Unit Rupture Work), MJ/m3 100
220
Resilience: Unit (Modulus of Resilience), kJ/m3 1550
460
Stiffness to Weight: Axial, points 13
14
Stiffness to Weight: Bending, points 24
25
Strength to Weight: Axial, points 36
27
Strength to Weight: Bending, points 29
24
Thermal Shock Resistance, points 29
16

Alloy Composition

Aluminum (Al), % 0.8 to 1.2
0
Carbon (C), % 0.3 to 0.37
0.020 to 0.1
Chromium (Cr), % 1.5 to 1.8
17 to 19
Copper (Cu), % 0
1.5 to 3.0
Iron (Fe), % 94.4 to 96.3
59 to 67.3
Manganese (Mn), % 0.4 to 0.7
10.5 to 12.5
Molybdenum (Mo), % 0.15 to 0.25
0 to 0.5
Nickel (Ni), % 0.85 to 1.2
3.5 to 4.5
Nitrogen (N), % 0
0.2 to 0.3
Phosphorus (P), % 0 to 0.025
0 to 0.050
Silicon (Si), % 0 to 0.4
0 to 1.0
Sulfur (S), % 0 to 0.035
0 to 0.015