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EN 1.4618 Stainless Steel vs. EN 1.3551 Steel

Both EN 1.4618 stainless steel and EN 1.3551 steel are iron alloys. They have 72% of their average alloy composition in common. There are 26 material properties with values for both materials. Properties with values for just one material (8, in this case) are not shown.

For each property being compared, the top bar is EN 1.4618 stainless steel and the bottom bar is EN 1.3551 steel.

Metric UnitsUS Customary Units

Mechanical Properties

Brinell Hardness 200 to 210
220
Elastic (Young's, Tensile) Modulus, GPa 200
190
Poisson's Ratio 0.28
0.29
Shear Modulus, GPa 77
75
Tensile Strength: Ultimate (UTS), MPa 680 to 700
720

Thermal Properties

Latent Heat of Fusion, J/g 280
260
Maximum Temperature: Mechanical, °C 900
530
Melting Completion (Liquidus), °C 1400
1490
Melting Onset (Solidus), °C 1360
1450
Specific Heat Capacity, J/kg-K 480
460
Thermal Conductivity, W/m-K 15
36
Thermal Expansion, µm/m-K 16
13

Electrical Properties

Electrical Conductivity: Equal Volume, % IACS 2.4
8.6
Electrical Conductivity: Equal Weight (Specific), % IACS 2.7
9.9

Otherwise Unclassified Properties

Base Metal Price, % relative 13
9.0
Density, g/cm3 7.7
7.9
Embodied Carbon, kg CO2/kg material 2.7
4.9
Embodied Energy, MJ/kg 39
71
Embodied Water, L/kg 150
82

Common Calculations

PREN (Pitting Resistance) 19
18
Stiffness to Weight: Axial, points 14
14
Stiffness to Weight: Bending, points 25
24
Strength to Weight: Axial, points 24 to 25
26
Strength to Weight: Bending, points 22 to 23
23
Thermal Diffusivity, mm2/s 4.0
9.8
Thermal Shock Resistance, points 15 to 16
21

Alloy Composition

Carbon (C), % 0 to 0.1
0.77 to 0.85
Chromium (Cr), % 16.5 to 18.5
3.9 to 4.3
Copper (Cu), % 1.0 to 2.5
0 to 0.3
Iron (Fe), % 62.7 to 72.5
88.8 to 91.1
Manganese (Mn), % 5.5 to 9.5
0.15 to 0.35
Molybdenum (Mo), % 0
4.0 to 4.5
Nickel (Ni), % 4.5 to 5.5
0
Nitrogen (N), % 0 to 0.15
0
Phosphorus (P), % 0 to 0.070
0 to 0.025
Silicon (Si), % 0 to 1.0
0 to 0.4
Sulfur (S), % 0 to 0.010
0 to 0.015
Tungsten (W), % 0
0 to 0.25
Vanadium (V), % 0
0.9 to 1.1