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EN 1.4109 Stainless Steel vs. EN 1.3551 Steel

Both EN 1.4109 stainless steel and EN 1.3551 steel are iron alloys. They have 89% of their average alloy composition in common. There are 26 material properties with values for both materials. Properties with values for just one material (7, in this case) are not shown.

For each property being compared, the top bar is EN 1.4109 stainless steel and the bottom bar is EN 1.3551 steel.

Metric UnitsUS Customary Units

Mechanical Properties

Brinell Hardness 250
220
Elastic (Young's, Tensile) Modulus, GPa 200
190
Poisson's Ratio 0.28
0.29
Shear Modulus, GPa 76
75
Tensile Strength: Ultimate (UTS), MPa 770
720

Thermal Properties

Latent Heat of Fusion, J/g 280
260
Maximum Temperature: Mechanical, °C 820
530
Melting Completion (Liquidus), °C 1440
1490
Melting Onset (Solidus), °C 1400
1450
Specific Heat Capacity, J/kg-K 480
460
Thermal Conductivity, W/m-K 30
36
Thermal Expansion, µm/m-K 10
13

Electrical Properties

Electrical Conductivity: Equal Volume, % IACS 2.7
8.6
Electrical Conductivity: Equal Weight (Specific), % IACS 3.1
9.9

Otherwise Unclassified Properties

Base Metal Price, % relative 8.5
9.0
Density, g/cm3 7.7
7.9
Embodied Carbon, kg CO2/kg material 2.2
4.9
Embodied Energy, MJ/kg 30
71
Embodied Water, L/kg 110
82

Common Calculations

PREN (Pitting Resistance) 17
18
Stiffness to Weight: Axial, points 14
14
Stiffness to Weight: Bending, points 25
24
Strength to Weight: Axial, points 28
26
Strength to Weight: Bending, points 24
23
Thermal Diffusivity, mm2/s 8.1
9.8
Thermal Shock Resistance, points 28
21

Alloy Composition

Carbon (C), % 0.6 to 0.75
0.77 to 0.85
Chromium (Cr), % 14 to 16
3.9 to 4.3
Copper (Cu), % 0
0 to 0.3
Iron (Fe), % 80.7 to 85
88.8 to 91.1
Manganese (Mn), % 0 to 1.0
0.15 to 0.35
Molybdenum (Mo), % 0.4 to 0.8
4.0 to 4.5
Phosphorus (P), % 0 to 0.040
0 to 0.025
Silicon (Si), % 0 to 0.7
0 to 0.4
Sulfur (S), % 0 to 0.015
0 to 0.015
Tungsten (W), % 0
0 to 0.25
Vanadium (V), % 0
0.9 to 1.1