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EN 1.4109 Stainless Steel vs. EN 1.4518 Stainless Steel

Both EN 1.4109 stainless steel and EN 1.4518 stainless steel are iron alloys. They have 82% 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 1.4109 stainless steel and the bottom bar is EN 1.4518 stainless steel.

Metric UnitsUS Customary Units

Mechanical Properties

Elastic (Young's, Tensile) Modulus, GPa 200
200
Elongation at Break, % 19
34
Fatigue Strength, MPa 270
160
Poisson's Ratio 0.28
0.28
Shear Modulus, GPa 76
79
Tensile Strength: Ultimate (UTS), MPa 770
490
Tensile Strength: Yield (Proof), MPa 420
210

Thermal Properties

Latent Heat of Fusion, J/g 280
300
Maximum Temperature: Corrosion, °C 390
420
Maximum Temperature: Mechanical, °C 820
1000
Melting Completion (Liquidus), °C 1440
1450
Melting Onset (Solidus), °C 1400
1400
Specific Heat Capacity, J/kg-K 480
470
Thermal Conductivity, W/m-K 30
15
Thermal Expansion, µm/m-K 10
12

Electrical Properties

Electrical Conductivity: Equal Volume, % IACS 2.7
2.1
Electrical Conductivity: Equal Weight (Specific), % IACS 3.1
2.4

Otherwise Unclassified Properties

Base Metal Price, % relative 8.5
20
Density, g/cm3 7.7
7.9
Embodied Carbon, kg CO2/kg material 2.2
4.0
Embodied Energy, MJ/kg 30
55
Embodied Water, L/kg 110
160

Common Calculations

PREN (Pitting Resistance) 17
30
Resilience: Ultimate (Unit Rupture Work), MJ/m3 120
140
Resilience: Unit (Modulus of Resilience), kJ/m3 460
100
Stiffness to Weight: Axial, points 14
14
Stiffness to Weight: Bending, points 25
25
Strength to Weight: Axial, points 28
17
Strength to Weight: Bending, points 24
18
Thermal Diffusivity, mm2/s 8.1
4.1
Thermal Shock Resistance, points 28
14

Alloy Composition

Carbon (C), % 0.6 to 0.75
0 to 0.030
Chromium (Cr), % 14 to 16
18 to 20
Iron (Fe), % 80.7 to 85
61.4 to 70
Manganese (Mn), % 0 to 1.0
0 to 1.5
Molybdenum (Mo), % 0.4 to 0.8
3.0 to 3.5
Nickel (Ni), % 0
9.0 to 12
Phosphorus (P), % 0 to 0.040
0 to 0.040
Silicon (Si), % 0 to 0.7
0 to 1.5
Sulfur (S), % 0 to 0.015
0 to 0.030