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EN 1.4439 Stainless Steel vs. EN 1.8509 Steel

Both EN 1.4439 stainless steel and EN 1.8509 steel are iron alloys. They have 66% of their average alloy composition in common. There are 33 material properties with values for both materials. Properties with values for just one material (1, in this case) are not shown.

For each property being compared, the top bar is EN 1.4439 stainless steel and the bottom bar is EN 1.8509 steel.

Metric UnitsUS Customary Units

Mechanical Properties

Brinell Hardness 220
340
Elastic (Young's, Tensile) Modulus, GPa 200
190
Elongation at Break, % 40
11
Fatigue Strength, MPa 270
580
Impact Strength: V-Notched Charpy, J 90
29
Poisson's Ratio 0.28
0.29
Shear Modulus, GPa 79
73
Shear Strength, MPa 470
680
Tensile Strength: Ultimate (UTS), MPa 680
1130
Tensile Strength: Yield (Proof), MPa 310
940

Thermal Properties

Latent Heat of Fusion, J/g 290
250
Maximum Temperature: Mechanical, °C 980
440
Melting Completion (Liquidus), °C 1460
1450
Melting Onset (Solidus), °C 1410
1410
Specific Heat Capacity, J/kg-K 470
480
Thermal Conductivity, W/m-K 14
39
Thermal Expansion, µm/m-K 16
13

Electrical Properties

Electrical Conductivity: Equal Volume, % IACS 2.0
7.5
Electrical Conductivity: Equal Weight (Specific), % IACS 2.3
8.6

Otherwise Unclassified Properties

Base Metal Price, % relative 22
2.8
Density, g/cm3 7.9
7.8
Embodied Carbon, kg CO2/kg material 4.5
1.6
Embodied Energy, MJ/kg 61
22
Embodied Water, L/kg 160
65

Common Calculations

PREN (Pitting Resistance) 35
2.6
Resilience: Ultimate (Unit Rupture Work), MJ/m3 220
120
Resilience: Unit (Modulus of Resilience), kJ/m3 240
2340
Stiffness to Weight: Axial, points 14
13
Stiffness to Weight: Bending, points 25
25
Strength to Weight: Axial, points 24
40
Strength to Weight: Bending, points 22
31
Thermal Diffusivity, mm2/s 3.8
10
Thermal Shock Resistance, points 15
33

Alloy Composition

Aluminum (Al), % 0
0.8 to 1.2
Carbon (C), % 0 to 0.030
0.38 to 0.45
Chromium (Cr), % 16.5 to 18.5
1.5 to 1.8
Iron (Fe), % 58.7 to 66.9
95.5 to 97.1
Manganese (Mn), % 0 to 2.0
0.4 to 0.7
Molybdenum (Mo), % 4.0 to 5.0
0.2 to 0.35
Nickel (Ni), % 12.5 to 14.5
0
Nitrogen (N), % 0.12 to 0.22
0
Phosphorus (P), % 0 to 0.045
0 to 0.025
Silicon (Si), % 0 to 1.0
0 to 0.4
Sulfur (S), % 0 to 0.015
0 to 0.035