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EN 1.8550 Steel vs. EN 1.4371 Stainless Steel

Both EN 1.8550 steel and EN 1.4371 stainless steel are iron alloys. They have 74% of their average alloy composition in common. There are 32 material properties with values for both materials. Properties with values for just one material (2, 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 1.4371 stainless steel.

Metric UnitsUS Customary Units

Mechanical Properties

Brinell Hardness 300
220 to 230
Elastic (Young's, Tensile) Modulus, GPa 190
200
Elongation at Break, % 11
45 to 51
Fatigue Strength, MPa 470
290 to 340
Poisson's Ratio 0.29
0.28
Shear Modulus, GPa 73
77
Shear Strength, MPa 600
520 to 540
Tensile Strength: Ultimate (UTS), MPa 1000
740 to 750
Tensile Strength: Yield (Proof), MPa 760
320 to 340

Thermal Properties

Latent Heat of Fusion, J/g 250
280
Maximum Temperature: Mechanical, °C 440
880
Melting Completion (Liquidus), °C 1450
1410
Melting Onset (Solidus), °C 1410
1370
Specific Heat Capacity, J/kg-K 480
480
Thermal Conductivity, W/m-K 40
15
Thermal Expansion, µm/m-K 13
17

Electrical Properties

Electrical Conductivity: Equal Volume, % IACS 7.6
2.5
Electrical Conductivity: Equal Weight (Specific), % IACS 8.8
2.9

Otherwise Unclassified Properties

Base Metal Price, % relative 3.4
12
Density, g/cm3 7.8
7.7
Embodied Carbon, kg CO2/kg material 1.7
2.6
Embodied Energy, MJ/kg 23
38
Embodied Water, L/kg 67
140

Common Calculations

PREN (Pitting Resistance) 2.3
20
Resilience: Ultimate (Unit Rupture Work), MJ/m3 100
270 to 310
Resilience: Unit (Modulus of Resilience), kJ/m3 1550
250 to 300
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 Diffusivity, mm2/s 11
4.0
Thermal Shock Resistance, points 29
16

Alloy Composition

Aluminum (Al), % 0.8 to 1.2
0
Carbon (C), % 0.3 to 0.37
0 to 0.030
Chromium (Cr), % 1.5 to 1.8
16 to 17.5
Copper (Cu), % 0
0 to 1.0
Iron (Fe), % 94.4 to 96.3
66.7 to 74.4
Manganese (Mn), % 0.4 to 0.7
6.0 to 8.0
Molybdenum (Mo), % 0.15 to 0.25
0
Nickel (Ni), % 0.85 to 1.2
3.5 to 5.5
Nitrogen (N), % 0
0.15 to 0.25
Phosphorus (P), % 0 to 0.025
0 to 0.045
Silicon (Si), % 0 to 0.4
0 to 1.0
Sulfur (S), % 0 to 0.035
0 to 0.015