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EN 1.4981 Stainless Steel vs. EN 1.8550 Steel

Both EN 1.4981 stainless steel and EN 1.8550 steel are iron alloys. They have 67% 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 1.4981 stainless steel and the bottom bar is EN 1.8550 steel.

Metric UnitsUS Customary Units

Mechanical Properties

Brinell Hardness 190
300
Elastic (Young's, Tensile) Modulus, GPa 200
190
Elongation at Break, % 39
11
Fatigue Strength, MPa 210
470
Poisson's Ratio 0.28
0.29
Shear Modulus, GPa 77
73
Shear Strength, MPa 420
600
Tensile Strength: Ultimate (UTS), MPa 610
1000
Tensile Strength: Yield (Proof), MPa 240
760

Thermal Properties

Latent Heat of Fusion, J/g 290
250
Maximum Temperature: Mechanical, °C 940
440
Melting Completion (Liquidus), °C 1440
1450
Melting Onset (Solidus), °C 1400
1410
Specific Heat Capacity, J/kg-K 470
480
Thermal Conductivity, W/m-K 16
40
Thermal Expansion, µm/m-K 16
13

Electrical Properties

Electrical Conductivity: Equal Volume, % IACS 2.2
7.6
Electrical Conductivity: Equal Weight (Specific), % IACS 2.5
8.8

Otherwise Unclassified Properties

Base Metal Price, % relative 25
3.4
Density, g/cm3 7.9
7.8
Embodied Carbon, kg CO2/kg material 4.8
1.7
Embodied Energy, MJ/kg 67
23
Embodied Water, L/kg 150
67

Common Calculations

PREN (Pitting Resistance) 22
2.3
Resilience: Ultimate (Unit Rupture Work), MJ/m3 190
100
Resilience: Unit (Modulus of Resilience), kJ/m3 150
1550
Stiffness to Weight: Axial, points 14
13
Stiffness to Weight: Bending, points 24
24
Strength to Weight: Axial, points 21
36
Strength to Weight: Bending, points 20
29
Thermal Diffusivity, mm2/s 4.3
11
Thermal Shock Resistance, points 14
29

Alloy Composition

Aluminum (Al), % 0
0.8 to 1.2
Carbon (C), % 0.040 to 0.1
0.3 to 0.37
Chromium (Cr), % 15.5 to 17.5
1.5 to 1.8
Iron (Fe), % 59.6 to 66.7
94.4 to 96.3
Manganese (Mn), % 0 to 1.5
0.4 to 0.7
Molybdenum (Mo), % 1.6 to 2.0
0.15 to 0.25
Nickel (Ni), % 15.5 to 17.5
0.85 to 1.2
Niobium (Nb), % 0.4 to 1.2
0
Phosphorus (P), % 0 to 0.035
0 to 0.025
Silicon (Si), % 0.3 to 0.6
0 to 0.4
Sulfur (S), % 0 to 0.015
0 to 0.035