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EN 1.0303 Steel vs. EN 1.8550 Steel

Both EN 1.0303 steel and EN 1.8550 steel are iron alloys. They have a very high 96% 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 1.0303 steel and the bottom bar is EN 1.8550 steel.

Metric UnitsUS Customary Units

Mechanical Properties

Brinell Hardness 84 to 120
300
Elastic (Young's, Tensile) Modulus, GPa 190
190
Elongation at Break, % 12 to 25
11
Fatigue Strength, MPa 150 to 230
470
Poisson's Ratio 0.29
0.29
Shear Modulus, GPa 73
73
Shear Strength, MPa 220 to 260
600
Tensile Strength: Ultimate (UTS), MPa 290 to 410
1000
Tensile Strength: Yield (Proof), MPa 200 to 320
760

Thermal Properties

Latent Heat of Fusion, J/g 250
250
Maximum Temperature: Mechanical, °C 400
440
Melting Completion (Liquidus), °C 1470
1450
Melting Onset (Solidus), °C 1430
1410
Specific Heat Capacity, J/kg-K 470
480
Thermal Conductivity, W/m-K 53
40
Thermal Expansion, µm/m-K 12
13

Electrical Properties

Electrical Conductivity: Equal Volume, % IACS 6.9
7.6
Electrical Conductivity: Equal Weight (Specific), % IACS 7.9
8.8

Otherwise Unclassified Properties

Base Metal Price, % relative 1.8
3.4
Density, g/cm3 7.9
7.8
Embodied Carbon, kg CO2/kg material 1.4
1.7
Embodied Energy, MJ/kg 18
23
Embodied Water, L/kg 46
67

Common Calculations

Resilience: Ultimate (Unit Rupture Work), MJ/m3 30 to 94
100
Resilience: Unit (Modulus of Resilience), kJ/m3 110 to 270
1550
Stiffness to Weight: Axial, points 13
13
Stiffness to Weight: Bending, points 24
24
Strength to Weight: Axial, points 10 to 15
36
Strength to Weight: Bending, points 12 to 16
29
Thermal Diffusivity, mm2/s 14
11
Thermal Shock Resistance, points 9.2 to 13
29

Alloy Composition

Aluminum (Al), % 0.020 to 0.060
0.8 to 1.2
Carbon (C), % 0.020 to 0.060
0.3 to 0.37
Chromium (Cr), % 0
1.5 to 1.8
Iron (Fe), % 99.335 to 99.71
94.4 to 96.3
Manganese (Mn), % 0.25 to 0.4
0.4 to 0.7
Molybdenum (Mo), % 0
0.15 to 0.25
Nickel (Ni), % 0
0.85 to 1.2
Phosphorus (P), % 0 to 0.020
0 to 0.025
Silicon (Si), % 0 to 0.1
0 to 0.4
Sulfur (S), % 0 to 0.025
0 to 0.035