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R30556 Alloy vs. EN 1.8550 Steel

Both R30556 alloy and EN 1.8550 steel are iron alloys. They have a modest 33% of their average alloy composition in common, which, by itself, doesn't mean much. 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 R30556 alloy and the bottom bar is EN 1.8550 steel.

Metric UnitsUS Customary Units

Mechanical Properties

Elastic (Young's, Tensile) Modulus, GPa 210
190
Elongation at Break, % 45
11
Fatigue Strength, MPa 320
470
Poisson's Ratio 0.28
0.29
Shear Modulus, GPa 81
73
Shear Strength, MPa 550
600
Tensile Strength: Ultimate (UTS), MPa 780
1000
Tensile Strength: Yield (Proof), MPa 350
760

Thermal Properties

Latent Heat of Fusion, J/g 300
250
Maximum Temperature: Mechanical, °C 1100
440
Melting Completion (Liquidus), °C 1420
1450
Melting Onset (Solidus), °C 1330
1410
Specific Heat Capacity, J/kg-K 450
480
Thermal Conductivity, W/m-K 11
40
Thermal Expansion, µm/m-K 15
13

Electrical Properties

Electrical Conductivity: Equal Volume, % IACS 1.8
7.6
Electrical Conductivity: Equal Weight (Specific), % IACS 1.9
8.8

Otherwise Unclassified Properties

Base Metal Price, % relative 70
3.4
Density, g/cm3 8.4
7.8
Embodied Carbon, kg CO2/kg material 8.7
1.7
Embodied Energy, MJ/kg 130
23
Embodied Water, L/kg 300
67

Common Calculations

PREN (Pitting Resistance) 40
2.3
Resilience: Ultimate (Unit Rupture Work), MJ/m3 290
100
Resilience: Unit (Modulus of Resilience), kJ/m3 290
1550
Stiffness to Weight: Axial, points 14
13
Stiffness to Weight: Bending, points 23
24
Strength to Weight: Axial, points 26
36
Strength to Weight: Bending, points 22
29
Thermal Diffusivity, mm2/s 2.9
11
Thermal Shock Resistance, points 18
29

Alloy Composition

Aluminum (Al), % 0.1 to 0.5
0.8 to 1.2
Boron (B), % 0 to 0.020
0
Carbon (C), % 0.050 to 0.15
0.3 to 0.37
Chromium (Cr), % 21 to 23
1.5 to 1.8
Cobalt (Co), % 16 to 21
0
Iron (Fe), % 20.4 to 38.2
94.4 to 96.3
Lanthanum (La), % 0.0050 to 0.1
0
Manganese (Mn), % 0.5 to 2.0
0.4 to 0.7
Molybdenum (Mo), % 2.5 to 4.0
0.15 to 0.25
Nickel (Ni), % 19 to 22.5
0.85 to 1.2
Niobium (Nb), % 0 to 0.3
0
Nitrogen (N), % 0.1 to 0.3
0
Phosphorus (P), % 0 to 0.040
0 to 0.025
Silicon (Si), % 0.2 to 0.8
0 to 0.4
Sulfur (S), % 0 to 0.015
0 to 0.035
Tantalum (Ta), % 0.3 to 1.3
0
Tungsten (W), % 2.0 to 3.5
0
Zinc (Zn), % 0.0010 to 0.1
0