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R30556 Alloy vs. EN 1.7725 Steel

Both R30556 alloy and EN 1.7725 steel are iron alloys. They have a modest 32% of their average alloy composition in common, which, by itself, doesn't mean much. There are 30 material properties with values for both materials. Properties with values for just one material (4, in this case) are not shown.

For each property being compared, the top bar is R30556 alloy and the bottom bar is EN 1.7725 steel.

Metric UnitsUS Customary Units

Mechanical Properties

Elastic (Young's, Tensile) Modulus, GPa 210
190
Elongation at Break, % 45
14
Fatigue Strength, MPa 320
390 to 550
Poisson's Ratio 0.28
0.29
Shear Modulus, GPa 81
73
Tensile Strength: Ultimate (UTS), MPa 780
830 to 1000
Tensile Strength: Yield (Proof), MPa 350
610 to 860

Thermal Properties

Latent Heat of Fusion, J/g 300
250
Maximum Temperature: Mechanical, °C 1100
440
Melting Completion (Liquidus), °C 1420
1460
Melting Onset (Solidus), °C 1330
1420
Specific Heat Capacity, J/kg-K 450
470
Thermal Conductivity, W/m-K 11
39
Thermal Expansion, µm/m-K 15
13

Electrical Properties

Electrical Conductivity: Equal Volume, % IACS 1.8
7.4
Electrical Conductivity: Equal Weight (Specific), % IACS 1.9
8.6

Otherwise Unclassified Properties

Base Metal Price, % relative 70
2.9
Density, g/cm3 8.4
7.8
Embodied Carbon, kg CO2/kg material 8.7
1.8
Embodied Energy, MJ/kg 130
24
Embodied Water, L/kg 300
54

Common Calculations

PREN (Pitting Resistance) 40
2.8
Resilience: Ultimate (Unit Rupture Work), MJ/m3 290
110 to 130
Resilience: Unit (Modulus of Resilience), kJ/m3 290
980 to 1940
Stiffness to Weight: Axial, points 14
13
Stiffness to Weight: Bending, points 23
24
Strength to Weight: Axial, points 26
29 to 35
Strength to Weight: Bending, points 22
25 to 28
Thermal Diffusivity, mm2/s 2.9
11
Thermal Shock Resistance, points 18
24 to 29

Alloy Composition

Aluminum (Al), % 0.1 to 0.5
0
Boron (B), % 0 to 0.020
0
Carbon (C), % 0.050 to 0.15
0.27 to 0.34
Chromium (Cr), % 21 to 23
1.3 to 1.7
Cobalt (Co), % 16 to 21
0
Iron (Fe), % 20.4 to 38.2
95.7 to 97.5
Lanthanum (La), % 0.0050 to 0.1
0
Manganese (Mn), % 0.5 to 2.0
0.6 to 1.0
Molybdenum (Mo), % 2.5 to 4.0
0.3 to 0.5
Nickel (Ni), % 19 to 22.5
0
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 0.6
Sulfur (S), % 0 to 0.015
0 to 0.030
Tantalum (Ta), % 0.3 to 1.3
0
Tungsten (W), % 2.0 to 3.5
0
Vanadium (V), % 0
0.050 to 0.15
Zinc (Zn), % 0.0010 to 0.1
0