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R30556 Alloy vs. EN 1.7729 Steel

Both R30556 alloy and EN 1.7729 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 31 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 1.7729 steel.

Metric UnitsUS Customary Units

Mechanical Properties

Elastic (Young's, Tensile) Modulus, GPa 210
190
Elongation at Break, % 45
17
Fatigue Strength, MPa 320
500
Poisson's Ratio 0.28
0.29
Shear Modulus, GPa 81
73
Shear Strength, MPa 550
560
Tensile Strength: Ultimate (UTS), MPa 780
910
Tensile Strength: Yield (Proof), MPa 350
750

Thermal Properties

Latent Heat of Fusion, J/g 300
250
Maximum Temperature: Mechanical, °C 1100
430
Melting Completion (Liquidus), °C 1420
1470
Melting Onset (Solidus), °C 1330
1430
Specific Heat Capacity, J/kg-K 450
470
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
8.7

Otherwise Unclassified Properties

Base Metal Price, % relative 70
3.8
Density, g/cm3 8.4
7.8
Embodied Carbon, kg CO2/kg material 8.7
3.3
Embodied Energy, MJ/kg 130
49
Embodied Water, L/kg 300
59

Common Calculations

PREN (Pitting Resistance) 40
4.4
Resilience: Ultimate (Unit Rupture Work), MJ/m3 290
150
Resilience: Unit (Modulus of Resilience), kJ/m3 290
1500
Stiffness to Weight: Axial, points 14
13
Stiffness to Weight: Bending, points 23
24
Strength to Weight: Axial, points 26
32
Strength to Weight: Bending, points 22
27
Thermal Diffusivity, mm2/s 2.9
11
Thermal Shock Resistance, points 18
27

Alloy Composition

Aluminum (Al), % 0.1 to 0.5
0.015 to 0.080
Arsenic (As), % 0
0 to 0.020
Boron (B), % 0 to 0.020
0.0010 to 0.010
Carbon (C), % 0.050 to 0.15
0.17 to 0.23
Chromium (Cr), % 21 to 23
0.9 to 1.2
Cobalt (Co), % 16 to 21
0
Copper (Cu), % 0
0 to 0.2
Iron (Fe), % 20.4 to 38.2
94.8 to 97
Lanthanum (La), % 0.0050 to 0.1
0
Manganese (Mn), % 0.5 to 2.0
0.35 to 0.75
Molybdenum (Mo), % 2.5 to 4.0
0.9 to 1.1
Nickel (Ni), % 19 to 22.5
0 to 0.2
Niobium (Nb), % 0 to 0.3
0
Nitrogen (N), % 0.1 to 0.3
0
Phosphorus (P), % 0 to 0.040
0 to 0.020
Silicon (Si), % 0.2 to 0.8
0 to 0.4
Sulfur (S), % 0 to 0.015
0 to 0.015
Tantalum (Ta), % 0.3 to 1.3
0
Tin (Sn), % 0
0 to 0.020
Titanium (Ti), % 0
0.070 to 0.15
Tungsten (W), % 2.0 to 3.5
0
Vanadium (V), % 0
0.6 to 0.8
Zinc (Zn), % 0.0010 to 0.1
0