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R30556 Alloy vs. ASTM A356 Grade 2

Both R30556 alloy and ASTM A356 grade 2 are iron alloys. They have a modest 31% of their average alloy composition in common, which, by itself, doesn't mean much. There are 29 material properties with values for both materials. Properties with values for just one material (5, in this case) are not shown.

For each property being compared, the top bar is R30556 alloy and the bottom bar is ASTM A356 grade 2.

Metric UnitsUS Customary Units

Mechanical Properties

Elastic (Young's, Tensile) Modulus, GPa 210
190
Elongation at Break, % 45
25
Fatigue Strength, MPa 320
200
Poisson's Ratio 0.28
0.29
Shear Modulus, GPa 81
73
Tensile Strength: Ultimate (UTS), MPa 780
510
Tensile Strength: Yield (Proof), MPa 350
270

Thermal Properties

Latent Heat of Fusion, J/g 300
250
Maximum Temperature: Mechanical, °C 1100
410
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
51
Thermal Expansion, µm/m-K 15
13

Electrical Properties

Electrical Conductivity: Equal Volume, % IACS 1.8
7.1
Electrical Conductivity: Equal Weight (Specific), % IACS 1.9
8.2

Otherwise Unclassified Properties

Base Metal Price, % relative 70
2.4
Density, g/cm3 8.4
7.9
Embodied Carbon, kg CO2/kg material 8.7
1.5
Embodied Energy, MJ/kg 130
20
Embodied Water, L/kg 300
47

Common Calculations

Resilience: Ultimate (Unit Rupture Work), MJ/m3 290
110
Resilience: Unit (Modulus of Resilience), kJ/m3 290
190
Stiffness to Weight: Axial, points 14
13
Stiffness to Weight: Bending, points 23
24
Strength to Weight: Axial, points 26
18
Strength to Weight: Bending, points 22
18
Thermal Diffusivity, mm2/s 2.9
14
Thermal Shock Resistance, points 18
15

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 to 0.25
Chromium (Cr), % 21 to 23
0
Cobalt (Co), % 16 to 21
0
Iron (Fe), % 20.4 to 38.2
97.7 to 99.55
Lanthanum (La), % 0.0050 to 0.1
0
Manganese (Mn), % 0.5 to 2.0
0 to 0.7
Molybdenum (Mo), % 2.5 to 4.0
0.45 to 0.65
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 0.035
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
Zinc (Zn), % 0.0010 to 0.1
0