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R30556 Alloy vs. ACI-ASTM CF8M Steel

Both R30556 alloy and ACI-ASTM CF8M steel are iron alloys. They have 63% of their average alloy composition in common. There are 31 material properties with values for both materials. Properties with values for just one material (2, in this case) are not shown.

For each property being compared, the top bar is R30556 alloy and the bottom bar is ACI-ASTM CF8M steel.

Metric UnitsUS Customary Units

Mechanical Properties

Elastic (Young's, Tensile) Modulus, GPa 210
200
Elongation at Break, % 45
50
Fatigue Strength, MPa 320
280
Poisson's Ratio 0.28
0.28
Shear Modulus, GPa 81
78
Tensile Strength: Ultimate (UTS), MPa 780
540
Tensile Strength: Yield (Proof), MPa 350
290

Thermal Properties

Latent Heat of Fusion, J/g 300
300
Maximum Temperature: Corrosion, °C 450
420
Maximum Temperature: Mechanical, °C 1100
1000
Melting Completion (Liquidus), °C 1420
1440
Melting Onset (Solidus), °C 1330
1400
Specific Heat Capacity, J/kg-K 450
480
Thermal Conductivity, W/m-K 11
16
Thermal Expansion, µm/m-K 15
16

Electrical Properties

Electrical Conductivity: Equal Volume, % IACS 1.8
2.0
Electrical Conductivity: Equal Weight (Specific), % IACS 1.9
2.3

Otherwise Unclassified Properties

Base Metal Price, % relative 70
19
Density, g/cm3 8.4
7.8
Embodied Carbon, kg CO2/kg material 8.7
3.8
Embodied Energy, MJ/kg 130
53
Embodied Water, L/kg 300
160

Common Calculations

PREN (Pitting Resistance) 40
28
Resilience: Ultimate (Unit Rupture Work), MJ/m3 290
230
Resilience: Unit (Modulus of Resilience), kJ/m3 290
210
Stiffness to Weight: Axial, points 14
14
Stiffness to Weight: Bending, points 23
25
Strength to Weight: Axial, points 26
19
Strength to Weight: Bending, points 22
19
Thermal Diffusivity, mm2/s 2.9
4.3
Thermal Shock Resistance, points 18
12

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 0.080
Chromium (Cr), % 21 to 23
18 to 21
Cobalt (Co), % 16 to 21
0
Iron (Fe), % 20.4 to 38.2
60.3 to 71
Lanthanum (La), % 0.0050 to 0.1
0
Manganese (Mn), % 0.5 to 2.0
0 to 1.5
Molybdenum (Mo), % 2.5 to 4.0
2.0 to 3.0
Nickel (Ni), % 19 to 22.5
9.0 to 12
Niobium (Nb), % 0 to 0.3
0
Nitrogen (N), % 0.1 to 0.3
0
Phosphorus (P), % 0 to 0.040
0 to 0.040
Silicon (Si), % 0.2 to 0.8
0 to 2.0
Sulfur (S), % 0 to 0.015
0 to 0.040
Tantalum (Ta), % 0.3 to 1.3
0
Tungsten (W), % 2.0 to 3.5
0
Zinc (Zn), % 0.0010 to 0.1
0