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R30556 Alloy vs. ASTM A369 Grade FP91

Both R30556 alloy and ASTM A369 grade FP91 are iron alloys. They have 40% 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 ASTM A369 grade FP91.

Metric UnitsUS Customary Units

Mechanical Properties

Elastic (Young's, Tensile) Modulus, GPa 210
190
Elongation at Break, % 45
19
Fatigue Strength, MPa 320
320
Poisson's Ratio 0.28
0.28
Shear Modulus, GPa 81
75
Shear Strength, MPa 550
410
Tensile Strength: Ultimate (UTS), MPa 780
670
Tensile Strength: Yield (Proof), MPa 350
460

Thermal Properties

Latent Heat of Fusion, J/g 300
270
Maximum Temperature: Mechanical, °C 1100
600
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
26
Thermal Expansion, µm/m-K 15
13

Electrical Properties

Electrical Conductivity: Equal Volume, % IACS 1.8
8.9
Electrical Conductivity: Equal Weight (Specific), % IACS 1.9
10

Otherwise Unclassified Properties

Base Metal Price, % relative 70
7.0
Density, g/cm3 8.4
7.8
Embodied Carbon, kg CO2/kg material 8.7
2.6
Embodied Energy, MJ/kg 130
37
Embodied Water, L/kg 300
88

Common Calculations

PREN (Pitting Resistance) 40
13
Resilience: Ultimate (Unit Rupture Work), MJ/m3 290
110
Resilience: Unit (Modulus of Resilience), kJ/m3 290
560
Stiffness to Weight: Axial, points 14
14
Stiffness to Weight: Bending, points 23
25
Strength to Weight: Axial, points 26
24
Strength to Weight: Bending, points 22
22
Thermal Diffusivity, mm2/s 2.9
6.9
Thermal Shock Resistance, points 18
18

Alloy Composition

Aluminum (Al), % 0.1 to 0.5
0 to 0.020
Boron (B), % 0 to 0.020
0
Carbon (C), % 0.050 to 0.15
0.080 to 0.12
Chromium (Cr), % 21 to 23
8.0 to 9.5
Cobalt (Co), % 16 to 21
0
Iron (Fe), % 20.4 to 38.2
87.3 to 90.3
Lanthanum (La), % 0.0050 to 0.1
0
Manganese (Mn), % 0.5 to 2.0
0.3 to 0.6
Molybdenum (Mo), % 2.5 to 4.0
0.85 to 1.1
Nickel (Ni), % 19 to 22.5
0 to 0.4
Niobium (Nb), % 0 to 0.3
0.060 to 0.1
Nitrogen (N), % 0.1 to 0.3
0.030 to 0.070
Phosphorus (P), % 0 to 0.040
0 to 0.025
Silicon (Si), % 0.2 to 0.8
0.2 to 0.5
Sulfur (S), % 0 to 0.015
0 to 0.025
Tantalum (Ta), % 0.3 to 1.3
0
Titanium (Ti), % 0
0 to 0.010
Tungsten (W), % 2.0 to 3.5
0
Vanadium (V), % 0
0.18 to 0.25
Zinc (Zn), % 0.0010 to 0.1
0
Zirconium (Zr), % 0
0 to 0.010