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ASTM A369 Grade FP91 vs. AWS E309

Both ASTM A369 grade FP91 and AWS E309 are iron alloys. They have 71% of their average alloy composition in common. There are 25 material properties with values for both materials. Properties with values for just one material (7, in this case) are not shown.

For each property being compared, the top bar is ASTM A369 grade FP91 and the bottom bar is AWS E309.

Metric UnitsUS Customary Units

Mechanical Properties

Elastic (Young's, Tensile) Modulus, GPa 190
200
Elongation at Break, % 19
34
Poisson's Ratio 0.28
0.27
Shear Modulus, GPa 75
78
Tensile Strength: Ultimate (UTS), MPa 670
620

Thermal Properties

Latent Heat of Fusion, J/g 270
300
Melting Completion (Liquidus), °C 1460
1410
Melting Onset (Solidus), °C 1420
1370
Specific Heat Capacity, J/kg-K 470
480
Thermal Conductivity, W/m-K 26
15
Thermal Expansion, µm/m-K 13
14

Electrical Properties

Electrical Conductivity: Equal Volume, % IACS 8.9
2.1
Electrical Conductivity: Equal Weight (Specific), % IACS 10
2.5

Otherwise Unclassified Properties

Base Metal Price, % relative 7.0
20
Density, g/cm3 7.8
7.8
Embodied Carbon, kg CO2/kg material 2.6
3.7
Embodied Energy, MJ/kg 37
52
Embodied Water, L/kg 88
180

Common Calculations

PREN (Pitting Resistance) 13
25
Stiffness to Weight: Axial, points 14
14
Stiffness to Weight: Bending, points 25
25
Strength to Weight: Axial, points 24
22
Strength to Weight: Bending, points 22
21
Thermal Diffusivity, mm2/s 6.9
4.0
Thermal Shock Resistance, points 18
16

Alloy Composition

Aluminum (Al), % 0 to 0.020
0
Carbon (C), % 0.080 to 0.12
0 to 0.15
Chromium (Cr), % 8.0 to 9.5
22 to 25
Copper (Cu), % 0
0 to 0.75
Iron (Fe), % 87.3 to 90.3
55.8 to 65.5
Manganese (Mn), % 0.3 to 0.6
0.5 to 2.5
Molybdenum (Mo), % 0.85 to 1.1
0 to 0.75
Nickel (Ni), % 0 to 0.4
12 to 14
Niobium (Nb), % 0.060 to 0.1
0
Nitrogen (N), % 0.030 to 0.070
0
Phosphorus (P), % 0 to 0.025
0 to 0.040
Silicon (Si), % 0.2 to 0.5
0 to 1.0
Sulfur (S), % 0 to 0.025
0 to 0.030
Titanium (Ti), % 0 to 0.010
0
Vanadium (V), % 0.18 to 0.25
0
Zirconium (Zr), % 0 to 0.010
0