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ASTM A369 Grade FP91 vs. AWS E209

Both ASTM A369 grade FP91 and AWS E209 are iron alloys. They have 69% of their average alloy composition in common. There are 21 material properties with values for both materials. Properties with values for just one material (11, 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 E209.

Metric UnitsUS Customary Units

Mechanical Properties

Elastic (Young's, Tensile) Modulus, GPa 190
200
Elongation at Break, % 19
17
Poisson's Ratio 0.28
0.28
Shear Modulus, GPa 75
79
Tensile Strength: Ultimate (UTS), MPa 670
770

Thermal Properties

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

Otherwise Unclassified Properties

Base Metal Price, % relative 7.0
21
Density, g/cm3 7.8
7.8
Embodied Carbon, kg CO2/kg material 2.6
4.4
Embodied Energy, MJ/kg 37
63
Embodied Water, L/kg 88
180

Common Calculations

PREN (Pitting Resistance) 13
33
Stiffness to Weight: Axial, points 14
14
Stiffness to Weight: Bending, points 25
25
Strength to Weight: Axial, points 24
28
Strength to Weight: Bending, points 22
24
Thermal Shock Resistance, points 18
19

Alloy Composition

Aluminum (Al), % 0 to 0.020
0
Carbon (C), % 0.080 to 0.12
0 to 0.060
Chromium (Cr), % 8.0 to 9.5
20.5 to 24
Copper (Cu), % 0
0 to 0.75
Iron (Fe), % 87.3 to 90.3
51.5 to 64.3
Manganese (Mn), % 0.3 to 0.6
4.0 to 7.0
Molybdenum (Mo), % 0.85 to 1.1
1.5 to 3.0
Nickel (Ni), % 0 to 0.4
9.5 to 12
Niobium (Nb), % 0.060 to 0.1
0
Nitrogen (N), % 0.030 to 0.070
0.1 to 0.3
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
0.1 to 0.3
Zirconium (Zr), % 0 to 0.010
0