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ASTM A369 Grade FP9 vs. AWS E33-31

Both ASTM A369 grade FP9 and AWS E33-31 are iron alloys. They have 41% 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 FP9 and the bottom bar is AWS E33-31.

Metric UnitsUS Customary Units

Mechanical Properties

Elastic (Young's, Tensile) Modulus, GPa 190
210
Elongation at Break, % 20
29
Poisson's Ratio 0.28
0.27
Shear Modulus, GPa 75
81
Tensile Strength: Ultimate (UTS), MPa 470
810

Thermal Properties

Latent Heat of Fusion, J/g 270
320
Melting Completion (Liquidus), °C 1450
1380
Melting Onset (Solidus), °C 1410
1330
Specific Heat Capacity, J/kg-K 480
480
Thermal Expansion, µm/m-K 13
14

Otherwise Unclassified Properties

Base Metal Price, % relative 6.5
36
Density, g/cm3 7.8
7.9
Embodied Carbon, kg CO2/kg material 2.0
6.0
Embodied Energy, MJ/kg 28
86
Embodied Water, L/kg 87
260

Common Calculations

PREN (Pitting Resistance) 12
44
Stiffness to Weight: Axial, points 14
14
Stiffness to Weight: Bending, points 25
25
Strength to Weight: Axial, points 17
28
Strength to Weight: Bending, points 17
24
Thermal Shock Resistance, points 13
19

Alloy Composition

Carbon (C), % 0 to 0.15
0 to 0.030
Chromium (Cr), % 8.0 to 10
31 to 35
Copper (Cu), % 0
0.4 to 0.8
Iron (Fe), % 87.1 to 90.3
24.7 to 34.8
Manganese (Mn), % 0.3 to 0.6
2.5 to 4.0
Molybdenum (Mo), % 0.9 to 1.1
1.0 to 2.0
Nickel (Ni), % 0
30 to 32
Nitrogen (N), % 0
0.3 to 0.5
Phosphorus (P), % 0 to 0.030
0 to 0.020
Silicon (Si), % 0.5 to 1.0
0 to 0.9
Sulfur (S), % 0 to 0.030
0 to 0.010