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ASTM A369 Grade FPA vs. SAE-AISI 1090 Steel

Both ASTM A369 grade FPA and SAE-AISI 1090 steel are iron alloys. Their average alloy composition is basically identical. There are 31 material properties with values for both materials. Properties with values for just one material (1, in this case) are not shown.

For each property being compared, the top bar is ASTM A369 grade FPA and the bottom bar is SAE-AISI 1090 steel.

Metric UnitsUS Customary Units

Mechanical Properties

Brinell Hardness 110
220 to 280
Elastic (Young's, Tensile) Modulus, GPa 190
190
Elongation at Break, % 27
11
Fatigue Strength, MPa 180
320 to 380
Poisson's Ratio 0.29
0.29
Shear Modulus, GPa 73
72
Shear Strength, MPa 240
470 to 570
Tensile Strength: Ultimate (UTS), MPa 380
790 to 950
Tensile Strength: Yield (Proof), MPa 240
520 to 610

Thermal Properties

Latent Heat of Fusion, J/g 250
240
Maximum Temperature: Mechanical, °C 400
400
Melting Completion (Liquidus), °C 1460
1450
Melting Onset (Solidus), °C 1420
1410
Specific Heat Capacity, J/kg-K 470
470
Thermal Conductivity, W/m-K 52
50
Thermal Expansion, µm/m-K 12
12

Electrical Properties

Electrical Conductivity: Equal Volume, % IACS 7.1
7.1
Electrical Conductivity: Equal Weight (Specific), % IACS 8.1
8.2

Otherwise Unclassified Properties

Base Metal Price, % relative 1.8
1.8
Density, g/cm3 7.8
7.8
Embodied Carbon, kg CO2/kg material 1.4
1.4
Embodied Energy, MJ/kg 18
19
Embodied Water, L/kg 46
46

Common Calculations

Resilience: Ultimate (Unit Rupture Work), MJ/m3 89
82 to 91
Resilience: Unit (Modulus of Resilience), kJ/m3 150
730 to 1000
Stiffness to Weight: Axial, points 13
13
Stiffness to Weight: Bending, points 24
24
Strength to Weight: Axial, points 13
28 to 34
Strength to Weight: Bending, points 15
24 to 27
Thermal Diffusivity, mm2/s 14
13
Thermal Shock Resistance, points 12
25 to 31

Alloy Composition

Carbon (C), % 0 to 0.25
0.85 to 1.0
Iron (Fe), % 98.3 to 99.63
98 to 98.6
Manganese (Mn), % 0.27 to 0.93
0.6 to 0.9
Phosphorus (P), % 0 to 0.035
0 to 0.040
Silicon (Si), % 0.1 to 0.5
0
Sulfur (S), % 0 to 0.035
0 to 0.050