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ASTM A369 Grade FPA vs. ASTM A285 Carbon Steel

Both ASTM A369 grade FPA and ASTM A285 carbon steel are iron alloys.

For each property being compared, the top bar is ASTM A369 grade FPA and the bottom bar is ASTM A285 carbon steel.

Metric UnitsUS Customary Units

Mechanical Properties

Brinell Hardness 110
110 to 130
Elastic (Young's, Tensile) Modulus, GPa 190
190
Elongation at Break, % 27
30 to 34
Fatigue Strength, MPa 180
150 to 180
Poisson's Ratio 0.29
0.29
Shear Modulus, GPa 73
73
Shear Strength, MPa 240
250 to 290
Tensile Strength: Ultimate (UTS), MPa 380
380 to 450
Tensile Strength: Yield (Proof), MPa 240
190 to 230

Thermal Properties

Latent Heat of Fusion, J/g 250
250
Maximum Temperature: Mechanical, °C 400
400
Melting Completion (Liquidus), °C 1460
1470
Melting Onset (Solidus), °C 1420
1420 to 1430
Specific Heat Capacity, J/kg-K 470
470
Thermal Conductivity, W/m-K 52
53
Thermal Expansion, µm/m-K 12
12

Electrical Properties

Electrical Conductivity: Equal Volume, % IACS 7.1
7.0
Electrical Conductivity: Equal Weight (Specific), % IACS 8.1
8.0

Otherwise Unclassified Properties

Base Metal Price, % relative 1.8
1.8
Density, g/cm3 7.8
7.9
Embodied Carbon, kg CO2/kg material 1.4
1.4
Embodied Energy, MJ/kg 18
18
Embodied Water, L/kg 46
46

Common Calculations

Resilience: Ultimate (Unit Rupture Work), MJ/m3 89
110
Resilience: Unit (Modulus of Resilience), kJ/m3 150
94 to 150
Stiffness to Weight: Axial, points 13
13
Stiffness to Weight: Bending, points 24
24
Strength to Weight: Axial, points 13
13 to 16
Strength to Weight: Bending, points 15
15 to 17
Thermal Diffusivity, mm2/s 14
14
Thermal Shock Resistance, points 12
12 to 14