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ASTM A369 Grade FP1 vs. SAE-AISI 1021 Steel

Both ASTM A369 grade FP1 and SAE-AISI 1021 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 FP1 and the bottom bar is SAE-AISI 1021 steel.

Metric UnitsUS Customary Units

Mechanical Properties

Brinell Hardness 130
130 to 150
Elastic (Young's, Tensile) Modulus, GPa 190
190
Elongation at Break, % 20
17 to 27
Fatigue Strength, MPa 160
190 to 300
Poisson's Ratio 0.29
0.29
Shear Modulus, GPa 73
73
Shear Strength, MPa 270
310 to 320
Tensile Strength: Ultimate (UTS), MPa 430
480 to 530
Tensile Strength: Yield (Proof), MPa 240
260 to 450

Thermal Properties

Latent Heat of Fusion, J/g 250
250
Maximum Temperature: Mechanical, °C 410
400
Melting Completion (Liquidus), °C 1470
1460
Melting Onset (Solidus), °C 1420
1420
Specific Heat Capacity, J/kg-K 470
470
Thermal Conductivity, W/m-K 50
52
Thermal Expansion, µm/m-K 13
12

Electrical Properties

Electrical Conductivity: Equal Volume, % IACS 7.1
7.0
Electrical Conductivity: Equal Weight (Specific), % IACS 8.2
8.0

Otherwise Unclassified Properties

Base Metal Price, % relative 2.4
1.8
Density, g/cm3 7.9
7.9
Embodied Carbon, kg CO2/kg material 1.5
1.4
Embodied Energy, MJ/kg 20
18
Embodied Water, L/kg 47
46

Common Calculations

Resilience: Ultimate (Unit Rupture Work), MJ/m3 75
84 to 110
Resilience: Unit (Modulus of Resilience), kJ/m3 150
180 to 530
Stiffness to Weight: Axial, points 13
13
Stiffness to Weight: Bending, points 24
24
Strength to Weight: Axial, points 15
17 to 19
Strength to Weight: Bending, points 16
17 to 18
Thermal Diffusivity, mm2/s 13
14
Thermal Shock Resistance, points 13
15 to 17

Alloy Composition

Carbon (C), % 0.1 to 0.2
0.18 to 0.23
Iron (Fe), % 97.8 to 99.06
98.8 to 99.22
Manganese (Mn), % 0.3 to 0.8
0.6 to 0.9
Molybdenum (Mo), % 0.44 to 0.65
0
Phosphorus (P), % 0 to 0.025
0 to 0.040
Silicon (Si), % 0.1 to 0.5
0
Sulfur (S), % 0 to 0.025
0 to 0.050