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ASTM A182 Grade F1 vs. SAE-AISI 1018 Steel

Both ASTM A182 grade F1 and SAE-AISI 1018 steel are iron alloys. Their average alloy composition is basically identical.

For each property being compared, the top bar is ASTM A182 grade F1 and the bottom bar is SAE-AISI 1018 steel.

Metric UnitsUS Customary Units

Mechanical Properties

Brinell Hardness 170
130 to 140
Elastic (Young's, Tensile) Modulus, GPa 190
190
Elongation at Break, % 22
17 to 27
Fatigue Strength, MPa 220
180 to 270
Poisson's Ratio 0.29
0.29
Reduction in Area, % 34
45 to 57
Shear Modulus, GPa 73
73
Shear Strength, MPa 340
280 to 300
Tensile Strength: Ultimate (UTS), MPa 540
430 to 480
Tensile Strength: Yield (Proof), MPa 310
240 to 400

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 48
46

Common Calculations

Resilience: Ultimate (Unit Rupture Work), MJ/m3 100
75 to 100
Resilience: Unit (Modulus of Resilience), kJ/m3 260
150 to 430
Stiffness to Weight: Axial, points 13
13
Stiffness to Weight: Bending, points 24
24
Strength to Weight: Axial, points 19
15 to 17
Strength to Weight: Bending, points 19
16 to 17
Thermal Diffusivity, mm2/s 13
14
Thermal Shock Resistance, points 16
14 to 15

Alloy Composition

Carbon (C), % 0 to 0.28
0.15 to 0.2
Iron (Fe), % 97.7 to 98.8
98.8 to 99.25
Manganese (Mn), % 0.6 to 0.9
0.6 to 0.9
Molybdenum (Mo), % 0.44 to 0.65
0
Phosphorus (P), % 0 to 0.045
0 to 0.040
Silicon (Si), % 0.15 to 0.35
0
Sulfur (S), % 0 to 0.045
0 to 0.050