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SAE-AISI 1018 Steel vs. ASTM A182 Grade FR

Both SAE-AISI 1018 steel and ASTM A182 grade FR are iron alloys. They have a very high 97% of their average alloy composition in common.

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

Metric UnitsUS Customary Units

Mechanical Properties

Brinell Hardness 130 to 140
170
Elastic (Young's, Tensile) Modulus, GPa 190
190
Elongation at Break, % 17 to 27
28
Fatigue Strength, MPa 180 to 270
270
Poisson's Ratio 0.29
0.29
Reduction in Area, % 45 to 57
43
Shear Modulus, GPa 73
72
Shear Strength, MPa 280 to 300
320
Tensile Strength: Ultimate (UTS), MPa 430 to 480
490
Tensile Strength: Yield (Proof), MPa 240 to 400
360

Thermal Properties

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

Electrical Properties

Electrical Conductivity: Equal Volume, % IACS 7.0
7.5
Electrical Conductivity: Equal Weight (Specific), % IACS 8.0
8.6

Otherwise Unclassified Properties

Base Metal Price, % relative 1.8
3.3
Density, g/cm3 7.9
7.9
Embodied Carbon, kg CO2/kg material 1.4
1.6
Embodied Energy, MJ/kg 18
21
Embodied Water, L/kg 46
52

Common Calculations

Resilience: Ultimate (Unit Rupture Work), MJ/m3 75 to 100
120
Resilience: Unit (Modulus of Resilience), kJ/m3 150 to 430
340
Stiffness to Weight: Axial, points 13
13
Stiffness to Weight: Bending, points 24
24
Strength to Weight: Axial, points 15 to 17
17
Strength to Weight: Bending, points 16 to 17
17
Thermal Diffusivity, mm2/s 14
14
Thermal Shock Resistance, points 14 to 15
14

Alloy Composition

Carbon (C), % 0.15 to 0.2
0 to 0.2
Copper (Cu), % 0
0.75 to 1.3
Iron (Fe), % 98.8 to 99.25
95.2 to 97.3
Manganese (Mn), % 0.6 to 0.9
0.4 to 1.1
Nickel (Ni), % 0
1.6 to 2.2
Phosphorus (P), % 0 to 0.040
0 to 0.045
Sulfur (S), % 0 to 0.050
0 to 0.050