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ASTM A182 Grade FR vs. SAE-AISI 1078 Steel

Both ASTM A182 grade FR and SAE-AISI 1078 steel 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 ASTM A182 grade FR and the bottom bar is SAE-AISI 1078 steel.

Metric UnitsUS Customary Units

Mechanical Properties

Brinell Hardness 170
220 to 230
Elastic (Young's, Tensile) Modulus, GPa 190
190
Elongation at Break, % 28
11 to 14
Fatigue Strength, MPa 270
270 to 350
Poisson's Ratio 0.29
0.29
Reduction in Area, % 43
34 to 45
Shear Modulus, GPa 72
72
Shear Strength, MPa 320
440 to 470
Tensile Strength: Ultimate (UTS), MPa 490
730 to 780
Tensile Strength: Yield (Proof), MPa 360
430 to 570

Thermal Properties

Latent Heat of Fusion, J/g 250
250
Maximum Temperature: Mechanical, °C 410
400
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
49
Thermal Expansion, µm/m-K 13
11

Electrical Properties

Electrical Conductivity: Equal Volume, % IACS 7.5
7.0
Electrical Conductivity: Equal Weight (Specific), % IACS 8.6
8.1

Otherwise Unclassified Properties

Base Metal Price, % relative 3.3
1.8
Density, g/cm3 7.9
7.8
Embodied Carbon, kg CO2/kg material 1.6
1.4
Embodied Energy, MJ/kg 21
18
Embodied Water, L/kg 52
45

Common Calculations

Resilience: Ultimate (Unit Rupture Work), MJ/m3 120
77 to 90
Resilience: Unit (Modulus of Resilience), kJ/m3 340
490 to 860
Stiffness to Weight: Axial, points 13
13
Stiffness to Weight: Bending, points 24
24
Strength to Weight: Axial, points 17
26 to 28
Strength to Weight: Bending, points 17
23 to 24
Thermal Diffusivity, mm2/s 14
13
Thermal Shock Resistance, points 14
25 to 26

Alloy Composition

Carbon (C), % 0 to 0.2
0.72 to 0.85
Copper (Cu), % 0.75 to 1.3
0
Iron (Fe), % 95.2 to 97.3
98.5 to 99
Manganese (Mn), % 0.4 to 1.1
0.3 to 0.6
Nickel (Ni), % 1.6 to 2.2
0
Phosphorus (P), % 0 to 0.045
0 to 0.040
Sulfur (S), % 0 to 0.050
0 to 0.050