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SAE-AISI A4 Steel vs. ASTM A182 Grade F5a

Both SAE-AISI A4 steel and ASTM A182 grade F5a are iron alloys. They have a very high 96% of their average alloy composition in common. There are 24 material properties with values for both materials. Properties with values for just one material (9, in this case) are not shown.

For each property being compared, the top bar is SAE-AISI A4 steel and the bottom bar is ASTM A182 grade F5a.

Metric UnitsUS Customary Units

Mechanical Properties

Elastic (Young's, Tensile) Modulus, GPa 190
190
Poisson's Ratio 0.29
0.29
Shear Modulus, GPa 73
74
Tensile Strength: Ultimate (UTS), MPa 710 to 2050
710

Thermal Properties

Latent Heat of Fusion, J/g 250
260
Melting Completion (Liquidus), °C 1450
1460
Melting Onset (Solidus), °C 1410
1420
Specific Heat Capacity, J/kg-K 470
470
Thermal Conductivity, W/m-K 40
40
Thermal Expansion, µm/m-K 12
13

Electrical Properties

Electrical Conductivity: Equal Volume, % IACS 7.4
8.2
Electrical Conductivity: Equal Weight (Specific), % IACS 8.6
9.4

Otherwise Unclassified Properties

Base Metal Price, % relative 3.9
4.5
Density, g/cm3 7.8
7.8
Embodied Carbon, kg CO2/kg material 1.8
1.8
Embodied Energy, MJ/kg 24
24
Embodied Water, L/kg 59
69

Common Calculations

PREN (Pitting Resistance) 5.3
6.8
Stiffness to Weight: Axial, points 13
14
Stiffness to Weight: Bending, points 24
25
Strength to Weight: Axial, points 25 to 73
25
Strength to Weight: Bending, points 23 to 46
23
Thermal Diffusivity, mm2/s 11
11
Thermal Shock Resistance, points 23 to 67
20

Alloy Composition

Carbon (C), % 1.0 to 1.1
0 to 0.25
Chromium (Cr), % 0.9 to 2.2
4.0 to 6.0
Copper (Cu), % 0 to 0.25
0
Iron (Fe), % 92 to 95.5
91.4 to 95.6
Manganese (Mn), % 1.8 to 2.2
0 to 0.6
Molybdenum (Mo), % 0.9 to 1.4
0.44 to 0.65
Nickel (Ni), % 0 to 0.3
0 to 0.5
Phosphorus (P), % 0 to 0.030
0 to 0.040
Silicon (Si), % 0 to 0.5
0 to 0.5
Sulfur (S), % 0 to 0.030
0 to 0.030