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ASTM A588 Steel vs. SAE-AISI 5120 Steel

Both ASTM A588 steel and SAE-AISI 5120 steel are iron alloys.

For each property being compared, the top bar is ASTM A588 steel and the bottom bar is SAE-AISI 5120 steel.

Metric UnitsUS Customary Units

Mechanical Properties

Brinell Hardness 170
150
Elastic (Young's, Tensile) Modulus, GPa 190
190
Elongation at Break, % 22
16
Fatigue Strength, MPa 270
210
Poisson's Ratio 0.29
0.29
Shear Modulus, GPa 73
73
Shear Strength, MPa 350
310
Tensile Strength: Ultimate (UTS), MPa 550
500
Tensile Strength: Yield (Proof), MPa 390
320

Thermal Properties

Latent Heat of Fusion, J/g 250 to 260
250
Maximum Temperature: Mechanical, °C 410
420
Melting Completion (Liquidus), °C 1460
1460
Melting Onset (Solidus), °C 1410 to 1420
1420
Specific Heat Capacity, J/kg-K 470
470
Thermal Conductivity, W/m-K 43 to 44
47
Thermal Expansion, µm/m-K 13
12

Electrical Properties

Electrical Conductivity: Equal Volume, % IACS 7.4
7.2
Electrical Conductivity: Equal Weight (Specific), % IACS 8.5
8.2

Otherwise Unclassified Properties

Base Metal Price, % relative 2.3 to 2.5
2.1
Density, g/cm3 7.8
7.8
Embodied Carbon, kg CO2/kg material 1.5 to 1.6
1.4
Embodied Energy, MJ/kg 20 to 22
19
Embodied Water, L/kg 50 to 51
49

Common Calculations

Resilience: Ultimate (Unit Rupture Work), MJ/m3 110
71
Resilience: Unit (Modulus of Resilience), kJ/m3 400
280
Stiffness to Weight: Axial, points 13
13
Stiffness to Weight: Bending, points 24
24
Strength to Weight: Axial, points 20
18
Strength to Weight: Bending, points 19
18
Thermal Diffusivity, mm2/s 12
13
Thermal Shock Resistance, points 16
16