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SAE-AISI 5140 Steel vs. ASTM A202 Steel

Both SAE-AISI 5140 steel and ASTM A202 steel are iron alloys.

For each property being compared, the top bar is SAE-AISI 5140 steel and the bottom bar is ASTM A202 steel.

Metric UnitsUS Customary Units

Mechanical Properties

Brinell Hardness 170 to 290
180 to 200
Elastic (Young's, Tensile) Modulus, GPa 190
190
Elongation at Break, % 12 to 29
17 to 18
Fatigue Strength, MPa 220 to 570
240
Poisson's Ratio 0.29
0.29
Shear Modulus, GPa 73
73
Shear Strength, MPa 360 to 600
360 to 410
Tensile Strength: Ultimate (UTS), MPa 560 to 970
590 to 670
Tensile Strength: Yield (Proof), MPa 290 to 840
350 to 360

Thermal Properties

Latent Heat of Fusion, J/g 250
260
Maximum Temperature: Mechanical, °C 420
410
Melting Completion (Liquidus), °C 1460
1450
Melting Onset (Solidus), °C 1420
1410
Specific Heat Capacity, J/kg-K 470
470
Thermal Conductivity, W/m-K 45
52
Thermal Expansion, µm/m-K 13
13

Electrical Properties

Electrical Conductivity: Equal Volume, % IACS 7.2
7.3
Electrical Conductivity: Equal Weight (Specific), % IACS 8.3
8.4

Otherwise Unclassified Properties

Base Metal Price, % relative 2.1
2.1
Density, g/cm3 7.8
7.8
Embodied Carbon, kg CO2/kg material 1.4
1.4
Embodied Energy, MJ/kg 19
19
Embodied Water, L/kg 49
49

Common Calculations

Resilience: Ultimate (Unit Rupture Work), MJ/m3 76 to 180
93 to 96
Resilience: Unit (Modulus of Resilience), kJ/m3 220 to 1880
330 to 350
Stiffness to Weight: Axial, points 13
13
Stiffness to Weight: Bending, points 24
24
Strength to Weight: Axial, points 20 to 34
21 to 24
Strength to Weight: Bending, points 19 to 28
20 to 22
Thermal Diffusivity, mm2/s 12
14
Thermal Shock Resistance, points 16 to 29
17 to 20