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ASTM A285 Carbon Steel vs. SAE-AISI 4042 Steel

Both ASTM A285 carbon steel and SAE-AISI 4042 steel are iron alloys.

For each property being compared, the top bar is ASTM A285 carbon steel and the bottom bar is SAE-AISI 4042 steel.

Metric UnitsUS Customary Units

Mechanical Properties

Brinell Hardness 110 to 130
200
Elastic (Young's, Tensile) Modulus, GPa 190
190
Elongation at Break, % 30 to 34
13
Fatigue Strength, MPa 150 to 180
360
Poisson's Ratio 0.29
0.29
Shear Modulus, GPa 73
73
Shear Strength, MPa 250 to 290
410
Tensile Strength: Ultimate (UTS), MPa 380 to 450
680
Tensile Strength: Yield (Proof), MPa 190 to 230
570

Thermal Properties

Latent Heat of Fusion, J/g 250
250
Maximum Temperature: Mechanical, °C 400
400
Melting Completion (Liquidus), °C 1470
1460
Melting Onset (Solidus), °C 1420 to 1430
1420
Specific Heat Capacity, J/kg-K 470
470
Thermal Conductivity, W/m-K 53
49
Thermal Expansion, µm/m-K 12
12

Electrical Properties

Electrical Conductivity: Equal Volume, % IACS 7.0
7.1
Electrical Conductivity: Equal Weight (Specific), % IACS 8.0
8.2

Otherwise Unclassified Properties

Base Metal Price, % relative 1.8
2.1
Density, g/cm3 7.9
7.8
Embodied Carbon, kg CO2/kg material 1.4
1.5
Embodied Energy, MJ/kg 18
19
Embodied Water, L/kg 46
47

Common Calculations

Resilience: Ultimate (Unit Rupture Work), MJ/m3 110
81
Resilience: Unit (Modulus of Resilience), kJ/m3 94 to 150
860
Stiffness to Weight: Axial, points 13
13
Stiffness to Weight: Bending, points 24
24
Strength to Weight: Axial, points 13 to 16
24
Strength to Weight: Bending, points 15 to 17
22
Thermal Diffusivity, mm2/s 14
13
Thermal Shock Resistance, points 12 to 14
22