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SAE-AISI 4027 Steel vs. ASTM A299 Steel

Both SAE-AISI 4027 steel and ASTM A299 steel are iron alloys.

For each property being compared, the top bar is SAE-AISI 4027 steel and the bottom bar is ASTM A299 steel.

Metric UnitsUS Customary Units

Mechanical Properties

Brinell Hardness 150
180 to 190
Elastic (Young's, Tensile) Modulus, GPa 190
190
Elongation at Break, % 23
21 to 22
Fatigue Strength, MPa 190
230 to 250
Poisson's Ratio 0.29
0.29
Shear Modulus, GPa 73
73
Shear Strength, MPa 320
370 to 390
Tensile Strength: Ultimate (UTS), MPa 500
590 to 620
Tensile Strength: Yield (Proof), MPa 260
330 to 360

Thermal Properties

Latent Heat of Fusion, J/g 250
250
Maximum Temperature: Mechanical, °C 400
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 49
51
Thermal Expansion, µm/m-K 12
13

Electrical Properties

Electrical Conductivity: Equal Volume, % IACS 7.1
7.2
Electrical Conductivity: Equal Weight (Specific), % IACS 8.1
8.2

Otherwise Unclassified Properties

Base Metal Price, % relative 2.1
1.9
Density, g/cm3 7.8
7.8
Embodied Carbon, kg CO2/kg material 1.5
1.4
Embodied Energy, MJ/kg 19
19
Embodied Water, L/kg 47
47

Common Calculations

Resilience: Ultimate (Unit Rupture Work), MJ/m3 97
110
Resilience: Unit (Modulus of Resilience), kJ/m3 190
290 to 350
Stiffness to Weight: Axial, points 13
13
Stiffness to Weight: Bending, points 24
24
Strength to Weight: Axial, points 18
21 to 22
Strength to Weight: Bending, points 18
20 to 21
Thermal Diffusivity, mm2/s 13
14
Thermal Shock Resistance, points 16
17 to 18