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SAE-AISI 5140 Steel vs. ASTM A356 Grade 6

Both SAE-AISI 5140 steel and ASTM A356 grade 6 are iron alloys. They have a very high 99% of their average alloy composition in common. There are 30 material properties with values for both materials. Properties with values for just one material (3, in this case) are not shown.

For each property being compared, the top bar is SAE-AISI 5140 steel and the bottom bar is ASTM A356 grade 6.

Metric UnitsUS Customary Units

Mechanical Properties

Brinell Hardness 170 to 290
170
Elastic (Young's, Tensile) Modulus, GPa 190
190
Elongation at Break, % 12 to 29
25
Fatigue Strength, MPa 220 to 570
250
Poisson's Ratio 0.29
0.29
Shear Modulus, GPa 73
73
Tensile Strength: Ultimate (UTS), MPa 560 to 970
550
Tensile Strength: Yield (Proof), MPa 290 to 840
350

Thermal Properties

Latent Heat of Fusion, J/g 250
250
Maximum Temperature: Mechanical, °C 420
430
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 45
41
Thermal Expansion, µm/m-K 13
13

Electrical Properties

Electrical Conductivity: Equal Volume, % IACS 7.2
7.4
Electrical Conductivity: Equal Weight (Specific), % IACS 8.3
8.4

Otherwise Unclassified Properties

Base Metal Price, % relative 2.1
2.9
Density, g/cm3 7.8
7.8
Embodied Carbon, kg CO2/kg material 1.4
1.6
Embodied Energy, MJ/kg 19
21
Embodied Water, L/kg 49
53

Common Calculations

Resilience: Ultimate (Unit Rupture Work), MJ/m3 76 to 180
120
Resilience: Unit (Modulus of Resilience), kJ/m3 220 to 1880
320
Stiffness to Weight: Axial, points 13
13
Stiffness to Weight: Bending, points 24
24
Strength to Weight: Axial, points 20 to 34
20
Strength to Weight: Bending, points 19 to 28
19
Thermal Diffusivity, mm2/s 12
11
Thermal Shock Resistance, points 16 to 29
16

Alloy Composition

Carbon (C), % 0.38 to 0.43
0 to 0.2
Chromium (Cr), % 0.7 to 0.9
1.0 to 1.5
Iron (Fe), % 97.3 to 98.1
96.2 to 98.1
Manganese (Mn), % 0.7 to 0.9
0.5 to 0.8
Molybdenum (Mo), % 0
0.45 to 0.65
Phosphorus (P), % 0 to 0.035
0 to 0.035
Silicon (Si), % 0.15 to 0.35
0 to 0.6
Sulfur (S), % 0 to 0.040
0 to 0.030