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SAE-AISI 1345 Steel vs. ASTM A356 Grade 8

Both SAE-AISI 1345 steel and ASTM A356 grade 8 are iron alloys. They have a very high 97% 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 1345 steel and the bottom bar is ASTM A356 grade 8.

Metric UnitsUS Customary Units

Mechanical Properties

Brinell Hardness 170 to 210
190
Elastic (Young's, Tensile) Modulus, GPa 190
190
Elongation at Break, % 11 to 23
21
Fatigue Strength, MPa 230 to 390
270
Poisson's Ratio 0.29
0.29
Shear Modulus, GPa 72
73
Tensile Strength: Ultimate (UTS), MPa 590 to 730
630
Tensile Strength: Yield (Proof), MPa 330 to 620
390

Thermal Properties

Latent Heat of Fusion, J/g 250
260
Maximum Temperature: Mechanical, °C 400
440
Melting Completion (Liquidus), °C 1450
1470
Melting Onset (Solidus), °C 1410
1430
Specific Heat Capacity, J/kg-K 470
470
Thermal Conductivity, W/m-K 51
38
Thermal Expansion, µm/m-K 12
13

Electrical Properties

Electrical Conductivity: Equal Volume, % IACS 7.2
7.5
Electrical Conductivity: Equal Weight (Specific), % IACS 8.3
8.6

Otherwise Unclassified Properties

Base Metal Price, % relative 1.9
3.5
Density, g/cm3 7.8
7.8
Embodied Carbon, kg CO2/kg material 1.4
2.0
Embodied Energy, MJ/kg 19
26
Embodied Water, L/kg 48
55

Common Calculations

Resilience: Ultimate (Unit Rupture Work), MJ/m3 78 to 120
110
Resilience: Unit (Modulus of Resilience), kJ/m3 290 to 1040
390
Stiffness to Weight: Axial, points 13
13
Stiffness to Weight: Bending, points 24
24
Strength to Weight: Axial, points 21 to 26
22
Strength to Weight: Bending, points 20 to 23
21
Thermal Diffusivity, mm2/s 14
10
Thermal Shock Resistance, points 19 to 23
18

Alloy Composition

Carbon (C), % 0.43 to 0.48
0 to 0.2
Chromium (Cr), % 0
1.0 to 1.5
Iron (Fe), % 97.2 to 97.8
95.4 to 97.4
Manganese (Mn), % 1.6 to 1.9
0.5 to 0.9
Molybdenum (Mo), % 0
0.9 to 1.2
Phosphorus (P), % 0 to 0.035
0 to 0.035
Silicon (Si), % 0.15 to 0.35
0.2 to 0.6
Sulfur (S), % 0 to 0.040
0 to 0.030
Vanadium (V), % 0
0.050 to 0.15