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SAE-AISI 1345 Steel vs. ASTM A302 Alloy Steel

Both SAE-AISI 1345 steel and ASTM A302 alloy steel are iron alloys.

For each property being compared, the top bar is SAE-AISI 1345 steel and the bottom bar is ASTM A302 alloy steel.

Metric UnitsUS Customary Units

Mechanical Properties

Brinell Hardness 170 to 210
180 to 190
Elastic (Young's, Tensile) Modulus, GPa 190
190
Elongation at Break, % 11 to 23
20 to 23
Fatigue Strength, MPa 230 to 390
250 to 280
Poisson's Ratio 0.29
0.29
Shear Modulus, GPa 72
73
Shear Strength, MPa 370 to 440
370 to 390
Tensile Strength: Ultimate (UTS), MPa 590 to 730
590 to 620
Tensile Strength: Yield (Proof), MPa 330 to 620
350 to 390

Thermal Properties

Latent Heat of Fusion, J/g 250
250
Maximum Temperature: Mechanical, °C 400
410
Melting Completion (Liquidus), °C 1450
1460
Melting Onset (Solidus), °C 1410
1420
Specific Heat Capacity, J/kg-K 470
470
Thermal Conductivity, W/m-K 51
39 to 51
Thermal Expansion, µm/m-K 12
13

Electrical Properties

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

Otherwise Unclassified Properties

Base Metal Price, % relative 1.9
2.4 to 3.0
Density, g/cm3 7.8
7.8 to 7.9
Embodied Carbon, kg CO2/kg material 1.4
1.5 to 1.6
Embodied Energy, MJ/kg 19
20 to 21
Embodied Water, L/kg 48
48 to 50

Common Calculations

Resilience: Ultimate (Unit Rupture Work), MJ/m3 78 to 120
110 to 120
Resilience: Unit (Modulus of Resilience), kJ/m3 290 to 1040
330 to 410
Stiffness to Weight: Axial, points 13
13
Stiffness to Weight: Bending, points 24
24
Strength to Weight: Axial, points 21 to 26
21 to 22
Strength to Weight: Bending, points 20 to 23
20 to 21
Thermal Diffusivity, mm2/s 14
10 to 14
Thermal Shock Resistance, points 19 to 23
17 to 18