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SAE-AISI 1340 Steel vs. ASTM A204 Steel

Both SAE-AISI 1340 steel and ASTM A204 steel are iron alloys.

For each property being compared, the top bar is SAE-AISI 1340 steel and the bottom bar is ASTM A204 steel.

Metric UnitsUS Customary Units

Mechanical Properties

Brinell Hardness 160 to 210
160 to 180
Elastic (Young's, Tensile) Modulus, GPa 190
190
Elongation at Break, % 11 to 23
18 to 22
Fatigue Strength, MPa 220 to 390
200 to 220
Poisson's Ratio 0.29
0.29
Shear Modulus, GPa 72
73
Shear Strength, MPa 340 to 440
330 to 360
Tensile Strength: Ultimate (UTS), MPa 540 to 730
520 to 590
Tensile Strength: Yield (Proof), MPa 300 to 620
290 to 330

Thermal Properties

Latent Heat of Fusion, J/g 250
250
Maximum Temperature: Mechanical, °C 400
410
Melting Completion (Liquidus), °C 1450
1470
Melting Onset (Solidus), °C 1410
1420 to 1430
Specific Heat Capacity, J/kg-K 470
470
Thermal Conductivity, W/m-K 51
52
Thermal Expansion, µm/m-K 12
13

Electrical Properties

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

Otherwise Unclassified Properties

Base Metal Price, % relative 1.9
2.4
Density, g/cm3 7.8
7.9
Embodied Carbon, kg CO2/kg material 1.4
1.5
Embodied Energy, MJ/kg 19
20
Embodied Water, L/kg 48
47

Common Calculations

Resilience: Ultimate (Unit Rupture Work), MJ/m3 78 to 110
90 to 95
Resilience: Unit (Modulus of Resilience), kJ/m3 240 to 1040
220 to 290
Stiffness to Weight: Axial, points 13
13
Stiffness to Weight: Bending, points 24
24
Strength to Weight: Axial, points 19 to 26
18 to 21
Strength to Weight: Bending, points 19 to 23
18 to 20
Thermal Diffusivity, mm2/s 14
14
Thermal Shock Resistance, points 17 to 23
15 to 17