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ASTM Grade HD Steel vs. SAE-AISI 1340 Steel

Both ASTM grade HD steel and SAE-AISI 1340 steel are iron alloys. They have 65% of their average alloy composition in common. There are 29 material properties with values for both materials. Properties with values for just one material (4, in this case) are not shown.

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

Metric UnitsUS Customary Units

Mechanical Properties

Elastic (Young's, Tensile) Modulus, GPa 200
190
Elongation at Break, % 9.1
11 to 23
Fatigue Strength, MPa 140
220 to 390
Poisson's Ratio 0.27
0.29
Shear Modulus, GPa 80
72
Tensile Strength: Ultimate (UTS), MPa 590
540 to 730
Tensile Strength: Yield (Proof), MPa 270
300 to 620

Thermal Properties

Latent Heat of Fusion, J/g 310
250
Maximum Temperature: Mechanical, °C 1100
400
Melting Completion (Liquidus), °C 1410
1450
Melting Onset (Solidus), °C 1370
1410
Specific Heat Capacity, J/kg-K 490
470
Thermal Conductivity, W/m-K 16
51
Thermal Expansion, µm/m-K 11
12

Electrical Properties

Electrical Conductivity: Equal Volume, % IACS 2.1
7.2
Electrical Conductivity: Equal Weight (Specific), % IACS 2.5
8.3

Otherwise Unclassified Properties

Base Metal Price, % relative 17
1.9
Density, g/cm3 7.7
7.8
Embodied Carbon, kg CO2/kg material 3.1
1.4
Embodied Energy, MJ/kg 45
19
Embodied Water, L/kg 180
48

Common Calculations

Resilience: Ultimate (Unit Rupture Work), MJ/m3 44
78 to 110
Resilience: Unit (Modulus of Resilience), kJ/m3 180
240 to 1040
Stiffness to Weight: Axial, points 15
13
Stiffness to Weight: Bending, points 26
24
Strength to Weight: Axial, points 21
19 to 26
Strength to Weight: Bending, points 20
19 to 23
Thermal Diffusivity, mm2/s 4.3
14
Thermal Shock Resistance, points 19
17 to 23

Alloy Composition

Carbon (C), % 0 to 0.5
0.38 to 0.43
Chromium (Cr), % 26 to 30
0
Iron (Fe), % 58.4 to 70
97.2 to 97.9
Manganese (Mn), % 0 to 1.5
1.6 to 1.9
Molybdenum (Mo), % 0 to 0.5
0
Nickel (Ni), % 4.0 to 7.0
0
Phosphorus (P), % 0 to 0.040
0 to 0.035
Silicon (Si), % 0 to 2.0
0.15 to 0.35
Sulfur (S), % 0 to 0.040
0 to 0.040