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SAE-AISI 1345 Steel vs. ASTM Grade HT Steel

Both SAE-AISI 1345 steel and ASTM grade HT steel are iron alloys. They have 47% 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 grade HT steel.

Metric UnitsUS Customary Units

Mechanical Properties

Brinell Hardness 170 to 210
150
Elastic (Young's, Tensile) Modulus, GPa 190
190
Elongation at Break, % 11 to 23
4.6
Fatigue Strength, MPa 230 to 390
130
Poisson's Ratio 0.29
0.28
Shear Modulus, GPa 72
76
Tensile Strength: Ultimate (UTS), MPa 590 to 730
500
Tensile Strength: Yield (Proof), MPa 330 to 620
270

Thermal Properties

Latent Heat of Fusion, J/g 250
310
Maximum Temperature: Mechanical, °C 400
1010
Melting Completion (Liquidus), °C 1450
1390
Melting Onset (Solidus), °C 1410
1340
Specific Heat Capacity, J/kg-K 470
480
Thermal Conductivity, W/m-K 51
12
Thermal Expansion, µm/m-K 12
15

Electrical Properties

Electrical Conductivity: Equal Volume, % IACS 7.2
1.7
Electrical Conductivity: Equal Weight (Specific), % IACS 8.3
1.9

Otherwise Unclassified Properties

Base Metal Price, % relative 1.9
31
Density, g/cm3 7.8
8.0
Embodied Carbon, kg CO2/kg material 1.4
5.4
Embodied Energy, MJ/kg 19
76
Embodied Water, L/kg 48
190

Common Calculations

Resilience: Ultimate (Unit Rupture Work), MJ/m3 78 to 120
19
Resilience: Unit (Modulus of Resilience), kJ/m3 290 to 1040
180
Stiffness to Weight: Axial, points 13
13
Stiffness to Weight: Bending, points 24
24
Strength to Weight: Axial, points 21 to 26
18
Strength to Weight: Bending, points 20 to 23
18
Thermal Diffusivity, mm2/s 14
3.2
Thermal Shock Resistance, points 19 to 23
12

Alloy Composition

Carbon (C), % 0.43 to 0.48
0.35 to 0.75
Chromium (Cr), % 0
15 to 19
Iron (Fe), % 97.2 to 97.8
38.2 to 51.7
Manganese (Mn), % 1.6 to 1.9
0 to 2.0
Molybdenum (Mo), % 0
0 to 0.5
Nickel (Ni), % 0
33 to 37
Phosphorus (P), % 0 to 0.035
0 to 0.040
Silicon (Si), % 0.15 to 0.35
0 to 2.5
Sulfur (S), % 0 to 0.040
0 to 0.040