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ASTM Grade HL Steel vs. SAE-AISI 8645 Steel

Both ASTM grade HL steel and SAE-AISI 8645 steel are iron alloys. They have 50% of their average alloy composition in common. There are 26 material properties with values for both materials. Properties with values for just one material (7, in this case) are not shown.

For each property being compared, the top bar is ASTM grade HL steel and the bottom bar is SAE-AISI 8645 steel.

Metric UnitsUS Customary Units

Mechanical Properties

Brinell Hardness 150
180 to 200
Elastic (Young's, Tensile) Modulus, GPa 200
190
Elongation at Break, % 11
12 to 23
Fatigue Strength, MPa 150
280 to 350
Poisson's Ratio 0.27
0.29
Shear Modulus, GPa 80
73
Tensile Strength: Ultimate (UTS), MPa 500
600 to 670
Tensile Strength: Yield (Proof), MPa 270
390 to 560

Thermal Properties

Latent Heat of Fusion, J/g 320
250
Maximum Temperature: Mechanical, °C 1100
410
Melting Completion (Liquidus), °C 1390
1460
Melting Onset (Solidus), °C 1340
1420
Specific Heat Capacity, J/kg-K 490
470
Thermal Expansion, µm/m-K 17
13

Otherwise Unclassified Properties

Base Metal Price, % relative 27
2.6
Density, g/cm3 7.8
7.8
Embodied Carbon, kg CO2/kg material 4.5
1.5
Embodied Energy, MJ/kg 65
20
Embodied Water, L/kg 210
50

Common Calculations

Resilience: Ultimate (Unit Rupture Work), MJ/m3 48
77 to 120
Resilience: Unit (Modulus of Resilience), kJ/m3 180
420 to 840
Stiffness to Weight: Axial, points 14
13
Stiffness to Weight: Bending, points 25
24
Strength to Weight: Axial, points 18
21 to 24
Strength to Weight: Bending, points 18
20 to 22
Thermal Shock Resistance, points 11
18 to 20

Alloy Composition

Carbon (C), % 0.2 to 0.6
0.43 to 0.48
Chromium (Cr), % 28 to 32
0.4 to 0.6
Iron (Fe), % 40.8 to 53.8
96.5 to 97.7
Manganese (Mn), % 0 to 2.0
0.75 to 1.0
Molybdenum (Mo), % 0 to 0.5
0.15 to 0.25
Nickel (Ni), % 18 to 22
0.4 to 0.7
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