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SAE-AISI O7 Steel vs. ASTM Grade HL Steel

Both SAE-AISI O7 steel and ASTM grade HL steel are iron alloys. They have 49% of their average alloy composition in common. There are 20 material properties with values for both materials. Properties with values for just one material (12, in this case) are not shown.

For each property being compared, the top bar is SAE-AISI O7 steel and the bottom bar is ASTM grade HL steel.

Metric UnitsUS Customary Units

Mechanical Properties

Elastic (Young's, Tensile) Modulus, GPa 190
200
Poisson's Ratio 0.29
0.27
Shear Modulus, GPa 73
80
Tensile Strength: Ultimate (UTS), MPa 680 to 2110
500

Thermal Properties

Latent Heat of Fusion, J/g 250
320
Melting Completion (Liquidus), °C 1480
1390
Melting Onset (Solidus), °C 1430
1340
Specific Heat Capacity, J/kg-K 470
490
Thermal Expansion, µm/m-K 12
17

Otherwise Unclassified Properties

Base Metal Price, % relative 6.0
27
Density, g/cm3 7.9
7.8
Embodied Carbon, kg CO2/kg material 2.3
4.5
Embodied Energy, MJ/kg 33
65
Embodied Water, L/kg 52
210

Common Calculations

PREN (Pitting Resistance) 3.6
31
Stiffness to Weight: Axial, points 13
14
Stiffness to Weight: Bending, points 24
25
Strength to Weight: Axial, points 24 to 74
18
Strength to Weight: Bending, points 22 to 46
18
Thermal Shock Resistance, points 23 to 70
11

Alloy Composition

Carbon (C), % 1.1 to 1.3
0.2 to 0.6
Chromium (Cr), % 0.35 to 0.85
28 to 32
Copper (Cu), % 0 to 0.25
0
Iron (Fe), % 92.9 to 97.6
40.8 to 53.8
Manganese (Mn), % 0 to 1.0
0 to 2.0
Molybdenum (Mo), % 0 to 0.3
0 to 0.5
Nickel (Ni), % 0 to 0.3
18 to 22
Phosphorus (P), % 0 to 0.030
0 to 0.040
Silicon (Si), % 0 to 0.6
0 to 2.0
Sulfur (S), % 0 to 0.030
0 to 0.040
Tungsten (W), % 1.0 to 2.0
0
Vanadium (V), % 0 to 0.4
0