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SAE-AISI A7 Steel vs. ASTM Grade HL Steel

Both SAE-AISI A7 steel and ASTM grade HL steel are iron alloys. They have 54% of their average alloy composition in common. There are 20 material properties with values for both materials. Properties with values for just one material (10, in this case) are not shown.

For each property being compared, the top bar is SAE-AISI A7 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 72
80
Tensile Strength: Ultimate (UTS), MPa 800 to 2150
500

Thermal Properties

Latent Heat of Fusion, J/g 260
320
Melting Completion (Liquidus), °C 1470
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 10
27
Density, g/cm3 7.7
7.8
Embodied Carbon, kg CO2/kg material 13
4.5
Embodied Energy, MJ/kg 200
65
Embodied Water, L/kg 100
210

Common Calculations

PREN (Pitting Resistance) 11
31
Stiffness to Weight: Axial, points 13
14
Stiffness to Weight: Bending, points 25
25
Strength to Weight: Axial, points 29 to 77
18
Strength to Weight: Bending, points 25 to 48
18
Thermal Shock Resistance, points 27 to 72
11

Alloy Composition

Carbon (C), % 2.0 to 2.9
0.2 to 0.6
Chromium (Cr), % 5.0 to 5.8
28 to 32
Copper (Cu), % 0 to 0.25
0
Iron (Fe), % 81.4 to 87.7
40.8 to 53.8
Manganese (Mn), % 0 to 0.8
0 to 2.0
Molybdenum (Mo), % 0.9 to 1.4
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 0.5
0 to 2.0
Sulfur (S), % 0 to 0.030
0 to 0.040
Tungsten (W), % 0.5 to 1.5
0
Vanadium (V), % 3.9 to 5.2
0