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ASTM Grade HI Steel vs. ASTM Grade HL Steel

Both ASTM grade HI steel and ASTM grade HL steel are iron alloys. Both are furnished in the as-fabricated (no temper or treatment) condition. They have a moderately high 94% of their average alloy composition in common. There are 28 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 HI steel and the bottom bar is ASTM grade HL steel.

Metric UnitsUS Customary Units

Mechanical Properties

Brinell Hardness 160
150
Elastic (Young's, Tensile) Modulus, GPa 200
200
Elongation at Break, % 11
11
Fatigue Strength, MPa 150
150
Poisson's Ratio 0.27
0.27
Shear Modulus, GPa 79
80
Tensile Strength: Ultimate (UTS), MPa 550
500
Tensile Strength: Yield (Proof), MPa 270
270

Thermal Properties

Latent Heat of Fusion, J/g 310
320
Maximum Temperature: Corrosion, °C 450
460
Maximum Temperature: Mechanical, °C 1100
1100
Melting Completion (Liquidus), °C 1400
1390
Melting Onset (Solidus), °C 1350
1340
Specific Heat Capacity, J/kg-K 490
490
Thermal Expansion, µm/m-K 17
17

Otherwise Unclassified Properties

Base Metal Price, % relative 23
27
Density, g/cm3 7.8
7.8
Embodied Carbon, kg CO2/kg material 4.1
4.5
Embodied Energy, MJ/kg 59
65
Embodied Water, L/kg 200
210

Common Calculations

PREN (Pitting Resistance) 29
31
Resilience: Ultimate (Unit Rupture Work), MJ/m3 52
48
Resilience: Unit (Modulus of Resilience), kJ/m3 180
180
Stiffness to Weight: Axial, points 14
14
Stiffness to Weight: Bending, points 25
25
Strength to Weight: Axial, points 20
18
Strength to Weight: Bending, points 19
18
Thermal Shock Resistance, points 12
11

Alloy Composition

Carbon (C), % 0.2 to 0.5
0.2 to 0.6
Chromium (Cr), % 26 to 30
28 to 32
Iron (Fe), % 46.9 to 59.8
40.8 to 53.8
Manganese (Mn), % 0 to 2.0
0 to 2.0
Molybdenum (Mo), % 0 to 0.5
0 to 0.5
Nickel (Ni), % 14 to 18
18 to 22
Phosphorus (P), % 0 to 0.040
0 to 0.040
Silicon (Si), % 0 to 2.0
0 to 2.0
Sulfur (S), % 0 to 0.040
0 to 0.040