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ACI-ASTM CN7MS Steel vs. ASTM Grade HL Steel

Both ACI-ASTM CN7MS steel and ASTM grade HL steel are iron alloys. They have 88% of their average alloy composition in common. There are 28 material properties with values for both materials. Properties with values for just one material (2, in this case) are not shown.

For each property being compared, the top bar is ACI-ASTM CN7MS 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, % 39
11
Fatigue Strength, MPa 200
150
Poisson's Ratio 0.28
0.27
Shear Modulus, GPa 77
80
Tensile Strength: Ultimate (UTS), MPa 540
500
Tensile Strength: Yield (Proof), MPa 230
270

Thermal Properties

Latent Heat of Fusion, J/g 340
320
Maximum Temperature: Corrosion, °C 420
460
Maximum Temperature: Mechanical, °C 1040
1100
Melting Completion (Liquidus), °C 1400
1390
Melting Onset (Solidus), °C 1350
1340
Specific Heat Capacity, J/kg-K 480
490
Thermal Expansion, µm/m-K 16
17

Otherwise Unclassified Properties

Base Metal Price, % relative 28
27
Density, g/cm3 7.9
7.8
Embodied Carbon, kg CO2/kg material 5.1
4.5
Embodied Energy, MJ/kg 71
65
Embodied Water, L/kg 180
210

Common Calculations

PREN (Pitting Resistance) 28
31
Resilience: Ultimate (Unit Rupture Work), MJ/m3 170
48
Resilience: Unit (Modulus of Resilience), kJ/m3 140
180
Stiffness to Weight: Axial, points 14
14
Stiffness to Weight: Bending, points 25
25
Strength to Weight: Axial, points 19
18
Strength to Weight: Bending, points 19
18
Thermal Shock Resistance, points 13
11

Alloy Composition

Carbon (C), % 0 to 0.070
0.2 to 0.6
Chromium (Cr), % 18 to 20
28 to 32
Copper (Cu), % 1.5 to 2.0
0
Iron (Fe), % 45.4 to 53.5
40.8 to 53.8
Manganese (Mn), % 0 to 1.0
0 to 2.0
Molybdenum (Mo), % 2.5 to 3.0
0 to 0.5
Nickel (Ni), % 22 to 25
18 to 22
Phosphorus (P), % 0 to 0.040
0 to 0.040
Silicon (Si), % 2.5 to 3.5
0 to 2.0
Sulfur (S), % 0 to 0.030
0 to 0.040