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ACI-ASTM CN7MS Steel vs. ASTM Grade HF Steel

Both ACI-ASTM CN7MS steel and ASTM grade HF steel are iron alloys. They have 80% of their average alloy composition in common. There are 30 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 HF steel.

Metric UnitsUS Customary Units

Mechanical Properties

Brinell Hardness 160
160
Elastic (Young's, Tensile) Modulus, GPa 200
200
Elongation at Break, % 39
29
Fatigue Strength, MPa 200
200
Poisson's Ratio 0.28
0.28
Shear Modulus, GPa 77
77
Tensile Strength: Ultimate (UTS), MPa 540
550
Tensile Strength: Yield (Proof), MPa 230
270

Thermal Properties

Latent Heat of Fusion, J/g 340
300
Maximum Temperature: Corrosion, °C 420
420
Maximum Temperature: Mechanical, °C 1040
1000
Melting Completion (Liquidus), °C 1400
1410
Melting Onset (Solidus), °C 1350
1370
Specific Heat Capacity, J/kg-K 480
480
Thermal Conductivity, W/m-K 12
16
Thermal Expansion, µm/m-K 16
16

Otherwise Unclassified Properties

Base Metal Price, % relative 28
17
Density, g/cm3 7.9
7.7
Embodied Carbon, kg CO2/kg material 5.1
3.2
Embodied Energy, MJ/kg 71
46
Embodied Water, L/kg 180
150

Common Calculations

PREN (Pitting Resistance) 28
21
Resilience: Ultimate (Unit Rupture Work), MJ/m3 170
130
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
20
Strength to Weight: Bending, points 19
19
Thermal Diffusivity, mm2/s 3.2
4.2
Thermal Shock Resistance, points 13
12

Alloy Composition

Carbon (C), % 0 to 0.070
0.2 to 0.4
Chromium (Cr), % 18 to 20
18 to 23
Copper (Cu), % 1.5 to 2.0
0
Iron (Fe), % 45.4 to 53.5
60 to 73.8
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
8.0 to 12
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