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ASTM Grade HN Steel vs. ACI-ASTM CK3MCuN Steel

Both ASTM grade HN steel and ACI-ASTM CK3MCuN steel are iron alloys. They have a moderately high 91% of their average alloy composition in common. There are 26 material properties with values for both materials. Properties with values for just one material (6, in this case) are not shown.

For each property being compared, the top bar is ASTM grade HN steel and the bottom bar is ACI-ASTM CK3MCuN steel.

Metric UnitsUS Customary Units

Mechanical Properties

Brinell Hardness 140
180
Elastic (Young's, Tensile) Modulus, GPa 200
200
Elongation at Break, % 9.0
39
Poisson's Ratio 0.28
0.28
Shear Modulus, GPa 77
80
Tensile Strength: Ultimate (UTS), MPa 500
620

Thermal Properties

Latent Heat of Fusion, J/g 310
300
Maximum Temperature: Corrosion, °C 420
420
Maximum Temperature: Mechanical, °C 1080
1090
Melting Completion (Liquidus), °C 1400
1460
Melting Onset (Solidus), °C 1350
1350
Specific Heat Capacity, J/kg-K 480
460
Thermal Conductivity, W/m-K 13
12
Thermal Expansion, µm/m-K 16
16

Otherwise Unclassified Properties

Base Metal Price, % relative 26
29
Density, g/cm3 7.9
8.0
Embodied Carbon, kg CO2/kg material 4.6
5.6
Embodied Energy, MJ/kg 66
76
Embodied Water, L/kg 180
190

Common Calculations

PREN (Pitting Resistance) 22
45
Stiffness to Weight: Axial, points 14
14
Stiffness to Weight: Bending, points 25
24
Strength to Weight: Axial, points 17
21
Strength to Weight: Bending, points 18
20
Thermal Diffusivity, mm2/s 3.5
3.2
Thermal Shock Resistance, points 11
14

Alloy Composition

Carbon (C), % 0.2 to 0.5
0 to 0.025
Chromium (Cr), % 19 to 23
19.5 to 20.5
Copper (Cu), % 0
0.5 to 1.0
Iron (Fe), % 44.9 to 57.8
49.5 to 56.3
Manganese (Mn), % 0 to 2.0
0 to 1.2
Molybdenum (Mo), % 0 to 0.5
6.0 to 7.0
Nickel (Ni), % 23 to 27
17.5 to 19.5
Nitrogen (N), % 0
0.18 to 0.24
Phosphorus (P), % 0 to 0.040
0 to 0.045
Silicon (Si), % 0 to 2.0
0 to 1.0
Sulfur (S), % 0 to 0.040
0 to 0.010