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ACI-ASTM CK3MCuN Steel vs. ASTM Grade HK Steel

Both ACI-ASTM CK3MCuN steel and ASTM grade HK steel are iron alloys. They have a moderately high 91% of their average alloy composition in common.

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

Metric UnitsUS Customary Units

Mechanical Properties

Brinell Hardness 180
150
Elastic (Young's, Tensile) Modulus, GPa 200
200
Elongation at Break, % 39
11
Fatigue Strength, MPa 250
150
Poisson's Ratio 0.28
0.27
Shear Modulus, GPa 80
79
Tensile Strength: Ultimate (UTS), MPa 620
500
Tensile Strength: Yield (Proof), MPa 290
270

Thermal Properties

Latent Heat of Fusion, J/g 300
310
Maximum Temperature: Corrosion, °C 420
440
Maximum Temperature: Mechanical, °C 1090
1100
Melting Completion (Liquidus), °C 1460
1400
Melting Onset (Solidus), °C 1350
1350
Specific Heat Capacity, J/kg-K 460
480
Thermal Conductivity, W/m-K 12
15
Thermal Expansion, µm/m-K 16
17

Electrical Properties

Electrical Conductivity: Equal Volume, % IACS 1.9
2.0
Electrical Conductivity: Equal Weight (Specific), % IACS 2.1
2.3

Otherwise Unclassified Properties

Base Metal Price, % relative 29
25
Density, g/cm3 8.0
7.8
Embodied Carbon, kg CO2/kg material 5.6
4.4
Embodied Energy, MJ/kg 76
63
Embodied Water, L/kg 190
200

Common Calculations

PREN (Pitting Resistance) 45
27
Resilience: Ultimate (Unit Rupture Work), MJ/m3 200
48
Resilience: Unit (Modulus of Resilience), kJ/m3 210
190
Stiffness to Weight: Axial, points 14
14
Stiffness to Weight: Bending, points 24
25
Strength to Weight: Axial, points 21
18
Strength to Weight: Bending, points 20
18
Thermal Diffusivity, mm2/s 3.2
3.9
Thermal Shock Resistance, points 14
11

Alloy Composition

Carbon (C), % 0 to 0.025
0.2 to 0.6
Chromium (Cr), % 19.5 to 20.5
24 to 28
Copper (Cu), % 0.5 to 1.0
0
Iron (Fe), % 49.5 to 56.3
44.8 to 57.8
Manganese (Mn), % 0 to 1.2
0 to 2.0
Molybdenum (Mo), % 6.0 to 7.0
0 to 0.5
Nickel (Ni), % 17.5 to 19.5
18 to 22
Nitrogen (N), % 0.18 to 0.24
0
Phosphorus (P), % 0 to 0.045
0 to 0.040
Silicon (Si), % 0 to 1.0
0 to 2.0
Sulfur (S), % 0 to 0.010
0 to 0.040