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ACI-ASTM CK20 Steel vs. ACI-ASTM CC50 Steel

Both ACI-ASTM CK20 steel and ACI-ASTM CC50 steel are iron alloys. Both are furnished in the heat treated (HT) condition. They have 81% of their average alloy composition in common. There are 27 material properties with values for both materials. Properties with values for just one material (5, in this case) are not shown.

For each property being compared, the top bar is ACI-ASTM CK20 steel and the bottom bar is ACI-ASTM CC50 steel.

Metric UnitsUS Customary Units

Mechanical Properties

Brinell Hardness 150
210
Elastic (Young's, Tensile) Modulus, GPa 200
200
Poisson's Ratio 0.28
0.27
Shear Modulus, GPa 78
80
Tensile Strength: Ultimate (UTS), MPa 530
430

Thermal Properties

Latent Heat of Fusion, J/g 310
300
Maximum Temperature: Corrosion, °C 440
460
Maximum Temperature: Mechanical, °C 1100
1100
Melting Completion (Liquidus), °C 1400
1420
Melting Onset (Solidus), °C 1430
1370
Specific Heat Capacity, J/kg-K 480
490
Thermal Conductivity, W/m-K 14
17
Thermal Expansion, µm/m-K 15
11

Electrical Properties

Electrical Conductivity: Equal Volume, % IACS 2.0
2.3
Electrical Conductivity: Equal Weight (Specific), % IACS 2.3
2.7

Otherwise Unclassified Properties

Base Metal Price, % relative 25
14
Density, g/cm3 7.8
7.6
Embodied Carbon, kg CO2/kg material 4.4
2.7
Embodied Energy, MJ/kg 62
39
Embodied Water, L/kg 190
170

Common Calculations

PREN (Pitting Resistance) 26
28
Stiffness to Weight: Axial, points 14
15
Stiffness to Weight: Bending, points 25
26
Strength to Weight: Axial, points 19
16
Strength to Weight: Bending, points 19
17
Thermal Diffusivity, mm2/s 3.7
4.5
Thermal Shock Resistance, points 13
14

Alloy Composition

Carbon (C), % 0 to 0.2
0 to 0.5
Chromium (Cr), % 23 to 27
26 to 30
Iron (Fe), % 46.7 to 58
62.9 to 74
Manganese (Mn), % 0 to 2.0
0 to 1.0
Molybdenum (Mo), % 0 to 0.5
0
Nickel (Ni), % 19 to 22
0 to 4.0
Phosphorus (P), % 0 to 0.040
0 to 0.040
Silicon (Si), % 0 to 2.0
0 to 1.5
Sulfur (S), % 0 to 0.040
0 to 0.040