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ACI-ASTM CA6N Steel vs. ACI-ASTM CH20 Steel

Both ACI-ASTM CA6N steel and ACI-ASTM CH20 steel are iron alloys. Both are furnished in the heat treated (HT) condition. They have 80% of their average alloy composition in common. There are 31 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 CA6N steel and the bottom bar is ACI-ASTM CH20 steel.

Metric UnitsUS Customary Units

Mechanical Properties

Elastic (Young's, Tensile) Modulus, GPa 190
200
Elongation at Break, % 17
38
Fatigue Strength, MPa 640
290
Poisson's Ratio 0.28
0.27
Shear Modulus, GPa 75
78
Tensile Strength: Ultimate (UTS), MPa 1080
610
Tensile Strength: Yield (Proof), MPa 1060
350

Thermal Properties

Latent Heat of Fusion, J/g 280
310
Maximum Temperature: Corrosion, °C 390
440
Maximum Temperature: Mechanical, °C 740
1100
Melting Completion (Liquidus), °C 1440
1410
Melting Onset (Solidus), °C 1400
1430
Specific Heat Capacity, J/kg-K 480
480
Thermal Conductivity, W/m-K 23
14
Thermal Expansion, µm/m-K 9.9
15

Electrical Properties

Electrical Conductivity: Equal Volume, % IACS 2.6
2.0
Electrical Conductivity: Equal Weight (Specific), % IACS 3.0
2.3

Otherwise Unclassified Properties

Base Metal Price, % relative 11
20
Density, g/cm3 7.8
7.8
Embodied Carbon, kg CO2/kg material 2.5
3.7
Embodied Energy, MJ/kg 35
53
Embodied Water, L/kg 110
180

Common Calculations

PREN (Pitting Resistance) 12
25
Resilience: Ultimate (Unit Rupture Work), MJ/m3 180
200
Resilience: Unit (Modulus of Resilience), kJ/m3 2900
300
Stiffness to Weight: Axial, points 14
14
Stiffness to Weight: Bending, points 25
25
Strength to Weight: Axial, points 38
22
Strength to Weight: Bending, points 30
21
Thermal Diffusivity, mm2/s 6.1
3.7
Thermal Shock Resistance, points 40
15

Alloy Composition

Carbon (C), % 0 to 0.060
0 to 0.2
Chromium (Cr), % 10.5 to 12.5
22 to 26
Iron (Fe), % 77.9 to 83.5
54.7 to 66
Manganese (Mn), % 0 to 0.5
0 to 1.5
Molybdenum (Mo), % 0
0 to 0.5
Nickel (Ni), % 6.0 to 8.0
12 to 15
Phosphorus (P), % 0 to 0.020
0 to 0.040
Silicon (Si), % 0 to 1.0
0 to 2.0
Sulfur (S), % 0 to 0.020
0 to 0.040