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ASTM A182 Grade F12 Class 2 vs. ACI-ASTM CF20 Steel

Both ASTM A182 grade F12 class 2 and ACI-ASTM CF20 steel are iron alloys. They have 71% of their average alloy composition in common. There are 31 material properties with values for both materials. Properties with values for just one material (3, in this case) are not shown.

For each property being compared, the top bar is ASTM A182 grade F12 class 2 and the bottom bar is ACI-ASTM CF20 steel.

Metric UnitsUS Customary Units

Mechanical Properties

Brinell Hardness 180
160
Elastic (Young's, Tensile) Modulus, GPa 190
200
Elongation at Break, % 22
50
Fatigue Strength, MPa 220
240
Poisson's Ratio 0.29
0.28
Shear Modulus, GPa 73
77
Tensile Strength: Ultimate (UTS), MPa 540
530
Tensile Strength: Yield (Proof), MPa 310
250

Thermal Properties

Latent Heat of Fusion, J/g 250
300
Maximum Temperature: Mechanical, °C 430
970
Melting Completion (Liquidus), °C 1460
1420
Melting Onset (Solidus), °C 1420
1410
Specific Heat Capacity, J/kg-K 470
480
Thermal Conductivity, W/m-K 43
16
Thermal Expansion, µm/m-K 13
17

Electrical Properties

Electrical Conductivity: Equal Volume, % IACS 7.3
2.0
Electrical Conductivity: Equal Weight (Specific), % IACS 8.4
2.3

Otherwise Unclassified Properties

Base Metal Price, % relative 2.8
16
Density, g/cm3 7.8
7.8
Embodied Carbon, kg CO2/kg material 1.6
3.1
Embodied Energy, MJ/kg 21
44
Embodied Water, L/kg 52
150

Common Calculations

PREN (Pitting Resistance) 2.8
20
Resilience: Ultimate (Unit Rupture Work), MJ/m3 100
220
Resilience: Unit (Modulus of Resilience), kJ/m3 260
160
Stiffness to Weight: Axial, points 13
14
Stiffness to Weight: Bending, points 24
25
Strength to Weight: Axial, points 19
19
Strength to Weight: Bending, points 19
19
Thermal Diffusivity, mm2/s 12
4.3
Thermal Shock Resistance, points 16
11

Alloy Composition

Carbon (C), % 0.1 to 0.2
0 to 0.2
Chromium (Cr), % 0.8 to 1.3
18 to 21
Iron (Fe), % 96.4 to 98.3
64.2 to 74
Manganese (Mn), % 0.3 to 0.8
0 to 1.5
Molybdenum (Mo), % 0.44 to 0.65
0
Nickel (Ni), % 0
8.0 to 11
Phosphorus (P), % 0 to 0.040
0 to 0.040
Silicon (Si), % 0.1 to 0.6
0 to 2.0
Sulfur (S), % 0 to 0.040
0 to 0.040