ACI-ASTM CB6 Steel vs. ASTM A387 Grade 91 Class 2
Both ACI-ASTM CB6 steel and ASTM A387 grade 91 class 2 are iron alloys. They have 88% of their average alloy composition in common. There are 30 material properties with values for both materials. Properties with values for just one material (4, in this case) are not shown.
For each property being compared, the top bar is ACI-ASTM CB6 steel and the bottom bar is ASTM A387 grade 91 class 2.
Metric UnitsUS Customary Units
Mechanical Properties
Elastic (Young's, Tensile) Modulus, GPa | 200 | |
190 |
Elongation at Break, % | 18 | |
20 |
Fatigue Strength, MPa | 410 | |
330 |
Poisson's Ratio | 0.28 | |
0.28 |
Shear Modulus, GPa | 77 | |
75 |
Tensile Strength: Ultimate (UTS), MPa | 880 | |
670 |
Tensile Strength: Yield (Proof), MPa | 660 | |
470 |
Thermal Properties
Latent Heat of Fusion, J/g | 280 | |
270 |
Maximum Temperature: Mechanical, °C | 870 | |
600 |
Melting Completion (Liquidus), °C | 1440 | |
1460 |
Melting Onset (Solidus), °C | 1390 | |
1420 |
Specific Heat Capacity, J/kg-K | 480 | |
470 |
Thermal Conductivity, W/m-K | 17 | |
26 |
Thermal Expansion, µm/m-K | 10 | |
13 |
Electrical Properties
Electrical Conductivity: Equal Volume, % IACS | 2.2 | |
8.9 |
Electrical Conductivity: Equal Weight (Specific), % IACS | 2.6 | |
10 |
Otherwise Unclassified Properties
Base Metal Price, % relative | 12 | |
7.0 |
Density, g/cm3 | 7.8 | |
7.8 |
Embodied Carbon, kg CO2/kg material | 2.5 | |
2.6 |
Embodied Energy, MJ/kg | 36 | |
37 |
Embodied Water, L/kg | 130 | |
88 |
Common Calculations
PREN (Pitting Resistance) | 17 | |
13 |
Resilience: Ultimate (Unit Rupture Work), MJ/m3 | 150 | |
120 |
Resilience: Unit (Modulus of Resilience), kJ/m3 | 1110 | |
580 |
Stiffness to Weight: Axial, points | 14 | |
14 |
Stiffness to Weight: Bending, points | 25 | |
25 |
Strength to Weight: Axial, points | 32 | |
24 |
Strength to Weight: Bending, points | 26 | |
22 |
Thermal Diffusivity, mm2/s | 4.6 | |
6.9 |
Thermal Shock Resistance, points | 31 | |
19 |
Alloy Composition
Aluminum (Al), % | 0 | |
0 to 0.020 |
Carbon (C), % | 0 to 0.060 | |
0.080 to 0.12 |
Chromium (Cr), % | 15.5 to 17.5 | |
8.0 to 9.5 |
Iron (Fe), % | 74.4 to 81 | |
87.3 to 90.3 |
Manganese (Mn), % | 0 to 1.0 | |
0.3 to 0.6 |
Molybdenum (Mo), % | 0 to 0.5 | |
0.85 to 1.1 |
Nickel (Ni), % | 3.5 to 5.5 | |
0 to 0.4 |
Niobium (Nb), % | 0 | |
0.060 to 0.1 |
Nitrogen (N), % | 0 | |
0.030 to 0.070 |
Phosphorus (P), % | 0 to 0.040 | |
0 to 0.020 |
Silicon (Si), % | 0 to 1.0 | |
0.2 to 0.5 |
Sulfur (S), % | 0 to 0.030 | |
0 to 0.010 |
Titanium (Ti), % | 0 | |
0 to 0.010 |
Vanadium (V), % | 0 | |
0.18 to 0.25 |
Zirconium (Zr), % | 0 | |
0 to 0.010 |