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ACI-ASTM CB30 Steel vs. ASTM A356 Grade 9

Both ACI-ASTM CB30 steel and ASTM A356 grade 9 are iron alloys. Both are furnished in the heat treated (HT) condition. They have 80% of their average alloy composition in common. There are 28 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 CB30 steel and the bottom bar is ASTM A356 grade 9.

Metric UnitsUS Customary Units

Mechanical Properties

Brinell Hardness 210
200
Elastic (Young's, Tensile) Modulus, GPa 200
190
Poisson's Ratio 0.28
0.29
Shear Modulus, GPa 77
73
Tensile Strength: Ultimate (UTS), MPa 500
670
Tensile Strength: Yield (Proof), MPa 230
460

Thermal Properties

Latent Heat of Fusion, J/g 290
260
Maximum Temperature: Mechanical, °C 940
440
Melting Completion (Liquidus), °C 1430
1470
Melting Onset (Solidus), °C 1380
1430
Specific Heat Capacity, J/kg-K 480
470
Thermal Conductivity, W/m-K 21
41
Thermal Expansion, µm/m-K 11
13

Electrical Properties

Electrical Conductivity: Equal Volume, % IACS 2.5
7.5
Electrical Conductivity: Equal Weight (Specific), % IACS 3.0
8.6

Otherwise Unclassified Properties

Base Metal Price, % relative 10
3.6
Density, g/cm3 7.7
7.8
Embodied Carbon, kg CO2/kg material 2.3
2.4
Embodied Energy, MJ/kg 33
33
Embodied Water, L/kg 130
56

Common Calculations

PREN (Pitting Resistance) 20
4.7
Resilience: Unit (Modulus of Resilience), kJ/m3 140
570
Stiffness to Weight: Axial, points 14
13
Stiffness to Weight: Bending, points 25
24
Strength to Weight: Axial, points 18
24
Strength to Weight: Bending, points 18
22
Thermal Diffusivity, mm2/s 5.6
11
Thermal Shock Resistance, points 17
19

Alloy Composition

Carbon (C), % 0 to 0.3
0 to 0.2
Chromium (Cr), % 18 to 21
1.0 to 1.5
Copper (Cu), % 0 to 1.2
0
Iron (Fe), % 72.9 to 82
95.2 to 97.2
Manganese (Mn), % 0 to 1.0
0.5 to 0.9
Molybdenum (Mo), % 0
0.9 to 1.2
Nickel (Ni), % 0 to 2.0
0
Phosphorus (P), % 0 to 0.040
0 to 0.035
Silicon (Si), % 0 to 1.5
0.2 to 0.6
Sulfur (S), % 0 to 0.040
0 to 0.030
Vanadium (V), % 0
0.2 to 0.35