ACI-ASTM CF20 Steel vs. AWS BNi-5

ACI-ASTM CF20 steel belongs to the iron alloys classification, while AWS BNi-5 belongs to the nickel alloys. They have a modest 30% of their average alloy composition in common, which, by itself, doesn't mean much. There are 19 material properties with values for both materials. Properties with values for just one material (14, in this case) are not shown.

For each property being compared, the top bar is ACI-ASTM CF20 steel and the bottom bar is AWS BNi-5.

ACI-ASTM CF20 (SCS12, J92602) Cast Stainless Steel AWS BNi-5 (N99650) Filler Metal

Metric UnitsUS Customary Units

Mechanical Properties

Elastic (Young's, Tensile) Modulus, GPa		200
Elastic (Young's, Tensile) Modulus, GPa		190

Poisson's Ratio		0.28
Poisson's Ratio		0.29

Shear Modulus, GPa		77
Shear Modulus, GPa		72

Tensile Strength: Ultimate (UTS), MPa		530
Tensile Strength: Ultimate (UTS), MPa		470

Thermal Properties

Latent Heat of Fusion, J/g		300
Latent Heat of Fusion, J/g		470

Melting Completion (Liquidus), °C		1420
Melting Completion (Liquidus), °C		1140

Melting Onset (Solidus), °C		1410
Melting Onset (Solidus), °C		1080

Specific Heat Capacity, J/kg-K		480
Specific Heat Capacity, J/kg-K		510

Thermal Expansion, µm/m-K		17
Thermal Expansion, µm/m-K		12

Otherwise Unclassified Properties

Base Metal Price, % relative		16
Base Metal Price, % relative		55

Density, g/cm³		7.8
Density, g/cm³		7.7

Embodied Carbon, kg CO₂/kg material		3.1
Embodied Carbon, kg CO₂/kg material		8.9

Embodied Energy, MJ/kg		44
Embodied Energy, MJ/kg		130

Embodied Water, L/kg		150
Embodied Water, L/kg		260

Common Calculations

Stiffness to Weight: Axial, points		14
Stiffness to Weight: Axial, points		13

Stiffness to Weight: Bending, points		25
Stiffness to Weight: Bending, points		25

Strength to Weight: Axial, points		19
Strength to Weight: Axial, points		17

Strength to Weight: Bending, points		19
Strength to Weight: Bending, points		17

Thermal Shock Resistance, points		11
Thermal Shock Resistance, points		15

Alloy Composition

Aluminum (Al), %		0
Aluminum (Al), %		0 to 0.050

Boron (B), %		0
Boron (B), %		0 to 0.030

Carbon (C), %		0 to 0.2
Carbon (C), %		0 to 0.060

Chromium (Cr), %		18 to 21
Chromium (Cr), %		18.5 to 19.5

Cobalt (Co), %		0
Cobalt (Co), %		0 to 0.1

Iron (Fe), %		64.2 to 74
Iron (Fe), %		0

Manganese (Mn), %		0 to 1.5
Manganese (Mn), %		0

Nickel (Ni), %		8.0 to 11
Nickel (Ni), %		69.1 to 71.8

Phosphorus (P), %		0 to 0.040
Phosphorus (P), %		0 to 0.020

Selenium (Se), %		0
Selenium (Se), %		0 to 0.0050

Silicon (Si), %		0 to 2.0
Silicon (Si), %		9.8 to 10.5

Sulfur (S), %		0 to 0.040
Sulfur (S), %		0 to 0.020

Titanium (Ti), %		0
Titanium (Ti), %		0 to 0.050

Zirconium (Zr), %		0
Zirconium (Zr), %		0 to 0.050

Residuals, %		0
Residuals, %		0 to 0.5