ACI-ASTM CF20 Steel vs. AWS BNi-1

ACI-ASTM CF20 steel belongs to the iron alloys classification, while AWS BNi-1 belongs to the nickel alloys. They have a modest 29% 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-1.

ACI-ASTM CF20 (SCS12, J92602) Cast Stainless Steel AWS BNi-1 (N99600) Filler Metal

Metric UnitsUS Customary Units

Mechanical Properties

Elastic (Young's, Tensile) Modulus, GPa		200
Elastic (Young's, Tensile) Modulus, GPa		180

Poisson's Ratio		0.28
Poisson's Ratio		0.3

Shear Modulus, GPa		77
Shear Modulus, GPa		70

Tensile Strength: Ultimate (UTS), MPa		530
Tensile Strength: Ultimate (UTS), MPa		450

Thermal Properties

Latent Heat of Fusion, J/g		300
Latent Heat of Fusion, J/g		360

Melting Completion (Liquidus), °C		1420
Melting Completion (Liquidus), °C		1040

Melting Onset (Solidus), °C		1410
Melting Onset (Solidus), °C		980

Specific Heat Capacity, J/kg-K		480
Specific Heat Capacity, J/kg-K		500

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		8.0

Embodied Carbon, kg CO₂/kg material		3.1
Embodied Carbon, kg CO₂/kg material		8.8

Embodied Energy, MJ/kg		44
Embodied Energy, MJ/kg		120

Embodied Water, L/kg		150
Embodied Water, L/kg		240

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		24

Strength to Weight: Axial, points		19
Strength to Weight: Axial, points		16

Strength to Weight: Bending, points		19
Strength to Weight: Bending, points		16

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), %		2.8 to 3.5

Carbon (C), %		0 to 0.2
Carbon (C), %		0.6 to 0.9

Chromium (Cr), %		18 to 21
Chromium (Cr), %		13 to 15

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

Iron (Fe), %		64.2 to 74
Iron (Fe), %		4.0 to 5.0

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

Nickel (Ni), %		8.0 to 11
Nickel (Ni), %		69.8 to 75.7

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), %		4.0 to 5.0

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