Alloy Tables

Alloy Options
Three metal alloys were candidates for the pedal system components --

Structural Aluminum A201 with a T7 Heat Treat

Structural Nickel Aluminum Bronze Alloy - A020 from Piad Precision

Structural Ductile Cast Iron - ASTM A536 100-70-03

	Requirement	Aluminum Alloy A201 T7	Nickel Aluminum Bronze - A020	Ductile Cast Iron A 536 100-70-03
*Ultimate Tensile Strength (ksI)*	>90	67	95-108	100
*Yield Strength (ksi)*	>50	60	58-68	70
*Elongation in 2"*	5%	5%	10%-6%	3%
*Elastic Modulus (MSI)*	--	10.3	17.5	24
*Density (g/cc)*	--	2.8	7.3	7.1
*Brinell Hardness (10mm/500kg)*	--	130	190-210	250
*Corrosion Resistance*	Fair	Fair	Excellent	Fair

Which material (aluminum, nickel aluminum bronze or ductile cast iron) best meets the requirements for tensile and yield strengths and ductility with acceptable corrosion resistance, weight, and elastic modulus?