Hardness Comparison

Yellow Brass (Copper Alloy #865)-

Yellow Brass, also considered a "Bronze", is 60% Copper, 33% Zinc, 2% Iron, 1.5% Aluminum, 1-5% Manganese, 1% Tin, .5% Nickel. Brinell Hardness of 100.

Nickel Aluminum Bronze (Alloy #958)-

This alloy is 79% Copper, 10% Aluminum, 4% Iron, 2% Manganese and 5% Nickel. This alloy is more durable than 100% copper, Red and Yellow Brass. Hardness is approximately 150-190.

Hardened Tool Steel

 Brinell hardness of around 40-50

Soft Steel

 Hardness of under 30 on Rockwell C scale, around 279 Brinell.

Aluminum

 Brinell hardness of around 70

Copper

Lead

 Brinell hardness of around 600 - 700+

 Brinell hardness usually in the 30's

Brinell is the scale used to compare the different hardnesses
of the metals described here.

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Malleable Iron

 Brinell hardness of around 134