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My foreman told me to always add 2% more tin to the bronze mix for our marine fittings
I thought it was a waste of good metal, but after a year, his fittings showed zero corrosion while mine were starting to pit. Has anyone else found a specific alloy tweak that actually paid off?
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alicem297mo ago
Our old shop swore by adding a half percent silicon to aluminum castings for engine brackets... stopped all the hot cracking.
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robert_campbell7mo ago
Yeah, and it works because silicon changes how the metal shrinks as it cools. The real trick is that half percent is a sweet spot for parts under load. Too much silicon makes the bracket too soft, too little and the cracks come back. Your old shop was basically fine-tuning the flexibility without making it weak.
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