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Properties of Common Materials Used In Main Cap Manufacturing
Materials currently used by Pro-Gram Engineering are indicate by an ( * )

Material SAE 1045* SAE 4140* 1018 / 1020 6061 Aluminum 7075 Aluminum* Grey Cast Iron Class 30 Nodular Iron Titanium*
Tensile Strength 90,500 148,000 55,000 45,000 83,000 30,000 60,000 144,000

Coefficient of Thermal Expansion @ 212 - 750 deg F.

5.9 - 7.5 8 - 8.3 (@ 1000 - 1800 deg) 5.9 - 7.5 11.7 - 13.7 11.7 - 13.7 0 - 6 6.6 - 10.4 4.3 - 7.5 (@ 1000 - 1800 deg)
Hardness in bhn 197 302 101 95 150 100 - 120 150 320 - 380



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