Production Machining

SEP 2017

Production Machining - Your access to the precision machining industrial buyer.

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productionmachining.com :: 21 Helping Precision Machine Shops Be More ProducƟ ve and Profi table Technical Regulatory Management Quality Technical Regulatory Management Quality Craftsman's Cribsheet Miles Free – Director of Technology and Industry Research NUMBER 58 Relative Machinability of Materials Machinability of different materials is generally expressed as a percentage compared with a known standard. Carbon and alloy steels are compared with 1212. So are stainless steels. Coppers, brasses and bronzes are compared with 360 Brass. The benchmark grade for aluminum is 2011 at 100 percent. Generally speaking, shorter chips equal better machinability. CARBON & ALLOY STEELS BETTER MACHINABILITY WORSE MACHINABILITY 250% 12L14 +Te 12L14 416 430 440F Se 15-5/ 17-4 PH 304 316 303 430F 1215 11L17 1144 41L40 ann. 1018 1141 1045 4340 ann. E52100 4140 ann. 8620 200% 175% 150% 125% 100% (1212) 100% (1212) 75% 75% 50% 50% 25% 20% 10% 40% 30% 60% 50% 80% 90% 100% (360 Brass) 2011 6262 2024 7075 6061 353 Brass 360 Brass 145 Te Copper 464 Unleaded Naval Brass 110 Copper 624 792 Nickel Silver 485 Leaded Naval Brass 544 Phosphor Bronze 70% 40% 60% 50% 80% 90% 100% (2011) 70% 25% STAINLESS STEELS BRASS, COPPER, BRONZE ALUMINUM All Craftsman's Cribsheets are available for viewing and download at short.productionmachining.com/cribsheets.

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