Tham khảo tài liệu 'asm metals handbook - desk edition (asm_ 1998) ww part 9', kỹ thuật - công nghệ, cơ khí - chế tạo máy phục vụ nhu cầu học tập, nghiên cứu và làm việc hiệu quả | CuCr10-M CM 204E CuS20-M CM 220E Introduction and Overview of Copper and Copper Alloys Wrought Copper Alloys The purpose of adding alloying elements to copper is to optimize the strength ductility formability and thermal stability without inducing unacceptable loss in fabricability electrical thermal conductivity or corrosion resistance. Copper alloys show excellent hot and cold ductility although usually not to the same degree as the unalloyed parent metal. Even alloys with large amounts of solution-hardening elements--zinc aluminum tin and silicon--that show rapid work hardening are readily commercially processed beyond 50 cold work before a softening anneal is required to permit additional processing. The amount of cold working and the annealing parameters must be balanced to control grain size and crystallographic texturing. These two parameters are controlled to provide annealed strip products at finish gage that have the formability needed in the severe forming and deep drawing commonly done in commercial production of copper brass and other copper alloy hardware and cylindrical tubular products. Table 6 lists chemical compositions of wrought coppers and copper alloys. Typical mechanical properties for these materials are given in Table 7. Table 6 Chemical compositions of wrought copper and copper alloys Composition values are given as maximum percentages unless shown as a range or maximum. Coppers Copper No. Designation Description Composition wt Cu min including Ag Ag min Troy oz As Sb P Te Other named elements C10100 OFE Oxygen-free electronic b . . c C10200 a OF Oxygen free . . . . . . O C10300 OFXLP . d . . . . . . C10400 a OFS Oxygen-free Ag with 8 . . . . . C10500 a OFS Oxygen-free Ag with 10 . . . . . C10700 OFS Oxygen-free with Ag 99J5 0e085 25 C10800 OFLP ggjs 0 05- 0 012 C10920 99J0 0 2 O C10930 99J0 0 44 13 0 2O C10940 99J0 0e085 25 0 2O C11000 a ETP .
