Brass free-cutting

C1018 (Standard) C1018 (Soft) 316 Stainless steel Brass (Free Cutting) A360 A380... 

A 99.5% Cu—0.5% Te alloy has been on the market for many years (78). The most widely used is alloy No. CA145 (number given by Copper Development Association, New York), nominally containing 0.5% tellurium and 0.008% phosphorous. The electrical conductivity of this alloy, in the aimealed state, is 90—98%, and the thermal conductivity 91.5—94.5% that of the tough-pitch grade of copper. The machinahility rating, 80—90, compares with 100 for free-cutting brass and 20 for pure copper. 

Free-cutting brass Cu 62,0 Zn 35,5 (fold d rawn 44 70 18 B80 Screws, nuts, gears, keys... 

Free available chlorine (FAC), 13 98 Freeboard area, 7 203-204 Free charge carriers, 23 35 Free-cutting brass, 7 697, 748 mechanical properties, 7 678t... 

B. Copper. Copper (mp 1,083°C), is a moderately soft metal which has a high electrical and thermal conductivity. Electrolytic copper, 99.9% pure, is used for electrical wire and free-cutting alloys, containing small amounts of sulfur or tellurium, are commonly used for sheet or bar stock. Copper may be machined, brazed, and soldered. However, because of its toughness, it is much less easy to machine than brass. It tends to work-harden but may be annealed by heating, followed by rapid quenching. 

Figure 9 Glow discharge mass spectra of NIST SRM 1103 Free Cutting Brass, demonstrating selective ion accumulation by using mass selective instability (a) low-mass cutoff, m/z 15 (b) low-mass cutoff, m/z 45. (From Ref. 36.)...

Dynamic range extension in GD quadrupole/ion-trap MS based on selective ion-accumulation (e.g. by mass-selective instability, single-frequency resonance ejection, combined rf-dc and entrance end-cap dc methods) allows the selective accumulation of the analyte ions and enables the dynamic range to be increased by a factor of 105 [233]. The linearities and relative trapping efficiencies of the previous methods were assessed with respect to the injection time and the methods were used for the GD ion-trap MS determination of major and minor constituents in NIST SRM 1103 Free Cutting Brass. 

Muntz metal. An alloy containing approximately 60% copper and 40% zinc a low percentage of lead is sometimes added for free-cutting. It is classified as a brass and used primarily for condenser tube plates and other electrical applications. It is formed by hot-working and is not amenable to coldworking. 

To produce a brass with excellent high-speed machining properties, known as free-cutting brass, 2% to 3% lead is added. 

Low Brass 240 Yellow Brass 268 Leaded Tube Brass 330 Leaded Tube Brass 3301 Leaded Tube Brass 331 Free Cutting Tube Brass 332 Low Leaded Brass 335 Medium Leaded Brass 340 High Leaded Brass 342 Manganese Brass 667... 

Alloy C36000 (free-cutting brass), sheet, rod 7.20-10.90 7.0... 

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