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Carpenter® Alloy 20Cb-3® (UNS N08020) Ni 35, Fe 37, Cr 20, Cu 3.5, Mo 2.5

Excellent resistance to chemicals containing chlorides and sulfuric, phosphoric, and nitric acids. Resists pitting, crevice corrosion, SCC, and intergranular attack.

Pickling tanks, gas scrubbers, piping, heat exchangers, pumps, shafts and valves. Synthetic rubber, pharmaceutical production and other process equipment.

Alloy 20 is a highly alloyed iron-base nickel-chromium-molybdenum stainless steel developed primarily for use in the sulfuric acid related processes. Besides sulfuric acid related processes, some typical corrosion resistant applications for the alloy include chemical, pharmaceutical, food, plastics, synthetic fibers, pickling and FGD systems plus many others.
Unit of Measure

General Resistance

Unified Numbering System (UNS)

 N/A N08020

Mechanical Data

Single Point Turning

 N/A Finishing - 0.025" depth, 0.007"/rev feed - 200 SFM Roughing - 0.15" depth, 0.015"/rev feed -175 SFM

Drilling

 N/A 1/2" Dia hole - 0.007"/rev feed - 60 SFM 1/4" Dia hole - 0.004"/rev feed - 60 SFM 3/4" Dia hole - 0.010"/rev feed - 60 SFM

Reaming

 N/A 1/2" Dia hole - 0.007"/rev feed - 100 SFM 1/4" Dia hole - 0.004"/rev feed - 100 SFM 3/4" Dia hole - 0.010"/rev feed - 100 SFM

Side and Slot Milling

 N/A Finishing - 0.050" depth - 0.009"/tooth feed - 140SFM Roughing - 0.25" depth - 0.007"/tooth feed - 125SFM

Additional Information

Additional Information

 N/A Although normally considered a stainless steel, it has been classified as a nickel base. UNS N08020