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          • 800-HPALLOY
          • 1985 E 500 N Windfall, IN 46076
            444 Wilson St Tipton, IN 46072
            Post Office Box 40 Tipton, IN 46072
            tel:8004725569

          CARPENTER® alloy 20Cb-3® (UNS N08020)

          Ni 35, Fe 37, Cr 20, Cu 3.5, Mo 2.5 Mn 2.00 C 0.07 Si 1.00 Cu 3.5 S 0.035 P 0.045


          High Performance Alloys stocks and produces this grade in the following forms: Bar, wire, sheet, plate, coil, fasteners and forgings. Request quote on this grade.

          Request a quote

          Overview

          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.

          Although normally considered a stainless steel, it has been classified as a nickel base.


          Chemistry

          Chemical Requirements

          Ni

          Cr

          Mo

          Mn

          C

          Si

          Fe

          Max

          38.00

          21.00

          3.00

          2.00

          0.07

          1.00

          Bal.

          Min

          32.00

          19.00

          2.00


          Tensile Data

          Mechanical Property Requirements

          Ultimate Tensile, min.

          Yield Strength,min. (0.2% OS)

          Elong. in 2 in. ( 50.8 mm), min.%

          R/A min.

          Hardness

          Cold Finished/Annealed

          Min

          80 KSi

          35 KSi

          30.0

          50.0

          Max

          Min

          551 Mpa

          241 MPa

          Max

          Hot Finished/Annealed

          Min

          80 KSi

          35 KSi

          30.0

          50.0

          Max

          Min

          551 MPa

          241 MPa

          Max


          Specifications

          Form

          Standard

          Metal Type

          UNS N08020

          Bar

          ASTM B473

          Wire

          ASTM B471

          Sheet

          ASTM B463

          Plate

          ASTM B463

          Fitting

          ASTM B366

          Forging

          ASTM B462

          Weld Wire

          ER320LR

          Weld Electrode

          E320LR


          Machining

          MACHINING DATA
          Carbide tools are suggested
          for rates better than 50% of Type 304.
          Machining Type Suggested starting rates are:
          Single Point turning : Roughing - 0.15" depth, 0.015"/rev feed -175 SFM
          Finishing - 0.025" depth, 0.007"/rev feed - 200 SFM
          Drilling : 1/4" Dia hole - 0.004"/rev feed - 60 SFM
          1/2" Dia hole - 0.007"/rev feed - 60 SFM
          3/4" Dia hole - 0.010"/rev feed - 60 SFM
          Reaming : Feed - same as drilling - 100 SFM
          Side and Slot Milling : Roughing - 0.25" depth - 0.007"/tooth feed - 125SFM
          Finishing - 0.050" depth - 0.009"/tooth feed - 140SFM
          These rates are for carbide tools,
          Type C-2 for roughing, drilling and reaming.
          Type C-3 for finishing.

           

          CARPENTER® and 20Cb-3® are registered trademarks of Carpenter Technology.

           



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