1. Brief introduction:

   Alloy 20 is a Ni-Fe-Cr alloy with additions of Cu and Mo, and it also contains Nb for stabilization against sensitization and resultant intergranular corrosion.

   Alloy 20 has excellent resistance to general corrosion, pitting and crevice corrosion in chemicals containing chlorides and sulfuric,phosphoric and nitric acids.

   Alloy 20 is used for heat exchangers, tanks, piping, pumps, valves and other process equipment.

    

2. Main specifications:
   

   USA	Chinese	UNS	Werkstoff Nr.
   Alloy 20	NS143	N08020	2.4660

    

3. Chemical composition under ASTM B473-07 standard:

   Grade UNS N08020	chemical composition,%
   	Ni	Cr	Fe	Mo	Nb+Ta
   	32.0-38.0	19.0-21.0	Remainder	2.0-3.0	8*C-1.0
   Mn	C	Cu	Si	S	P
   ≤2.0	≤0.07	3.0-4.0	≤1.0	≤0.035	≤0.045

   
   

4. Main product types:

   wire,rod,forging, bar,strip,sheet/plate,tube/pipe.

    

5. Main produce standards:
   

   Wire,Rod, Bar	Forging	Plate/Sheet/Strip	Tube/Pipe	Fitting
   ASTM B472 ASTM B473 ASME SB472 ASME SB473	ASTM B462 ASME SB462	ASTM B463 ASME SB463	ASTM B464/B464M       ASTM B468 ASTM B729	ASTM B366/B366M-16

   
   

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