Alloy 20

Alloy 20 is an iron-based, austenitic alloy. It includes a combination of nickel, iron, and chromium with additions of molybdenum and copper. Alloy 20 has great resistance to pitting and corrosion from chemicals containing sulfuric, nitric, and phosphoric acids. Common applications include, but are not limited to: chemical processing, chemical storage, food processing, and pharmaceutical equipment. Alloy 20 is also suitable for welding and fabrication. Additional niobium in Alloy 20 provides for stabilization in the construction of: piping, tanks, pumps, valves, and heat exchangers. However, per ASME specification, Alloy 20 is limited to a maximum temperature of 1000°F.

FIRST DISTRIBUTORS Product Availability

First Distributors can generally provide the items listed below for a one to three day delivery. Large quantites may be subject to a longer lead time for delivery. FIRST DISTRIBUTORS can also provide many sizes outside these ranges, however, they too may be susceptible to longer lead times.

Please note that the availability of USA vs import manufacturers may vary.




	Commodity Size Rating ASTM Specification




	Welded Pipe 6"-12" 10s, 40s ASTM 464


	Seamless Pipe ½"-8" 10s, 40s, 80s, 160 ASTM 729


	Butt Weld Fittings ½"-12" 10s, 40s, 80s ASTM 366


	Flanges ½"-12" 150#, 300# ASTM 462


	Pressure Fittings ½"-2" 3000# ASTM 462


	Stud Bolts ½"-4" Any Length ASTM 468


	Seamless Tubing 1/8" - 2" .095" Wall & Below ASTM 729


	Welded Tubing 1/8" - 2" .095" Wall & Below ASTM 464

Commodity	Size	Rating	ASTM Specification
Welded Pipe	6"-12"	10s, 40s	ASTM 464
Seamless Pipe	½"-8"	10s, 40s, 80s, 160	ASTM 729
Butt Weld Fittings	½"-12"	10s, 40s, 80s	ASTM 366
Flanges	½"-12"	150#, 300#	ASTM 462
Pressure Fittings	½"-2"	3000#	ASTM 462
Stud Bolts	½"-4"	Any Length	ASTM 468
Seamless Tubing	1/8" - 2"	.095" Wall & Below	ASTM 729
Welded Tubing	1/8" - 2"	.095" Wall & Below	ASTM 464

ALIASES

20 Cb-3 (® Carpenter Technology Corporation)
ATI 20 (® Allegheny Technologies Incorporated)
Incoloy Alloy 20 (® Special Metals)
Nickelvac 23 (® Allegheny Technologies Incorporated)
Nicrofer 3620 Nb (® ThyssenKrupp VDM)

FIRST DISTRIBUTORS offers a large selection of Incoloy 825 seamless pipe, welded pipe, buttweld fittings, forged steel fittings, flanges, and tubing.

CHEMICAL COMPOSITION




	Element Fe Ni Cr Mo Cu Nb + Ta Mn (max) Si (max) P (max) S (max) C (max)




	% Balance 32 to 38 19 to 21 2 to 3 3 to 4 (8 x C%) to 1 2 1 0.045 0.035 0.07