ASTM B729 Alloy 20 Steel Pipe

ASTM B729 Alloy 20 (UNS N08020) pipe serves as a nickel-iron-chromium super-austenitic stainless steel, was designed to address specific industrial challenges. It was initially developed primarily to resist sulfuric acid corrosion. HT PIPE is a astm b729 uns n08020 Pipe supplier with 15+ export experience. Contact us for more information and quotes for free!

 

alloy n08020 pipe All-Around Corrosion Resistance

Sulfuric Acid Environments: ASTM B729 Alloy 20 Steel Pipe shows its exceptional stability in sulfuric acid over a wide range of concentrations and temperatures, far exceeding the performance of 316L and even higher-grade alloys.

 

Chloride Stress Corrosion Cracking (Cl-SCC): Standard austenitic stainless steels (304/316) are highly susceptible to brittle cracking in environments containing chlorides and tensile stresses. Alloy 20 offers exceptional resistance because of its high nickel content.

 

Pitting and Crevice Corrosion: The combined effects of molybdenum and nitrogen provide Alloy 20 pipe with excellent resistance to localized corrosion when handling media containing halides (such as chlorides and fluorides).

 

Other Media: ASTM B729 Alloy 20 Steel Pipe also has good corrosion resistance to phosphoric acid, nitric acid, and many organic acids (such as formic acid and acetic acid).

 

2.4660 Alloy 20 Seamless Tube Specification

Specification	ASTM B729, ASME SB 729, ASTM B468, ASME SB 468
Standard	GB, EN, DIN, DS, DTD, ASTM, SAE, ASME, AISI, JIS, TOCT, NF, AMS
Alloy 20 Tube Tolerances	+/- 0.030; tolerance may vary depending on grade and thickness
Seamless Tube Size	15 NB to 150 NB IN 1/2" OD - 12" OD
Welded Tube Size	1/2" OD - 12" OD Guage: 25 SWG - 10 SWG
Length	Upto 30 meters, Single Random, Double Random & Required Length End: Plain End, Beveled End, Treaded, or Custom Cut Lengths
WT	0.40 mm - 12.70 mm
Schedule	5, 10S, 10, 30, 40S, 40, 80, 80S, XS, 160, XXH
Swg & Bwg	10 Swg., 12 Swg., 14 Swg., 16 Swg., 18 Swg., 20 Swg.
Manufacturing Techniques	EFW, CDW, ERW, LSAW, DOM, Fabricated, Seam-Welded, Seamless, CEW, Redrawn, Welded

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Carpenter 20 Chemical Composition

Grade	Ni	C	Mn	P	S	Si	Cr	Nb	Mo	Cu
Alloy 20	32 - 38	0.02 max	1 - 2	0.02 max	0.005 max	0.7 max	19 - 21	0.1 - 0.3	2 - 3	3 - 4

 

b729 astm alloy 20 Mechanical and Physical Properties

ASTM B729 Alloy 20 Steel Pipe has high strength and toughness. This feature allows it to withstand high internal pressures and external loads. Furthermore, because its coefficient of thermal expansion is similar to that of carbon steel, thermal stress issues are relatively minimal when connected to carbon steel equipment.

nickel alloy 20 pipe Manufacturability and Weldability

Both seamless and welded pipes are available to produce. It use conventional pipemaking processes, such as extrusion, welding, and drawing.

 

Welding typically requires the use of compatible consumables, such as AWS A5.14 ER320LR (low-carbon grade) or ENi-CrMo-10, and adheres to strict welding procedure specifications to ensure that the corrosion resistance of the welded joint matches that of the parent material.

 

Alloy 20 Pipe Pressure Rating

Hastelloy C22 Pipe O.D. (in.)	Wall Thickness of Tube (inches)
	.028	.035	.049	.065	.083	.095	.109	.120
	Working Pressure (psig)
1/8	7900	10100
1/4	3700	4C22	7000	9500
5/16		3700	5400	7300
3/8		3100	4400	6100
1/2		2300	3200	4400
3/4			2200	3000	4000	4600
1				2200	2900	3400	3900	4300

 

 

 

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