ASTM B729 / ASME SB729 / Seamless UNS N08020, UNS N08026, and UNS N08024 Nickel Alloy Pipe supplier & distributor in India

ASTM B-729 / ASME SB-729

SPECIFICATION FOR SEAMLESS UNS N08020, UNS N08026, AND UNS N08024
NICKEL ALLOY PIPE AND TUBE

1.Scope

1.1 This specification covers UNS N08020, UNS N08026, and UNS N08024 seamless, cold-workd pipe and tube intended for general corrosive service.

1.2 The values stated in inch-pound units are to be regarded as the standard. The values given in parentheses are for information only.

1.3 The following safety hazards caveat perains only to the test methods portion, Section 10, of this specification: This standard does not purport to addres use. It is the responsibility of the user of this sandard to estoblis appropiate safety and health practices and detetmine the applicability of regulaory limitations prior to use.

TABLE1 CHEMICAL REQURIEMENTS

Element	Composition, %
Element	UNS B08026	UNS N08020	UNS B08024
Carbon, max	0.03	0.07	0.03
Manganese, max	1.000	2.00	1.000
Phosphorus, max	0.03	0.045	0.035
Sulfur, max	0.03	0.035	0.035
Silicon, max	0.50	1.00	0.50
Nickel	33.00-37.00	32.00-38.00	35.00-40.00
Chromium	22.00-26.00	19.00-21.00	22.50-25.00
Molybdenum	5.00-6.70	2.00-3.00	3.50-5.00
Copper	2.00-4.00	3.00-4.00	0.50-1.50
columbium(Nb)+tantalum	...	8×carbon-1.00	0.15-0.35
Nitrogen	0.10-0.16	...	...
Iron	remainderA	ramainderA	ramainderA

By difference.

TABLE2 MECHANICAL PROPERTY REQUIREMETNS

Tensile Strength, min		Yield Strength,A min		Elongation in 2 in.(50.8mm)or 4D min, %
ksi	MPa	ksi	MPa	Elongation in 2 in.(50.8mm)or 4D min, %
80	550	35	240	30.0

Yield strength shall be determined by the offset method at 0.2% limiting permanent set in accordance with Test Methods E 8.

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