Name: Alloy 28
Brand: Ever Nickel
Price: 99.99 USD
Availability: InStock
Rating: 4.8 (50 reviews)

Alloy 28

Alloy 28 (UNS N08028, W. Nr. 1.4563) is a nickel-iron-chromium alloy with additions of molybdenum and copper. It has excellent resistance to both reducing and oxidizing acids, to stress-corrosion cracking, and to localise attack such as pitting and crevice corrosion. The alloy are especially resistant to sulphuric and phosphoric acid. Used for chemical processing, pollution control equipment, oil and gas well piping, nuclear fuel reprocessing, acid production and pickling equipment.

UNS N08028

ISO 4563-080-28-I

EN number 1.4563

EN name X 1 NiCrMoCu 31-27-4

W.Nr. 1.4563

SS 2584

DIN X 1 NiCrMoCuN 31 27 4

AFNOR Z1NCDU31-27-03

Data Sheet

Chemical Composition

		C	Si	Mn	Cr	Mo	Ni	Cu	S	P	Fe	N
alloy 28	Min %				26,0	3,00	30,0	0,60			balance
	Max %	0,03	1,0	2,50	28,0	4,00	34,0	1,40	0,030	0,030	balance
ASTM B 668 (S 080289 (Alloy 28)
1.4563	Min %				26,00	3,00	30,00	0,70
1.4563	Max %	0,02	0,70	2,00	28,00	4,00	32,00	1,50	0,010	0,030		0,110
(Key to steel 2010)
1.4563	Min %				26,00	3,00	30,00	0,70
1.4563	Max %	0,02	0,70	2,00	28,00	4,00	32,00	1,50	0,010	0,030		0,110
(Key to steel 2010)

Physical properties

Property	Value
Density: kg/dm3	8,0
Hardness: HB	<=215
polishable	yes

Temperature T °C/F (°C/F)	Specific heat J / kgK (Btu / lb °F)	Thermal conductivity W/mK (Btu·in / ft2·h·°F)	Electric resistance µΩ · cm (Ω circ mill / ft)	Modulus of elasticity kN/mm2 (103 ksi)	Expansion rate from 70°F bis T 10-6 / K (10-6 / °F)
20 / 68	450(--)	12 (--)	1,0 (--)	197 (--)
100 / 212					15,8 (--)
200 / 392					16,1 (--)
400 / 752					16,9 (--)
500 /932					17,3 (--)

Temperature	0,2 % Yield strength in high temperatures	1,0% Yieldstrength in high temperatures	Tensile strenght in high temperatures
°C / °F	Rp 0,2	Rp 0,2	Rm
	N/mm2 / ksi	N/mm2 / ksi	N/mm2 /ksi
50 / 122	200 / 29	200 / 29	485 / 70,3
100 / 212	190 / 27,5	190 / 27,5	460 / 66,7
200 / 392	160 / 23,2	160 / 23,2	430 / 62,3
300 / 572	150 / 21,7	150 / 21,7	400 / 58,0
400 / 752	135 / 19,6	135 / 19,6
500 / 932	120 7 17,4	120 7 17,4
ksi value calculated

Mechanical properties (20°C / 68°F)

0,2% Yield strength (Mpa / ksi)	<214 / <73
Tensile strength (Mpa/ ksi)	<500 /<73
Elongation %	40	2 in(50,88mm)

Temparature information

Application area
Operation temperature	ºF to 662 ºF	admitted operating temperature

Solution heat treatment
Working temperature	1958 ºF to 2102 ºF
Explanation report	cool down: air ;water

Solution heat treatment
Working temperature	1562 ºF to 2102 ºF
Explanation report	cool down:air

Standards / information

Standards	Desciption
ASTM B 668	Standard Specification for UNS N 08028 Seamless Pipe and Tube
ASTM B 709	Standard Specification for Iron-Nickel-Chromium-Molybdenum Alloy (UNS N08028) Plate,Sheet and Strip
DIN 10216-5 (11/2004+B1)	Seamless steel pipes under compression load Pipes made from stainless steel
DIN EN 10088-3 (09/2005)	stainless steels.Technical delivery conditions for semi-finished products,bars,rods,wire selection and bright products of corrosion resisting steels for general and construction purposes
DIN EN 10217-7	Welded steel pipes under compression load Pipes made from stainless steel
DIN EN 10297-2 (02/2006)	Welded circular steel pipes for machine construction and general technical service stainless steel. Pipes made from stainless steel

A brief history of Alloy 28

Originally developed in the mid-20th century, Alloy 28 was designed as a high-performance nickel-iron-chromium alloy to address the need for corrosion-resistant materials in aggressive chemical environments. With the addition of copper and molybdenum, this alloy demonstrated exceptional resistance to strong acids, such as sulfuric and phosphoric acid, as well as chloride-induced stress corrosion. Over time, it became a widely used material in industries requiring robust corrosion resistance and mechanical reliability.

Common applications

Alloy 28 is commonly used in chemical processing plants for components such as heat exchangers, piping, and reaction vessels exposed to acidic or chloride-containing environments. In the oil and gas industry, it is used in sour gas wells, tubing, and other equipment requiring high resistance to hydrogen sulfide and carbon dioxide corrosion. Additionally, its durability makes it a preferred material for desalination plants and seawater systems where chloride-induced corrosion is a critical concern.

Resistance to corrosion and performance

Modern Innovations