AL-6XN (UNS N08367 / W.Nr. 1.4529)

AL-6XN alloy (UNS N08367 / W.Nr. 1.4529) is a low carbon, high purity, nitrogen-bearing “super-austenitic” stainless alloy. The AL-6XN alloy was designed to be a seawater resistant material and has since been demonstrated to be resistant to a broad range of very corrosive environments. The high strength and corrosion resistance of the AL6XN alloy make it a better choice than the conventional duplex stainless steels and a cost effective alternative to more expensive nickel-base alloys where excellent formability, weldability, strength and corrosion resistance are essential.

Equivalent Grades

Trademark	GB	GOST	ASTM	UNS	DIN	W.Nr.	NF	BS	JIS	SS
AL-6XN	–	–	–	N08367	–	1.4529	–	–	–	–

Chemical Composition, %

Alloy	C	Si	Mn	P	S	Cr	Ni	Mo	Cu	N	Fe
AL-6XN	≤0.03	≤1.00	≤2.00	≤0.040	≤0.030	20.0-22.0	23.5-25.5	6.0-7.0	≤0.75	0.18-0.25	Bal

Typical Physical and Mechanical Properties (RT, Annealed)

Density, g/cm3	Melting Point, ℃	Tensile Strength, MPa	Yield Strength, MPa	ELongation, %	Hardness, HB
8.0	1110-1210	552-758	≥230	≥35	/

Available Products and Specifications

Rod, Bar, Wire and Forgings	ASTM A479, ASTM B691, ASTM A194, ASTM B472, ASTM B564
Plate, Sheet and Strip	ASTM A240, ASTM B688
Pipe and Tube	ASTM A358, ASTM A312, ASTM A409, ASTM A813, ASTM A814, ASTM B690
Welding Product	–
Others	ASTM B366

Features

Excellent resistance to pitting and crevice corrosion in chloride solutions
Practical immunity to stress corrosion cracking in NaCl environments
High strength and toughness

Applications

AL-6XN alloy is well suited for such applications as:

Chemical process tanks and pipelines
Process systems for offshore oil and gas platforms
Condensers, heat exchangers and piping containingseawater or crude oil
Filter washers, vats and press rolls in pulpbleaching plants
Power plant flue gas scrubber environments
Tall oil distillation columns and packing
Desalination equipment and pumps
Service water piping systems for nuclearpower plants
Transformer cases exposed to marine environments • Pharmaceutical equipment (for product purity)
Food processing equipment