904L Nickel Alloy

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The 904L nickel alloy is a high-alloy austenitic stainless steel with low carbon content. Similar with other frequently used CrNi austenitic steel, the alloy 904L has excellent resistance to pitting and crevice corrosion, stress corrosion cracking and intergranular corrosion. In addition to this, it is also readily to be fabricated and welded.

The low carbon alloy can be used for oil and petrochemical equipment such as reactor, storage and transportation equipment for sulfuric acid, flue gas desulfurization unit in power plant, scrubber and fan in organic acid processing system, etc.

Specifications of 904L Nickel Alloy

UNS	W. Nr
N08904	1.4539

Chemical Compositions

Composition		Ni	Cr	Mo	Cu	Fe	C	Mn	P	S
Content (%)	Min.	24	19	4	1	Bal.
Content (%)	Max.	26	21	5	2	Bal.	0.02	2	0.03	0.015

Mechanical Properties (Minimum value at 20℃)

Tensile Strength (σb/MPa)	Yield Strength (σp0.2/MPa)	Elongation (σ5/%)
490	215	35

Product Forms and Standards

Bar	Forging	Sheet/Strip	Wire	Pipe	Welding wire
ASTM B 649	-	ASTM B 625	ASTM B 649	ASTM B6 77 ASTM B 673	AWS A5.9 ER385