Super austenitic steel ASME SA269 · N08904

Short Description:

ASME SA269 904L Seamless Tubing, is classified as a corrosion-resistant austenitic stainless steel. It is designed to resist surface and internal corrosion under demanding operating conditions. Compared to standard carbon steel, it offers improved resistance to oxidation and chemical attack, making it suitable for process environments where reliability is required.

Tube Grade: N08904, 904L, EN 1.4539, UNS N08904

Tube Type: Seamless / Welded

Tube Form: Straight Tubing, Coiled Tubing, Cut-to-Length Pieces

Surface Finish: Annealed & Pickled (AP), Bright Annealed (BA), Mechanical Polished, Electropolished (EP)

Standards (ASME/ASTM): ASME SA269, ASTM A269

Standards (EN): EN 10216-5，EN 10217-7

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Product Detail

Product Tags

UNS N08904 (904L) Stainless Steel Tubing, 1.4539 Stainless Steel Tubing

Item	Specification / Details
Stainless Steel Tube	ASME SA269, ASTM A269
Tube Size	1/16″ OD to 5″ OD (1.59 mm to 127 mm)
Thickness Range	0.4 mm – 12.7 mm
Type	Seamless & Welded
Form	Round, Coiled, Cut-to-Length
Length	Single Random, Double Random & Custom Cut Lengths
End	Plain End, Beveled End
End Protection	Plastic Caps
Outside Finish	AP (Annealed & Pickled), BA (Bright Annealed), MP (Mechanical Polished), EP (Electro-polished)
Delivery Condition	Solution Annealed and Pickled, Bright Annealed
Inspection, Test Reports	Mill Test Certificates, EN 10204 3.1, Flaring Test, Flange Test, Hydrostatic or Nondestructive Electric Test
Packing	Packed in Wooden Crates, Plastic Bundles, or as per Customers Requests
Specials	Custom sizes and precision instrumentation tubing available upon request

UNS N08904 . 904L . 1.4539 Chemical Composition

Chemical Composition (in % by mass)

Grade	C (Max.)	Si (Max.)	Mn (Max.)	P (Max.)	S (Max.)	Cr	Ni	Mo	Cu	N (Max.)	Others
N08904	0.020	1.00	2.00	0.040	0.030	19.0 – 23.0	23.0 – 28.0	4.00 – 5.00	1.00 – 2.00	0.10
1.4539	0.020	0.70	2.00	0.030	0.010	19.0 – 21.0	24.0 – 26.0	4.00 – 5.00	1.20 – 2.00	0.15

UNS N08904 . 904L . 1.4539 Mechanical Property

Mechanical Property & Heat Treatment

Grade	Rp 0.2 Mpa (Min.)	Rp 1.0 Mpa (Min.)	Rm Mpa (Min. – Max.)	A (%) (Min.)	Hardness (HRB) (Max.)	Heat Treatment
N08904	220		490	35	90	Solution Annealed (Min. 1095°C)
1.4539	230	260	530 – 730	35		Solution Annealed