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ASTM A182 F904L stainless steel WN flange

 ALLOY 904L • UNS N08904 • WNR 1.4539

904L stainless steel is also known as UNS N08904, WNR 1.4539, KS STS 317J5L, BS 904S13,WERKSTOFF NR. 1.4539, SUS 904l, EN X1NiCrMoCu25-20-5,SS2562 and DIN 17440.It is a fully austenic low-carbon variety of stainless steel with additives of molybdenum and copper. Its high nickel and chromium content make it corrosion resistant in both oxidizing and reducing environments. The copper and molybdenum help to make it resistant to pitting as well as crevice corrosion. The nickel content makes it resistant to chloride SCC and the low proportion of carbon makes it resistant to inter-granular corrosion. It is considered especially well-suited to handling sulfuric acid and phosphoric acid, though at high temperatures it may be subject to stress corrosion cracking.

In what forms is 904L available?
• Sheet
• Plate
• Bar
• Pipe & Tube (welded & seamless)
• Fittings (i.e. flanges, slip-ons, blinds, weld-necks, lapjoints, long welding necks, socket welds, elbows, tees, stub-ends, returns, caps, crosses, reducers, and pipe nipples)
• Wire

Alloy904L (UNS N08904) Chemical Composition, %

Ni

Fe

Cr

Mb

Cu

P

C

Mn

S

Si

23.0~28.0

Bal.

19.0~23.0

4.0~5.0

1.0~2.0

0.045

Max

0.02

Max

2.00

Max

0.035

Max

1.0

Max

ASTM Specifications

Pipe Smls

Pipe Welded

Tube Smls

Tube Welded

Sheet/Plate

Bar

Forging

Fitting

A312 B677

A312

A269 B677

A269 A249

A240 A480

A479 A484

A182

B366

 

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