Stainless Steel 904L Flange Nut Fasteners

Alloy 904L (UNS N08904) is a superaustenitic stainless steel that is designed for moderate to high corrosion resistance in a wide range of process environments. The combination of high chromium and nickel content, coupled with additions of molybdenum and copper, assure good to excellent corrosion resistance.
With its highly alloyed chemistry — 25% nickel and 4.5% molybdenum, 904L provides good chloride stress corrosion cracking resistance, pitting and general corrosion resistance superior to 316L and 317L molybdenum enhanced stainless steels.
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Stainless Steel 904L Flange Nut Fasteners

904l nut

Common Applications of 904L

▲ Air Pollution Control — scrubbers for coal-fired power plants

▲ Chemical Processing — process equipment for the production of sulfuric, phosphoric, inorganic and organic acids and the production of phosphate-based fertilizers

▲ Metallurgical Processing — pickling equipment using sulfuric acid

▲ Oil and Gas Production — offshore process equipment

▲ Pharmaceutical Industry — process equipment

▲ Pulp and Paper — processing equipment

▲ Seawater and Brackish Water — condensers, heat exchangers and piping systems


904L Chemical Composition

Element

Percent by Weight

C

Carbon

0.09 maximum

Mn

Manganese

2.00 maximum

P

Phosphorous

0.045 maximum

S

Sulfur

0.035 maximum

Si

Silicon

1.00 maximum

Cr

Chromium

19.00 - 23.00 maximum

Ni

Nickel

23.00 – 28.00 maximum

Cu

Copper

1.00 – 2.00 maximum


flat washerstud
Stainless steel 904L washerStainless steel 904L stud

nylon nut thin nut 1
Stainless steel 904L Nylon nutStainless steel 904L nut


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