Alloy 904L Nuts and Bolts

904L Fasteners

Lightning Bolt is world renown in the exotic alloy fastener market. One such alloy, 904L, is a non-stabilised low carbon high alloy austenitic stainless steel. The addition of copper to this grade gives it greatly improved resistance to strong reducing acids, particularly sulphuric acid. 904L Fasteners are highly resistant to chloride attack – both pitting / crevice corrosion and stress corrosion cracking.  More info for 904L fasteners are available in many different commodities. This grade is non-magnetic in all conditions and has excellent weldability and formability. The austenitic structure also gives this grade excellent toughness, even down to cryogenic temperatures. Due to its intrinsic anti-corrosive properties, 904L can be made into bolts, nuts, washers, studs, socket head cap screws, as well as a wide variety of other fasteners.

904L fasteners have very substantial contents of the high cost ingredients nickel and molybdenum. Many of the applications in which this grade has previously performed well can now be fulfilled at lower cost by duplex stainless steel 2205 (S31803 or S32205), so it is used less commonly than in the past.

Although originally developed for its resistance to sulphuric acid it also has a very high resistance to a wide range of environments. A PRE of 35 indicates that the material has good resistance to warm sea water and other high chloride environments. High nickel content results in a much better resistance to stress corrosion cracking than the standard austenitic grades. Copper adds resistance to sulphuric and other reducing acids, particularly in the very aggressive “mid concentration” range.

In most environments 904L has a corrosion performance intermediate between the standard austenitic grade 316L and the very highly alloyed 6% molybdenum and similar “super austenitic” grades. In aggressive nitric acid 904L has less resistance than molybdenum-free grades such as 304L and 310L. For maximum stress corrosion cracking resistance in critical environments the steel should be solution treated after cold work

Applications for 904L Fasteners :

  • Processing plant for sulphuric, phosphoric and acetic acids

  • Pulp and paper processing

  • Components in gas scrubbing plants

  • Seawater cooling equipment

  • Oil refinery components

For More Information or to Place Orders

Why Lightning Bolt for 904L Fasteners?

Lightning Bolt & Supply has been servicing North America’s industrial fastener needs for over 25 years.  Since then, our focus on the production of high quality parts at competitive pricing has allowed us to become an industry leader.  Our niche in exotic high nickel alloy fasteners include materials such as: hastelloy, Inconel, monel, A-286, 904L, Alloy-20, duplex stainless as well as many additional alloys.

Being centrally headquartered in Baton Rouge, Louisiana, we are capable of shipping to jobsites all over the world.  Many of our industrial projects that we supply material to include anchor bolts, and also stud bolts of many different ASTM grades.  These include B7, L7, B16, B8, B8M, stain hardened and many more.  In addition to being an ISO certified fastener manufacturer, we were awarded “Corporate Supplier of the Year” by WBENC.

To learn more about our products, or to place an order, please call (225) 272-6200 or send an email to sales@lightningbolt.cc.  For calls placed from outside of the United States, please call 001-225-272-6200.

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