904L Stainless Steel Rod Bar

904L alloy is a super austenitic stainless steel designed for a variety of medium and high corrosion resistance environments. The high content of chromium and nickel, coupled with molybdenum and copper as a combination of components, ensure excellent corrosion resistance of the product.

With a high alloy chemical composition of 25% nickel and 4.5% molybdenum, 904L is superior to 316L and 317L stainless steels in resistance to chloride stress corrosion cracking, pitting and corrosion resistance.

The 904L alloy was originally developed for corrosion resistance in dilute sulfuric acid. It also has good corrosion resistance to other inorganic acids (such as hot phosphoric acid) and most organic acids.

The 904L alloy is easily welded and machined in standard shop manufacturing practices

Common Trade Names:

Alloy 904L / 904L Stainless Steel / N08904 / W.Nr:1.4539 / F904L /X1NiCrMoCuN25-20-5

Specifications：

ASTM A 240,ASTM B 625,ASME SA 240,ASTM SB 625

904L Stainless Steel Chemical Composition

Typical physical properties of grade 904L stainless steels

Mechanical properties of grade 904L stainless steels

Possible alternative grades to grade 904L stainless steels

Corrosion Resistance

Grade 904L stainless steels have excellent resistance to warm seawater and chloride attack. The high resistance of grade 904L against stress corrosion cracking is due to the presence of high amounts of nickel in its composition. Moreover, the addition of copper to these grades develops resistance to sulphuric acid and other reducing agents in both aggressive and mild conditions.

The corrosion resistance of grade 904L is intermediate between super austenitic grades, with 6% molybdenum content, and standard 316L austenitic grades. Grade 904L is less resistant to nitric acid than grades 304L and 310L, which are free of molybdenum. This steel grade needs to be solution treated following cold working, to achieve maximum stress corrosion cracking resistance under critical environments.

Fabrication Data

Heat Resistance

Grade 904L stainless steels offer good oxidation resistance. However, the structural stability of this grade collapses at high temperatures, particularly above 400°C.

Heat Treatment

Grade 904L stainless steels can be solution heat-treated at 1090 to 1175°C, following by rapid cooling. Thermal treatment is suitable for hardening these grades.

Welding

Welding of grade 904L stainless steels can be performed using all conventional methods. This grade does not require pre-heat and post-weld heat treatments. Grade 904L can be subjected to hot cracking in constrained weldment. Grade 904L electrodes and rods are used for welding grade 904L steels according to AS 1554.6.

Fabrication

Grade 904L stainless steels are high purity steels with low sulphur content. They can be machined using any standard methods. These grades can be readily bent to a small radius under cold conditions. Although subsequent annealing is not required in most cases, it should be carried out when the fabrication is performed under severe stress corrosion cracking conditions.

904L Stainless Steel Available Shape

904L Stainless Steel Size Range

»Round Bar & Square Bar & Hexagon Bar

● Diameter : φ8～φ300mm Length:10mm-6000mm

● Hot forging, Hot Rolling, Cold Drawing

● Bright Surface, Polished Surface, Black Surface

»Tube & Pipe:Seamless Tube& Welded Pipe

● Cold Drawing Seamless Pipe： φ1.0～φ220mm

● Hot Extrusion pipe: φ50～φ250mm

● Others : U Blend Tube and Elbow

»Hot Rolled Plate & Cold Rolled Sheet

● Cold Rolling Sheet Thickness: ≦2.0mm Width:≦1500m

● Hot rolling Plate Thickness: ≧4.0mm Width: ≦2500m

»Strip & Tape Ribbon

● Thickness: ≧ 0.01mm Width: 15mm-300mm

● Cold rolling BA Strip, Hard & Soft Condition

»Straight Length Wire & Spool Wire

● Welding Wire: φ 0.1mm～6.0mm Cut length Rod: φ1.0～φ8.0mm

● Package : 5-25kg/Spool or Box

FAQ

Q: What are your company's main products ?
A: Our main products are stainless steel plate/sheet, coil, round/square pipe, bar, nickel alloys, etc.
Q: How do you control quality ?
A: Mill Test Certification is supplied with shipment, Third Party Inspection is available. and we also get ISO,SGS,Alibaba Verified.
Q: What are the advantages of your company ?
A: We have many professionals, technical personnel, more competitive prices and best after-dales service than other stainless steel companies.
Q: How many coutries you already exported ?
A: Exported to more than 50 countries mainly from America, Russia, UK, Kuwait, Egypt, Turkey, Jordan,India, etc.
Q: Can you provide sample ?
A: Yes. We can provide the small samples in stock for free, as long as you contact us.Customized samples will take about 5-7 days.