Stainless Steel Bar 904L

904L (N08904,,14539) super austenitic stainless steel contains 14.0-18.0% chromium, 24.0-26.0% nickel, 4.5% molybdenum.

904L super austenitic stainless steel is a low carbon, high nickel, molybdenum austenitic stainless steel, which is the exclusive material of H·S company from France.

It has good activation - passivation conversion ability, excellent corrosion resistance, in non-oxidizing acid such as sulfuric acid, acetic acid, formic acid, phosphoric acid has good corrosion resistance, in neutral medium containing chloride ion has good pitting resistance, and has good crack corrosion resistance and stress corrosion resistance.

Applicable to all concentrations of sulfuric acid below 70℃, under normal pressure any concentration, any temperature of acetic acid, and formic acid and acetic acid in the mixture of corrosion resistance is also very good.

400 series stainless steel is an alloy of iron and carbon-chromium. This stainless steel has a martensitic structure and iron, so it has normal magnetic properties. 400 series stainless steel has strong resistance to high temperature oxidation, and compared with carbon steel, its physical and mechanical properties are further improved. Most 400 series stainless steels can be heat treated.

The commonly used 400 series stainless steel varieties include 430 type with 18% chromium and 410 and 904L types with 13% chromium, among which type 430 stainless steel is the most used. The 430 type stainless steel model is characterized by low price, low thermal expansion coefficient, and chloride stress corrosion resistance better than the 300 series stainless steel type; however, its disadvantage is that the formability, weldability and tensile strength are lower than that of the 304 type stainless steel model. , therefore, its field of use is limited. Under the same chromium content, in oxidizing media such as atmosphere, fresh water and nitric acid, the corrosion resistance of 400 series stainless steel is the same as that of 300 series stainless steel, and usually the corrosion resistance of 400 series stainless steel is better than that of 200 series stainless steel. . The addition of trace amounts of niobium, titanium, copper and aluminum to the 400 series stainless steel can improve its deep drawing performance, weldability, corrosion resistance and high temperature strength, and can partially replace the 304 type stainless steel model. At present, the 400 series stainless steel varieties after adding the above trace elements are SUS430LX, 430JIL, 904L, 445M2, NSS447M1 and so on. In the United States and Japan, these models are widely used in automobile exhaust pipes (type 409 and 410L), washing machine drums (type 430), kitchen utensils, home appliances, medical equipment, water heaters, roof panels, curtain walls and power plant equipment.
Super austenitic stainless steel 904L (00Cr20Ni25Mo4.5Cu;
UNS: N08904;
EN: 1.4539) is a low carbon, high-alloy austenitic stainless steel with excellent corrosion resistance in dilute sulfuric acid. It is designed for harsh corrosion conditions.
Has the high chromium content and plenty of nickel content, the addition of copper makes it have strong ability to resist acid, especially for chloride clearance corrosion and stress corrosion cracking are highly resistant, not easy to appear, erosion and fracture pitting resistance slightly better than other steel grade, good machinability and weldability, can be used for pressure vessels.

Equivalent Grades

Grade Euronorm China GB Japanese JIS
No.
904L 1.4539 00Cr20Ni25Mo4.5Cu SUS904L

Standard Specification

Section Round, Square, Hexagonal bar, oval, shaped
Diamater 0.254mm,1mm,10.0mm,25.4mm,50.8mm,76.2mm,101.6mm,127.0mm,152.4mm,300.0mm,600.0mm
Length Since the custom
Surface 2B, 2D, BA, NO.1, NO.4, NO.8, 8K, mirror, checkered, embossed, hair line, sand blast, Brush, etching, etc
Finish Hot rolled Bar (HR), Cold rolled Bar (CR), 2B, 2D, BA NO(8), SATIN (Met with Plastic Coated)
Form   Bars, Foils, Rolls, Plain Bar, Shim Bar, Perforated Bar, Chequered Bar, Strip, Flats,
 Blank (Circle), Ring (Flange) etc.

Composition content

Grade C Mn Si P S Cr Mo Ni Cu
904L Min.
Max.
≤0.03 ≤2.00 ≤1.00 ≤0.035 ≤0.03 18.0~20.0 3.0~4.0 23.0~25.0 4.0~5.0
Alloy and state :926,
Tensile strength (Rm N/mm2):490
Yield strength (RP0.2N/mm2):216,
Elongation A5% :35.
Density: 8.24 g/cm3

Characteristic machining technology


1D -- The surface has discontinuous granular shape, also known as fog surface.
Processing technology: hot rolling + annealing shot peening pickling + cold rolling + annealing pickling.
2D - A slightly silvery white colour.
Processing technology: hot rolling + annealing shot peening pickling + cold rolling + annealing pickling.
2B -- Silver white with better gloss and flatness than a 2D surface.
Processing technology: hot rolling + annealing shot peening pickling + cold rolling + annealing pickling + quenching and tempering rolling.
Ba - Excellent surface gloss, high reflectivity, like a mirror surface.
Processing technology: hot rolling + annealing shot peening pickling + cold rolling + annealing pickling + surface polishing + quenching and tempering rolling.
No.3 -- Good gloss, coarse grain surface.
Processing technology: polishing and tempering rolling for 2D or 2B with 100~120 abrasive materials (JIS R6002).
No.4 -- Good gloss, fine lines on the surface.
Processing process: polishing and tempering rolling for 2D or 2B with 150~180 abrasive materials (JIS R6002).
HL -- Silver grey with hair streaks.
Processing technology: 2D products or 2B products with appropriate granularity of abrasive materials for polishing the surface is a continuous abrasive grain.
MIRRO -- Specular.
Processing technology: 2D products or 2B products with appropriate granularity of the grinding material grinding and polishing to the mirror effect.

Price List

Stainless Steel 904L Bar Price List 904L Bar FOB Shanghai Per Unit (USD)
904L stainless steel Round Bar $10400.00-$10700.00
904L mirror Stainless Steel Bar $10950.00-$11000.00
904L Stainless Steel Black Bar $10800.00-$10950.00
904L Stainless Steel Square Bar $10400.00-$10700.00

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