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Stainless Steel 904L Bar | N08904 Properties

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Stainless Steel 904L Round Bar & Rods Supplier

904l Stainless Steel Round Bar is an austenitic grade alloy. If compared to alloy grade 316l, the addition of molybdenum content in the alloy of Stainless Steel 904L Square Bar gives it superior resistance to localized assault such as pitting as well as crevice corrosion. In fact, the Stainless Steel 904L Bar proves to be a rather useful resource in terms of its resistance against chlorides while proving to offer additional resistance to reducing acids.


Similar to many austenitic stainless steel alloys, 904L displays superior corrosion resistance properties. Initially, the use of this alloy was to combat decay that was a result of exposure to sulfuric acid. The main intention of designing grade 904l Stainless Steel Round Bar was to have an alloy that could sustain itself across varying concentrations of sulfuric acid. Unlike grades 304 or even alloy 316, sulfuric acid, which is a highly corrosive solution, has a minimal effect on the DIN 1.4539 Flat Bar between a temperature range of  35℃ to 40℃. Sulfuric acid, an oxidative acid can dissolve metals such as copper. In a concentrated condition, if exposed to water, the hygroscopic nature of this acid causes an exothermic reaction, which in turn is corrosive to many metals. Since the ASTM B649 type 904L Rod is relatively unaffected by this acid, it could be safely used for the transportation as well as the storage in sulfuric acid processing units. In addition to sulfuric acid, the UNS N08904 Hex Bar is not susceptible to decay in either organic or inorganic acids. Yet the same cannot be said for acids that contain halides. Acids that contain halide ions are highly aggressive and can easily corrode SS 904L Square Bar, which is why it is safer to use duplex stainless steel for those particular applications.

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Stainless Steel 904L Round Bar Specification

Specification

ASTM A276, A479, B649 UNS N08904, WS 1.4539, AFNOR Z2CNDU 25-20

Standard

ASTM, ASME, API, GB, AISI, DIN, EN, SUS, UNS

ASTM B649 UNS N08904 Round bar size

Diameter: 3~800mm

SS 904L Angle bar size

3*20*20mm~12*100*100mm

ASTM A479 904L Square bar size

4*4mm~100*100mm

Alloy 904L Billet Size

1/2" to 495mm Diameter

UNS N08904 Rectangles Size

33 x 30mm to 295 x 1066mm

Finish

Bright, Polish, Bright, Rough Turned, Grinding, Centreless Ground & Black

Tolerance

H8, H9, H10, H11, H12, H13, K9, K10, K11, K12 or as per clients’ requirements

Surface

Hot Rolled Pickled or Sand Blasting Finished, Cold Drawn, Bright, Polished, Hairline

Condition

Cold Drawnd Pulished Cold Drawn Centreless Ground & Polished, Annealed

Technique

904L Stainless Steel Hot Rolled, Cold Rolled, Cold Drawn, Forged

Where we export

USA, UAE, Malaysia, Poland, Singapore, Canada, Australia, Iran, UK, Italy

Form

Forging, Round-Rod, Rings, Half-Round, Round, Rectangle, Precision-Ground, Profiles, Square, Flat, I/H, Hex, Threaded, Ingot, Billet, Hollow, Angle, Blocks, Triangle, Rod, Channel, T-Bars

Our Stainless Steel 904L Round Bar conforms to NACE MR0175/ISO 15156


Types of Stainless Steel 904L Bars / Rods

Stainless Steel 904L Bright Bar

SS 904L Bright Bar
904L SS Bright Bar
Stainless Steel 904L Bright Bar
UNS N08904 SS Bright Bar
WERKSTOFF NR. 1.4539 Bright Bar
ASTM A276 904L Stainless Steel Bright Bar

Stainless Steel 904L Hex Bar

SS 904L Hex Bar
904L SS Hexagonal Bar
904L Stainless Steel Hex Bar
UNS N08904 SS Hexagonal Bar
ASTM A276 904L Stainless Steel Hex Bar

Stainless Steel 904L Square Bar

SS 904L Square Bar
904L SS Square Bars
904L Stainless Steel Square Bar
UNS N08904 SS Square Bar
WERKSTOFF NR. 1.4539 Square Bar
ASTM A479 904L Stainless Steel Square Bars

Stainless Steel 904L Rectangular Bar

SS 904L Rectangular Bar
904L SS Rectangular Bars
904L Stainless Steel Rectangular Bar
UNS N08904 SS Rectangular Bars
WERKSTOFF NR. 1.4539 Rectangular Bar
ASTM A276 904L Stainless Steel Rectangular Bar

Stainless Steel 904L Flat Bars

SS 904L Flat Bar
904L SS Flat Bars
904L Stainless Steel Flat Bars
UNS N08904 SS Flat Bars
WERKSTOFF NR. 1.4539 Flat Bars
ASTM A276 904L Stainless Steel Flat Bars

Stainless Steel 904L Polished Bar

SS 904L Polished Bar
904L SS Polished Bars
904L Stainless Steel Polished Bar
UNS N08904 SS Polished Bars
WERKSTOFF NR. 1.4539 Polished Bar
ASTM A476 904L Stainless Steel Polished Bar

Stainless Steel 904L Threaded Bar

SS 904L Bar
904L SS Threaded Bars
904L Stainless Steel Threaded Bar
UNS N08904 SS Threaded Bar
WERKSTOFF NR. 1.4539 Threaded Bar
ASTM A276 904L Stainless Steel Threaded Bar


Key Properties of 904L Stainless Steel Round Bars

Tensile Strength

The tensile strength of 904L stainless steel round bars is a key indicator of its ability to withstand mechanical stress without breaking. The minimum tensile strength for SS904L is 490 MPa (71 ksi), with some specifications reaching up to 515 MPa. This high tensile strength makes SS904L suitable for applications where the material will be subjected to significant mechanical loads.


Yield Strength

For 904L stainless steel round bars, the minimum yield strength is 220 MPa (31 ksi), ensuring the material maintains its shape under load. This property is crucial for ensuring that the material maintains its shape and integrity under stress. The relatively high yield strength of SS904L contributes to its robustness in demanding applications.


Corrosion Resistance

One of the standout features of SS 904L round bars is its superior corrosion resistance, particularly against reducing acids such as sulfuric and phosphoric acids. The high chromium, nickel, and molybdenum content contribute to its resistance to pitting, crevice corrosion, and chloride-induced stress corrosion cracking. This makes SS904L ideal for use in highly corrosive environments.


Weldability and Formability

Stainless Steel 904L round bars boasts excellent weldability and formability. It can be welded using conventional techniques without the need for preheating or post-weld heat treatment. This ease of fabrication makes it a preferred choice for complex assemblies and components.


Stainless Steel 904L Round Bar Sizes

Type

SIZES (mm)

SIZES (Inches)

ISO Tolerance

Cold Drawn and Polish

3.00 – 75.00

1/8″ – 3.00″

h8-h9-h10-h11

Cold Drawn and Ground

10.00 – 75.00

5/6″ – 2.50″

h8-h9-h10-h11

Peeled and Polished

40.00 – 150.00

1.50″ – 6.00″

h11, h11-DIN 1013

Peeled and Ground

20.00 – 50.00

3/4″ – 2.00″

h9-h10-h11


Applications and Industries Using 904L Stainless Steel Bars

Chemical and Petrochemical Industries

904L stainless steel Bars is extensively used in the chemical and petrochemical sectors. Its exceptional resistance to corrosion in both acidic and alkaline environments makes it ideal for these applications. Common uses include tanks, pipes, heat exchangers, and other components that handle corrosive chemicals.


Oil and Gas Industry

In the oil and gas industry, 904L stainless steel round bars are crucial for offshore platforms like the North Sea rigs, as well as oil refineries and pipelines. Their ability to withstand seawater and aggressive chemicals ensures long-lasting performance and safety in these demanding environments.


Marine and Desalination

The marine industry benefits significantly from the use of 904L stainless steel Bars due to its resistance to saltwater and environments with high chloride levels. It is commonly used in desalination plants and various marine components such as propeller shafts, fasteners, and pump parts, providing durability and reliability in harsh marine conditions.


Paper and Pulp Industry

Similarly, the paper and pulp industry uses 904L stainless steel Bars for digesters, evaporators, and other plant equipment. Its ability to withstand corrosive environments and high temperatures makes it suitable for these processes, ensuring longevity and efficiency.


Aerospace and Defense

When it comes to high-stakes environments like aerospace and defense, 904L stainless steel is the material of choice for high-performance parts and components. Its superior mechanical properties make it ideal for critical applications where strength and corrosion resistance at elevated temperatures are essential.


Power Generation and Energy Industry

In the power generation sector, 904L stainless steel Bars is employed in heat exchangers and other high-temperature components. Its ability to retain mechanical properties at elevated temperatures ensures reliable performance in power plants and energy systems.

JN Alloy is a distributor and product manufacturer of stainless steel, duplex steel, and nickel alloy.
Tel: +86 19339900211
Add: Stainless steel Market 289, Xinwu District , Wuxi, China
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