904L Stainless Steel Bar | ASTM B649 UNS N08904 Round Bars
Short Description:
Buy 904L stainless steel bar in round shape as per ASTM B649 UNS N08904. Corrosion-resistant, low carbon, suitable for chemical & marine use. Global supply from SAKYSTEEL.
904L Stainless Steel Bar:
86CRMOV7 (1.2327) Tool Steel is a high-performance alloy steel known for its excellent wear resistance, high toughness, and thermal stability. With a carefully balanced chemical composition, it offers superior hardenability and strength, making it ideal for demanding applications such as mold making, cutting tools, and industrial machinery. This tool steel is widely used in the automotive, aerospace, and defense industries, where durability and precision are critical. Its consistent performance under extreme conditions ensures reliability and longevity, making it a preferred choice for high-quality tooling solutions.
Specifications Of SS 904L Bar:
| 904L SS Round bar size | Diameter: 3-~800mm |
|---|---|
| Alloy 904L Hex Bar size | 2-100mm A/F |
| 904L Steel Flat bar size | Thickness: 2 -100mm |
| Width: 10 to 500mm | |
| ASTM A276 UNS N08904 Square bar size | 4 to 100mm |
| 904L Grade Stainless Steel Angle bar size (in mm) | 3*20*20~12*100*100 |
| 904L Stainless Steel Section | 3.0 to 12.0mm thickness |
| N08904 Stainless Steel Channel Bar (in mm) | 80 x 40 to 150 x 75 section; 5.0 to 6.0 thickness |
| Stainless Steel 1.4539 Hollow Bar (in mm) | 32 OD x 16 ID to 250 OD x 200 ID) |
| SS 904L Billet Size | 1/2" to 495mm Diameter |
| Stainless Steel 904L Rectangles Size | 33 x 30mm to 295 x 1066mm |
| Alloy 904L Round Bar Finish | Cold (bright) drawn, centreless ground, hot rolled, smooth turned, peeled, slit rolled edge, hot rolled annealed, Rough Turned, Bright, Polish, Grinding, Centreless Ground & Black |
| 904L Steel Round Bar Surface | Bright, Hot Rolled Pickled, Cold Drawn, Sand Blasting Finished, Polished, Hairline |
| 904L Stainless Steel Round Bar Condition | Hardened & tempered, annealed |
| Our 904L Steel Round bar conforms to NACE MR0175/ISO 15156 | |
904L Bar Technical Specifications :
| STANDARD | WERKSTOFF NR. | UNS | JIS | BS | KS | AFNOR | EN |
| SS 904L | 1.4539 | N08904 | SUS 904L | 904S13 | STS 317J5L | Z2 NCDU 25-20 | X1NiCrMoCu25-20-5 |
| C | Si | Mn | P | S | Cr | Ni | Mo | Cu | Fe |
| 0.02 | 1.0 | 2.0 | 0.045 | 0.035 | 19.0-23.0 | 23.0-28.0 | 4.0-5.0 | 1.0-2.0 | Balance |
| Density | Melting Point | Tensile Strength | Yield Strength (0.2%Offset) | Elongation |
| 7.95 g/cm3 | 1350 °C (2460 °F) | Psi – 71000 , MPa – 490 | Psi – 32000 , MPa – 220 | 35 % |
List of 904L Stainless Steel Round Bar Types
| Stainless Steel 904L Round Bar | ASTM A276 UNS N08904 Flat Bar |
| 904L SS Bar | 904L Steel Flat Bar Black |
| Alloy 904L Rounds | 904L Grade Stainless Steel Flat Bar Bright |
| 904L Steel Bright Bar | 904L Stainless Steel Flat Bar Polished |
| ASTM A276 UNS N08904 Rods | 904L SS Flat Bar Cold Drawn |
| Alloy 904L Square Bar Cold Drawn | 904L SS Bright Bar material |
| 904L Grade Stainless Steel Rod | Stainless Steel 904L Flat Bar Annealed |
| 904L Stainless Steel Round Bars | 904L SS Flat Bar stock |
| N08904 Stainless Steel Hex Bar | Alloy 904L Threaded Bar |
| 904L SS Square Bar Polished | Stainless Steel 904L Bright Bar Hot Rolled |
| SS 904L Hex Bar Bright | ASTM A276 UNS N08904 Hollow Bar |
| Stainless Steel 1.4539 Rectangular Bar Annealed | 904L Steel Polished Hex Bar |
| Stainless Steel 904L Hex Bar Polished | 904L Grade Stainless Steel Hexagonal Bar |
| SS 904L Rectangular Bar | N08904 Stainless Steel Threaded Bar Black |
| 904L Steel Hex Bar Annealed | N08904 Stainless Steel Cold Drawn Round Bar |
| 904L Grade Stainless Steel Forged Bar | Stainless Steel 1.4539 Polished Bar |
904L Stainless Steel Bar Supply Condition:
To help you better choose the material condition you need, we provide the following supply condition codes and their corresponding processes. Different treatments affect the physical and mechanical properties of the material, so please refer to these descriptions based on your requirements when selecting.
| Code | Condition |
|---|---|
| A | Annealed |
| B | Shot Blasted |
| C | As Casted |
| E | Reeled/Skin Pass |
| H | Precipitation Hardening |
| HR | Hot Rolled |
| I | Straightened |
| K | Cut Edge |
| L | Polished |
| M | Cold Rolled |
| P | Pickled |
| S | Shaved |
| V | Slit |
| W | Cut |
| X | Temper |
| CD | Cold Draw |
| CG | Centerless Ground |
| PL | Turned or Peeled |
904L Bar UT Test
Ultrasonic Testing (UT) is a critical non-destructive testing method performed on 904L stainless steel bars to detect internal flaws such as cracks, voids, and inclusions. Using high-frequency sound waves, UT inspection ensures the bar's structural integrity and verifies compliance with stringent quality standards. All SAKYSTEEL 904L bars undergo 100% ultrasonic testing according to ASTM A388 or equivalent standards, providing customers with high-reliability assurance for applications in pressure vessels, chemical processing, and marine environments. UT test results are available upon request and are included in the Mill Test Certificate (MTC) for traceability.
904L Bright bar Concentricity test
Concentricity Test is a precision inspection method used to verify the alignment between the outer and inner surfaces of a round component, such as a pipe, tube, or bar. In 904L stainless steel bars or precision-engineered parts, maintaining tight concentricity is essential to ensure uniform wall thickness, mechanical balance, and high-performance integrity during machining or rotation. This test is typically performed using dial indicators, laser alignment tools, or coordinate measuring machines (CMM) to measure the deviation between the centerlines. At SAKYSTEEL, all critical components can be inspected for concentricity upon request to meet high-precision application standards in aerospace, medical, and engineering industries.
AISI 904L rod Bending Test
The bend test is a mechanical inspection method used to evaluate the ductility, strength, and soundness of metallic materials such as stainless steel bars, plates, or welded joints. During the test, a specimen is bent at a specified angle or radius to check for surface cracks, fractures, or other signs of failure. For materials like 904L stainless steel, the bend test helps ensure that the product can withstand deformation without losing structural integrity. At SAKYSTEEL, bend testing is conducted in accordance with ASTM or EN standards, and results are included in the quality inspection report upon request, ensuring our products meet the highest performance and safety requirements.
UNS N08904 Bar Applications
904L stainless steel bars are commonly used in heavy-duty structural and anti-corrosion environments due to their high strength, excellent weldability, and superior resistance to acids and chlorides. Typical applications include:
1. Chemical & Petrochemical Equipment
• Shafts and connectors for acid storage tanks
• Pump shafts and agitator components used in sulfuric/phosphoric acid production
• Pressure-bearing parts in reactors and distillation columns
2. Marine & Offshore Structures
• Main shafts for seawater pumps
• Propeller hubs and drive shafts for marine vessels
• Structural supports for offshore platforms and underwater structures
3. Pulp & Paper Industry
• Press rolls and pulp agitator shafts in acidic bleaching environments
• Support rods for acidic pulp storage tanks
4. Pollution Control Systems
• Scrubber tower internals in flue gas desulfurization (FGD) systems
• Shafts and spacers for chlorine dioxide generation units
5. Oil & Gas Equipment
• Forged pressure components in downhole tools
• Valve stems and actuators in corrosive gas refining units
• Subsea connectors exposed to chloride stress corrosion
6. Pharmaceutical & Food Processing
• Large-diameter mixer shafts and support pins
• Corrosion-resistant parts in clean-in-place (CIP) systems
• Machined supports in acid-sensitive reaction vessels
7. Mechanical & Structural Components
• Custom machined flanges, bushings, and spacers
• Heavy-duty structural rods in high-salinity or acidic atmospheres
• Forging raw material for complex corrosion-resistant parts
Customer Case Studies
We have successfully served clients in the following industries:
• A desalination equipment manufacturer in the Netherlands – 904L welded pipes & flanges
• A petrochemical company in Saudi Arabia – 904L heavy plates for reactor linings
• A pharmaceutical equipment producer in Indonesia – polished 904L tubes for clean pipelines
Key Features of 904L Stainless Steel
Exceptional acid resistance: Particularly resistant to sulfuric, phosphoric, and organic acids
Excellent pitting and crevice corrosion resistance: Suitable for chloride-rich environments
Good weldability: Minimal degradation of corrosion resistance in welded zones
Low carbon content: Reduces risk of intergranular corrosion
High surface finish quality: Suitable for applications requiring clean and smooth surfaces
Stable austenitic structure: Resists phase transformation even at low temperatures
Frequently Asked Questions (FAQ)
Q1: Is 904L similar to Incoloy 825?
A: They are comparable in sulfuric acid resistance, but Incoloy 825 is a nickel-based alloy with a higher cost. 904L is a more economical alternative.
Q2: Can 904L be welded?
A: Yes, it is fully weldable using matching filler wire such as ER385 (904L).
Q3: Is 904L suitable for low-temperature applications?
A: Yes, its stable austenitic structure maintains performance at low temperatures.
Testing Methods
• Destructive
• Chemical
• Visual Inspection
• Third Party Inspection
• Flaring
• Non Destructive
• Mechanical
• NABL Lab Approved
• PMI
Why Choose us ?
• You can get the perfect material according to your requirement at the least possible price.
• We also offer Reworks, FOB, CFR, CIF, and door to door delivery prices. We suggest you to do deal for shipping which will be quite economical.
• The materials we provide are completely verifiable, right from raw material test certificate to the final dimensional statement.(Reports will show on requirement)
• We guarantee to give a response within 24hours(usually in the same hour)
• Provide SGS TUV report.
• We are fully dedicated to our customers. If it will not possible to meet your requirements after examining all options, we will not mislead you by making false promises which will create good customer relations.
• Provide one-stop service.
Our Services
1.Quenching and tempering
2.Vacuum heat treating
3.Mirror-polished surface
4.Precision-milled finish
4.CNC machining
5.Precision drilling
6.Cut into smaller sections
7.Achieve mold-like precision
Stainless steel bar Packaging:
1. Packing is quite important especially in a case of international shipments in which consignment pass through various channels to reach the ultimate destination, so we put special concern regarding packaging.
2. Saky Steel's pack our goods in numerous ways based on the products. We pack our products in multiple ways, such as,
