Kanakratna Steelage Private Limited
Mumbai, Maharashtra
GST No. 27AAECK9442R1ZP
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904L ROUND BAR
Typical applications include tanks, valves, heat exchangers, flanges and manifolds. The addition of copper to the composition of 904L aids its suitability for components such as tanks and other products used in handling sulphuric and phosphoric acid. Our WNR 1.4539Round Bars are accessible to our valuable customers in different range of diameters, wall thicknesses and sizes at quite affordable rates.
AISI 904L Stainless Steel Round Bars SpecificationSpecification : ASTM B649 / ASME SB649
Range : Range - 3.17mm to 350mm dia
Form : Round, Square, Hex (A/F), Rectangle, Billet, Ingot, Forging Etc.
Finish : Black, Bright Polished, Rough Turned, Matt Finish
Our SS 904L Round Bars conforms to NACE MR0175/ISO 15156
| Grade | Ni | Mo | Cr | Cu | C | Mn | Si | P | S |
| 904L | 23 – 28 | 4 – 5 | 19 – 23 | 1 – 2 | 0.02 max | 2.0 max | 1.0 max | 0.045 max | 0.035 max |
904L Round Bar
Minimum Order Quantity: 100 Kg
Product Brochure
| Material | Stainless Steel |
| Grade | STAINLESS STEEL 904L |
| Shape | Round |
| Material Grade | 304 |
| Usage/Application | Manufacturing |
Introduction
Stainless Steel 904L (UNS N08904 / WNR 1.4539) is a highly alloyed austenitic stainless steel containing high nickel, chromium, molybdenum, and copper. It is known for its superior corrosion resistance, especially against sulfuric acid, phosphoric acid, and chloride-induced pitting/crevice corrosion.
When produced in the form of round bars, 904L stainless steel finds extensive usage in chemical plants, seawater handling, pharmaceutical equipment, pulp & paper, gas scrubbing systems, and offshore industries.
Unlike conventional stainless steels (304/316), 904L is a super-austenitic stainless steel with very low carbon content, making it resistant to intergranular corrosion even after welding.
Chemical Composition of 904L Round Bar
| Element | Content (%) |
|---|---|
| Carbon (C) | ≤ 0.02 |
| Manganese (Mn) | ≤ 2.0 |
| Silicon (Si) | ≤ 1.0 |
| Phosphorus (P) | ≤ 0.045 |
| Sulfur (S) | ≤ 0.035 |
| Chromium (Cr) | 19 – 23 |
| Nickel (Ni) | 23 – 28 |
| Molybdenum (Mo) | 4 – 5 |
| Copper (Cu) | 1 – 2 |
| Iron (Fe) | Balance |
| Property | Value |
|---|---|
| Density | 8.0 g/cm³ |
| Melting Point | 1350 °C (approx.) |
| Electrical Resistivity | 0.92 μΩ·m at 20 °C |
| Thermal Conductivity | 12–15 W/m·K |
| Specific Heat | 500 J/kg·K |
| Elastic Modulus | 190–200 GPa |
| Magnetic Permeability | Non-magnetic in annealed condition |
| Property | Annealed Condition |
|---|---|
| Tensile Strength | 490 – 710 MPa |
| Yield Strength (0.2% proof) | ≥ 220 MPa |
| Hardness (Brinell) | ≤ 220 HB |
| Elongation | ≥ 35% |
| Impact Strength | High (Excellent toughness at sub-zero temperatures) |
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Chemical Testing (Spectrometer, OES)
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Mechanical Testing (Tensile, Hardness, Impact)
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Non-Destructive Testing (Ultrasonic, Eddy Current)
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Positive Material Identification (PMI)
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Corrosion Testing (Pitting, Crevice tests)
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Forms: Round bars, hex bars, square bars, forged bars.
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Packaging: Export-quality wooden boxes, bundles with end caps.
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Sizes: Dia 6mm to 300mm (custom sizes available).
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Surface: Bright polished, black, peeled, centerless ground.
Additional Information:
- Delivery Time: READY STOCK
- Packaging Details: The packaging of the product is done using an effective method of packaging. It all includes- • Shrink-wrapping • Bubble wrapping • Carton boxes • Wooden crates/pallets/boxes
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