Stainless Steel 904L Square Bars are high-alloy austenitic stainless steel products engineered for extreme corrosion resistance and superior mechanical stability in aggressive industrial environments. Steel Icon Stainless Pvt. Ltd. manufactures premium-grade SS 904L square bars designed to meet the demanding requirements of chemical processing plants, offshore installations, power generation facilities, and structural engineering projects.These square bars are widely used where conventional stainless steel grades fail under high chloride exposure, acidic media, or high-pressure operating conditions. With exceptional resistance to pitting, crevice corrosion, and stress corrosion cracking, Stainless Steel 904L Square Bars deliver reliable performance in critical applications involving pipelines, pressure equipment, marine components, and heavy fabrication assemblies.
Stainless Steel 904L is a super austenitic stainless steel containing high levels of chromium, nickel, molybdenum, and copper. The typical composition includes approximately 19 to 23 percent chromium, 23 to 28 percent nickel, 4 to 5 percent molybdenum, and added copper to enhance resistance to sulfuric acid and other reducing environments. The low carbon content minimizes the risk of intergranular corrosion after welding. Metallurgically, Stainless Steel 904L Square Bars maintain a fully austenitic structure that provides excellent toughness, even at low temperatures. The high nickel content improves resistance to stress corrosion cracking, while molybdenum enhances protection against localized corrosion in chloride-rich environments. Copper addition improves performance in acidic process streams, particularly in chemical and petrochemical industries. These square bars offer high tensile strength, good yield strength, and impressive elongation properties. They retain structural stability under high temperatures and are suitable for use in heat exchangers, flue gas systems, and pressure vessels. Their excellent weldability and formability support complex fabrication requirements in industrial construction and mechanical engineering.
One of the most significant advantages of Stainless Steel 904L Square Bars is their outstanding resistance to corrosion in highly aggressive environments. They perform exceptionally well in seawater exposure, acidic chemical processing systems, and industrial atmospheres where other stainless steel grades may suffer from pitting or cracking.
Strength and durability are equally notable. These square bars withstand heavy mechanical loads and continuous stress in structural engineering applications. Their long service life reduces maintenance frequency and replacement costs in critical installations such as refineries and power plants. Stainless Steel 904L Square Bars also offer good fabrication characteristics. They can be welded, machined, and formed into precise shapes for industrial components, structural frameworks, and equipment supports. While the alloy content makes them more premium than standard grades, their long-term performance and reduced downtime make them cost-effective over the lifecycle of a project.
In the chemical and petrochemical industries, Stainless Steel 904L Square Bars Manufacturers supply high-performance square bars for reactors, heat exchangers, and acid handling systems exposed to sulfuric and phosphoric acids. The alloy’s superior corrosion resistance ensures safe and efficient process operations. For marine engineering and offshore infrastructure, Stainless Steel 904L Square Bars Suppliers provide materials used in structural supports, pump components, and marine fasteners operating in saltwater conditions. The resistance to chloride-induced pitting makes these bars suitable for long-term marine exposure.
In heavy fabrication and industrial construction, Stainless Steel 904L Square Bars Stockists maintain ready inventory for use in pressure equipment, flue gas desulfurization units, and structural frames in power plants. Their dimensional accuracy and strength support reliable assembly and long-term structural integrity. For global industrial projects and infrastructure development, Stainless Steel 904L Square Bars Exporters deliver certified square bars to international markets for oil refineries, desalination plants, and large-scale chemical facilities. Strict quality control and compliance with international standards ensure consistent performance across regions.
Stainless Steel 904L Square Bars are generally manufactured in accordance with ASTM A276 and ASTM A479 specifications, which cover stainless steel bars and shapes for structural and pressure applications. Under ASME standards, equivalent grades such as ASME SA276 and ASME SA479 are used for boiler, heat exchanger, and pressure vessel applications. These standards define chemical composition limits, mechanical property requirements, heat treatment conditions, and dimensional tolerances. Compliance ensures that Stainless Steel 904L Square Bars meet global quality benchmarks for use in chemical processing equipment, marine installations, and high-pressure industrial systems.
Steel products including square bars, round bars, pipes, tubes, plates, sheets, and coils are classified according to international standards such as ASTM, ASME, EN, DIN, JIS, and ISO. ASTM and ASME standards are widely applied in North America and the Middle East for industrial fabrication and pressure systems. EN and DIN standards govern European material specifications, while JIS standards are followed in Japanese industrial applications. ISO standards harmonize testing, quality control, and certification procedures worldwide. Stainless Steel 904L is identified by its alloy composition and performance characteristics, ensuring engineers and procurement specialists can accurately specify materials for structural engineering, piping systems, and corrosion-resistant process equipment.
American Metallix Steel Co. is one of the leading manufacturer and supplier of 904L Stainless Steel ASTM A276 Round Bar, SS 904L ASME SA 276 Polished Bar, 904L SS Black Bar, 904L Stainless Steel Rods, ASTM A276 SUS 904L Round Bar, ASME SA 276 904L Bar, Round Bar, Hex Bar at the best price in India.
Request Latest Price & Stock AvailabilityStainless Steel 904L Square Bars are available in multiple grades, sizes, finishes and production methods to meet industrial, structural, marine and engineering requirements.
| Specification | Details |
|---|---|
| Specifications | ASTM / ASME SA A582, A276, A564, ASTM A484, ASTM A484M |
| Range | 3.17 MM TO 350 MM DIA |
| Diameter | 25 mm to 152 mm |
| Tolerance | H8, H9 (DIN 671), H10, H11, ASTM A484, DIN 1013 |
| Finish | Bright, Polish & Black |
| Form | Square |
| Condition | Cold Drawn & Polished, Cold Drawn, Centreless Ground & Polished |
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Our Stainless Steel Square Bar conforms to Standard ISO 15156 / NACE MR0175.
The chemical composition of Stainless Steel Square Bars includes controlled amounts of carbon, chromium, manganese, nickel, phosphorus, sulfur and silicon for dependable industrial performance.
| C | Cr | Cu | Mn | Mo | Ni | P | S |
|---|---|---|---|---|---|---|---|
| 0.02 Max | 19.0 – 23.0 | 1.0 – 2.0 | 2.0 Max | 4.0 – 5.0 | 23.0 – 28.0 | 0.045 Max | 0.035 Max |
The table lists carbon, chromium, manganese, nickel, phosphorus, sulfur and silicon content for Stainless Steel 304, 304L, 316 and 316L Square Bars. All values represent percentage by weight unless otherwise stated.
The mechanical composition of Stainless Steel Square Bars includes controlled amounts of carbon, chromium, manganese, nickel, phosphorus, sulfur and silicon for dependable industrial performance.
| Grade | Tensile Strength (MPa) Min | Yield Strength 0.2% Proof (MPa) Min | Elongation (% in 50 mm) Min | Hardness Rockwell B (HR B) | Brinell (HB) |
|---|---|---|---|---|---|
| 904L | 490 | 220 | 36 | 70–90 Typical | 150 |
The table lists carbon, chromium, manganese, nickel, phosphorus, sulfur and silicon content for Stainless Steel 304, 304L, 316 and 316L Square Bars. All values represent percentage by weight unless otherwise stated.
