Based in Houston, Texas, Louis Metals is a reputable producer and supplier of premium 304H stainless steel bars and rods. Austenitic stainless steel grade 304H is well-known for its exceptional strength at high temperatures, resistance to corrosion, and durability, making it the perfect choice for demanding industrial settings. Our bars and rods are expertly designed to satisfy global quality standards and serve a variety of uses in industries like power plants, heat exchangers, oil and gas, and chemical processing. Our goal at Louis Metals is to provide dependable stainless steel products that maintain structural integrity and long-term performance in crucial operations.
The main components of stainless steel 304H bars and rods are chromium (18–20%), nickel (8–11%), and a higher carbon content (0.04–0.10%) than 304, which improves high-temperature strength. Manganese, silicon, and trace amounts of sulphur and phosphorus are additional elements. In terms of mechanics, 304H provides outstanding elongation properties (minimum 40%), a yield strength of 205 MPa, and a tensile strength of about 515 MPa. The material is well suited for applications needing high creep resistance and strength because it retains its mechanical integrity under high-heat conditions and maintains good toughness even at cryogenic temperatures.
| Grade | Stainless Steel 304H (UNS S30409) |
|---|---|
| Specification | ASTM A276, ASTM A479 |
| Round bar size | Diameter: 3-~800mm |
| Hex Bar size | 2-100mm A/F |
| Flat bar size | Thickness: 2 -100mm |
| Width: 10 to 500mm | |
| Hollow Bar | 32 OD x 16 ID to 250 OD x 200 ID |
| Square bar size | 4 to 100mm |
| Section | 3.0 to 12.0mm thickness |
| Rectangles Size | 33 x 30mm to 295 x 1066mm |
| Billet Size | 1/2″ to 495mm Diameter |
| Channel Bar | 80 x 40 to 150 x 75 mm section; 5 to 6 mm thickness |
| Hollow Bar | 32mm OD x 16mm ID to 250mm OD x 200mm ID) |
| Angle bar size | 3*20*2~12*100*100 mm |
| Form | Rings, Profiles, Hollow, Flat Bar, Square, Round, Rectangle, Triangle, Rod, Half Round Bar, T-Bar, Hex (A/F), Precision Ground Bar, Channel Bar, Blocks, Round Rod, Threaded, Billet, Ingot, I/H Bar, Forging etc. |
| Technique | Cold Drawn, Rod, Hot Rolled, Cold Rolled, Forged Round Bar |
| Condition | annealed, Hardened & tempered |
| Surface | Cold Drawn, Polished, Bright, Hot Rolled Pickled, Sand Blasting Finished,Hairline |
| Element | SS 304H |
| C | 0.10 max |
| Ni | 8.0 – 10.5 |
| P | 0.045 max. |
| Mn | 2.00 max |
| Si | 0.75 max |
| S | 0.03 max. |
| Cr | 18.0 – 20.0 |
| Element | SS 304H |
| Melting Point | 1400 ℃ |
| Density | 8 |
| Hardness (Brinell) | 201 |
| Yield Strength (0.2%Offset) | 205 |
| Tensile Strength | 515 |
| Elongation | 40 |
|
Type |
SIZES (Inches) |
ISO Tolerance |
SIZES (mm) |
|---|---|---|---|
|
Peeled and Polished |
1.50″ to 6.00″ |
h11-DIN 1013 |
40.00 to 150.00 |
|
Cold Drawn and Ground |
5/6″ to 2.50″ |
h9-h8-h11-h10 |
10.00 to 75.00 |
|
Cold Drawn and Polish |
1/8″ to 3.00″ |
h9-h8-h11-h10 |
3.00 to 75.00 |
|
Peeled and Ground |
3/4″ to 2.00″ |
h10-h9-h11 |
20.00 to 50.00 |
| STANDARD | UNS | WERKSTOFF NR. |
| SS 304H | S30409 | 1.4301 |
Stainless Steel 304H has a higher carbon content (0.04–0.10%), which enhances its strength and heat resistance, making it suitable for high-temperature applications compared to 304 and 304L.
Industries such as petrochemical, power generation, chemical processing, and construction use Stainless Steel 304H for applications like heat exchangers, boilers, pressure vessels, and structural components.
Yes, Stainless Steel 304H is designed for excellent performance in high-temperature environments, maintaining strength and corrosion resistance in conditions up to 870°C (1600°F).
304H stainless steel bars and rods are widely used in industries where mechanical strength and resistance to high temperatures are essential. Boilers, pressure vessels, superheaters, heat exchangers, and power generation equipment are examples of common applications. They are perfect for processing machinery in the chemical and petrochemical industries that is subjected to high temperatures and corrosive conditions. Additionally, thermal power plants, fertiliser plants, and refineries use these bars and rods. 304H bars and rods are a dependable option for structural components under demanding circumstances because of their exceptional weldability and durability, guaranteeing longevity and safety in challenging operating environments.
We provide products that come with both mill test certificates and third-party test certificates, ensuring the highest standards of quality and compliance.
Louis Metals is a leading manufacturer, supplier, and exporter of high-quality bars, rods, and forgings, catering to various industries in Houston, USA
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