What is ASTM A276 304 stainless steel bar?
ASTM A276 304 stainless steel bar is a hot-worked or cold-finished bar product that complies with the ASTM A276 standard, manufactured from Type 304 (UNS S30400) austenitic stainless steel. Its composition contains 18–20% chromium and 8–11% nickel, offering excellent corrosion resistance, formability, and weldability. It is widely utilized in fields such as chemical processing, food equipment, architectural components, fasteners, and mechanical parts.
What is ASTM A479 304 stainless steel bar?
ASTM A479 304 stainless steel bar is a hot-worked or cold-finished bar product that complies with the specifications of the ASTM A479/A479M standard. Specifically designed for use in boilers, pressure vessels, and high-temperature structural components, it is manufactured from Type 304 (UNS S30400) austenitic stainless steel. Its chemical composition features 18–20% chromium and 8–11% nickel, with a maximum carbon content of 0.08%. This material is suitable for applications involving heat exchangers, condensers, flanges, valves, as well as various components within the chemical, petrochemical, marine engineering, and pharmaceutical industries.
ASTM A276 304 vs. ASTM A479 304 Stainless Steel Bars
| Specification | ASTM A276 304 Stainless Steel Bars | ASTM A479 304 Stainless Steel Bars |
|---|---|---|
| Standard Application | Stainless steel bars and shapes for general structural and industrial applications | Stainless steel bars for pressure vessels, boilers, and other high-temperature or corrosive service applications |
| Grade | 304 | 304 |
| UNS Number | S30400 | S30400 |
ASTM A276 304 vs. ASTM A479 304：Chemical Composition (%)
| Element | ASTM A276 304 | ASTM A479 304 |
|---|---|---|
| Carbon (C) | ≤ 0.08 | ≤ 0.08 |
| Manganese (Mn) | ≤ 2.00 | ≤ 2.00 |
| Phosphorus (P) | ≤ 0.045 | ≤ 0.045 |
| Sulfur (S) | ≤ 0.030 | ≤ 0.030 |
| Silicon (Si) | ≤ 1.00 | ≤ 1.00 |
| Chromium (Cr) | 18.00 – 20.00 | 18.00 – 20.00 |
| Nickel (Ni) | 8.00 – 10.50 | 8.00 – 10.50 |
| Nitrogen (N) | ≤ 0.10 | ≤ 0.10 |
| Iron (Fe) | Balance | Balance |
ASTM A276 304 vs. ASTM A479 304：Mechanical Properties
| Property | ASTM A276 304 | ASTM A479 304 |
|---|---|---|
| Tensile Strength | ≥ 515 MPa (75 ksi) | ≥ 515 MPa (75 ksi) |
| Yield Strength (0.2% Offset) | ≥ 205 MPa (30 ksi) | ≥ 205 MPa (30 ksi) |
| Elongation | ≥ 40% | ≥ 35% |
| Hardness | ≤ 92 HRB | ≤ 92 HRB |
| Density | 7.93 g/cm³ | 7.93 g/cm³ |
| Modulus of Elasticity | 193 GPa | 193 GPa |
ASTM A276 304 vs. ASTM A479 304 Stainless Steel Bars: Which to Choose?
If your project requires compliance with the ASME Boiler and Pressure Vessel (B&PV) Code-typically designated as ASME SA479-then you must select the ASTM A479 standard. However, if you are sourcing raw materials for general manufacturing, machined parts, or structural handrails, ASTM A276 is the more suitable and versatile standard.
ASTM A276 304 Stainless Steel Bar Price per kg
The price of ASTM A276 Type 304/304L stainless steel bars typically ranges from $4.00 to $8.00 per kilogram (for standard industrial stock); however, for small-batch retail cuts, special surface finishes, or precision-machined cut-to-length products, prices may rise to over $12.00 to $25.00 per kilogram.
ASTM A479 304 Stainless Steel Bar Price per kg
When ordering ASTM A479 304 stainless steel bars in bulk directly from the factory, prices typically range from $1.85 to $4.00 per kilogram (approximately $0.85 to $1.80 per pound). However, for small-quantity retail cut pieces or bars requiring custom finishing, the price range rises to $5.00 to over $15.00 per kilogram, depending on the supplier and the manufacturing process involved.
ASTM A276 / A479 304 Stainless Steel Bars Supplier
We offer a comprehensive range of 304 stainless steel bar products, fully customizable to meet your specific project requirements:
Diverse Shapes: Round bars, hexagonal bars, square bars, and flat bars.
Dual Certification: Every bar is certified to comply with *both* ASTM A276 (General Grade) and ASTM A479 (Pressure Vessel Grade) standards.
Surface Finishes:
Black Surface (Hot-rolled/Forged)
Bright Surface (Cold-drawn/Centerless Ground/Polished)
Pickled Surface (Heat-treated and descaled)
Value-Added Processing Services:
Precision Cutting: Cut-to-length service with extremely tight tolerance control.
Chamfering: Chamfering of bar ends to facilitate subsequent machining operations.
Precision Grinding: Achieves ultra-high-precision diameter tolerances (h8, h9, f7).
304 Stainless Steel hexagonal bars
304 Stainless Steel flat bars
Contact us immediately to receive a highly competitive quote and a complete sample of our MTC (Mill Test Certificate).Mail:es@gescosteel.com
