ASTM A479 Stainless Steel Bars for Boilers
- Grade: 304, 304L, 304H, 304LN, 309S, 310S, 310H, 316, 316L, 316H, 316Ti, 316LN, 321, 321H, 347, 347H, 348, 348H, S38815, S31803, S32205, S32550, S32750, S32760, S32906, S40500,S43000, S43035, S44400, S43100
- Manufacturing Methods: hot-finished or cold-finished
- Shapes: Rounds, Squares, Hexagons, angles, T-Shapes, Channels
ASTM A479/A479M Stainless Steel Bars and Shapes for Use in Boilers and Other Pressure Vessels
Golden Sunbird Metals supplies premium ASTM A479 stainless steel bars for boilers and pressure vessels, engineered for strength, corrosion resistance, and reliable performance in demanding high-temperature environments. Conforming to ASTM A479/A479M, these bars are available in a wide range of grades, including 304, 316, 321, 347, duplex stainless steels, and ferritic grades, with production options in hot-finished or cold-finished forms. We offer multiple shapes such as rounds, squares, hexagons, angles, T-shapes, and channels, with dimensions designed to meet diverse industrial requirements. Suitable for boiler construction, pressure vessels, heat exchangers, chemical processing equipment, piping systems, and offshore applications, our stainless steel bars deliver consistent quality and long service life. With rigorous testing, inspection certificates, and dependable supply capability, Golden Sunbird Metals is your trusted source for ASTM A479 stainless steel solutions.
ASTM A479 Stainless Steel Bars for Boilers Chemical Composition (wt.%)
| Grade | C % | Mn % | P % | S % | Si % | Cr % | Ni % | Mo % | Other Elements |
| 304 | 0.08 | 2.00 | 0.045 | 0.030 | 1.00 | 18.0-20.0 | 8.0-11.0 | – | – |
| 304L | 0.03 | 2.00 | 0.045 | 0.030 | 1.00 | 18.0-20.0 | 8.0-13.0 | – | – |
| 304H | 0.04-0.10 | 2.00 | 0.045 | 0.030 | 1.00 | 18.0-20.0 | 8.0-11.0 | – | – |
| 304LN | 0.03 | 2.00 | 0.045 | 0.030 | 1.00 | 18.0-20.0 | 8.0-11.0 | – | – |
| 309S | 0.08 | 2.00 | 0.045 | 0.030 | 1.00 | 22.0-24.0 | 12.0-15.0 | – | – |
| 310S | 0.08 | 2.00 | 0.045 | 0.030 | 1.50 | 24.0-26.0 | 19.0-22.0 | – | – |
| 310H | 0.04-0.10 | 2.00 | 0.045 | 0.030 | 1.50 | 24.0-26.0 | 19.0-22.0 | – | – |
| 316 | 0.08 | 2.00 | 0.045 | 0.030 | 1.00 | 16.0-18.0 | 10.0-14.0 | 2.0-3.0 | – |
| 316L | 0.03 | 2.00 | 0.045 | 0.030 | 1.00 | 16.0-18.0 | 10.0-14.0 | 2.0-3.0 | – |
| 316H | 0.04-0.10 | 2.00 | 0.045 | 0.030 | 1.00 | 16.0-18.0 | 10.0-14.0 | 2.0-3.0 | – |
| 316Ti | 0.08 | 2.00 | 0.045 | 0.030 | 1.00 | 16.0-18.0 | 10.0-14.0 | 2.0-3.0 | Ti: 5(C+N)-0.70 |
| 316LN | 0.03 | 2.00 | 0.045 | 0.030 | 1.00 | 16.0-18.0 | 10.0-14.0 | 2.0-3.0 | – |
| 321 | 0.08 | 2.00 | 0.045 | 0.030 | 1.00 | 17.0-19.0 | 9.0-12.0 | – | Ti: 5(C+N)-0.70 |
| 321H | 0.04-0.10 | 2.00 | 0.045 | 0.030 | 1.00 | 17.0-19.0 | 9.0-12.0 | – | Ti: 5(C+N)-0.70 |
| 347 | 0.08 | 2.00 | 0.045 | 0.030 | 1.00 | 17.0-19.0 | 9.0-12.0 | – | Cb: 10*C-1.0 |
| 347H | 0.04-0.10 | 2.00 | 0.045 | 0.030 | 1.00 | 17.0-19.0 | 9.0-12.0 | – | Cb: 10*C-1.0 |
| 348 | 0.08 | 2.00 | 0.045 | 0.030 | 1.00 | 17.0-19.0 | 9.0-12.0 | – | Cb+Ta: 10*C-1.0, Ta: 0.10 |
| 348H | 0.04-0.10 | 2.00 | 0.045 | 0.030 | 1.00 | 17.0-19.0 | 9.0-12.0 | – | Cb+Ta: 10*C-1.0, Ta: 0.10 |
| S38815 | 0.03 | 2.00 | 0.040 | 0.020 | 5.50-6.50 | 13.0-15.0 | 15.0-17.0 | 0.75-1.50 | Al: 0.30; Cu: 0.75-1.50 |
| S31803 | 0.03 | 2.00 | 0.030 | 0.020 | 1.00 | 21.0-23.0 | 4.5-6.5 | 2.5-3.5 | – |
| S32205 | 0.03 | 2.00 | 0.030 | 0.020 | 1.00 | 22.0-23.0 | 4.5-6.5 | 3.0-3.5 | – |
| S32550 | 0.04 | 1.50 | 0.040 | 0.030 | 1.00 | 24.0-27.0 | 4.5-6.5 | 2.9-3.9 | – |
| S32750 | 0.03 | 1.20 | 0.035 | 0.020 | 0.80 | 24.0-26.0 | 6.0-8.0 | 3.0-5.0 | – |
| S32760 | 0.03 | 1.00 | 0.030 | 0.010 | 1.00 | 24.0-26.0 | 6.0-8.0 | 3.0-4.0 | – |
| S32906 | 0.03 | 1.50 | 0.030 | 0.010 | 1.00 | 27.0-30.0 | 4.5-6.5 | 3.0-5.0 | – |
| S40500 | 0.08 | 1.00 | 0.040 | 0.030 | 1.00 | 11.50-14.50 | – | – | – |
| S43000 | 0.12 | 1.00 | 0.040 | 0.030 | 1.00 | 16.00-18.00 | – | – | – |
| S43035 | 0.12 | 1.00 | 0.040 | 0.030 | 1.00 | 16.00-18.00 | – | – | – |
| S44400 | 0.025 | 1.00 | 0.040 | 0.010 | 1.00 | 18.00-20.00 | 1.75-2.50 | – | – |
| S43100 | 0.2 | 1.00 | 0.040 | 0.030 | 1.00 | 15.00-17.00 | – | – | – |
ASTM A479 Stainless Steel Bars for Boilers Mechanical Properties
| Type | Tensile Strength (ksi) | Yield Strength (ksi) | Elongation (%) |
|---|---|---|---|
| 304 | 75 | 30 | 40 |
| 304L | 70 | 25 | 40 |
| 304H | 75 | 30 | 40 |
| 304LN | 75 | 30 | 40 |
| 309S | 75 | 30 | 40 |
| 310S | 75 | 30 | 40 |
| 310H | 75 | 30 | 40 |
| 316 | 75 | 30 | 40 |
| 316L | 70 | 25 | 40 |
| 316H | 75 | 30 | 40 |
| 316Ti | 75 | 30 | 40 |
| 316LN | 75 | 30 | 40 |
| 321 | 75 | 30 | 40 |
| 321H | 75 | 30 | 40 |
| 347 | 75 | 30 | 40 |
| 347H | 75 | 30 | 40 |
| 348 | 75 | 30 | 40 |
| 348H | 75 | 30 | 40 |
| S38815 | 120 | 80 | 25 |
| S31803 | 90 | 65 | 25 |
| S32205 | 90 | 65 | 25 |
| S32550 | 110 | 80 | 15 |
| S32750 | 110 | 80 | 15 |
| S32760 | 110 | 80 | 15 |
| S32906 | 116 | 87 | 18 |
| S40500 | 60 | 35 | 20 |
| S43000 | 60 | 35 | 22 |
| S43035 | 60 | 35 | 22 |
| S44400 | 60 | 40 | 20 |
| S43100 | 100 | 75 | 15 |
Features
- ASTM A479/A479M Stainless Steel Bars and Shapes specifically for boilers and other pressure vessels, covering austenitic, duplex, ferritic, and martensitic grades.
- Excellent high-temperature strength and oxidation resistance combined with superior corrosion resistance in pressure and corrosive service.
- Available in hot-finished and cold-finished bars, plus hot-rolled or extruded shapes (rounds, squares, hexagons, angles, tees, channels) with wide dimensional range (rounds up to 12 in / 304.8 mm).
- Good weldability, machinability, and fabrication performance in annealed or heat-treated conditions.
- Hygienic, non-reactive surfaces ideal for high-purity and sanitary pressure applications.
- Full traceability with EN 10204 Type 3.1 / 3.2 certification and comprehensive testing (chemical analysis, tensile, hardness, intergranular corrosion, ultrasonic, impact).
- High-pressure and thermal stability capability tailored for boiler, heat exchanger, and pressure vessel construction.
- Custom sizes, special heat treatments, and shapes available to meet project-specific boiler and pressure vessel requirements.
Technical Specifications
| Specification | Value |
| Standard | ASTM A479/A479M Stainless Steel Bars and Shapes for Use in Boilers and Other Pressure Vessels |
| Grade | 304, 304L, 304H, 304LN, 309S, 310S, 310H, 316, 316L, 316H, 316Ti, 316LN, 321, 321H, 347, 347H, 348, 348H, S38815, S31803, S32205, S32550, S32750, S32760, S32906, S40500,S43000, S43035, S44400, S43100 |
| Delivery Condition | Normalized, Tempered, Annealed, Quenched |
| MFG. Methods | Hot-finished or cold-finished bars Hot-rolled or extruded shapes |
| Shape of Bars | Rounds, Squares, Hexagons, angles, T-Shapes, Channels |
| Density | 7.93 – 7.98g/cm³ |
| Dimension | Rounds Diameter Range: 1/8 inch (3.18 mm) to 12 inches (304.8 mm) Squares Side Length Range: 1/4 inch (6.35 mm) to 6 inches (152.4 mm) Hexagons Flat-to-Flat Range: 1/4 inch (6.35 mm) to 6 inches (152.4 mm) Angles Leg Length Range: 1/2 inch (12.7 mm) to 6 inches (152.4 mm) Thickness Range: 1/8 inch (3.18 mm) to 3/4 inch (19.05 mm) T-Shapes Leg Length Range: 1 inch (25.4 mm) to 3 inches (76.2 mm) Thickness Range: 1/8 inch (3.18 mm) to 1/2 inch (12.7 mm) Channels Flange Width Range: 3/4 inch (19.05 mm) to 3 inches (76.2 mm) Web Height Range: 1 inch (25.4 mm) to 4 inches (101.6 mm) Thickness Range: 1/8 inch (3.18 mm) to 3/8 inch (9.53 mm) |
| Inspection Certificate | EN 10204 Type 3.1 (Mill Test Certificate), EN 10204 Type 3.2 (Witness Testing or 3rd Party Inspection) |
| Tests | Chemical Analysis, Tensile Test, Hardness Test, Visual and Dimensional Inspection, Intergranular Corrosion Test, Impact Test, Ultrasonic Testing |
Applications
- Boiler and pressure vessel components including shells, heads, nozzles, and internal supports.
- Heat exchangers, reactors, and high-pressure piping systems in power generation and petrochemical plants.
- Chemical processing tanks, valves, pump shafts, and corrosion-resistant fittings.
- Oil & gas pipelines, offshore platform structures, and high-pressure wellhead components.
- Food and beverage processing equipment, storage tanks, and sanitary piping requiring pressure-rated material.
- Pharmaceutical manufacturing vessels and sterile environment hardware.
- Marine shipbuilding hull fittings, propellers, and dock equipment exposed to seawater.
- Aerospace and automotive high-performance fasteners, exhaust systems, and structural parts after proper qualification and heat treatment.
