What is ASTM A276 UN S31803 SS round bar?
Sep 09, 2025
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What material is ASTM A276?
ASTM A276 is a standard specification for stainless steel bars and shapes. It covers both hot-finished and cold-finished bars and shapes made from various stainless steel grades, including common types like 202, 304, 316, 410, and 440. The specification defines the material's composition and mechanical property requirements and is used for applications requiring a range of shapes like rounds, squares, hexagons, angles, tees, and channels.
What is ASTM A276 UN S31803 SS round bar?
ASTM A276 S31803 is the specification for duplex stainless steel bar, specifically UNS S31803, also known as Duplex 2205. This ferritic-austenitic stainless steel offers high strength and excellent corrosion resistance. It is available in round, square, hexagonal, and other hot-rolled and extruded shapes. It is suitable for a variety of demanding industrial applications, including those in the chemical, oil, and gas industries.
UNS S31803 Duplex Steel Rods Chemical Composition
|
Identification Symbol |
UNS Number |
Grade |
Elements |
Composition % |
|---|---|---|---|---|
|
2205
|
S31803
|
21 chromium, 26 nickel, 4.5 molybdenum
|
Carbon |
0.02 max |
|
Manganese |
2.00 max |
|||
|
Phosphorus |
0.045 max |
|||
|
Sulfur |
0.035 max |
|||
|
Silicon |
1.00 max |
|||
|
Nickel |
23.00 - 28.00 |
|||
|
Chromium |
19.00 - 23.00 |
|||
|
Molybdenum |
4.00 - 5.00 |
|||
|
Copper |
1.00 - 2.00 |
|||
|
Nitrogen |
0.10 max |
Duplex Steel WERKSTOFF NR. 1.4462 Rods Mechanical Properties
| Grades | Density (g/cm 3) | Density (lb/in 3) | Melting Point (°C) | Melting Point (°F) |
| S31803 | 7.805 | 0.285 | 1420 – 1465 | 2588 – 2669 |
Price List of Duplex Steel S31803 Rods
Price of Duplex Steel Rods ASTM A276 S31803 : FOB Price: US $1-10 / Kilogram
Price of Duplex Steel ASME SA276 S31803 Rods : FOB Price: US $1-10 / Kilogram
ASTM A276 S31803 Rods vs. ASTM A479 S31803 Rods
The main difference is ASTM A276 covers stainless steel bars and shapes for general-purpose use, while ASTM A479 is a standard for heat-treated stainless steel bars and shapes specifically for boilers and other pressure vessels. While both standards cover S31803 duplex stainless steel, A479 requires additional heat treatment and testing to meet the stringent demands of pressure vessel applications, providing enhanced strength, corrosion resistance, and safety under elevated pressure and temperature conditions.
GNEE Stainless Steel is a manufacturer, supplier, and exporter of a wide range of high-quality products. We are also a leading supplier of a wide range of stainless steel and UNS S31803 duplex steel bars. UNS S31803 stainless steel bars come in various shapes such as square, rectangular, forged, hexagonal, and round. These bars are suitable for various industries such as the chemical industry, seawater equipment, pulp and paper mills, condensers, heat exchangers, power generation, gas processing, petrochemicals, pharmaceuticals, and many more.
S31803 Duplex Steel Rods Specification :
| Specifications | : | ASTM A 276 / SA 276 |
| Dimensions | : | ASTM, ASME |
| Range | : | 3.17 MM TO 350 MM DIA |
| Length | : | 1 to 6 Meters, Custom Cut Lengths |
| Finish | : | Bright, Polish & Black |
| Condition | : | Cold Drawn & Polished Cold Drawn, Centreless Ground & Polished |
| Form | : | Round, Square, Hex (A/F), Rectangle, Wire (Coil Form), Wire-mesh, Billet, Ingot, Forging Etc. |
| Type | : | ASTM A 276 Duplex Steel S31803 Rod |
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