UNS S32615 Round Bar
UNS S32615 Round Bar is a high silicon austenitic stainless steel long product that can be machined into corrosive resistant parts, shafts, bolting and structural components in applications in the acid and chemical processes. The bar, which is produced to either of the ASTM A276 / ASME SA-276 in hot-rolled and cold-drawn states, inherits the complete corrosion resistance of the UNS S32615 alloy system, 4.86.0% silicon and 1.52.5% copper, so it can be used in pump shafts, valve components, fasteners and machined components that need to survive immersion or exposure to concentrated acids and corrosive media in chemical plants and industrial process environments.
UNS S32615 Round Bar Specifications
| Parameter | Details |
|---|---|
| Grade | UNS S32615 |
| Product Form | UNS S32615 Round Bar |
| Standard | ASTM A276 / ASME SA-276 |
| Applicable Spec | ASTM A999, ASTM A959 |
| Max Temp (Mechanical) | 990 C |
| Max Temp (Corrosion) | 410 C |
| PREN | 21 |
| Heat Treatment | Solution Annealed 1050-1150C + Water Quench |
| Density | 7.6 g/cm3 |
| Hardness | 170 HB |
UNS S32615 Round Bar Chemical Composition
Elemental composition per ASTM A959 and UNS designation requirements:
| Element | Symbol | Min (%) | Max (%) |
|---|---|---|---|
| Carbon | C | - | 0.070 |
| Silicon | Si | 4.800 | 6.000 |
| Manganese | Mn | - | 2.000 |
| Phosphorus | P | - | 0.045 |
| Sulfur | S | - | 0.030 |
| Chromium | Cr | 16.500 | 19.500 |
| Nickel | Ni | 19.000 | 22.000 |
| Copper | Cu | 1.500 | 2.500 |
| Molybdenum | Mo | 0.300 | 1.500 |
| Iron | Fe | Balance | - |
UNS S32615 Round Bar Mechanical Properties
UNS S32615 achieves its mechanical performance through alloying and cold working. Solution annealing at 1050-1150C followed by water quenching restores optimum corrosion resistance.
| Property | Value | Unit |
|---|---|---|
| Tensile Strength (UTS) | 550 min / 620 typ | MPa |
| Yield Strength (0.2% Proof) | 220 min / 250 typ | MPa |
| Elongation at Break | 25 min / 28 typ | % |
| Reduction in Area | 46 | % |
| Brinell Hardness | 170 | HB |
| Elastic (Young's) Modulus | 190 | GPa |
| Shear Modulus | 75 | GPa |
| Poisson's Ratio | 0.28 | - |
| Fatigue Strength | 180 | MPa |
| Shear Strength | 400 | MPa |
Applications and Uses of UNS S32615 Round Bar
- Pump shafts and impeller components in acid circulation systems
- Valve stems, plugs, and trim parts in corrosive process services
- Bolts, studs, and nuts for acid-resistant flange joint assemblies
- Agitator shafts and mixer components in chemical reactors
- Machined nozzle inserts and spray bar components in pickling lines
- Electrode holders and contact bars in electrochemical processes
- Precision turned parts for analytical and laboratory chemical equipment
UNS S32615 Products
Available from USA Piping Solutions
