UNS S32615 Plate
UNS S32615 Plate is a high silicon austenitic stainless steel flat product that is developed to be used in structural and pressure retaining services in extremely corrosive chemical environments. It has a silicon content of 4.8-6.0% and copper additions of 1.5-2.5% and this gives it an outstanding performance against sulfuric and hydrochloric acids in both dilute and concentrated form. UNS S32615 plate which is manufactured to either the ASTM A240 / ASME SA-240 standard is highly sought after in the fabrication of pressure vessels, reaction vessel lining, acid storage tanks, and structural components in chemical process facilities where the more traditional stainless steels are easily corroded by the exfoliating gases present.
UNS S32615 Plate Specifications
| Parameter | Details |
|---|---|
| Grade | UNS S32615 |
| Product Form | UNS S32615 Plate |
| Standard | ASTM A240 / ASME SA-240 |
| 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 Plate 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 Plate 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 Plate
- Pressure vessel and reaction vessel shells in sulfuric acid service
- Cladding and liner plates for acid storage tanks and digesters
- Structural base plates in chemical plant construction
- Absorber tower internals and column trays in acid plants
- Plate heat exchanger panels in aggressive chemical media
- Flue gas desulfurization (FGD) system components
- Splash zone cladding for offshore structures and marine platforms
UNS S32615 Products
Available from USA Piping Solutions
