UNS S32615 Flanges
UNS S32615 Flanges are austenitic stainless steel flanges which are high in silicon and are designed to create corrosion resistance pipe connection systems used in acid and chemical processes. These flanges are manufactured to ASTM A182 / ASME SA-182 in weld neck, slip-on and blind, socket weld types, threaded, and lap-joint, and in ANSI/ASME pressure classes of 150 to 2500. The 4.8-6.0% silicon and 1.5-2.5% copper alloy alloy offers the same outstanding resistance to concentrated acids as the UNS S32615 product range and provides the same level of strength in the highest strength corrosive service environments.
UNS S32615 Flanges Specifications
| Parameter | Details |
|---|---|
| Grade | UNS S32615 |
| Product Form | UNS S32615 Flanges |
| Standard | ASTM A182 / ASME SA-182 |
| 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 Flanges 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 Flanges 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 Flanges
- Weld neck flanges for high-pressure acid transfer line connections
- Blind flanges for acid circuit isolation and pressure testing
- Slip-on flanges in low-pressure chemical process piping systems
- Lap-joint flanges with stub ends for easy inspection access
- Socket weld flanges on small-bore instrumentation and dosing lines
- Orifice flanges for flow measurement in acid service pipelines
- Spectacle blind and spacer flanges in corrosive line blanking
UNS S32615 Products
Available from USA Piping Solutions
