Pipe-Lok Vales & Fittings Company delivers precision-engineered instrumentation fittings and valves trusted for reliability, safety, and performance in industrial applications with a strong focus on engineering excellence and quality control.
SS 304 and its low-carbon variant 304L are the most widely used austenitic stainless steels, offering good general corrosion resistance, formability and weldability for VCR metal gasket face-seal fittings in general process, instrumentation and utility service.
Standard austenitic stainless steel with balanced chromium-nickel content, suitable for general corrosion resistance and good weldability.
| Element | Weight Percentage (%) |
|---|---|
| Carbon (C) | 0.08 max |
| Chromium (Cr) | 18.0 - 20.0 |
| Nickel (Ni) | 8.0 - 10.5 |
| Manganese (Mn) | 2.00 max |
| Silicon (Si) | 1.00 max |
| Phosphorus (P) | 0.045 max |
| Sulfur (S) | 0.030 max |
| Iron (Fe) | Balance |
*Composition limits are as per the applicable ASTM/ASME/UNS specification; actual limits may vary depending on product form.
Type 304 offers a good combination of strength and ductility for fittings in moderately corrosive environments.
| Property | Typical / Minimum Value |
|---|---|
| Tensile Strength | 515 MPa min |
| 0.2% Yield Strength | 205 MPa min |
| Elongation | 40% min |
| Hardness | 201 HB max |
| Density | Approx. 8.0 g/cm³ |
*Mechanical requirements depend on product form, heat treatment and applicable ASTM/ASME specification. Confirm final values against the material specification used for the VCR fitting component.
Low-carbon version of 304, minimizing carbide precipitation during welding for improved intergranular corrosion resistance.
| Element | Weight Percentage (%) |
|---|---|
| Carbon (C) | 0.030 max |
| Chromium (Cr) | 18.0 - 20.0 |
| Nickel (Ni) | 8.0 - 12.0 |
| Manganese (Mn) | 2.00 max |
| Silicon (Si) | 1.00 max |
| Phosphorus (P) | 0.045 max |
| Sulfur (S) | 0.030 max |
| Iron (Fe) | Balance |
*Composition limits are as per the applicable ASTM/ASME/UNS specification; actual limits may vary depending on product form.
304L retains good strength with enhanced resistance to sensitization, making it preferred for welded fitting components.
| Property | Typical / Minimum Value |
|---|---|
| Tensile Strength | 485 MPa min |
| 0.2% Yield Strength | 170 MPa min |
| Elongation | 40% min |
| Hardness | 201 HB max |
| Density | Approx. 8.0 g/cm³ |
*Mechanical requirements depend on product form, heat treatment and applicable ASTM/ASME specification. Confirm final values against the material specification used for the VCR fitting component.
High-performance material specifications for our complete VCR Fittings range.
Engineered for demanding fluid and gas-handling systems where leak-tight sealing, corrosion resistance and long service life are essential.
Used in process piping and instrumentation systems handling corrosive fluids across chemical plants.
Hygienic-grade connections for food, dairy and beverage processing lines requiring cleanability.
Suited for high-purity process lines where contamination control and corrosion resistance are critical.
Reliable performance in upstream and downstream piping systems exposed to varying process media.
Corrosion-resistant fittings for shipboard piping and offshore support systems.
Withstands bleaching and pulping process chemicals in paper manufacturing plants.