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.
Hastelloy nickel-molybdenum-chromium alloys deliver exceptional resistance to a broad range of severe corrosive media, including reducing and oxidizing acids, making them the preferred material for VCR fittings in the most aggressive chemical processing environments.
A nickel-molybdenum-chromium alloy with outstanding resistance to a wide variety of chemical process environments, including both oxidizing and reducing media.
| Element | Weight Percentage (%) |
|---|---|
| Nickel (Ni) | Balance |
| Chromium (Cr) | 14.5 - 16.5 |
| Molybdenum (Mo) | 15.0 - 17.0 |
| Iron (Fe) | 4.0 - 7.0 |
| Tungsten (W) | 3.0 - 4.5 |
| Cobalt (Co) | 2.5 max |
| Manganese (Mn) | 1.00 max |
| Carbon (C) | 0.01 max |
*Composition limits are as per the applicable ASTM/ASME/UNS specification; actual limits may vary depending on product form.
C276 retains good strength and ductility while offering resistance to pitting, crevice corrosion and stress corrosion cracking.
| Property | Typical / Minimum Value |
|---|---|
| Tensile Strength | 690 MPa min |
| 0.2% Yield Strength | 283 MPa min |
| Elongation | 40% min |
| Hardness | 100 HRB max |
| Density | Approx. 8.9 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.
An improved nickel-chromium-molybdenum alloy with enhanced resistance to localized corrosion compared to C276, particularly in oxidizing chloride environments.
| Element | Weight Percentage (%) |
|---|---|
| Nickel (Ni) | Balance |
| Chromium (Cr) | 20.0 - 22.5 |
| Molybdenum (Mo) | 12.5 - 14.5 |
| Iron (Fe) | 2.0 - 6.0 |
| Tungsten (W) | 2.5 - 3.5 |
| Cobalt (Co) | 2.5 max |
| Manganese (Mn) | 0.50 max |
| Carbon (C) | 0.015 max |
*Composition limits are as per the applicable ASTM/ASME/UNS specification; actual limits may vary depending on product form.
C22 offers a broader range of corrosion resistance across oxidizing and reducing conditions with good fabricability.
| Property | Typical / Minimum Value |
|---|---|
| Tensile Strength | 690 MPa min |
| 0.2% Yield Strength | 310 MPa min |
| Elongation | 45% min |
| Hardness | 100 HRB max |
| Density | Approx. 8.7 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.
A nickel-molybdenum alloy engineered for outstanding resistance to hydrochloric and other reducing acids in the absence of oxidizing agents.
| Element | Weight Percentage (%) |
|---|---|
| Nickel (Ni) | Balance |
| Molybdenum (Mo) | 26.0 - 30.0 |
| Iron (Fe) | 2.00 max |
| Chromium (Cr) | 1.00 max |
| Cobalt (Co) | 1.00 max |
| Manganese (Mn) | 1.00 max |
| Silicon (Si) | 0.10 max |
| Carbon (C) | 0.02 max |
*Composition limits are as per the applicable ASTM/ASME/UNS specification; actual limits may vary depending on product form.
B2 provides excellent resistance to pure hydrochloric and sulfuric acids at all concentrations and temperatures.
| Property | Typical / Minimum Value |
|---|---|
| Tensile Strength | 690 MPa min |
| 0.2% Yield Strength | 275 MPa min |
| Elongation | 40% min |
| Hardness | 100 HRB max |
| Density | Approx. 9.2 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.
An improved nickel-molybdenum alloy offering better thermal stability and fabricability than B2 while retaining resistance to reducing acid environments.
| Element | Weight Percentage (%) |
|---|---|
| Nickel (Ni) | Balance |
| Molybdenum (Mo) | 26.0 - 30.0 |
| Chromium (Cr) | 1.50 max |
| Iron (Fe) | 1.50 max |
| Cobalt (Co) | 3.00 max |
| Manganese (Mn) | 3.00 max |
| Aluminum (Al) | 0.50 max |
| Carbon (C) | 0.01 max |
*Composition limits are as per the applicable ASTM/ASME/UNS specification; actual limits may vary depending on product form.
B3 offers improved structural stability during welding and fabrication with excellent resistance to reducing acids.
| Property | Typical / Minimum Value |
|---|---|
| Tensile Strength | 760 MPa min |
| 0.2% Yield Strength | 350 MPa min |
| Elongation | 40% min |
| Hardness | 100 HRB max |
| Density | Approx. 9.2 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.
High-temperature, sour-service piping and wellhead systems in upstream operations.
Engine components and high-temperature piping systems demanding exceptional heat resistance.
Handles highly corrosive acids and process chemicals in demanding chemical plants.
Used in flue-gas desulfurization and high-temperature power plant piping systems.
Resists chloride attack in seawater and marine process environments.
Suited for scrubber systems and emission-control equipment exposed to acidic gases.