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.
Inconel nickel-chromium superalloys provide exceptional resistance to high temperatures, oxidation and a wide range of corrosive process environments, making them the material of choice for VCR fittings in the most demanding high-temperature and high-pressure applications.
A nickel-chromium alloy with excellent resistance to oxidation and carburization at high temperatures, along with good resistance to chloride-ion stress corrosion cracking.
| Element | Weight Percentage (%) |
|---|---|
| Nickel (Ni) | 72.0 min |
| Chromium (Cr) | 14.0 - 17.0 |
| Iron (Fe) | 6.0 - 10.0 |
| Carbon (C) | 0.15 max |
| Manganese (Mn) | 1.00 max |
| Sulfur (S) | 0.015 max |
| Silicon (Si) | 0.50 max |
| Copper (Cu) | 0.50 max |
*Composition limits are as per the applicable ASTM/ASME/UNS specification; actual limits may vary depending on product form.
Inconel 600 maintains strength and structural stability at elevated service temperatures.
| Property | Typical / Minimum Value |
|---|---|
| Tensile Strength | 550 MPa min |
| 0.2% Yield Strength | 240 MPa min |
| Elongation | 30% min |
| Hardness | 190 HB max |
| Density | Approx. 8.5 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-chromium-molybdenum alloy with niobium addition, offering exceptional strength and resistance to a wide range of corrosive environments without heat treatment.
| Element | Weight Percentage (%) |
|---|---|
| Nickel (Ni) | 58.0 min |
| Chromium (Cr) | 20.0 - 23.0 |
| Molybdenum (Mo) | 8.0 - 10.0 |
| Niobium + Tantalum | 3.15 - 4.15 |
| Iron (Fe) | 5.00 max |
| Carbon (C) | 0.10 max |
| Aluminum (Al) | 0.40 max |
| Titanium (Ti) | 0.40 max |
*Composition limits are as per the applicable ASTM/ASME/UNS specification; actual limits may vary depending on product form.
625 delivers high strength from cryogenic to elevated temperatures with excellent fatigue and corrosion resistance.
| Property | Typical / Minimum Value |
|---|---|
| Tensile Strength | 827 MPa min |
| 0.2% Yield Strength | 414 MPa min |
| Elongation | 30% min |
| Hardness | 220 HB max |
| Density | Approx. 8.4 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 precipitation-hardenable nickel-chromium alloy combining high strength, good fatigue and creep-rupture properties up to elevated temperatures.
| Element | Weight Percentage (%) |
|---|---|
| Nickel (Ni) | 50.0 - 55.0 |
| Chromium (Cr) | 17.0 - 21.0 |
| Niobium + Tantalum | 4.75 - 5.50 |
| Molybdenum (Mo) | 2.80 - 3.30 |
| Titanium (Ti) | 0.65 - 1.15 |
| Aluminum (Al) | 0.20 - 0.80 |
| Iron (Fe) | Balance |
| Carbon (C) | 0.08 max |
*Composition limits are as per the applicable ASTM/ASME/UNS specification; actual limits may vary depending on product form.
718 achieves very high strength through age hardening, making it suitable for high-stress fitting applications.
| Property | Typical / Minimum Value |
|---|---|
| Tensile Strength | 1,240 MPa min |
| 0.2% Yield Strength | 1,035 MPa min |
| Elongation | 12% min |
| Hardness | 36 HRC max |
| Density | Approx. 8.2 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 iron-nickel-chromium alloy with good strength and resistance to oxidation and carburization at high temperatures.
| Element | Weight Percentage (%) |
|---|---|
| Nickel (Ni) | 30.0 - 35.0 |
| Chromium (Cr) | 19.0 - 23.0 |
| Iron (Fe) | 39.5 min |
| Aluminum (Al) | 0.15 - 0.60 |
| Titanium (Ti) | 0.15 - 0.60 |
| Carbon (C) | 0.10 max |
| Manganese (Mn) | 1.50 max |
| Silicon (Si) | 1.00 max |
*Composition limits are as per the applicable ASTM/ASME/UNS specification; actual limits may vary depending on product form.
Inconel 800 offers good resistance to oxidation and carburizing atmospheres in high-temperature service.
| Property | Typical / Minimum Value |
|---|---|
| Tensile Strength | 520 MPa min |
| 0.2% Yield Strength | 205 MPa min |
| Elongation | 30% min |
| Hardness | 195 HB max |
| Density | Approx. 7.9 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.
A nickel-iron-chromium alloy with additions of molybdenum, copper and titanium, providing excellent resistance to both reducing and oxidizing acids.
| Element | Weight Percentage (%) |
|---|---|
| Nickel (Ni) | 38.0 - 46.0 |
| Chromium (Cr) | 19.5 - 23.5 |
| Iron (Fe) | 22.0 min |
| Molybdenum (Mo) | 2.5 - 3.5 |
| Copper (Cu) | 1.5 - 3.0 |
| Titanium (Ti) | 0.6 - 1.2 |
| Carbon (C) | 0.05 max |
| Sulfur (S) | 0.03 max |
*Composition limits are as per the applicable ASTM/ASME/UNS specification; actual limits may vary depending on product form.
825 resists sulfuric, phosphoric and nitric acid environments while retaining good weldability.
| Property | Typical / Minimum Value |
|---|---|
| Tensile Strength | 586 MPa min |
| 0.2% Yield Strength | 241 MPa min |
| Elongation | 30% min |
| Hardness | 200 HB max |
| Density | Approx. 8.1 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.