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Inconel 718 and 825 Rod and Wire are high-performance nickel-based alloys known for their exceptional strength, corrosion resistance, and heat tolerance. Inconel 718 is a precipitation-hardenable alloy designed for high strength and fatigue resistance, while Inconel 825 provides superior corrosion resistance in chemical and marine environments. Both alloys are widely used in aerospace, oil & gas, and chemical processing industries. Inconel 718/825 Rod Wire maintain mechanical stability even under extreme temperatures and pressures. Their durability ensures long service life in harsh industrial conditions.
One of the main advantages of Inconel 718/825 Rod Wire is their outstanding resistance to oxidation and corrosion in both oxidizing and reducing environments. Inconel 718 excels in high-temperature mechanical applications, while Inconel 825 performs exceptionally in acidic and seawater conditions. These alloys provide superior protection against pitting, crevice corrosion, and stress corrosion cracking. Inconel 718/825 Rod Wire retain their toughness and ductility even after long exposure to high heat. This combination of strength and resistance makes them ideal for critical engineering components.
Inconel 718 Rod Wire is primarily valued for its excellent tensile, creep, and rupture strength up to 1300°F (700°C). It is widely used in gas turbines, jet engines, and rocket motors due to its ability to maintain integrity under extreme stress. In contrast, Inconel 825 Rod Wire is designed for chemical and marine industries, where it resists sulfuric and phosphoric acid corrosion. The alloy’s nickel, iron, and chromium composition offers exceptional stability in corrosive environments. Together, these alloys provide versatility for diverse high-performance applications.
The fabrication of Inconel 718/825 Rod Wire requires precision due to their work-hardening nature. They can be machined, welded, and formed using proper techniques and tools. Inconel 718 is age-hardened through controlled heat treatment, enhancing its strength without reducing toughness. Inconel 825 Rod Wire is easily welded and shaped while maintaining excellent corrosion resistance. These properties allow both alloys to be customized for specific operational requirements. Their adaptability ensures reliability across various industrial applications.
Inconel 718/825 Rod Wire are highly resistant to chloride-ion stress corrosion cracking and intergranular attack. This makes them suitable for use in chemical plants, oil refineries, and offshore platforms. Inconel 825’s molybdenum and copper content enhances resistance to reducing acids, while titanium stabilizes the alloy structure. Inconel 718 provides exceptional fatigue and creep resistance, making it indispensable in aerospace and turbine engineering. These rods and wires deliver consistent performance under both mechanical and chemical stress.
Both Inconel 718 and 825 Rod Wire are available in a variety of sizes, diameters, and finishes to meet industrial standards. They are often used for fasteners, shafts, springs, and heat exchanger components. Inconel 718/825 Rod Wire maintain high stability during prolonged service at elevated temperatures. Their superior surface finish and dimensional accuracy enhance performance efficiency in critical applications. These alloys represent a perfect blend of mechanical strength and corrosion resistance for demanding environments.
In conclusion, Inconel 718/825 Rod and Wire offer an unmatched combination of strength, corrosion resistance, and thermal stability. Their performance in aggressive environments makes them essential in aerospace, marine, and chemical processing industries. Inconel 718/825 Rod Wire ensure long-lasting durability with minimal maintenance requirements. Their excellent metallurgical properties support precision manufacturing and high-load applications. Overall, these alloys provide a reliable and efficient solution for modern engineering challenges.
Specification Table
| Alloy Grade | Standard | Rod / Bar Specification | Wire Specification | Diameter Range | Condition | Finish |
|---|---|---|---|---|---|---|
| Inconel 718 | ASTM B637 / AMS 5662 / AMS 5663 | ASTM B637, ASME SB637 | ASTM B637, AMS 5663 | 0.5 mm – 200 mm | Solution Annealed / Aged / Cold Drawn | Bright, Black, Polished, Pickled |
| Inconel 825 | ASTM B425 / ASME SB425 / UNS N08825 | ASTM B425, ASME SB425 | ASTM B425, ASME SB425 | 0.5 mm – 150 mm | Annealed / Cold Drawn | Bright, Black, Polished, Pickled |
Chemical Composition (Typical ranges for SS718/825)
Note: Values are typical ranges. Final composition will be confirmed on MTC provided per lot.
| Element | Inconel 718 (%) | Inconel 825 (%) |
|---|---|---|
| Nickel (Ni) | 50.0 – 55.0 | 38.0 – 46.0 |
| Chromium (Cr) | 17.0 – 21.0 | 19.5 – 23.5 |
| Iron (Fe) | Balance | 22.0 – 38.0 |
| Molybdenum (Mo) | 2.8 – 3.3 | 2.5 – 3.5 |
| Niobium + Tantalum (Nb + Ta) | 4.75 – 5.50 | — |
| Titanium (Ti) | 0.65 – 1.15 | 0.6 – 1.2 |
| Aluminum (Al) | 0.20 – 0.80 | 0.2 – 0.4 |
| Copper (Cu) | ≤ 0.30 | 1.5 – 3.0 |
| Carbon (C) | ≤ 0.08 | ≤ 0.05 |
| Manganese (Mn) | ≤ 0.35 | ≤ 1.0 |
| Silicon (Si) | ≤ 0.35 | ≤ 0.5 |
| Phosphorus (P) | ≤ 0.015 | ≤ 0.02 |
| Sulfur (S) | ≤ 0.015 | ≤ 0.03 |
Mechanical Properties (Typical)
| Property | Inconel 718 | Inconel 825 | Test Condition |
|---|---|---|---|
| Tensile Strength (MPa) | ≥ 1240 | ≥ 550 | Room Temperature |
| Yield Strength (0.2% Proof, MPa) | ≥ 1035 | ≥ 220 | Room Temperature |
| Elongation (%) | ≥ 12 | ≥ 30 | Room Temperature |
| Hardness (Brinell HB) | ≤ 363 | Approx. 200 | Annealed |
| Density (g/cm³) | 8.19 | 8.14 | — |
| Melting Point (°C) | 1260 – 1336 | 1350 – 1400 | — |
| Operating Temperature Range (°C) | -253 to +700 | -100 to +540 | — |
Equivalent 718/825s
| Alloy | UNS | Werkstoff Nr. | EN | BS | AFNOR | JIS |
|---|---|---|---|---|---|---|
| Inconel 718 | UNS N07718 | 2.4668 | NiCr19Fe19Nb5Mo3 | NA 51 | NC19FeNb | NCF 718 |
| Inconel 825 | UNS N08825 | 2.4858 | NiFe30Cr21Mo3 | NA 16 | NC21FeMo | NCF 825 |
Dimension & Weight Chart (Selected common sizes)
Below is a representative chart showing outside diameter, wall thickness, inside diameter, cross-sectional area of metal and calculated weight per metre (kg/m). Values are calculated using density = 7.93 g/cm³ and are for guidance — use actual MTC values for procurement & engineering.
| Diameter (mm) | Cross-Sectional Area (mm²) | Approx. Weight (kg/m) | Approx. Weight (kg/ft) |
|---|---|---|---|
| 1.0 | 0.785 | 0.0064 | 0.0019 |
| 2.0 | 3.142 | 0.0257 | 0.0078 |
| 3.0 | 7.069 | 0.0578 | 0.0176 |
| 5.0 | 19.635 | 0.1606 | 0.0490 |
| 8.0 | 50.265 | 0.4108 | 0.1253 |
| 10.0 | 78.540 | 0.6417 | 0.1957 |
| 12.0 | 113.097 | 0.9230 | 0.2812 |
| 16.0 | 201.062 | 1.6400 | 0.4998 |
| 20.0 | 314.159 | 2.5600 | 0.7800 |
| 25.0 | 490.874 | 4.0000 | 1.2190 |
| 30.0 | 706.858 | 5.7600 | 1.7540 |
| 40.0 | 1256.637 | 10.240 | 3.120 |
| 50.0 | 1963.495 | 16.000 | 4.877 |
Types Of Inconel 718/825 Rod Wires and Tubes
Stainless Steel rod Wire
Monel 400 Rod Wire
Hastelloy Rod Wire
Inconel 600 Rod Wire
Nickel Rod Wire
Super Duplex Rod Wire
Duplex Rod Wire
Monel K500 Rod Wire
Frequently Asked Questions (FAQ)
What is Inconel 718 and Inconel 825 Rod & Wire?
Inconel 718 and 825 Rod & Wire are high-performance nickel-based alloys known for excellent strength, corrosion resistance, and heat resistance. Inconel 718 is precipitation-hardenable and ideal for aerospace and turbine components, while Inconel 825 offers superior resistance to acids and is used in chemical and marine industries.
What are the key differences between Inconel 718 and Inconel 825?
Inconel 718 provides exceptional high-temperature strength and oxidation resistance due to its niobium and molybdenum content, making it suitable for aerospace and gas turbines. In contrast, Inconel 825 is optimized for corrosion resistance in acidic and chloride-rich environments, ideal for chemical processing and marine applications.
What are the standard specifications for Inconel 718 and 825 Rod & Wire?
Inconel 718 Rod & Wire conform to ASTM B637 and AMS 5662/5663 specifications, while Inconel 825 Rod & Wire conform to ASTM B425 and ASME SB425 standards. Both are available in annealed, solution-treated, and cold-drawn conditions.
What are common applications of Inconel 718/825 Rod & Wire?
Typical applications include turbine components, heat exchangers, marine hardware, chemical processing equipment, nuclear fuel elements, and oil & gas tools. Their high resistance to oxidation and corrosion ensures long service life in extreme conditions.
What size range is available for Inconel 718 and 825 Rod & Wire?
Both alloys are available in diameters ranging from 0.5 mm to 200 mm for rods and wires. Custom sizes, lengths, and surface finishes (bright, black, polished, pickled) are available upon request.
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