Gnee Steel offers high-quality Inconel 718 round bars with lengths ranging from 100 mm to 3000 mm. These round bars are renowned for their exceptional mechanical properties and resistance to extreme environments, making them ideal for various applications in aerospace, oil and gas, and chemical industries. Inconel 718 round bars are available in a variety of diameters and comply with stringent industry standards. For detailed specifications, including chemical composition and mechanical properties, please refer to our product catalog or contact Gnee Steel directly.
Gnee Steel is a leading stockist, trader, dealer, and distributor of Inconel 718 round bars in China. This product is widely used in medical implants, chemical industries, and other fields, and is exported to numerous countries including Qatar, Dubai, Oman, Lebanon, Turkey, and Malaysia.
Detailed Explanation of the Properties of 718 Alloy Rods
Detailed Explanation of the Properties of 718 Alloy Rods
718 alloy bar (Inconel 718) is a high-strength, corrosion-resistant nickel-chromium-based superalloy, ideally suited for extreme environments ranging from cryogenic temperatures to 1300°F (704°C). It exhibits excellent yield strength, tensile strength, and creep rupture strength, as well as outstanding weldability and resistance to stress corrosion cracking. Primary applications include aerospace turbine components, rocket engines, and downhole oil and gas equipment.
What are the characteristics of Nickel Alloy 718?
Alloy 718 is a precipitation-hardening nickel-based alloy designed to exhibit extremely high yield strength, tensile strength, and creep rupture properties at temperatures up to 1300°F. The slow age-hardening response of Alloy 718 allows for annealing and welding during heating and cooling processes without spontaneous hardening.
inconel Alloy 718 Bar chemical composition (ASTM B637-18 UNS N07718)
| Chemical Element | % Present |
|---|---|
| Nickel (Ni) | 50.00 - 55.00 |
| Chromium (Cr) | 17.00 - 21.00 |
| Molybdenum (Mo) | 2.80 - 3.30 |
| Copper (Cu) | 0.00 - 0.30 |
| Aluminium (Al) | 0.20 - 0.80 |
| Boron (B) | 0.00 - 0.01 |
| Carbon (C) | 0.00 - 0.08 |
| Cobalt (Co) | 0.00 - 1.00 |
| Manganese (Mn) | 0.00 - 0.35 |
| Phosphorous (P) | 0.00 - 0.02 |
| Sulphur (S) | 0.00 - 0.02 |
| Titanium (Ti) | 0.65 - 1.15 |
| Silicon (Si) | 0.00 - 0.35 |
| Iron (Fe) | Balance |
Mechanical Properties of 718 Rod & Bar - Solution Annealed & Hardened (ASTM B637-18 UNS N07718)
| Mechanical Property | Value |
|---|---|
| Proof Stress | 1034 Min MPa |
| Tensile Strength | 1275 Min MPa |
| Elongation A50 mm | 12 Min % |
| Hardness Brinell | 331 Min HB |
| Hardness Rockwell C | 36 Min HRC |
General Physical Properties
| Physical Property | Value |
|---|---|
| Density | 8.26 g/cm³ |
| Melting Point | 1270-1340 °C |
| Thermal Expansion | 14.1×10−614.1×10−6 /K |
| Modulus of Elasticity | 203 GPa |
| Thermal Conductivity | 11.1 W/m.K |
Additional Information
Heat Treatment
The following heat treatment should be used to obtain the best combination of tensile properties and stress rupture properties:
1 hr 1750°F to 1800°F (954 to 982°C) air cool + 8hr 1325°F (718°C) cool 100°F /hr to 1150°F (56 °C/hr to 621°C), hold 8 hrs and air cool.
To obtain the best room temperature and cryogenic tensile properties, the following heat treatment should be used:
1 to 2 hr 1950°F (1066°C), air cool + 8 hr 1325°F (718°C) cool 100°F/hr to 1150°F (56°C/hr to 621°C), hold 8 hr and air cool.
Alloy 718 Round Bar Processing Properties
Hot Working: Hot working is performed at a maximum furnace temperature of 2050°F (1121°C). If the service temperature is below approximately 1100°F (593°C), hot-cold working in the temperature range of 1700/1850°F (927/1010°C) can improve the strength of the forgings. Prolonged holding at forging temperatures should be avoided. The material should be uniformly deformed to avoid the formation of a duplex grain structure.
Machining: This alloy is readily machinable in both the annealed and age-hardened conditions. Chip breakage is better and surface finish is improved in the age-hardened condition. Tool life is slightly longer in the annealed condition.
Welding: Alloy 718 can be welded in either the annealed or age-hardened condition. Welding in the age-hardened condition will result in the formation of a softened heat-affected zone.
Inconel 718 Alloy Rod Corrosion Resistance
The 718 alloy rod exhibits excellent corrosion resistance in a variety of environments, including seawater, H₂S, CO₂, elemental sulfur, and chloride ions, and performs well at different temperatures. It is resistant to sulfide stress cracking and passes sulfide stress corrosion tests conforming to NACE TM 0177 Method C Solution A standards.
Typical Results:
Critical pitting temperature: 0-5℃ (32-41℉) ASTM G48 Method C
Crevice corrosion temperature: 40-45℃ (104-113℉) ASTM G48 Method D
Gnee Steel is a professional manufacturer of various nickel-based alloys, including Nickel 201, Nickel 202, Hastelloy C-276, Hastelloy C-22, Hastelloy B, Hastelloy C-4, Inconel Alloy 600, Inconel 625, Inconel 718, Inconel X-750, Incoloy Alloy 800, Incoloy 800H/HT, Incoloy 825, Monel Alloy 400, Monel K500, and high-temperature alloys. We specialize in the production and sales of alloy materials. Gnee Steel's products are widely used in aerospace, chemical, power, automotive, and nuclear energy industries, and we can provide customized alloy material solutions according to customer needs. For alloy material price inquiries or to request customized alloy material solutions, please feel free to contact us at ru@gneesteelgroup.com for a quote.