Learn about ASTM B637 Inconel 718 round bar information
ASTM B637 is a specification covering precipitation-hardened nickel alloy round bar, including Inconel 718, suitable for high-temperature applications. Inconel 718 is a nickel-chromium-molybdenum alloy known for its exceptional strength, oxidation resistance, and ability to maintain properties at high temperatures, making it suitable for aerospace, petrochemical, and other demanding applications.
What is the composition of Inconel 718 round bar?
Inconel 718 round bar is a nickel-chromium alloy bar with a nickel content of up to 55%. It also contains 17% chromium, 4.9% niobium, and at least 6.6% iron, as well as aluminum, boron, carbon, cobalt, copper, manganese, phosphorus, lead, sulfur, and silicon.
Mechanical Strength Table Chart Alloy 718 Round Bar
| Element | Density | Melting Point | Tensile Strength | Yield Strength (0.2%Offset) | Elongation |
| 718 | 8.14 g/cm3 | 1400 °C (2550 °F) | Psi – 80,000 , MPa – 550 | Psi – 32,000 , MPa – 220 | 30 % |
Chemical Compatibility Chart of Inconel 718 Round Bar
| Grade | C | Mn | Si | Fe | S | Cr | Al | Ni | |
| 718 | min. | – | – | – | bal | – | 17.0 | 0.2 | 50.0 |
| max. | 0.08 | 0.35 | 0.35 | bal | 0.01 | 21.0 | 0.8 | 55.0 | |
Key Properties of ASTM B637 Inconel 718 Round Bar:
Mechanical Properties: It exhibits high tensile and yield strengths, good elongation, and hardness.
Temperature Range: Inconel 718 maintains its strength and properties down to temperatures as low as 1300°F (705°C) and resists oxidation up to 1800°F (980°C).
Age Hardening: This process increases its strength and creep rupture resistance.
Standards: In addition to ASTM B637, Inconel 718 round bar may also meet standards such as AMS 5596.
Applications: Due to its excellent properties, it is used in aerospace, petrochemical, energy, offshore, gas turbine components, and cryogenic storage tanks.
Corrosion Resistance: Inconel 718 offers good resistance to a variety of corrosive environments, including chloride ion stress corrosion cracking.
Gnee Steel specializes in the production and sale 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. Gnee Steel's products are widely used in aerospace, chemical, electric power, automotive, and nuclear energy applications, and we can provide customized alloy solutions tailored to customer needs. For alloy pricing inquiries or customized alloy solutions, please contact us for a quote at ss@gneesteel.com.
