ASTM B637 Inconel 718 Round Bar

ASTM B637 Inconel 718 Round Bar Property Information
ASTM B637 Inconel 718 round bar is renowned for its high strength, excellent corrosion resistance, and good weldability, making it suitable for a variety of high-temperature and high-stress applications. Its key properties include tensile strength of approximately 1035-1200 MPa, yield strength of approximately 930-1080 MPa, and elongation of approximately 20-30%. It also exhibits good creep rupture strength, especially at temperatures up to 700°C.
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 Characteristics Of Inconel Alloy 718 bar
| Elongation | Density | Tensile Strength | Melting Point | Yield Strength (0.2%Offset) |
| 45 % | 8.2 g/cm3 | Psi – 1,35,000 , MPa – 930 | 1350 °C (2460 °F) | Psi – 75,000 , MPa – 482 |
Chemical Composition Of Alloy 718 Bar
| Grade | Cr | Mn | C | Cu | Si | S | Mo | Fe | Ni |
| Inconel 718 | 17 – 21 | 0.35 max | 0.08 max | 0.30 max | 0.35 max | 0.15 min | – | – | 50 – 55 |
UNS N07718 Round Bar Size Chart
| Size of Alloy 718 round bar | |||||||
|---|---|---|---|---|---|---|---|
| Metric | US Bar | ASTM/ Canadian | Japanese | ||||
| Diameter(mm) | Bar Size | Diameter (Inch) | Bar Size | Diameter (mm2) | Bar Size | Diam. (mm) | Bar Size |
| 6 | 6 | 0.500 | #4 | 300 | 20M | 13 | 13 |
| 5.5 | 5.5 | 0.375 | #3 | 200 | 15M | 10 | 10 |
| 8 | 8 | 0.750 | #6 | 700 | 30M | 19 | 19 |
| 9 | 9 | 0.875 | #7 | 1000 | 35M | 22 | 22 |
| 7 | 7 | 0.625 | #5 | 500 | 25M | 16 | 16 |
| 11 | 11 | 1.125 | #9 | 2500 | 55M | 29 | 29 |
| 5 | 5 | 0.250 | #2 | 100 | 10M | 6 | 6 |
| 10 | 10 | 1.000 | #8 | 1500 | 45M | 25 | 25 |
| 14 | 14 | 1.375 | #11 | 35 | 35 | ||
| 32 | 32 | ||||||
| 12 | 12 | 1.250 | #10 | 32 | 32 | ||
| 20 | 20 | 1.750 | #14 | 44 | 44 | ||
| 22 | 22 | 1.875 | #15 | 48 | 48 | ||
| 16 | 16 | 1.500 | #12 | 38 | 38 | ||
| 18 | 18 | 1.625 | #13 | 41 | 41 | ||
| 28 | 28 | 2.250 | #18 | 57 | 57 | ||
| 50 | 50 | ||||||
| 25 | 25 | 2.000 | #16 | 51 | 51 | ||
| 40 | 40 | ||||||
| 36 | 36 | ||||||
| 44 | 44 | ||||||

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@gneemetal.com.





