ASTM B670 Inconel 718 sheet supplier, contact us to get free quote and sample!
Inconel 718 is a nickel-chromium-based alloy that is commonly used in high-temperature applications such as aerospace and gas turbines. One of the most important factors in the production of ASTM B670 Inconel 718 Sheet is the plate rolling process. There are two main types of alloy 718 plates available on the market: hot rolled and cold rolled plates.
Hot Rolled Inconel 718 (ASTM B670 Plate)
Hot rolling takes place at extreme temperatures, typically above 1700°F (925°C). The nickel-alloy ingot is passed through heavy rolling mills while hot, allowing large thickness reductions in a single pass without causing internal work hardening.
Form Supply: Generally supplied as heavy plates (thicknesses greater than 3/16" or 4.76mm).
Surface Finish: Features a darker, slightly textured matte finish. It is typically descaled (pickled) or solution-annealed prior to final delivery.
Cold Rolled Inconel 718 (ASTM B670 Sheet & Strip)
Cold rolling takes place at room temperature following initial hot rolling and pickling. The material is compressed between rollers to achieve precise thicknesses, which introduces intentional strain hardening (work hardening) that boosts yield strength before final heat treatment.
Form Supply: Generally supplied as thin sheets and high-precision strips (thicknesses less than 3/16").
Surface Finish: Features a smooth, bright, and reflective surface finish with exceptional dimensional uniformity.
Hot Rolled vs. Cold Rolled Comparison
Choosing the right material condition ensures your components perform reliably while minimizing scrap loss during production machining.
| Technical Parameter | Hot Rolled (ASTM B670 Plate) | Cold Rolled (ASTM B670 Sheet/Strip) |
| Common Thickness Range | 4.76 mm to over 50 mm (3/16" and up) | 0.3 mm to 4.0 mm (Thin gauge) |
| Dimensional Tolerance | Standard commercial tolerances; slight variations due to thermal cooling contraction | Tight, high-precision tolerances ideal for automated stamping/forming |
| Surface Profile | Matte, slightly rough, descaled finish | Bright, smooth, reflective or polished finish |
| Grain Structure | Uniform, equiaxed recrystallized grains | Elongated grain structure providing higher directional tensile properties before aging |
| Typical Applications | Structural turbine casings, heavy flanges, rings, and pressure vessel walls | Aircraft engine components, diaphragms, expansion joints, and high-strength springs |
Mechanical Properties & Compliance Standards
Regardless of whether the material is hot or cold rolled, premium UNS N07718 flat products must meet or exceed the rigorous mechanical baselines established by ASTM B670 after full precipitation hardening (aging).
Key Precipitation-Hardened Mechanical Requirements (ASTM B670):
Tensile Strength: ≥ 180 ksi (1241 MPa)
Yield Strength (0.2% Offset): ≥ 150 ksi (1034 MPa)
Elongation in 2 inches: ≥ 12%
Procurement Alignment Note: While ASTM B670 governs flat-rolled plates and sheets, matching structural frameworks often demand round bars or forged bars. To guarantee seamless engineering compatibility across your assembly, verify that your bar components align precisely with the AMS 5663 standard for Inconel 718 round bars.
Why Source ASTM B670 Inconel 718 from HT PIPE?
Zhengzhou Huitong Pipeline Equipment Co., Ltd. (HT PIPE) streamlines your industrial procurement by providing complete, mill-certified nickel alloy supply solutions:
Precision Processing & Custom Cutting: We do not just supply raw mill sheets and plates. We offer in-house waterjet cutting, laser cutting, and plasma profiling to deliver ready-to-weld shapes directly to your fabrication facility, minimizing material waste.
Complete Package Capabilities: Save on logistics coordination overhead. We supply matching seamless pipes, high-pressure forged fittings, and heavy flanges alongside our ASTM B670 plates.
Rigorous Quality Assurance: All Inconel 718 shipments are backed by complete EN 10204 3.1 Mill Test Certificates (MTC), verifiable Positive Material Identification (PMI) testing, and strict ultrasonic thickness inspections.
Looking for pricing or custom dimensions?
Submit your material specifications and size requirements directly to our engineering sales team at market@htpipe.com. We deliver comprehensive B2B quote packages within 24 hours.
