Q1: What is Incoloy 907 alloy, and what do N19907, ASTM B446, and AMS 5666 stand for?
A1: Incoloy 907 (UNS N19907) is a low-expansion, age-hardenable nickel‑iron‑cobalt‑niobium superalloy designed for high strength at elevated temperatures with controlled thermal expansion.
ASTM B446 is the standard specification for nickel alloy bars, wire, and forgings including Incoloy 907.
AMS 5666 is the aerospace material specification defining strict quality, chemistry, and mechanical properties for aerospace-grade Incoloy 907.
Q2: What are the key performance advantages of Incoloy 907 coil?
A2: Incoloy 907 features very low thermal expansion coefficient, excellent high‑temperature tensile and creep strength, good stability under thermal cycling, and high fatigue resistance. It maintains dimensional stability at elevated temperatures while offering superior mechanical strength compared to conventional nickel alloys.
Q3: Why is Incoloy 907 commonly supplied in coil form?
A3: Coil format is ideal for Incoloy 907 because it supports continuous production for strips, wires, springs, fasteners, and thin structural components. Coiled stock enables high‑efficiency stamping, forming, winding, and machining, which is widely required in aerospace and precision engineering.
Q4: What industries and typical applications use Incoloy 907 coil?
A4: It is widely used in aerospace and gas turbine engines, including springs, seals, fasteners, combustor components, and high-temperature structural parts. It is also used in precision instruments, gas turbines, and high-strength components requiring dimensional stability at high temperatures.
Q5: What heat treatment is required for Incoloy 907 coil to achieve full performance?
A5: Incoloy 907 relies on age hardening to develop its high strength. Typical heat treatment includes solution annealing followed by controlled precipitation hardening (aging) at around 700–800°C. This process significantly increases yield strength, hardness, and creep resistance while preserving low thermal expansion behavior.
