ASTM F1466-20 PDF

Full title and description

ASTM F1466-20 — Standard Specification for Iron‑Nickel‑Cobalt Alloys for Metal‑to‑Ceramic Sealing Applications. This specification defines materials, forms, and property requirements for two iron‑nickel‑cobalt sealing alloys used primarily for brazed metal‑to‑ceramic seals (alumina ceramics) in vacuum electronic and related applications.

Abstract

This specification covers two specific alloys (UNS K94630 and UNS K94620), their nominal chemical compositions, and the required material and mechanical properties when supplied as wire, rod, bar, strip, sheet, or tubing for metal‑to‑ceramic sealing. Requirements include chemical composition limits, temper and surface finish, grain size, tensile properties and hardness, inclusion/content limits, thermal expansion characteristics, and dimensional tolerances appropriate for brazed seals to alumina ceramics.

General information

• Status: Withdrawn (no replacement indicated) — withdrawn by ASTM in 2024.
• Publication date: Approved Sept 1, 2020; published September 2020 (designation F1466‑20).
• Publisher: ASTM International (original publisher and maintenance body).
• ICS / categories: 77 (Metallurgy) — relevant subgroups include testing and classification of metals and alloys (for example 77.040 Testing of metals / 77.080 Ferrous metals).
• Edition / version: F1466‑20 (2020 edition).
• Number of pages: 6 pages (standard document length as published).

Scope

The standard applies to two iron‑nickel‑cobalt alloys in defined nominal compositions (UNS K94630 — ~29% Ni, 17% Co, 53% Fe; UNS K94620 — ~27% Ni, 25% Co, 48% Fe) supplied in wire, rod, bar, strip, sheet, and tubing. It sets chemical, mechanical, metallurgical, dimensional, and surface requirements so the materials are suitable for brazing to alumina ceramics for vacuum electronic and similar metal‑to‑ceramic sealing applications. The specification also lists referenced test methods and ordering information (temper, surface finish, certification, packaging).

Key topics and requirements

• Defined nominal chemical compositions for UNS K94630 and UNS K94620 (nickel, cobalt, iron balances and limits).
• Acceptable product forms: wire, rod, bar, strip, sheet, and tubing for sealing applications.
• Material property criteria: tensile strength, hardness ranges, and grain‑size requirements where applicable.
• Surface condition and finish requirements relevant to brazing and hermetic metal‑to‑ceramic sealing.
• Limits on non‑metallic inclusions and manufacturing defects that could affect sealing performance.
• Thermal expansion / transformation characteristics to ensure compatibility with alumina ceramic seals.
• Ordering information: alloy (UNS number), size, temper designation, surface finish, marking/packaging, and certification/traceability requirements.

Typical use and users

Typical users include materials engineers, vacuum electronics manufacturers, component suppliers, brazing shops, quality and inspection laboratories, and procurement/specification engineers who select or verify alloys for metal‑to‑ceramic hermetic seals (especially seals to alumina ceramics). The specification is used to specify incoming material requirements, acceptance testing, and manufacturing procurement for seal‑grade alloys.

Related standards

Related ASTM standards and referenced test methods often cited in conjunction with sealing alloys include ASTM F30 (iron‑nickel sealing alloys), various chemical and mechanical test methods (ASTM E3, E8, E18, E1019, etc.), and other sealing‑alloy specifications used for glass‑to‑metal or ceramic‑to‑metal applications. Users should check the standard’s referenced documents section for the exact list of test methods and cross‑references.

Keywords

iron‑nickel‑cobalt, sealing alloys, metal‑to‑ceramic, brazing, UNS K94630, UNS K94620, alumina, vacuum electronics, hermetic seal, thermal expansion, alloy specification.

FAQ

Q: What is this standard?

A: ASTM F1466‑20 is a material specification that defined two iron‑nickel‑cobalt alloys and the property, chemical, and supply requirements for those alloys when used for brazed metal‑to‑ceramic (alumina) seals.

Q: What does it cover?

A: It covers nominal chemical composition, acceptable product forms (wire, rod, bar, strip, sheet, tubing), mechanical properties (tensile/hardness), microstructural requirements, surface finish, thermal expansion considerations, inclusion limits, dimensional tolerances, test methods, and ordering information for the two specified alloys.

Q: Who typically uses it?

A: Materials and design engineers, manufacturers of vacuum electronic components, brazing shops, procurement/specification personnel, and QA/test labs that verify sealing‑alloy materials for metal‑to‑ceramic hermetic seals.

Q: Is it current or superseded?

A: The F1466‑20 edition was published in 2020 but was marked withdrawn by ASTM in 2024; the ASTM record indicates it was withdrawn with no replacement listed. Users should confirm current requirements or alternative specifications before procurement or testing.

Q: Is it part of a series?

A: It sits within the ASTM F01 committee’s electronics/metallurgy portfolio of sealing‑alloy and metallization specifications (related documents include other sealing alloy specifications and the test methods referenced within F1466). It is related in purpose to earlier sealing alloy standards such as F30 and F31 and to the test methods (ASTM E and related series) used to verify composition and mechanical properties.

Q: What are the key keywords?

A: iron‑nickel‑cobalt, metal‑to‑ceramic sealing, UNS K94630, UNS K94620, brazing, alumina, hermetic seal, sealing alloy, vacuum electronics.