GOST 26364-90 PDF

Full title and description

GOST 26364-90 — "Ferritometers for austenitic steels. General specifications." This national (interstate) standard sets general technical requirements, types, measurement ranges, performance and metrological characteristics, acceptance and test methods, calibration and marking for portable magnetic ferritometers intended to measure ferrite content in austenitic stainless steels (castings, welds, overlays and base metal).

Abstract

This standard specifies types of ferritometers (volume and local), main parameters and permissible measurement ranges; requirements for power supply, working frequencies and mass limits; procedures for acceptance, calibration (graduation) and periodic verification; test methods, storage and transport conditions and manufacturer guarantees for portable ferritometers used in corrosion‑resistant chromium‑nickel austenitic steels.

General information

• Status: Active / in force (listed as the valid interstate standard replacing ГОСТ 26364‑84).
• Publication date: Introduced 01 January 1992 (approved 10 October 1990; published by the Standards Publishing House in 1991 and put into effect 01.01.1992).
• Publisher: Издательство стандартов (Standards Publishing / national standards publisher).
• ICS / categories: Non‑destructive testing / metallurgical testing (classification related to tests of metals and magnetic/electrical measurements; commonly associated with ICS 77.040.20 and stainless‑steel testing classifications).
• Edition / version: Designation GOST 26364‑90 (original approval 1990; entry into force 1992).
• Number of pages: 11 pages (standard text length).

Scope

Applies to portable magnetic ferritometers for austenitic stainless steels used to measure the proportion (percentage) of the ferritic phase in castings, welds, overlays and base metal. The standard covers both volume (through‑sample) and local (surface/overlay) instruments, calibration and verification requirements, and conditions for use, storage and transport.

Key topics and requirements

• Classification of ferritometers: volume (with through‑sample probes) and local (with surface/clip‑on probes); hybrid designs allowed when specified.
• Measurement ranges: typical instrument ranges include 0–2.5%, 0–10% and 0–20% for analog (pointer) indicators; 0–20% for digital readouts; other ranges may be specified in technical conditions for particular instrument types.
• Power supply options: mains AC (50 Hz, 220 V), or internal/external DC sources as required for the specific instrument type.
• Operating frequencies: volume ferritometers — 50 Hz (with limits per applicable power‑quality standards); local ferritometers — selectable in the 400–2000 Hz range (±2% allowable deviation).
• Mass limits: typical maxima specified (examples: up to ~12 kg for volume instruments with pointer indicators; lower mass limits for digital versions and local probes as defined in technical conditions).
• Calibration and verification: mandatory graduation against state standard reference samples and primary/periodic verification procedures per the state metrology rules (calibration/verification referenced to GOST 8.518 and related metrology standards).
• Acceptance, testing and reliability: requirements for factory acceptance tests, periodic checks, reliability test planning and manufacturer guarantees are specified; sampling and test plans referenced to relevant GOST methods.

Typical use and users

Used by metallurgical plants, foundries, welding and fabrication shops, quality control and non‑destructive testing (NDT) laboratories, inspection and commissioning engineers, and manufacturers of ferritometers. Typical applications include checking ferrite content in austenitic stainless steel castings, welded joints and surfacings to ensure corrosion resistance and mechanical property consistency.

Related standards

References and related documents include earlier ГОСТ 26364‑84 (replaced), GOST 8.518 (methods for primary and periodic verification / calibration procedures), GOST 22261 (electrical and magnetic measurement instruments general requirements), GOST 23706 (requirements for electro‑measurement indicating instruments), national welding standards for ferrite determination (for example GOST R 53686‑2009) and international guidance such as ISO/AWS methods for ferrite measurement; newer metallographic ferrite‑determination documents (e.g., ISO/TS developments) may also be relevant for laboratory metallographic comparisons and method correlation.

Keywords

ferritometer, ferrite content, austenitic stainless steel, non‑destructive testing, magnetic method, calibration, verification, weld inspection, ferrite percentage.

FAQ

Q: What is this standard?

A: GOST 26364‑90 is the interstate (national) standard that defines general technical specifications and metrological requirements for portable magnetic ferritometers intended to measure ferrite content in austenitic stainless steels.

Q: What does it cover?

A: It covers instrument classification (volume and local ferritometers), measurement ranges and accuracy classes, power and frequency requirements, mass limits, calibration and verification procedures, acceptance and test methods, transport and storage, and manufacturer guarantees.

Q: Who typically uses it?

A: NDT technicians, metallurgists, welding inspectors, quality control laboratories, manufacturers of ferritometers and end‑users in foundries, fabrication shops and industries working with corrosion‑resistant austenitic steels.

Q: Is it current or superseded?

A: The 1990/1992 text (GOST 26364‑90) is published and has been used as the governing technical specification for ferritometers (it replaced ГОСТ 26364‑84). Users should check national indexes and current regulatory lists for any more recent replacements or updates applicable in their jurisdiction; related national standards (for specific welding‑joint ferrite determination) such as GOST R 53686‑2009 and international technical specifications may provide supplementary or more recent method guidance.

Q: Is it part of a series?

A: It is part of the body of standards on measurement of electrical and magnetic quantities and metallurgical testing; it is cross‑referenced by metrology and testing standards (for example GOST 8.518, GOST 22261 and other metal testing/inspection standards).

Q: What are the key keywords?

A: Ferritometer; ferrite measurement; austenitic stainless steel; magnetic method; NDT; calibration; verification; ferrite percentage.