ISO 17634-2015 PDF

Full title and description

Welding consumables — Tubular cored electrodes for gas shielded metal arc welding of creep‑resisting steels — Classification (ISO 17634:2015). This International Standard specifies requirements for the classification of tubular (flux‑ or metal‑) cored electrodes intended for gas‑shielded metal‑arc welding of creep‑resisting and low‑alloy elevated‑temperature steels in the post‑weld heat‑treated condition.

Abstract

ISO 17634:2015 defines a combined classification system for tubular cored electrodes used with gas‑shielded metal‑arc welding on creep‑resisting steels. The standard allows classification either on the basis of the all‑weld‑metal chemical composition or on the basis of tensile strength together with chemical composition. A single electrode product may be tested and classified for use with different shielding gases; requirements are given for testing, designation and marking in the post‑weld heat‑treated (PWHT) condition.

General information

• Status: Published (International Standard; listed for review/revision).
• Publication date: 23 July 2015 (published edition 2015 / often shown as Aug 2015 in ISO metadata).
• Publisher: International Organization for Standardization (ISO).
• ICS / categories: 25.160.20 – Welding consumables.
• Edition / version: Edition 2 (2015).
• Number of pages: 23 (English edition).

Scope

Applies to tubular cored electrodes intended for gas‑shielded metal‑arc welding of creep‑resisting and low‑alloy elevated‑temperature steels where the welds are subject to post‑weld heat treatment. The standard covers classification principles, test requirements and designation systems for electrodes evaluated in the PWHT condition and allows for classification with respect to different shielding gases where applicable.

Key topics and requirements

• Two classification routes: (A) based on all‑weld‑metal chemical composition; (B) based on tensile strength plus chemical composition of all‑weld metal.
• Testing and classification may be carried out for a single electrode using different shielding gases; shielding gas influences classification tables and marking.
• Requirements specified for electrodes intended for use in the post‑weld heat‑treated (PWHT) condition.
• Designation and marking scheme to record electrode classification, shielding gas, welding position and PWHT state.
• Mechanical property and chemical composition thresholds for the all‑weld metal used to assign classification symbols.

Typical use and users

Used by manufacturers and suppliers of welding consumables, welding engineers and fabricators working on power‑plant, boiler, petrochemical and other high‑temperature components where creep resistance is required. It is referenced by procurement and quality assurance teams to specify and verify tubular cored electrodes for production welding of elevated‑temperature steels.

Related standards

Closely related ISO and national/adopted standards include other tubular‑cored electrode classification standards in the ISO 1763x series and national/adopted EN ISO versions. Examples: ISO 17633 (classification of tubular cored electrodes/rods for stainless and heat‑resisting steels), ISO 17632 (tubular cored electrodes for non‑alloy and fine‑grain steels) and the approved work item ISO/AWI 17634 (update/revision work item replacing the 2015 edition). Regional/adopted standards (EN, DIN, BS) provide equivalent text and national implementation.

Keywords

tubular cored electrodes, welding consumables, gas‑shielded metal‑arc welding, creep‑resisting steels, classification, post‑weld heat treatment (PWHT), all‑weld metal composition, tensile strength, shielding gas.

FAQ

Q: What is this standard?

A: ISO 17634:2015 is an international standard that specifies how tubular cored electrodes for gas‑shielded metal‑arc welding of creep‑resisting and elevated‑temperature steels are classified and designated, particularly for use when welds receive post‑weld heat treatment (PWHT).

Q: What does it cover?

A: It covers classification systems (composition‑based and tensile‑plus‑composition‑based), testing arrangements (including allowance for different shielding gases), marking and designation rules, and the requirements for electrodes evaluated in the PWHT condition.

Q: Who typically uses it?

A: Welding consumable manufacturers, procurement/specification authors, welding engineers, fabrication shops, inspection and quality personnel in industries that require creep‑resistant welds (power generation, petrochemical, steam plant components, high‑temperature pressure parts).

Q: Is it current or superseded?

A: ISO 17634:2015 is a published (second) edition. The ISO bibliographic record shows the 2015 edition as published and confirmed in a subsequent review (ISO confirms/records periodic review); an ISO work item (ISO/AWI 17634) is registered to produce a revision/replacement, so users should check the latest ISO catalogue or national adoption for any newer edition or amendment before specifying.

Q: Is it part of a series?

A: Yes — it sits within a family of ISO standards for tubular cored electrodes and welding consumables (the ISO 1763x series and related ISO/TC 44 publications) that address classification for different base‑metal groups (non‑alloy, stainless, heat‑resisting, high‑strength and creep‑resisting steels).

Q: What are the key keywords?

A: tubular cored electrode; welding consumables; creep‑resisting steel; gas‑shielded metal‑arc welding; classification; PWHT; all‑weld metal composition; tensile strength; shielding gas.