Directed by the National Welding Standardization Technical Committee

Harbin Welding Institute Limited Company is responsible for the revision and formulation of GB/T 3670—2021

Covered Electrodes for Manual Metal Arc Welding of Copper and Copper Alloys

GB/T 41110—2021

Tubular Cored Electrodes for Gas Shielded and Non-gas Shielded Metal Arc Welding of Nickel and Nickel Alloys

GB/T 41111—2021

Rods for Gas Welding of Non-Alloy and Creep-Resisting Steels

and GB/T 41112—2021

Solid wire electrodes

solid wires and rods for fusion welding of magnesium and magnesium alloys

. These four national standards were issued on December 31

2021 and will be formally implemented on July 1

2022.

Covered electrodes for manual metal arc welding of copper and copper alloys

is the second revision. This revision has been converted into the ISO system

and the designation has been reformed. The structure has been greatly adjusted

and the technical content has changed a lot.

Tubular cored electrodes for gas shielded and non-gas shielded metal arc welding of nickel and nickel alloys

Rods for gas welding of non-alloy and creep-resisting steels

and

Solid wire electrodes

solid wires and rods for fusion welding of magnesium and magnesium alloys

are formulated. They are converted according to the corresponding ISO standards which the main technical content is the same as. The standard structure has been adjusted according to the domestic usage. These standards make up the blank of the national standard

and provide important technical support for the research and development

manufacturing and re-inspection of welding materials. This paper introduces the revision of the standard system from the designation and technical requirements

and compares and analyzes with the corresponding national standards abroad

so that users can better understand

master and implement the new standards.This paper introduces the situation of revising and formulating the standard

so that users can better understand

master and implement the new standards. Structural adjustment is big

technical content changes much.