BS EN ISO 1071:2015 pdf download – Welding consumables — Covered electrodes, wires, rods and tubular cored electrodes for fusion welding of cast iron — Classification
This International Standard specifies requirements for classification of covered electrodes for manual metal arc welding, wire electrodes for metal arc welding, tubular cored electrodes for metal arc welding with and without a gas shield, rods for TIG-welding, and rods for oxy-fuel gas welding of unalloyed cast irons. Classification is based on the chemical composition of wires and rods and on the all-weld metal deposit for tubular cored and covered electrodes.
2 Normative references
The following documents, in whole or in part, are normatively referenced in this document and are indispensable for its application. For dated references, only the edition cited applies. For undated references, the latest edition of the referenced document (including any amendments) applies.
ISO 544, Welding consumables — Technical delivery conditions for filler materials and fluxes — Type of product, dimensions, tolerances and markings
ISO 2401, Covered electrodes — Determination of the efficiency, metal recovery and deposition coefficient
ISO 6847, Welding consumables — Deposition of a weld metal pad for chemical analysis
ISO 14175, Welding consumables — Gases and gas mixtures for fusion welding and allied processes
ISO 80000-1:2009, Quantities and units — Part 1: General. Corrected by ISO 80000-1:2009/Cor 1:2011
3 Classification
3.1 Wire electrodes and rods
For wire electrodes and rods classified in accordance with their chemical composition (see Table 2 and Table 3), the classification is divided into three parts.
a) The first part gives a symbol indicating the product to be identified.
b) The second part indicates the type of alloy (C for cast iron).
c) The third part gives a symbol indicating the chemical composition of the wire electrode or of the rod.
3.2 Tubular cored electrodes
For tubular cored electrodes classified in accordance with the all-weld metal chemical composition
produced with an appropriate shielding gas, the classification is divided into four parts.
a) The first part gives a symbol indicating the product to be identified.
b) The second part indicates the type of alloy (C for cast iron).
c) The third part gives a symbol indicating the chemical composition of the all-weld metal.
d) The fourth part gives a symbol indicating the shielding gas.
3.3 Covered electrodes
For covered electrodes classified in accordance with the all-weld metal chemical composition, the classification is based on an electrode diameter of 4 mm. The classification is divided into four parts.
a) The first part gives a symbol indicating the product to be identified.
b) The second part indicates the type of alloy (C for cast iron).
c) The third part gives a symbol indicating the chemical composition of the all-weld metal.
d) The fourth part gives a symbol indicating the effective electrode efficiency and the type of current.
3.4 Tubular cored and covered electrodes
The following classification of tubular cored and covered electrodes is split into two sections.
a) Compulsory section This section includes the symbol for the type of product, type of alloy, the chemical composition, and the shielding gas as defined in 4.1, 4.2, 4.3, and 4.4.
b) Optional section This section includes the symbol for the effective electrode efficiency and/or type of current for which the consumable is suitable as defined in 4.5.
The full designation (see examples in Clause 10) shall be used on packages and in the manufacturer’s literature and data sheets.
4 Symbols and requirements
4.1 Symbols for the product form
The symbol for the covered electrode shall be the letter E.
The symbol for the solid wire and rod shall be the letter S and the symbol for the tubular cored wire shall be T.
The symbol for the cast rod shall be R.
4.2 Symbol for the type of alloy
The symbol C as the second symbol shall be used to indicate the welding of cast iron as the main application.
4.3 Symbol for the chemical composition
4.3.1 General
The symbols in Table 2 and Table 3 indicate the chemical composition of rods and wire electrodes,as well as the chemical composition of the all-weld metal of covered electrodes and tubular cored electrodes in accordance with Clause 6.
A distinction has to be made between consumables producing similar and dissimilar weld metal.
4.3.2 Consumables producing similar weld metal
The consumables in this group are classified in accordance with the alloy type in Table 1. The symbols in Table 2 indicate the chemical composition of similar rods and similar all-weld metal of covered electrodes and tubular cored electrodes. The description of each consumable and examples for their application are given in Annex A.