ISO/TR 17671-4-2002 pdf download.Welding – Recommendations for welding of metallic materials一 Part 4: Arc welding of aluminium and aluminium alloys.
This part of ISOITR 17671 gives general recommendations for the manual, mechanized and automatic fusion welding of wrought and cast aluminium alloys and combinations thereof.
For general guidelines, see ISOITR 17671-1.
In this part of ISOITR 17671 the word ‘pipe” alone, or in combinations, is used to mean tub& or hollow section, although these terms are often used by different industries for different categories of product.
2 References
ISO 3834-2, Quality requirements for welding — Fusion welding of metallic materials — Part 2: Comprehensive quality requirements
ISO 3834-3, Quality requirements for welding — Fusion welding of metallic materials — Part 3: Standards quality requirements
ISO 4063:1998, Welding and allied processes — Nomenclature of processes and reference numbers.
ISO 6520-1. Welding and allied processes — Classification of geometric imperfections in metallic materials — Part 1: Fusion welding
ISO 6947:1990, Welds — Working positions — Definitions of angles of slope and rotation
ISO 9606-2, Approval testing of welders — Fusion welding — Part 2: Aluminium and aluminium alloys.
ISO 9692-3, Welding and allied processes — Recommendations for joint preparation — Part 3: Metal inert gas welding and tungsten inert gas welding of aluminium and its alloys
ISO 9956-1, Specification and approval of welding procedures for metallic materials — Part 1: General rules for fusion welding
ISO 9956-2, Specification and approval of welding procedures for metallic materials — Part 2: Welding procedure specification for arc welding
ISO 9956-4, Specification and approval of welding procedures for metallic materials — Part 4: Welding procedure tests for the arc welding of aluminium and its alloys
ISO 10042, Arc-welded joints in aluminium and its weldable alloys — Guidance on quality levels for imperfections
ISO 14175:1997, Welding consumables — Shielding gases for arc welding and cutting
3 Terms and definitions
For the purposes of this part of ISO/TR 17671, the terms and definitions of ISO/TR 17671-1 apply.
4 Provision of quality requirements
In order to ensure the quality of work, it should be performed by approved personnel in accordance with e.g. Iso 9606-2, ISO 14732 and ISO 14731 using approved procedures, e.g. ISO 9956-1, Iso 9956-2, ISO 9956-4 and ISO 15614-4.
5，Parent metal
5.1 General
This part of ISO/TR 17671 applies to wrought, cast and combinations of aluminium, e.g. in accordance with ISO 9606-2, ISO 14732, ISO 9956-4 and Iso 15614-4. The principles of this part of ISO/TR 17671 can be applied to other non-standard or proprietary aluminium alloys, which can include the advanced superplastic alloys and metal matrix composites, provided the composition of the alloy falls within the parent metal groups listed in annex B. In such cases, the use of this part of ISO/TR 17671 shall be in accordance with the design specification.
Material standards do not fully take into account welding requirements. For this reason, it is sometimes necessary to specify additional requirements for the material when placing the order. This can include selection/restriction of compositionlmechanical properties (within certain additional limits to the basic standard requirements) and additional cleanliness of the components.
Permanent backing material and temporary attachments should be compatible with the parent metal.
5.2 Storage and handling
Contact with ferritic materials and copper should be avoided, in order to prevent corrosion.
To avoid the use of incorrect materials, they should be stored so that the alloy type is known (see warning on hard
stamping in ISOITR 17671-1:—).
6 Factors affecting properties of welded structures and assemblies
A short list of possible detrimental effects that can occur as a result of welding, is given in annex A. The list is not exhaustive but features those metallurgical and technological influences that are specific to, or more prevalent with, aluminium. Potential causes and counter measures are also listed.
Consideration shall be given, e.g. in the design of welded structures, to the mechanical properties of the heat affected zone (hAZ) and the weld deposit which can be influenced by the welding procedure. For instance, the weld deposit and the HAZ can have lower mechanical properties than the parent material.
Care should be taken to avoid the creation of any HAZ that has not been considered in the design, e.g. ISO/TR 17671-4 pdf download.