The International Organization for Standardization (ISO) has developed two standards for the qualification of welders for fusion welding: ISO 9606-1 and ISO 9606-2. These standards specify the requirements for welders to demonstrate their ability to produce welds that meet the required quality standards.
Difference between ISO 9606-1 and ISO 9606-2
ISO 9606 is an international standard that specifies the requirements for qualification of welders for fusion welding. It is divided into two parts:
- ISO 9606-1: Steels
- ISO 9606-2: Aluminium and aluminium alloys
This article will discuss the key differences between these two parts of the standard.
1. Scope
ISO 9606-1 applies to the qualification of welders for fusion welding of steels. It covers a wide range of steels, including carbon steels, alloy steels, and stainless steels.
ISO 9606-2 applies to the qualification of welders for fusion welding of aluminium and aluminium alloys. It covers a wide range of aluminium alloys, including wrought alloys, cast alloys, and heat-treatable alloys.
2. Welding processes
ISO 9606-1 covers the following welding processes:
- Gas metal arc welding (GMAW)
- Gas tungsten arc welding (GTAW)
- Shielded metal arc welding (SMAW)
- Submerged arc welding (SAW)
- Electroslag welding (ESW)
- Flux-cored arc welding (FCAW)
ISO 9606-2 covers the following welding processes:
- Gas metal arc welding (GMAW)
- Gas tungsten arc welding (GTAW)
- Shielded metal arc welding (SMAW)
- Submerged arc welding (SAW)
3. Joint preparation
ISO 9606-1 specifies a range of joint preparation types for steels. The joint preparation type must be selected based on the welding process and the material thickness.
ISO 9606-2 specifies a range of joint preparation types for aluminium and aluminium alloys. The joint preparation type must be selected based on the welding process, the material thickness, and the alloy type.
4. Test specimens
ISO 9606-1 specifies the use of flat butt weld test specimens for steels. The test specimens must be made from the same material as the material that will be welded in production.
ISO 9606-2 specifies the use of flat butt weld test specimens for aluminium and aluminium alloys. The test specimens must be made from the same material as the material that will be welded in production.
5. Acceptance criteria
ISO 9606-1 specifies a range of acceptance criteria for steels. The acceptance criteria must be met in order for the welder to be qualified. ISO 9606-2 specifies a range of acceptance criteria for aluminium and aluminium alloys. The acceptance criteria must be met in order for the welder to be qualified.
ISO 9606-1 and ISO 9606-2 are both important standards for the qualification of welders. They provide a set of requirements that can be used to ensure that welders have the skills and knowledge necessary to produce quality welds.
The key differences between the two standards are the materials they cover, the welding processes they allow, the joint preparation types they specify, the test specimens they use, and the acceptance criteria they require.
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