The welding coordination team, as per ISO 14731, is made up of two international welding technologists and one international welding inspector to ensure that customer requirements are met. All equipped with sound experience in metallurgical and mechanical engineering to repair level 1 plant components to OEM specifications. Our welders are qualified to ASME IX and ISO 14732 or ISO 9606-1 or 2, depending on the process used. MMS maintains a good relationship with 3rd party suppliers for NDT & PMI who handle all volumetric & surface flaw detection methods as well as PMI to ensure components leaving MMS bear outstanding integrity.

 

Our welding facilities are equipped to offer a variety processes to execute all types of repairs pertaining to the requirements of the client & industry specific standards.

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Welding processes include but are not limited to:

 

• Gas Tungsten Arc Welding (TIG)

• Gas Metal Arc Welding (MIG)

• Shielded Metal Arc Welding (SMAW)

• Sub Arc Welding (SAW)

• Electron Beam Welding (EBW)​​​​

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Electron beam welding joins ferrous metals, light metals, precious metals and

alloys to themselves or each other. It is a fusion process in which a beam of high velocity electrons is applied between two parts. EBW does not require any filler material. The two parts are simply fused as the material melts from the kinetic energy of the electrons that is transformed into heat upon impact.

 

Advantages:

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• Automated process.

• High depth to width ratio

• Maximum penetration (up to 35mm in mild steel)

• Minimal distortion

• Exceptional weld strength

• Perfect for intricate manufacturing

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• Plasma Transfer Arc and Stellite hardfacing  (PTA)

 

Stellite hardfacing is one of our biggest areas of expertise. We have numerous Stellite overlay procedures that include MIG, TIG and PTA. However, PTA, (Plasma transfer arc), is the preferred procedure if possible.

 

Plasma transfer arc welding is a versatile method of depositing high quality metallurgically-fused deposits on relatively low-cost surfaces. Alloys consisting of various hardness or sought- after properties, and carbide composites, can be deposited on a variety of base materials to achieve diverse properties such as mechanical strength, wear and corrosion resistance and creep.

 

Advantages:

 

• Fully automated

• Human interference minimised

• Constant heat input

• Less chance of cracks

• Excellent penetrations

• Strong bond

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• Cold Metal Transfer Welding (CMT)

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This is one of the new processes we have introduced in 2021. We currently have two CMT setups, one for general weld refurbishment while the second machine is set up to a KUKA robot arm for additive manufacturing research and development.

CMT welding is similar to gas metal arc welding but includes a wire pulsating function while welding, which gives it a lot more advantages over the gas metal arc welding process.

 

Advantages:

 

• Low heat input

• Low dilution

• Less distortion

• Less welding spatter

• Smaller heat affected zones in base material

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