Summary:

Filler materials containing chromium are often used in the welding of stainless steel components in order to prevent corrosion.  The evaporation and oxidation of material from molten weld pools results in the generation of various compounds and metallic species in the fumes, including carcinogenic hexavalent chromium (Cr(VI)), which is an environmental and health hazard.  In fact, OSHA has recently set new standards for the maximum permissible exposure of Cr(VI) in the workplace.  Solutions such as alternative welding methods, ventilation systems, protective equipment, and medical monitoring can all help to reduce a worker’s exposure to Cr(VI), but these methods can be costly in terms of both direct and productivity costs.

To address this need, researchers at The Ohio State University have developed Chromium-free (and Manganese-free) welding consumables that are cost-effective and will help meet regulatory requirements without sacrificing the quality and corrosion-resistance of stainless steel welds, particularly type 304 steel.  As the consumable filler material is typically the major source of welding fumes, this solution is a very attractive and cost-effective way to meet regulatory requirements and help to ensure worker safety.

Potential Applications:

• Welding consumables

Advantages:

• Cost effective
• Excellent strength and corrosion resistance properties
• Greatly reduces the amount of Cr(VI) found in welding fumes
• Particularly suited for type 304 steel

IP Status:

Patent pending