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Tri-State Flame Hardening Co has been at the forefront of flame hardening and precision straightening services since 1976. Our ISO-9001:2015 certification underscores our commitment to delivering superior quality in flame hardening and vibratory stress services across various industries, including automotive, military, aerospace, medical, maritime, and consumer sectors. With over five decades of experience, we've honed our craft to provide exceptional results that meet the most demanding specifications.

At Tri-State Flame Hardening Co, we transform ordinary metal components into extraordinarily durable building materials through our specialized flame hardening process. Our technique selectively heats the surface of metal parts before rapid cooling, creating a wear-resistant outer layer while maintaining the interior's toughness—extending the lifespan of your construction materials and reducing long-term replacement costs.

Our Vibratory Stress Relief (VSR) technology provides a non-thermal alternative to traditional heat treatment methods, effectively reducing residual stresses in metal components without the risk of thermal distortion. We've engineered our VSR process to deliver consistent results across various metal types and geometries, saving you valuable production time while extending the service life of your manufactured parts.