In December 2024, Peak Kong Special Steel’s welding team achieved another milestone by successfully completing the welding procedure qualification for duplex stainless steel 2205 and super duplex stainless steel 2507. The team passed the rigorous assessment of the Hong Kong Laboratory Accreditation Scheme (HOKLAS) and obtained the welding procedure qualification certificate. This accomplishment further highlights Peak Kong Special Steel’s exceptional technical expertise in high-end stainless steel welding.

Duplex stainless steel 2205 and super duplex stainless steel 2507 are widely used in marine engineering, chemical equipment, energy infrastructure, and other demanding industrial fields due to their excellent corrosion resistance, high strength, and good weldability. However, the welding process for these materials is highly challenging, particularly in effectively controlling performance degradation in the heat-affected zone (HAZ) and maintaining the balance of the duplex structure during welding. This requires precise control of welding techniques and process parameters to ensure optimal results.

Peak Kong Special Steel’s welding team demonstrated its strong technical expertise during this procedure qualification. Through numerous trials and optimizations, the team successfully addressed key technical challenges, including heat input control, phase balance, and corrosion resistance maintenance. By precisely adjusting welding parameters during the process, they ensured that the mechanical properties and corrosion resistance of the weld zone met international standards.

The Hong Kong Laboratory Accreditation Scheme (HOKLAS), renowned for its strict and impartial certification standards, is an internationally recognized laboratory accreditation system. Peak Kong Special Steel’s successful completion of the HOKLAS assessment and attainment of the welding procedure qualification certificate signifies that the company’s welding technology has reached a leading level. This achievement provides a solid endorsement for the company’s further expansion into international markets.

The welding procedures accredited by HOKLAS will be widely applied in the fabrication of various high-performance duplex stainless steel structures, covering fields such as marine engineering, petrochemical equipment, high-pressure vessels, and energy infrastructure. Peak Kong Special Steel remains committed to driving progress through technological innovation, continuously enhancing product quality and service capabilities to provide more reliable and efficient steel solutions for customers worldwide.