In Xiamen, Fujian, a heavy chemical factory faces the challenge of long-term corrosion of core equipment components by corrosive media and frequent replacements. The stainless steel forgings required for key sections of the plant require high corrosion resistance, good mechanical properties, and dimensional stability, but previous suppliers struggled to balance corrosion resistance and machining precision, and the long delivery cycle affected production continuity.

Customer pain points

During production, the stainless steel forgings used in this chemical heavy plant are exposed to high temperatures, high pressure, and highly corrosive media for extended periods. The original forgings had the following issues: First, the material's resistance to intergranular corrosion was insufficient, causing local pitting and stress corrosion cracking after a period of operation; Second, poor internal structural uniformity of the forging, resulting in deformation and dimensional excesses after machining, which affects assembly accuracy; Third, the supply cycle for non-standard custom parts exceeds 60 days, making it impossible to match production line maintenance schedules in time, resulting in unplanned downtime losses.

Product advantages

To address these pain points, Jianing Forging offers customized solutions from material selection and forging processes to heat treatment and temperature control:

• Lower-carbon austenitic stainless steel and duplex stainless steel are selected, and chemical composition verified by third-party testing agencies helps keep chromium, molybdenum, and nickel content within an optimized range, thereby improving corrosion resistance;
• Using multi-directional forging + temperature-controlled forging processes, grain structure is refined and dendrite segregation eliminated, keeping the difference in mechanical properties between transverse and longitudinal parts within 5%;
• Equipped with a dedicated heat treatment curve, rapid cooling is achieved during the solution stage, preventing σ phase precipitation while also helping to stabilize the dimensional dimensions of the workpiece;
• Production cycles are compressed to under 30 days, and test rods are processed with the furnace and test reports are issued to meet on-site assembly needs.

The delivered stainless steel forgings were tested by the customer's installation machine and, after six months of continuous operation, showed no signs of corrosion or deformation. The first-pass assembly pass rate increased to over 98%, effectively reducing maintenance costs and downtime risks for the chemical heavy plant.