Stainless Steel

Stainless Steel Processing Steps

Step 1. Smelting: Raw materials like iron ore, nickel, chromium, and molybdenum are melted to form stainless steel liquid.
Step 2. Casting: The stainless steel liquid is poured into a mold to form a slab or bar billet, which is then cooled to form an ingot.
Step 3. Rough Processing:
– Hot Rolling: The heated billet is rolled into a plate, bar, or tube of the required thickness through a rolling mill.
– Forging: Parts of the required shape are formed through a forging hammer or press at high temperatures.
– Cold Rolling: Further rolling at room temperature reduces thickness and improves surface finish and mechanical properties.
– Cold Drawing: Stretching through a die in a cold state to obtain precise dimensions and higher strength.
Step 4. Heat Treatment: Annealing is used to eliminate internal stress, improve toughness and machinability; quenching and tempering are used to adjust hardness and toughness.
Step 5. Surface Treatment: Divided into pickling, passivation, and polishing, to remove impurities, create a protective layer, or obtain a smooth surface through grinding.
Step 6. Forming and Processing: Thin plate parts can be produced by stamping, size cutting can be performed by cutting, and stainless steel originals can be prefabricated by welding.
Step 7. Inspection and Testing: Ultrasonic, X-ray, or magnetic particle testing methods are usually used to detect internal defects. Sampling is sent for inspection to test tensile strength, yield strength, ductility, and hardness.
Step 8. Packaging and Transportation: Anti-rust paper, plastic film, and wooden boxes are used for packaging to prevent damage and corrosion during transportation. Each batch of stainless steel products is accompanied by material certification and quality inspection certificates.

Through these steps, SSM ensures the high quality and broad application of stainless steel products from raw materials to finished products.