Not all stainless steel is created equal, and the grade used in a surgical instrument affects everything from corrosion resistance to how the instrument feels in a surgeon’s hand.
Most reusable surgical instruments are manufactured from martensitic or austenitic stainless steel grades, chosen for a balance of hardness, corrosion resistance and the ability to take a fine edge where needed. Martensitic grades are typically used where hardness matters, such as scissors and cutting instruments, because they can be heat-treated to a precise hardness level. Austenitic grades are more corrosion-resistant and are common in retractors, forceps and other non-cutting instruments that go through repeated sterilization cycles.
Corrosion resistance is worth asking about directly. Instruments that are autoclaved hundreds of times over their working life need a surface finish and steel composition that resists pitting and staining. A manufacturer should be able to explain what testing is done to check corrosion resistance before instruments are shipped.
Surface finish also affects both function and appearance. A properly polished instrument reduces the risk of tissue drag and makes cleaning easier between uses, while a rushed polish can leave micro-scratches that trap debris and eventually corrode.
When sourcing instruments for your own brand, ask your manufacturer directly which steel grade is used for each product category and what hardness testing is performed. A supplier who can answer specifically, rather than with a generic “surgical steel” response, is a good sign of a serious manufacturing operation.