Production

Product Information

Not all instruments are created equal.  Adequate for the job is, in reality, inadequate.  A better instrument reduces distractions and facilitates operations.  A better instrument helps a surgeon perform at his/her best.  A better instrument leads to better results.  Z.A.SHAHID SURGICAL provides better instruments.

 

Z.A.SHAHID SURGICAL Attributes

Whether crafted from German surgical stainless steel, or machined from U.S. surgical stainless steel, our instruments are recognized by their finely finished surface. They are designed to perform with precise surgical function and are also conceived to be affordable. It is this combination that distinguishes the Z.A.SHAHID SURGICAL brand.

 

Z.A.SHAHID SURGICAL Manufacturing

Z.A.SHAHID SURGICAL instruments are manufactured from stainless steel.  Stainless steel, though not truly stainless, is a highly corrosion and rust-resistant material.  The metal is extremely strong and durable and has the ability to form protective or “passivation” layers.

Stainless steel differs from carbon steel by the amount of chromium present. Unprotected carbon
steel rusts readily when exposed to air and moisture. This iron oxide film (the rust) is active and accelerates corrosion by forming more iron oxide. Stainless steels contain sufficient chromium to form a passive film of chromium oxide, which prevents further surface corrosion and blocks corrosion from spreading into the metal’s internal structure.  Passivation only occurs if the proportion of chromium is high enough.

Most Z.A.SHAHID SURGICAL surgical instruments are made from German stainless steel type 1.4021 – equivalent to American steel type 420.  This steel is highly corrosion resistant and has excellent longevity when properly maintained.  Steel type 1.4021 is composed primarily of iron. Other components are:

Carbon 0.17-0.25%
Silicon ≤ 1.0%
Manganese ≤ 1.0%
Phosphorous ≤ 0.045%
Sulphur ≤ 0.043%
Chromium 12.0-14.0%

During the manufacturing process every effort is made to ensure that the instruments are corrosion resistant.  However, if not properly maintained, stainless steel can rust and stain, reducing the life of the instrument or rendering it useless. For more detailed information on instrument care, see our Instrument Care & Cleaning instructions.

 

Heat Treatment

Heat treating makes the instruments hard and enables them to withstand rigorous use.  Stainless steel is brought to a very high temperature and then cooled until it has reached the proper hardness.  Hardness is measured in units called Rockwell Hardness (HRc).  A typical hardness range for needle holders is HRc 40-48.  For scissors, the range is HRc 50-58.

Heat treating and steel selection are just two of the more than 80 steps required to produce surgical instruments to Z.A.SHAHID SURGICAL standards. We monitor and verify the accuracy of our manufacturing process through frequent audits.