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Different Types of Stainless Steel for Pharmaceuticals


Different types of stainless steel suitable for pharmaceutical production and used in manufacturing of pharmaceutical equipments.
There are different grades of stainless steel according the composition like 302, 304, 304L, 316, 316L, 410, 430, 440 etc. but all are not used in pharmaceutical. Pharmaceutical equipment are made with the material that should not react with the active material or excipients used in pharmaceutical manufacturing.

Stainless Steel Scoop
The word ‘stainless steel’ itself says the steel that doesn't get stain or rust. Stainless steels are highly stable material under different environmental conditions.

Mainly four types of stainless steels are used in pharmaceutical equipment manufacturing, 304, 304L, 316 and 316L. Stainless steel 316 and 316L are used to construct the equipment those get direct contact to the pharmaceutical products including water system tanks and pipelines while 304 is used for the non contact parts. Stainless steel 316 is more resistant than 304 against the acid and base attacks. Weak acids and bases have no effect on the stainless steel. Both of these are non magnetic. The stainless steel grades with L (304L and 316L) has low amount of carbon (0.03%).

Different types of stainless steels and their composition:


SS Type
Stainless Steel Ingredients (%)
C
Mn
Si
P
S
Cr
Ni
Mo
N
304
0.08
2.0
0.75
0.045
0.03
18-20
8.0-10.5
-
-
304L
0.03
2.0
0.75
0.045
0.03
18-20
9.0-13.0
-
-
316
0.08
2.0
1.0
0.045
0.03
16-18
10.0-14.0
2.0-3.0
0.1
316L
0.03
2.0
1.0
0.045
0.03
16-18
12.0-15.0
2.0-3.0
0.1

These elements are added in steel to develop the special properties. Chromium (Cr) is added in the stainless steel to make its surface resistant to the corrosion, oxidation and to give it tensile strength. 2% Manganese (Mn) improves working strength of the stainless steel at high temperature while above 2% also increases the tensile strength. Silicon (Si) gives the strength and resistance against strong acids as sulfuric acid. Nickel (Ni) improves the resistance to the hot and humid environmental conditions. These properties make the stainless steel strong and durable.
Ankur Choudhary is India's first professional pharmaceutical blogger, author and founder of Pharmaceutical Guidelines, a widely-read pharmaceutical blog since 2008. Sign-up for the free email updates for your daily dose of pharmaceutical tips.
Email: .moc.enilediugamrahp@ofni Need Help: Ask Question


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