Melt Pressure Transducer Diaphragm Material and Coating Selection Chart

15-5 with Armology Coating
Hastalloy Tip, Diaphragm and Threads 
15-5 with Electroless Nickel Coating 
15-5 with Titanium Nitride Coating 
* Inconel Diaphragm with Proprietary Coating
Modification Number
7,500 PSIG + up
M123 all ranges
7,500 PSIG + up
M160 all ranges
Diaphragm Thickness (inches)
M110 (.0080)
M123 (.0045)
M161 (.0080)
M160 (.0045)
Standard Applications
Excellent Corrosion Resistance
Good Corrosion and Abrasion Resistance
Excellent Abrasion Resistance
Excellent Abrasion Resistance & Impervious to Corrosion
* Used in applications which are extremely abrasive such as : ceramics or glass filled nylon

The standard ISI transducer diaphragm is machined out of a single piece of type 15-5PH stainless steel, heat treated and then Armoloy coated. This material gives ISI transducers the traverse strength and toughness needed for most standard applications.

There are, however, certain extrusion processes that require different types of diaphragm materials and/or coatings. ISI is able to supply customers with a diaphragm and coatings specifically suited to their needs and applications.