Select Page

METAL GASKETS

Metallic gaskets can be fabricated from a single metal or a combination of metallic materials, in a variety of shapes and sizes. Metallic gaskets are suitable for high temperature and pressure applications. Higher loads are required to seat the gaskets. Types include flat, grooved, round cross-section solid metal, lens rings, ring type joints (RTJ’s) and welded gaskets. A brief description of the more popular styles are described below.

Spiralwound

Spiralwound Gaskets

thomson canflex cammprofile 942a ar gasket

Cammprofile Gaskets

High Temp

High Temp Gaskets

Heat Exchanger

Heat Exchanger

RTJ

Ring Type Joint Gaskets

Common Metallic Gasket Materials

The following is a listing of the more common metals used in manufacturing both semi- metallic and metallic gaskets. It is not intended to be a list of all available materials, only the typical materials. For a more complete listing, contact your gasket supplier or manufacturer to discuss all the materials which they may have available. Refer to EN 10027-1 and EN 10027-2 Designations Systems for Steel Part 1: Steel Names and Part 2: Steel Numbers and The Unified Numbering System (UNS) for Metals and Alloys for complete list of metal standards.

Aluminum

Has excellent corrosion resistance to organic acids except nitric acids.


Brass

Copper alloys are generally used with non-oxidizing acids, alkaline and neutral salt solutions.


Carbon Steel

The most commonly used material for manufacturing double jacketed gaskets. It has poor resistance to corrosion and should be used with caution when in contact with water or diluted acids.


Copper

Used successfully in acetic acids, nitrates and many organic chemicals


Hastelloy® B

This is a corrosion resistant alloy resists corrosion of hydrochloric acid under most conditions, as well as, other halogen acids. It is also resistant to phosphoric acid and reducing conditions.


Hastelloy® C

Offers exceptional resistance to severe oxidizing conditions encountered with nitric acid, free chlorine as well as strong aqueous and acid solutions.


Inconel®

Withstands high temperatures and has excellent resistance to corrosion by halogen gases and compounds.


Lead

Good resistance to sulfuric, chromic and phosphoric acids. It is soft and malleable.


Monel®

Excellent resistance to most acids and alkalis except extremely oxidant acids.


Nickel

Excellent resistance to caustic substances. Has a high degree of corrosion resistance to neutral and distilled water.


Titanium

Has a good resistance to wet chlorine and chlorine dioxide.


Type 304 Stainless Steel (1.4362)

This material is widely used in the manufacture of industrial gasketing, due to its low cost and excellent resistance to corrosion.


Type 316 (1.4401) /316L (1.4404) Stainless Steel

This material generally offers a higher resistance to corrosion than type 304SS.


Type 321 Stainless Steel (1.4541)

This alloy is similar to 304SS but titanium is added. It is widely used in high temperature corrosive applications.


Type 347 Stainless Steel (1.4550)

This alloy is similar to 304SS but columbium and titanium are added. It has good performance in high temperature corrosive applications.


Type 410 Stainless Steel (1.4006)

This stainless steel is a heat treatable 12% chromium steel, which combines good general corrosion resistance with high strength.

Screen Shot 2020 09 21 at 4.58.45 PM

Total Sealing Integrity

 

As Total Sealing Integrity and Asset Management specialists, we create and promote best bolting practices for our customers through consultation and safety training. We emphasize and develop practices toward achieving bolted joint reliability, gasket selection criteria specific to our customers' unique applications and regularly manage and update our customers’ equipment database. We provide site surveys, inspections, and audits of our customer’s equipment through our technical services group and offer virtual, on-site or in-house training programs. Contact your local A.R. Thomson Group or view our Total Sealing Integrity brochure for more details.