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Analysis of 14 kinds of metal materials commonly used in gaskets

DataTime:[2/9/2020]

What are the characteristics of the 14 kinds of metal materials commonly used in gaskets? We will give you an analysis one by one. If you have any related questions, you can also call the ship seal. Let's discuss it together.

metal materials commonly used in gaskets

1. Carbon steel

The recommended maximum operating temperature does not exceed 538 ° C, especially when the medium is oxidizing. High-quality thin carbon steel sheets are not suitable for use in equipment for the production of inorganic acid, neutral or acidic salt solutions. If carbon steel is subjected to stress, the equipment accident rate under hot water conditions is very high. Carbon steel gaskets are commonly used for high concentrations of acids and many alkaline solutions. The Brinell hardness is about 120.

2. 304 stainless steel

18-8 (chromium 18-20%, nickel 8-10%), the recommended maximum operating temperature does not exceed 760 °C. In the temperature range of -196~538 °C, stress corrosion and grain boundary corrosion are prone to occur. Brinell hardness of 160.

3. 304L stainless steel

The carbon content does not exceed 0.03%. The recommended maximum operating temperature does not exceed 760 °C. Corrosion resistance is similar to 304 stainless steel. The low carbon content reduces the precipitation of carbon from the crystal lattice, and the resistance to intergranular corrosion is higher than that of 304 stainless steel. The Brinell hardness is about 140.

4. 316 stainless steel

18-12 (chromium 18%, nickel 12%), adding about 2% molybdenum in 304 stainless steel, when the temperature increases its strength and corrosion resistance. It has higher creep resistance than other common stainless steels when the temperature is increased. The recommended maximum operating temperature does not exceed 760 °C. The Brinell hardness is about 160.

5. 316L stainless steel

The recommended maximum continuous operating temperature does not exceed 760 ° C ~ 815 ° C. The carbon content does not exceed the stress resistance and grain boundary corrosion of 316 stainless steel. The Brinell hardness is about 140.

6. 20 alloy

45% iron, 24% nickel, 20% chromium and a small amount of molybdenum and copper. The recommended maximum operating temperature does not exceed 760 ° C ~ 815 ° C. It is especially suitable for the manufacture of equipment resistant to sulfuric acid corrosion with a Brinell hardness of approximately 160.

7. Aluminum

Aluminum (content not less than 99%). Aluminum has excellent corrosion resistance and processing properties and is suitable for the manufacture of double-clamp gaskets. The Brinell hardness is about 35. The recommended maximum continuous operating temperature does not exceed 426 °C.

8. Copper

The composition of copper is close to pure copper, which contains traces of silver to increase its continuous operating temperature. The recommended maximum continuous operating temperature does not exceed 260 °C. The Brinell hardness is about 80.

9. Brass

(66% copper, 34% zinc), it has good corrosion resistance under most working conditions, but it is not suitable for acetic acid, ammonia, salt and acetylene. The recommended maximum continuous operating temperature does not exceed 260 °C. The Brinell hardness is about 58.

10. Hastelloy B-2

(26-30% molybdenum, 62% nickel and 4-6% iron). The recommended maximum operating temperature does not exceed 1093 °C. It has excellent heat resistance and hydrochloric acid corrosion performance. It also has excellent resistance to wet hydrogen chloride gas corrosion, sulfuric acid, phosphoric acid and reducing salt solution corrosion. It has high strength under high temperature conditions. The Brinell hardness is about 230.

11. Hastelloy C-276

16-18% molybdenum, 13-17.5% chromium, 3.7-5.3% tungsten, 4.5-7% iron, and the rest are nickel). The recommended maximum operating temperature does not exceed 1093 °C. Has excellent corrosion resistance. It has excellent corrosion resistance for various attempts of cold nitric acid or boiling nitric acid with a concentration of 70%, good resistance to hydrochloric acid and sulfuric acid corrosion and excellent stress corrosion resistance. The Brinell hardness is about 210.

12. Inconel 600

Nickel based alloy (77% nickel, 15% chromium and 7% iron). The recommended maximum operating temperature does not exceed 1093 °C. It has high strength under high temperature conditions and is usually used in equipment that needs to solve stress corrosion problems. Excellent low processing performance at low temperatures. The Brinell hardness is about 150.

13. Monel 400

(Copper 30%, nickel recommended maximum continuous working temperature does not exceed 815 ° C. In addition to strong oxidizing acid, it has excellent corrosion resistance to most acids and bases. Stress corrosion is easy to occur in hydrofluoric acid, mercuric chloride, mercury medium Cracks, therefore, are not suitable for use in the above media. They are widely used in the manufacture of hydrofluoric acid. The Brinell hardness is about 120.

14. Titanium

The recommended maximum operating temperature does not exceed 1093 °C. Excellent corrosion resistance at high temperatures. It is well known that it is resistant to chloride ions and has excellent resistance to nitric acid corrosion over a wide range of temperatures and concentrations. Titanium is used in most alkaline solutions and is suitable for use in oxidizing conditions. The Brinell hardness is about 216.

Source: China Stainless Steel Gaskets Manufacturer - Yaang Pipe Industry Co., Limited (www.yaang.com)

Tel No:+86-18267732328 / Fax No :86-0577-56809281 / Email:sales@yaang.com
Address:Longwan District, Wenzhou, Zhejiang Province, China.

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