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Credibility ,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.
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 / Email:[email protected]
Address:Longwan District, Wenzhou, Zhejiang Province, China.
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