The weight chart of stainless steel square and rectangle tube

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The stainless steel offers good corrosion resistance against most common chemical corrodents and industrial atmospheres. The stainless square or rectangle tubes have the advantages of long service life, good corrosion resistance and lightweight can be used in industrial piping, automotive, instrumentation, medical and construction industries, such as stair handrails, railings, partitions, bicycles, medical equipment, cars and so on. Here is the weight chart of 304 square and rectangle tubing:

304 Stainless steel square and rectangle tubing weight 

Length:6000mm, Unit:KG

Größe 0.4 0.5 0.6 0.7 0.8 0.9 1 1.2 1.5 2 2.5 3 4 5
10×10 0.74 0.91 1.09 1.26 1.43 1.59
12×12 0.89 1.1 1.32 1.53 1.73 1.93 2.13 2.53
15×15 1.12 1.39 1.66 1.92 2.19 2.45 2.71 3.21 3.95
18×18 1.35 1.68 2 2.32 2.64 2.96 3.28 3.9 4.8
19×19 1.42 1.77 2.12 2.46 2.8 3.13 3.47 4.12 5.09 6.63
20×20 1.5 1.87 2.23 2.59 2.95 3.3 3.66 4.35 5.37 7.01
22×22 2.06 2.46 2.86 3.25 3.65 4.04 4.81 5.94 7.78
23×11 1.58 1.89 2.19 2.49 2.79 3.09 3.67 4.52 5.87
23×23 2.15 2.57 2.99 3.14 3.82 4.23 5.04 6.23 8.16
24×12 1.77 2.12 2.46 2.8 3.13 3.47 4.12 5.09 6.63
24×24 2.25 2.69 3.12 3.56 3.99 4.42 5.27 6.51 8.54
25×25 2.34 2.8 3.26 3.71 4.16 4.61 5.49 6.8 8.92
28×28 2.63 3.14 3.66 4.17 4.67 5.18 6.18 7.66 10.06
30×30 2.82 3.37 3.92 4.47 5.02 5.56 6.64 8.23 10.82
36×23 2.77 2.31 3.86 4.4 4.93 5.46 6.52 8.08 10.63
36×36 3.39 4.06 4.72 5.38 6.04 6.7 8.01 9.94 13.1
38×38 4.99 5.69 6.39 7.08 8.46 10.51 13.86
40×40 5.26 5.99 6.73 7.46 8.92 11.08 14.63
48×23 4 4.66 5.31 5.96 6.61 7.89 9.8 12.91
48×48 6.32 7.21 8.1 8.98 10.75 13.37 17.67
50×50 6.59 7.52 8.44 9.37 11.2 13.94 18.43 22.85
20×10 1.12 1.39 1.66 1.92 2.19 2.45 2.71 3.21
25×13 1.42 1.77 2.12 2.46 2.8 3.13 3.47 4.12 5.09 6.63
30×15 2.1 2.52 2.92 3.33 3.73 4.13 4.92 6.09 7.97
38×25 3.54 4.12 4.7 5.27 5.84 6.98 8.66 11.39
40×10 2.8 3.26 3.71 4.16 4.61 5.49 6.8 8.92
40×20 3.37 3.92 4.47 5.02 5.56 6.64 8.23 10.82
50×25 4.23 4.92 5.61 6.3 6.99 8.35 10.37 13.67
60×30 5.92 6.76 7.59 8.41 10.06 12.51 16.53 20.47
75×45 7.92 9.04 10.16 11.27 13.49 16.79 22.24
55×13 3.83 4.46 5.08 5.7 6.32 7.55 9.37 12.34
60×40 6.59 7.52 8.44 9.37 11.2 13.94 18.43 22.85
60×60 7.92 9.04 10.16 11.27 13.49 16.79 22.24 27.61 32.91
70×30 6.59 7.52 8.44 9.37 11.2 13.94 18.43 22.85
73×43 7.65 8.73 9.81 10.89 13.03 16.22 21.48 26.66
80×40 10.16 11.27 13.49 16.79 22.24 27.61 32.91
80×60 11.87 13.17 15.77 19.64 26.04 32.37 38.62 50.89
80×80 13.58 15.07 18.05 22.5 29.85 37.13 44.33 58.5
95×45 11.87 13.17 15.77 19.64 26.04 32.37 38.62 50.89
100×40 13.17 15.77 19.64 26.04 32.37 38.62 50.89
100×50 14.12 16.91 21.07 27.95 34.75 41.47 54.7
120×60 20.34 25.35 33.66 41.88 50.04 66.12 81.9
150×100 35.34 46.98 58.53 70.02 92.76 115.2
100×100 22.62 28.21 37.46 46.64 55.74 73.73 91.41
150×150 42.48 56.52 70.43 84.29 111.79 138.99

Is Alloy20 a nickel-based alloy or stainless steel?

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Alloy20 (N08020) is an Austenitic nickel-iron-chromium-based superalloy with excellent resistance to total, intergranular, pitting and crevice corrosion in chemicals containing chlorides, sulfuric acid, phosphoric acid and nitric acid. Its corrosion resistance is good between 316L and Hastelloy, and it is not as good as 316L stainless steel in some amine solutions because it is easy to form nickel ammonium complexes.

In addition, it has a good cold forming and weldability even at up to 500℃. The low carbon content and the addition of niobium help to reduce the precipitation of carbides in the HEAT affected zone, so it can be used in the welded state in most cases.

For a long time, many people have been arguing: Is Alloy 20 a stainless steel or a nickel Alloy? Because their 32-38% nickel content is just close to 36%, the boundary between stainless steel and nickel-based alloys blurs the classification of materials. In general, it is true that alloy20 is a nickel alloy. The new edition of ASTM A240 includes alloy 20, which supports that alloys 20 have been classified as stainless steel from the side. Alloy20 plates are in accordance with ASTM B463, ASME SB463. The same materials as N08904 (904L), N08926(1.4529), etc., were early classified in the ASTM B nickel alloy standard series.

 

Alloy20 has the common characteristics of nickel alloy in terms of welding properties, that is, generally does not produce cold cracks when welding, and is more prone to produce hot cracks. Because of nickel and sulfur, phosphorus can form low melting eutectic, solidification often forms a thick dendritic austenite crystal, low melting point impurity is more likely to focus on grain boundary, the grain size and the effect of solidification shrinkage stress and welding stress, not entirely solidification grain boundary of low melting point material is easy to cracking formation of hot crack, so should strictly control the sulfur and phosphorus content of welding material.

Alloy 20 has excellent resistance to stress corrosion cracking, good resistance to local corrosion, satisfactory corrosion resistance in many chemical process media, chlorine gas and all kinds of media containing chloride, dry chlorine gas, formic and acetic acid, anhydride, seawater and saltwater, etc. At the same time, 20 alloy oxidation-reducing composite media corrosion, is often used in a sulfuric acid environment and containing halogen ions and metal ions sulfuric acid solution applications, such as hydrometallurgy and sulfuric acid industrial equipment.

First developed in 1951 for application in sulfuric acid, alloy 20 is the preferred alloy for sulfuric acid industrial environments. In 20% ~ 40% boiling sulfuric acid, it shows excellent resistance to stress corrosion cracking, and is an excellent material for many industries such as the chemical industry, food industry, pharmaceutical industry and plastics. It can be used in heat exchangers, mixing tanks, metal cleaning and pickling equipment and pipelines. Alloy 20 can also be applied in synthetic rubber manufacturing equipment, pharmaceuticals, plastics, organic and heavy chemical processing, storage tanks, pipes, heat exchangers, pumps, valves and other process equipment, pickling equipment, chemical process pipes, bubble caps, food and dye production is often used.

The theoretical weight of 304 stainless steel pipe elbow

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Stainless steel pipe fittings are extensively used in the manufacturing industries for its durability and cost-effectiveness. It has many advantages over the traditional pipe fittings that make it more preferable than any other. The cost-effectiveness of the alloy products greatly contributes to their wide application. Besides this, it helps in the maintenance of the pipe systems too. These are the main reasons why the 304 pipe fittings and accessories have become popular in the market. As the industry requires, the 304 pipe elbows made by the welded and seamless process can be easily found online. But before buying them, you must ensure their weight for your needs, because it will affect the cost of your shipping and transportation.

 

TP 304 Stainless steel elbow weight chart(Theoretical, kg)

DN O.D Radius Nominal wall thickness, T
NPS DN D R=1.5D SCH5s W SCH10s W SCH10 W SCH20 W SHC30 W SCH40s W STD W SCH40 W SCH60 W
1/2 15 21.3 38 1.7 0.05 2.11 0.06 2.11 0.06 2.41 0.07 2.77 0.08 2.77 0.08 2.77 0.08
3/4 20 26.7 38 1.7 0.06 2.11 0.08 2.11 0.08 2.41 0.09 2.87 0.10 2.87 0.10 2.87 0.10
1 25 33.4 38 1.7 0.08 2.77 0.13 2.77 0.13 2.9 0.13 3.38 0.15 3.38 0.15 3.38 0.15
1 1/4 32 42.2 48 1.7 0.13 2.77 0.20 2.77 0.20 2.97 0.22 3.56 0.26 3.56 0.26 3.56 0.26
1 1/2 40 48.3 57 1.7 0.17 2.77 0.28 2.77 0.28 3.18 0.32 3.68 0.37 3.68 0.37 3.68 0.37
2 50 60.3 76 1.7 0.29 2.77 0.47 2.77 0.47 3.18 0.54 3.91 0.66 3.91 0.66 3.91 0.66
2 1/2 65 73 95 2.1 0.56 3.05 0.79 3.05 0.79 4.78 1.21 5.16 1.30 5.16 1.30 5.16 1.30
3 80 88.9 114 2.1 0.82 3.05 1.17 3.05 1.17 4.78 1.79 5.49 2.04 5.49 2.04 5.49 2.04
3 1/2 90 101.6 133 2.1 1.09 3.05 1.56 3.05 1.56 4.78 2.41 5.74 2.86 5.74 2.86 5.74 2.86
4 100 114.3 152 2.1 1.41 3.05 2.02 3.05 2.02 4.78 3.11 6.02 3.87 6.02 3.87 6.02 3.87
5 125 141.3 190 2.8 2.85 3.4 3.48 3.4 3.48 6.55 6.56 6.55 6.56 6.55 6.56
6 150 168.3 229 2.8 4.11 3.4 5.02 3.4 5.02 7.11 10.26 7.11 10.26 7.11 10.26
8 200 219.1 305 2.8 7.15 3.76 9.66 3.76 9.66 6.35 16.11 7.04 17.80 8.18 20.58 8.18 20.58 8.18 20.58 10.31 25.67
10 250 273.1 381 3.4 13.66 4.19 16.79 4.19 16.79 6.35 25.23 7.8 30.83 9.27 36.43 9.27 36.43 9.27 36.43 12.7 49.27
12 300 323.9 457 4 22.64 4.57 26.08 4.57 26.08 6.35 36.03 8.38 47.25 9.53 53.53 9.53 53.53 10.31 57.77 14.27 78.95
14 350 355.6 533 4 29.02 4.78 34.95 6.35 46.22 7.92 57.39 9.53 68.73 9.53 68.73 11.13 79.90 15.09 107.08
16 400 406.4 610 4.2 40.20 4.78 45.79 6.35 60.59 7.92 75.27 9.53 90.21 9.53 90.21 12.7 119.25 16.66 154.87
18 450 457.2 686 4.2 50.91 4.78 58.01 6.35 76.79 7.92 95.44 11.13 133.17 9.53 114.43 14.27 169.54 19.05 223.88
20 500 508 762 4.8 71.67 5.54 82.94 6.35 94.91 9.53 141.53 12.7 187.41 9.53 141.53 15.09 221.61 20.62 299.43
22 550 558.8 838 4.8 86.77 5.54 100.43 6.35 114.94 9.53 171.51 12.7 227.25 9.53 171.51 22.23 390.83
24 600 609.6 914 5.5 119.59 6.35 136.90 6.35 136.90 9.53 204.37 14.27 303.60 9.53 204.37 17.48 369.89 24.61 514.50

 

What’s the duplex stainless steel used for?

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Duplex stainless steel refers to the stainless steel that have each 50% of ferrite and austenite , the general content of the less phase is at least 30%, it has both the characteristics of austenite and ferrite stainless steel. Compared with ferrite, it has higher plasticity, toughness, no room temperature brittleness, intergranular corrosion resistance and welding performance are significantly improved, also maintain the 475℃ brittleness of ferrite stainless steel and high thermal conductivity, superplasticity and other characteristics. Compared with austenitic stainless steels, dual-phase stainless steels have higher strength and higher resistance to intergranular corrosion and chloride stress corrosion. Duplex stainless steel is widely used in various applications because of its excellent comprehensive mechanical properties and resistance to chloride stress corrosion, papermaking industry, Chemical and petrochemical industries, Hydrometallurgy; Marine and coastal applications, plumbing installations for food and beverage plants, buildings, etc

Pulp and paper

Beginning in 1930, one of the first applications of duplex stainless steel was in the sulfite paper industry. Today, duplex stainless steel is used in the pulp and paper industry as bleaching equipment, digesters, chip storage tanks, black and white storage tanks, and suction roll housings. duplex stainless steels have high strength, excellent corrosion resistance, and the same pressure rating that allows for the use of thinner sheets, and have now replaced austenitic stainless steels and carbon steels in paper industry applications. It has lower composite material costs, shorter welding times, and lower transportation and handling costs.

 

Desalination

Due to the high chloride content, high-temperature corrosive process environment, seawater desalination subjected the material to one of the most stringent tests. Desalination customers need to strike a balance between meeting corrosion resistance requirements and keeping their investments affordable. In earlier desalination projects, the evaporators for the MSF and MED desalination plants were manufactured using carbon steel. Later, MSF evaporators are generally coated with 316L austenitic stainless steel. The MED evaporator is first coated with epoxy resin and then stainless steel.

The benefits of duplex stainless steel have high strength (twice that of conventional austenitic stainless steel) combined with high corrosion resistance. As a result, duplex stainless steel evaporators can be manufactured from thinner steel plates, requiring less material and welding. Other benefits include ease of handling and less overall impact on the environment. 2205 duplex stainless steel is used to manufacture bulk duplex steel evaporators. The Melittah MSF facility and the Zuara Med facility in Libya were installed to construct three sets of multistage flash MSF units using the concept of combining two duplex steel, 2205 and UNS S32101.

 

Oil and gas

In the oil and gas industry, duplex stainless steels play a vital role in helping to withstand harsh conditions. This is because its strength, pitting resistance and crevice corrosion resistance are better than standard austenitic stainless steels, and the pitting value (PREN) of dual-phase stainless steels is usually higher than 40. Duplex stainless steel is mainly used in fluid piping, process piping systems and equipment such as separators, scrubbing units and pumps. At sea area, these materials are used in downhole production pipes, fittings and assembly lines, production tree parts, fluid pipes and pipelines for transporting corrosive oil and gas. Super Duplex Stainless Steel (25% Cr) has high strength, excellent fatigue resistance and good coupling compatibility with other high alloy stainless steels.

 

Food and Beverages

Economic duplex steels have also proved their value in the food and beverage industry. The material is used in two projects in Spain, a food storage facility and a wine storage facility.

At the Port of Barcelona, Emypro SA built all the food storage tanks using S32101, replacing the EN304/304L. The wine storage warehouse for Garcia Carrion, built by Spanish tank manufacturer Martinez Sole in Demiere, southern Spain, was the first to use dual-phase stainless steel: The S32101 and 2304, as low-cost replacements for 304/316L, were used to build the roof and topmost roof for all new tanks.

 

Construction industry

Duplex steel plays an important role in the construction of Bridges that need high bearing strength when used in a corrosive and salt environment. The 2205 duplex stainless steel is used for the Stonecutters Bridge in Hong Kong and the Double Helix Walking Bridge in Singapore. In 2006, 2,000 tons of 2205 duplex steel sheets and pipes were used for the Stonecutters Island Bridge. The surface part of the bridge was constructed from custom-sized sheets by Chinese duplex stainless steel manufacturers. These stainless steel sheets are polished and shot-peened for optimum reflectance both day and night.

The world’s largest stainless steel roof at the new Doha International Airport in Qatar is constructed using an economical duplex stainless steel (S32003) containing molybdenum. The terminal’s most prominent feature is its wavy roof, which is said to be the largest stainless steel roof in the world. The roof covers about 195,000 square meters (2.1 million square feet) and uses about 1,600 tons (3.5 million pounds) of dual-phase stainless steel. Several factors must be considered in the choice of stainless steel grades, the most important of which is the distance between the airport and the sea. Not only must the roof resist the heat and humidity of the Middle East, but it must also withstand salt. Other factors for choosing Duplex Stainless steel include cost and a good strength-to-weight ratio when compared to other steels.

Warum ist Edelstahl 201 billiger als 304?

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201er Edelstahl ist ein relativ kostengünstiges Alternativmaterial zum traditionellen 304er Edelstahl. Der 201er Edelstahlblech hat gegenüber seinen Konkurrenten jedoch einige Vorteile: Er enthält weniger Cr- und Nickelanteile, was zu weniger Verschwendung bei der Herstellung von Verbindungen führt und die Produktionskosten senkt. Dennoch verliert der Edelstahlblech bei Vergleich mit 304er Edelstahl an Härte und Dehnbarkeit.

Das Edelstahlblech aus 201 rostfreiem Stahl enthält etwa die Hälfte des Nickelgehalts wie das aus Edelstahl 304. Stattdessen wird Wolfram durch verschiedene Legierungszusätze aus Stickstoff und Mangan ersetzt. Es ist möglich, dass der gesamte Beitrag dieser Legierungsbestandteile nicht das Gesamtgehalt an Nickel entspricht, aber sie tragen sicherlich eine ziemlich signifikante Rolle bei. Der Nachteil dieses Materials besteht darin, dass der folgende Chromgehalt von 18% und der niedrige Nickelgehalt nicht das Gleichgewicht erreichen und zu Ferrit führen können, weshalb der Chromgehalt in Edelstahl 201 auf 13,5% bis 15%, in manchen Fällen sogar auf 13% bis 14% sinkt, was die Korrosionsbeständigkeit nicht mit dem von 304 und anderen ähnlichen Stählen vergleichbar macht. Darüber hinaus reduzieren Mangan und in manchen Fällen Kupfer die Wahrscheinlichkeit einer erneuten Passivierung unter sauren Bedingungen, die in den Korrosionsbereichen von Ablagerungen und Spalten häufig vorkommen. Die Zerstörungstemperatur von 201-Stahl bei diesen Bedingungen beträgt etwa 10-100 Mal so viel wie bei 304-Edelstahl. Der Restgehalt an Schwefel und Kohlenstoff in Stahl wird während der Produktion oft nicht kontrolliert, selbst bei der Materialrückgewinnung.

Die wesentliche Veränderung in der Zusammensetzung dieser Edelstahllegierungen ist die Substitution des Stickstoffs durch Mangan. Der Nickelgehalt wird von etwa 20 % in dem Fall von 201 auf nur 7 in % dem Fall von 304 Edelstahl reduziert. Dies ist hauptsächlich darauf zurückzuführen, dass der Wolfram durch Mangan ersetzt wird. Es gibt außerdem einige weitere Vorteile, die berücksichtigt werden können: Die Kombination beider Nachteile führt zu einem sehr effektiven Allround-Edelstahl.

Die nächste Alternative zu rostfreiem Stahl, die in den letzten Jahren auf den Markt gekommen ist, besteht darin, Kohlenstoff anstelle von Stickstoff zu verwenden. Kohlenstoff ist extrem strapazierfähig und langlebig. Viele der neuen Geräte, die auf den Markt kommen, verwenden Kohlenstoff anstelle von Nickel, und das nur aus diesem Grund. Kohlenstoff erhöht außerdem die Weichheit der Legierung, und diese kann in Haushaltsgeräten eingesetzt werden, die viel Strom verbrauchen, wie beispielsweise Öfen und Mikrowellen. Die Erhöhung der Weichheit kann auch die Leistung dieser Haushaltsgeräte erheblich verbessern.

Die gesamte Zusammensetzung des 201-Edelstahls ändert sich, wenn der Kohlenstoff durch Mangan ersetzt wird. Dies macht die Legierung härter, stärker und auch korrosionsbeständiger. Die physikalischen Eigenschaften dieser Legierung verbessern sich durch die Verbesserung der mechanischen Eigenschaften und die Verbesserung der Wärmeleitfähigkeit. Wie wir sehen können, passt die Kombination dieser beiden perfekt zusammen. Wenn Sie nach einem brandneuen Küchenset suchen oder die Küchenutensilien Ihrer Küche ersetzen möchten, wäre die beste Option, sich für den 201-Edelstahl zu entscheiden. Wir haben uns einen hervorragenden Ruf für die Lieferung von Edelstahlprodukten wie 201, 304, 316 und anderen Produkten erworben. Bei der Eröffnung eines neuen Stahlprojekts ist es wichtig, auf ein hochwertiges Produkt zu achten.

Austenitische hitzebeständige Edelstahl

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309 and 310 stainless sheets of steel are heat-resistant austenitic steels characterized by high Cr and Ni content. 309S and 310S are their low carbon versions respectively. In oxidizing media, they both have excellent corrosion resistance and high-temperature strength. At room temperature, the matrix microstructure of austenitic stainless steel 310 is pure γ. 310 is also known as “2520 stainless steel” because it contains 25% chromium and 20% nickel, respectively. 310S and 309S are not easy to oxidize at high temperature and are commonly used high-temperature resistance grades. The experimental results show that the oxidation rate of 310 is slow when the temperature is less than 1000℃. As the temperature continues to rise to 1200℃, the degree of oxidation of 310 accelerates rapidly. In addition, they are also used in the transport and storage of strong acids such as nitric acid with a concentration of 65% ~ 85%.

 

Alternative material in other standards:

JIS G4303 SUS 309S, SUS 310S

EN 10088-1 X12CrNi23-13/ 1.4833, X15CrNiSi25-21/1.4841, X8CrNi25-21/ 1.4845

 

Chemical Composition

ASTM 309 309S 310 310S
C ≤0.20 ≤0.08 ≤0.25 ≤0.08
Si ≤1.00 ≤1.00 ≤1.50 ≤1.50
Mn ≤2.00 ≤2.00 ≤2.00 ≤2.00
P ≤0.045 ≤0.045 ≤0.045 ≤0.045
S ≤0.030 ≤0.030 ≤0.030 ≤0.030
Cr 22.00~24.00 22.00~24.00 24.00~26.00 24.00~26.00
Ni 12.00~15.00 12.00~15.00 19.00~22.00 19.00~22.00

Under the high temperature condition, 310 heat resistant stainless steel can keep the performance is stable, not easy to be corroded and oxidized by the outside. This is mainly due to the high Cr content in 310 stainless steel itself, metal Cr can combine with oxygen to form Cr2O3 oxide film, which constantly covers the surface of 310 steel until all the package, equivalent to 310 steel put on the “protective clothing”, which can prevent the internal 310 metal contact with the outside world, This is the main reason why 310 steel can have good oxidation resistance at high temperature.

For heat-resistant stainless steel, the chromium (Cr) element is stable at high temperature, does not occur oxidation and falls off. But the content of Cr can not be too high, otherwise, the toughness of stainless steel will also decline because Cr can promote the emergence of α composition and inhibit γ, too much α is easy to lead to the generation of brittle phase. Therefore, in austenitic stainless steel, we hope that the content of Cr remains moderate, which can not only ensure the performance of the material in all aspects but also prevent the emergence of some brittle phases.

Nickel is a very important element in heat-resistant austenitic stainless steel and plays an active role in promoting the formation of γ. The increase of Ni content can make the transition temperature from γ to αphase become very low, which can enhance the stability of the austenite matrix. In addition, appropriate Ni content can obviously improve the overall mechanical properties and good welding properties of stainless steel.