310 stainless steel pipes are essential components in various industries due to their outstanding resistance to high temperatures and corrosion.
310 stainless steel pipes are essential components in various industries due to their outstanding resistance to high temperatures and corrosion. Here is a detailed introduction covering their chemical composition, mechanical properties, standards, popular grades, and frequently asked questions:
I. Overview
310 stainless steel pipes are engineered to perform in demanding environments where exposure to high temperatures, corrosive chemicals, and extreme conditions is common. Their unique alloy composition endows them with excellent durability and reliability, making them a preferred choice in sectors such as petrochemical, power generation, aerospace, and heat treatment. These pipes can be used for transporting high-temperature gases, corrosive fluids, or as structural elements in high-temperature equipment.
II. Chemical Composition
The chemical makeup of 310 stainless steel pipes is crucial for their exceptional performance characteristics. The following table details the main elements and their functions:
| Element | Content Range (%) | Role |
|---|---|---|
| Carbon (C) | ≤0.25 | Contributes to the pipe's strength. However, higher carbon levels can increase the risk of carbide precipitation during welding, potentially affecting corrosion resistance. |
| Chromium (Cr) | 24.0 - 26.0 | Forms a passive oxide layer on the surface of the pipe, providing excellent resistance to oxidation and corrosion. This layer acts as a protective barrier, preventing the underlying metal from reacting with the environment. |
| Nickel (Ni) | 19.0 - 22.0 | Enhances the pipe's ductility, toughness, and resistance to reducing environments. It also helps maintain the austenitic structure of the steel, which is beneficial for formability and strength. |
| Manganese (Mn) | ≤2.0 | Functions as a deoxidizer and also contributes to the overall strength of the steel. It can partially substitute for nickel in stabilizing the austenitic structure. |
| Silicon (Si) | ≤1.5 | Improves the pipe's resistance to high-temperature scaling, enabling it to withstand harsh thermal conditions without significant degradation. |
| Phosphorus (P) | ≤0.045 | An impurity that, if present in excessive amounts, can reduce the pipe's impact toughness and cause brittleness, especially at low temperatures. |
| Sulfur (S) | ≤0.030 | Another impurity that can negatively affect the pipe's hot-working performance, leading to issues such as hot shortness during manufacturing processes. |
III. Mechanical Properties
The mechanical properties of 310 stainless steel pipes determine their ability to withstand various stresses and loads in different applications. The following table outlines the key mechanical properties:
| Property | Value | Significance |
|---|---|---|
| Tensile Strength (MPa) | ≥520 | Indicates the maximum stress the pipe can endure before breaking under tension. High tensile strength is essential for pipes that carry high-pressure fluids or gases. |
| Yield Strength (MPa) | ≥205 | Represents the stress at which the pipe begins to deform plastically. This property is crucial for ensuring dimensional stability and preventing permanent deformation under normal operating conditions. |
| Elongation at Break (%) | ≥40 | Measures the pipe's ability to deform before fracturing. Good elongation allows for easier forming and bending during manufacturing and installation processes without cracking. |
| Hardness (HB) | ≤187 | A relatively low hardness value provides a good balance between workability and strength, making the pipe suitable for various machining and fabrication operations. |
IV. Standard Specifications of Corresponding Countries
310 stainless steel pipes are manufactured and regulated according to specific standards in different countries and regions. These standards ensure consistent quality, safety, and performance. The following table lists some of the prominent standards:
| Country/Region | Standard |
|---|---|
| United States | ASTM A312/A312M - 22 (for seamless and welded austenitic stainless steel pipes) ASTM A213/A213M - 22 (for seamless ferritic and austenitic alloy - steel boiler, superheater, and heat - exchanger tubes) |
| European Union | EN 10216 - 5:2014 (seamless steel tubes for pressure purposes, austenitic - ferritic (duplex) stainless - steel) EN 10217 - 7:2016 (welded steel tubes for pressure purposes, austenitic stainless - steel) |
| China | GB/T 14976 - 2012 (seamless stainless steel pipes for fluid transportation) GB/T 12771 - 2008 (welded stainless steel pipes for fluid transportation) |
V. Popular Grades
310S (06Cr25Ni20): This low-carbon variant of 310 stainless steel is highly popular due to its improved welding characteristics. The reduced carbon content (≤0.08%) minimizes the risk of carbide precipitation during welding, which can otherwise lead to intergranular corrosion. 310S stainless steel pipes are commonly used in applications where welding is involved, such as in the construction of furnace components, heat treatment equipment, and exhaust systems. Their enhanced corrosion resistance and good high-temperature performance make them a reliable choice for continuous service at elevated temperatures.
310H (07Cr25Ni20): With a higher carbon content (0.04 - 0.10%) compared to 310S, 310H stainless steel pipes offer increased strength and creep resistance at high temperatures. This grade is specifically designed for applications that require long-term exposure to elevated temperatures, such as in boiler tubes, high-temperature furnace pipes, and components in power generation plants. The higher carbon content helps the pipes maintain their mechanical properties over extended periods under thermal stress, ensuring the integrity and performance of the overall system.
VI. Popular Questions and Answers
Q: Can 310 stainless steel pipes be used for transporting drinking water?
A: While 310 stainless steel has good corrosion resistance, it is not typically the best choice for drinking water transportation. Its relatively high carbon content and the specific alloy composition are optimized for high-temperature and corrosive industrial applications rather than meeting the strict hygiene and corrosion-resistance requirements for potable water. Grades like 304 or 316 stainless steel, which have lower carbon content and better resistance to common water - borne chemicals and bacteria, are more commonly used for drinking water systems. However, if 310 stainless steel pipes are properly passivated and meet relevant drinking water safety standards, they can be used in some specialized cases, but it is not a common practice.
Q: How do you install 310 stainless steel pipes in high-temperature applications?
A: When installing 310 stainless steel pipes in high-temperature applications, proper preparation and techniques are essential. First, ensure that the pipes and fittings are clean and free from contaminants. Welding is a common method of joining, but it should be carried out using appropriate low-carbon filler materials (especially for 310S grade) to minimize the risk of carbide precipitation. Preheating the pipes before welding and performing post-weld heat treatment can also help reduce residual stresses and improve the overall integrity of the joint. Additionally, use high-temperature-resistant gaskets and insulation materials to prevent heat loss and ensure the safety of the installation. Secure the pipes with appropriate supports and hangers designed to withstand high temperatures and thermal expansion.
Q: What maintenance is required for 310 stainless steel pipes?
A: 310 stainless steel pipes generally require minimal maintenance due to their excellent corrosion and high-temperature resistance. Regular visual inspections should be conducted to check for signs of corrosion, cracks, or deformation. In cases where the pipes are exposed to harsh chemicals or environments, periodic cleaning with non-abrasive cleaners can help remove any accumulated deposits or contaminants. If the pipes are used in high-temperature applications, monitor for any signs of scaling or oxidation on the surface. In some cases, a protective coating or inhibitor may be applied to further enhance the pipe's performance and lifespan. Additionally, ensure that any joints or connections remain tight and free from leaks to maintain the integrity of the piping system.
| STS | USA | UNS | CHINA | EURONORM | RUSSIA | SWEDISH | JAPANESE | |
|---|---|---|---|---|---|---|---|---|
| GRADE | AISI/ASTM | NO | GB | NO | NAME | GOST | SS | JIS |
| 201 | 201 | S20100 | 12Cr17Mn6Ni5N | 1.4372 | - | - | - | SUS 201 |
| 301 | 301 | S30100 | 12Cr17Ni7 | 1.4310 | X 12 CrNi 17 7 | - | 2331 | SUS 301 |
| 303 | 303 | S30300 | 1Cr18Ni9MoZr | 1.4305 | X 10 CrNiS 18 9 | - | 2346 | SUS 303 |
| 304 | 304 | S30400 | 06Cr18Ni9 | 1.4301 | X 6 CrNi 18 10 | 08KH18N10 06KH18N11 |
2332 | SUS 304 |
| 304L | 304L | S30403 | 022Cr19Ni10 | 1.4307 | X 3 CrNi 18 10 | 03KH18N11 | 2352 | SUS 304L |
| 316 | 316 | S31600 | 0Cr17Ni12Mo2 | 1.4401 | X 6 CrNiMo 17 12 2 | - | 2347 | SUS 316 |
| 316L | 316L | S31603 | 022Cr17Ni12Mo2 | 1.4404 | X 3 CrNiMo 17 12 2 | - | 2348 | SUS 316L |
| 316Ti | 316Ti | S31635 | 0Cr18Ni12Mo2Ti | 1.4571 | X 6 CrNiMoTi 17 12 2 | 08KH17N13M2T 10KH17N13M2T |
2350 | - |
| 321 | 321 | S32100 | 0Cr18Ni11Ti | 1.4541/1.4878 | X 6 CrNiTi 18 10 | 12KH18N10T | 2337 | SUS 321 |
| 347 | 347 | S34709 | 0Cr18Ni11Nb | 1.4550 | X 6 CrNiNb 18 10 | - | 2338 | SUS 347 |
| 309S | 309S | S30908 | 0Cr23N13 | 1.4833 | X 6 CrNi 22 13 | 20KH23N18 | - | SUS 309S |
| 310S | 310S | S31008 | 06Cr25Ni20 | 1.4842 | X 6 CrNi 25 20 | 20KH25N20S2 | 2361 | SUS 310S |
| 416 | 416 | S41600 | Y1Cr13 | 1.4005 | X12CrS13 | - | 2380 | SUS 416 |
| 2205 | 2205 | S32205/S31803 | 00Cr22Ni5Mo3N | 1.4462 | X2CrNiMoN22-5-3 | 02Ch22N5AM2 | 2377 | SUS 329J3L |
| 2507 | 2507 | S32750 | 00Cr25Ni7Mo4N | 1.4410 | X 2 CrNiMoN 25-7-4 | - | - | - |
| 904L | 904L | N08904 | - | 1.4539 | - | - | - | - |
| 254SMO | 254SMO | S31254 | - | 1.4547 | X1CrNiMoCuN20-18-7 | - | 2378 | - |
| 253MA | 253MA | S30815 | - | 1.4835 | X9CrNiSiNCe21-11-2 | - | 2368 | - |
| 17-4PH/630 | 17-4PH/630 | S17400 | 0Cr17Ni4Cu4Nb | 1.4542 | X5CrNiCuNb16-4 | 05Ch16N4D2B | - | SUS630 |
It is our pleasure to answer your queries related to your business and requirements. Our will always be behind you and good cooperative partner in China for your business.
Share your needs with us, We'll contact you in very short time.
Products
Phone
