Stainless steel pipe is a kind of hollow long round steel, which is mainly widely used in industrial transportation pipelines and mechanical structural components such as petroleum, chemical industry, medical treatment, food, light industry, mechanical instrumentation, etc. In addition, when the bending and torsional strength are the same, the weight is lighter, so it is also widely used in manufacturing mechanical parts and engineering structures. It is also commonly used as furniture, kitchen utensils, etc.
hardness
Stainless steel pipes generally use three hardness indicators: Brinell, Rockwell, and Vickers to measure their hardness.
Brinell hardness
Among stainless steel pipe standards, Brinell hardness is the most widely used. The indentation diameter is often used to express the hardness of the material, which is both intuitive and convenient. But it is not suitable for steel pipes made of harder or thinner steel.
Rockwell hardness
The Rockwell hardness test of stainless steel pipe is the same as the Brinell hardness test, which is an indentation test method. The difference is that it measures the depth of the indentation. Rockwell hardness test is currently a widely used method, among which HRC is used in steel pipe standards second only to Brinell hardness HB. Rockwell hardness can be used to measure metal materials from extremely soft to extremely hard. It makes up for the shortcomings of the Brinell method. It is simpler than the Brinell method and the hardness value can be read directly from the dial of the hardness machine. However, due to its small indentation, the hardness value is not as accurate as the Brinell method.
Vickers hardness
The Vickers hardness test of stainless steel pipe is also an indentation test method that can be used to determine the hardness of very thin metal materials and surface layers. It has the main advantages of Brinell and Rockwell methods and overcomes their basic shortcomings, but it is not as simple as Rockwell method. Vickers method is rarely used in steel pipe standards.
Hardness testing
For annealed stainless steel pipes with an inner diameter of more than 6.0 mm and a wall thickness of less than 13 mm, the W-B75 Webster hardness tester can be used. The test is very fast and simple, and is suitable for rapid and non-destructive qualification inspection of stainless steel pipes. For stainless steel pipes with an inner diameter greater than 30mm and a wall thickness greater than 1.2mm, use a Rockwell hardness tester to test HRB and HRC hardness. For stainless steel pipes with an inner diameter greater than 30mm and a wall thickness less than 1.2mm, use a surface Rockwell hardness tester to test the HRT or HRN hardness. For stainless steel pipes with an inner diameter less than 0mm and greater than 4.8mm, use a special Rockwell hardness tester for pipes to test the HR15T hardness. When the inner diameter of the stainless steel pipe is greater than 26mm, the hardness of the inner wall of the pipe can also be tested with a Rockwell or surface Rockwell hardness tester.
Stainless steel pipe is a relatively common type of pipe in engineering, and the commonly used materials are 201 and 304. It has irreplaceable advantages for other pipeline materials, and is increasingly used in engineering, with very broad prospects.
In some cases, stainless steel pipes have their own unique advantages, especially thin-walled stainless steel pipes with a wall thickness of only 0.61.2mm. They are widely used in high-quality drinking water systems that put safety and hygiene first. , the steel pipes used in hot water systems and water supply systems need to be safe, reliable, hygienic, environmentally friendly, economical and practical. It has been proven by domestic and foreign engineering practices that stainless steel pipes are one of the new energy-saving and environmentally friendly pipes with the best comprehensive performance in water supply systems.
Types and uses of stainless steel pipes:
1. Stainless steel decorative pipe
1. Material: mainly 201 and 304, a small amount of 301 and 316.
2. Usage: Mainly used in decoration projects such as stairs, doors, windows, guardrails, etc., and some product pipelines with lower requirements.
3. Features: bright surface, brushed or frosted.
2. Stainless steel special-shaped pipes
Usually, when the quantity of special-shaped pipes is small, the round pipes are formed from secondary pressure pipes (except grooved pipes), and large quantities can be customized. Due to different specifications and sometimes lack of molds, you may need to bear the corresponding mold costs.
1. Oval tube: ordinary oval tube, flat oval tube.
2. Slotted tubes: round tubes, square tubes, rectangular tubes, oval tubes, etc. that can be grooved, generally used for guardrail frame glass.
3. Others: triangle, handrail, arch, fan, door frame tube, etc.
3. Stainless steel pattern pipe
The appearance of pattern tubes changes the cookie-cutter appearance of traditional stainless steel tubes, which is refreshing. Recently, many pipe factories have begun to produce patterned stainless steel pipes.
1. Ordinary embossing: traditional round tube pressed gourd pattern.
2. European embossing: Press the surface of the tube back into shape to form patterns such as auspicious clouds and money.
4. Stainless steel industrial pipes
Industrial pipes also include welded pipes and seamless pipes, which are mainly used in engineering structures, various types of pipes, etc.
According to the state of the pipe end, stainless steel pipes can be divided into smooth pipes and threaded pipes (threaded steel pipes). Threaded pipes can be divided into ordinary threaded pipes (pipes used to transport water, gas and other low pressures, connected by ordinary cylindrical pipes or tapered pipes) and special threaded pipes (pipes used for oil and geological drilling). For important threaded pipes, please use special threaded connections. For some special pipes, in order to compensate for the effect of threads on the strength of the pipe end, the pipe end is usually thickened (internal thickening, external thickening or both internal and external thickening) before rotating the wire.
Stainless steel pipe is a kind of hollow oblong steel that is widely used in petroleum, chemical industry, medical, food, light industry, machinery and instrumentation, and other industrial pipes and mechanical structural parts. In addition, when the bending and torsion strengths are the same, the weight is lighter, so it is also widely used in the manufacturing of mechanical parts and various engineering.
Zhengde Stainless steel pipe is a common metal pipe made of stainless steel. Stainless steel pipes can be divided into multiple types according to different classification standards and uses. The following will introduce in detail the classification and uses of stainless steel pipes.
1. Classification of stainless steel pipes
1. Classification by material:
Stainless steel pipes can be divided into many types according to different materials, such as 304 stainless steel pipes, 316 stainless steel pipes, etc. Among them, 304 stainless steel pipe has good corrosion resistance and processing performance, and is widely used in petroleum, chemical, pharmaceutical, food and other industries; 316 stainless steel pipe has good corrosion resistance in environments containing strong corrosive media such as acids and alkalis. performance, often used in marine engineering, chemical equipment and other fields.
2. Classification by appearance:
There are many shapes of stainless steel pipes, such as round stainless steel pipes, square stainless steel pipes, rectangular stainless steel pipes, etc. Round stainless steel pipes are the most common type and are widely used in construction, machinery and other fields; square stainless steel pipes and rectangular stainless steel pipes are often used in making furniture, decoration, etc.
3. Classification by manufacturing process:
Stainless steel pipes can be divided into seamless stainless steel pipes and welded stainless steel pipes according to different manufacturing processes. Seamless stainless steel pipes have a complex manufacturing process and have excellent high-pressure resistance and are often used in petroleum, chemical and other fields; welded stainless steel pipes have a simple manufacturing process and low cost, and are widely used in construction, decoration and other fields.
2. Uses of stainless steel pipes
1. Petroleum and chemical industry:
Stainless steel pipes are widely used in petroleum, chemical and other industries. Because stainless steel has corrosion resistance, high temperature resistance and other properties, it is suitable for transporting various media, so it is often used in petroleum pipelines, chemical equipment, etc.
2. Construction field:
Stainless steel pipes are increasingly used in the construction field. Stainless steel pipes are beautiful and corrosion-resistant and are often used to make railings, stair handrails, indoor and outdoor decorations, etc.
3. Machinery manufacturing:
Stainless steel pipes also have important applications in the field of machinery manufacturing. Stainless steel pipes have excellent wear resistance and corrosion resistance and are suitable for making bearings, gears, auto parts, etc.
4. Food industry:
Stainless steel pipes play an important role in the food industry. Stainless steel pipes are resistant to high temperatures and easy to clean, and are often used in food processing equipment, hotel kitchens, etc.
5. Pharmaceutical industry:
Stainless steel tubes are widely used in the pharmaceutical industry. Stainless steel pipes are corrosion-resistant, non-toxic and odorless, and are often used to make medical equipment, pharmaceutical containers, etc.
6. Other areas:
Stainless steel pipes are also widely used in aviation, aerospace, electric power, textile and other fields. Stainless steel pipes have the characteristics of high temperature resistance and oxidation resistance, and are suitable for various special environments.
| No. |
GB |
CNS |
JIS |
KS |
IS |
ASTM |
UNS |
CSA |
DGN |
AS |
| 1 |
1Cr17Mn6nNi5N |
201 |
SUS201 |
STS201 |
10Cr17Mn6Ni4N-20 |
201 |
S20100 |
201 |
- |
201-2 |
| 2 |
1Cr18Mn8Ni5N |
202 |
SUS202 |
STS202 |
|
202 |
S20200 |
202 |
- |
- |
| 3 |
1Cr17Ni7 |
301 |
SUS301 |
STS301 |
10Cr17Ni7 |
301 |
S30100 |
301 |
- |
301 |
| 4 |
1Cr18Ni9 |
302 |
SUS302 |
STS302 |
- |
302 |
S30200 |
302 |
302 |
302 |
| 5 |
Y1Cr18Ni9 |
303 |
SUS303 |
STS303 |
- |
303 |
S30300 |
303 |
302 |
303 |
| 6 |
Y1Cr18Ni9Se |
303Se |
SUS303Se |
STS303Se |
- |
303Se |
S30323 |
303Se |
303Se |
- |
| 7 |
0Cr19Ni19 |
304 |
SUS304 |
SS304 |
07Cr18Ni9 |
304 |
S30400 |
304 |
304 |
304 |
| 0Cr18Ni19 |
304H |
| 8 |
00Cr19Ni10 |
304L |
SUS304L |
STS304L |
02Cr18nIl1 |
304L |
S30403 |
304L |
|
304L |
| 00Cr18Ni19 |
| 9 |
0Cr19Ni19N |
304N1 |
SUS304N1 |
STS304N1 |
- |
304N |
S30454 |
- |
- |
- |
| 10 |
0Cr19Ni10NbN |
304N2 |
SUS304N2 |
STS304N2 |
- |
XM21 |
S30452 |
- |
- |
- |
| 11 |
00Cr18Ni10N |
304LN |
SUS304LN |
STS304LN |
- |
304LN |
S30453 |
- |
- |
- |
| 12 |
1Cr18Ni12 |
305 |
SUS305 |
STS305 |
- |
305 |
S30500 |
305 |
305 |
- |
| 1Cr18Ni12Ti |
| 13 |
0Cr23Ni13 |
309S |
SUS309S |
STS309S |
- |
309S |
S30908 |
309S |
309S |
- |
| 14 |
0Cr25Ni20 |
310S |
SUS310S |
STS310S |
- |
310S |
S31008 |
310S |
310S |
310S |
| 1Cr18Ni12Ti |
| 15 |
0Cr17Ni12Mo2 |
316 |
SUS316 |
STS316 |
04Cr17Ni12Mo2 |
316 |
S31600 |
316 |
316 |
316 |
| 16 |
0Cr18Ni12Mo2Ti |
|
|
- |
04Cr17Ni12MoTi-20 |
316Ti |
S31615 |
- |
- |
316Ti |
| 17 |
00Cr17Ni14Mo2 |
316L |
STS316L |
STS316L |
~02Cr17Ni12Mo2 |
316l |
S31651 |
- |
- |
- |
| 18 |
00Cr17Ni12Mo2N |
316N |
SUS316N |
STS316N |
- |
316N |
S31651 |
- |
- |
- |
| 19 |
00Cr17Ni13Mo2N |
316LN |
SUS316LN |
STS316LN |
- |
316LN |
S31653 |
- |
- |
- |
| 20 |
0Cr18Ni12Mo2Cu2 |
316J1 |
SUSJ1 |
STS316J1 |
- |
- |
- |
- |
- |
- |
| 21 |
00Cr18Ni14Mo2Cu2 |
316J1L |
SUS316J1L |
ST316J1L |
- |
- |
- |
- |
- |
- |
| 22 |
0Cr19Ni13Mo3 |
317 |
SUS317 |
STS317 |
- |
317 |
S31700 |
317 |
317 |
317 |
| 23 |
1Cr18Ni12Mo3Ti |
|
- |
- |
- |
- |
- |
- |
- |
- |
| 24 |
0Cr18Ni12Mo3Ti |
|
- |
- |
- |
- |
- |
- |
- |
- |
| 25 |
00Cr19Ni13Mo3 |
317L |
SUS317L |
STS317L |
- |
317L |
S31703 |
317L |
- |
- |
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Quality first: production and inspection in strict accordance with production standards;
Price advantage: discounts based on real market prices;
Transaction security: There will be no loss of customer funds;
After-sales guarantee: the customer's problem is our problem;
Long-term cooperation: quality assurance, price advantage, sincere service can last for a long time.
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Company Profile
Shandong Zhengde Metal Manufacturing Co., Ltd. is a company integrating hot-rolled steel coils, cold-rolled steel coils, galvanized steel coils, color-coated steel coils, steel sections, steel pipes, heat exchange pipes, automobile exhaust pipes, anchor rods, steel wires, metal mesh, A large comprehensive enterprise of metal products including stainless steel, aluminum, copper, metal raw material billets, aluminum ingots, zinc ingots, magnesium ingots, lead ingots, etc. It has formed five production and sales bases in Binzhou, Liaocheng, Wuxi, Tianjin, Jinan and Tai′an, with more than 100 production lines, 4 nationally recognized laboratories, 2 technical engineering centers and 5 corporate technology centers. The products are exported to more than 50 countries and regions in the world, including North America, South America, Europe, the Middle East, Russia, Africa, and North America.
Company Philosophy:
Quality first: production and inspection in strict accordance with production standards;
Price advantage: discounts based on real market prices;
Transaction security: There will be no loss of customer funds;
After-sales guarantee: the customer's problem is our problem;
Long-term cooperation: quality assurance, price advantage, sincere service can last for a long time.
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