| After-sales Service: | Yes |
|---|---|
| Warranty: | Yes |
| Type: | Seamless |
| Technique: | Hot Rolled |
| Material: | Stainless Steel |
| Surface Treatment: | Polished |
| Samples: |
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Audited Supplier Introduction
A 321 Stainless Steel Pipe is stabilized by titanium and designed with a chemical composition of 17 to 19% chromium with 9 to 12% of nickel. These pipes show enhanced corrosion and oxidation resistance across stress-induced environments. The 321 SS Pipe is not sensitive to intergranular corrosion when they are heated within a carbide precipitation range of between 425 to 850 degrees C. These pipes are a good choice in applications in temperature range about 900 degrees C. 1.4541 Pipe combines high-strength with resistance to aqueous corrosion media. The pipes possess a minimum tensile strength of 515mpa with a minimum yield strength of 205mpa. These pipes can be easily elongated by 40%. The 321 Stainless Steel Tubing has a density of 8.0 kg/cm3 with a hardness of Brinell 217max. This tubing can be solution treated or annealed by heating it at temperatures of 950 to 1120 degrees C followed by rapid cooling thereby, improving its strength and corrosion resistance properties. The piping components in the Stainless steel 321 grade are produced in seamless and welded configurations. In the Stainless Steel 321 Seamless Pipe hot steel billets are used to create an opening to precisely shape the grade. The pipes are expensive due to the special equipment required in shaping them, but they possess outstanding strength and load-bearing capacity. On the contrary, a Stainless Steel 321 Welded Pipe is manufactured by welding pieces of sheets or strips to form a pipe grade. The low-cost pipe grades are a feature in moderate and low-pressure applications. Unlike seamless pipes, a welded pipe can be designed in customized shapes to fulfill different project needs. ASTM A312 TP 321 is a grade that covers seamless pipe grades for non-pressurized applications.
Heat-resisting alloy, Grade 321 belongs to the austenitic class of stainless steel. The chemistry of both stainless steel grade 304 and Stainless Steel 321 Seamless Pipe are similar. The dissimilarity between them lies in the fact that grade 321 has approximately five times more titanium than the content of carbon in alloy 304. By adding titanium to the alloy, the rate of carbide precipitation in ASTM A312 TP 321 ERW Pipe effectively diminishes, especially during welding operations.
Moreover, the rate of decay in the alloy is also reduced even if the SS 321 Welded Pipe has been exposed to a temperature range as high as 800°F to 1500°F. Like most austenitic stainless steel alloys belonging to the 300 series, the content of carbon in the alloy of a UNS S32100 schedule 40 pipe could be increased. While the effect is similar to that of its other austenitic stainless steel counterparts, the mechanical properties of this particular alloy become significantly higher. For one, the creep resisting properties of the ASME SA 312 Grade 321H Square Pipe see an increase.
In comparison to both grades 304 and grade 304L, the stress rupture properties as well as, the low-temperature toughness of the 321/321H Stainless Steel Round Pipe are much higher. Dual certification is possible for both grade 321 and 321H, due to its carbon content. The oxidation resistance of DIN 1.4541 Rectangular Pipe is highly appreciated as it can withstand an elevated temperature of 1500°F, without becoming prone to decay by oxidation.
ASTM A312 TP321 Chemical Composition
| A312 GRADES | UNS | C | Mn | P | S | Si | Cr | Ni | Mo | Ti | Nb | N |
|---|---|---|---|---|---|---|---|---|---|---|---|---|
| TP321 | S3210 | 0.08 | 2.0 | 0.045 | 0.030 | 1.0 | 17.0-19.0 | 9.0-12.0 | 0.10 |
| ASTM A312 Stainless Steel Pipes Mechanical Properties | |||||
| Material | Heat Treatment |
Temperure Min. º F(º C) |
Tensile Strength Ksi (MPa), Min. |
Yield Strength Ksi (MPa), Min. |
Elongation %, Min |
| TP321 | Solution | 1900(1040) | 75(515) | 30(205) | 35 |
| NPS | ASTM A312 TP321 OD Tolerance | |||
| + | - | |||
| inch | mm | inch | mm | |
| 1/8~1 1 /2 > 1 1 /2~4 > 4~8 > 8~18 > 18~26 > 26~34 > 34~48 |
1/64(0.015) 1/32(0.031) 1/16(0.062) 3/32(0.093) 1/8(0.125) 5/32(0.156) 3/16(0.187) |
0.4 0.8 1.6 2.4 3.2 4.0 4.8 |
1/32(0.031) 1/32(0.031) 1/32(0.031) 1/32(0.031) 1/32(0.031) 1/32(0.031) 1/32(0.031) |
0.8 0.8 0.8 0.8 0.8 0.8 0.8 |
1. Cutting and turning of steel material: First of all, cutting and turning of steel material, replacing the size, and finally cutting out the steel material
To determine the size of the steel used in the process.
2. Change the structure of the steel material: what needs to be done here is to change the structure of the steel material after appropriate heat treatment
Structure to ensure the correct volume of the product after the cold rolling process.
3.cold pressing processing: cold pressing processing is the most critical step in the cold rolling process, through cold pressing processing, can be realized
The originally round steel is compressed and the shape becomes extended.
4.shaping and welding: before shaping and welding, first of all, the use of precision measuring equipment to detect cold press processing
After the size of the steel material to ensure that accurate shaping and welding can be achieved.
5.surface treatment: Surface treatment is the last step of the cold rolling process, including painting, gas, polishing and electricity
Plating. The purpose of the surface treatment is to enhance its visual effect and processing properties, resulting in a quality product.
Our company was established in 2012, is a comprehensive company integrating industry and trade. The company has successively won the honorary titles of provincial integrity enterprise and municipal excellent enterprise. We are mainly engaged in various metal related products. Such as pipes, pipe fittings, rods, coils, profiles, medium and heavy plates, narrow strips and other types of materials. The warehouse has a variety of products of different specifications and materials, and the capacity is maintained at 30,000-50,000 tons/month. Products are widely used in petroleum, chemical, electric power, coal, machinery, high and low pressure boiler tubes, hydraulic props, ships and other industries. We make full use of the advantages of self-operated export rights and enter the international market. Our customers are located in South Korea, Canada, Iran, Pakistan, Indonesia, Vietnam, South America and other countries, and we have offices in Indonesia and Vietnam. The quality of our products is enjoyed at home and abroad. high reputation. We adhere to the business philosophy of "integrity service, win-win cooperation, customer first", and provide one-stop steel solutions for global customers. Welcome friends from all over the world to visit our company. We are looking forward to establishing business relationships and personal friendships with you.
Q:How do you control quality?
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