Home > Products > steel pipe > Alloy Seamless steel pipe ferrite stainless steel 444/446/630/631
Alloy Seamless steel pipe ferrite stainless steel 444/446/630/631
- 100 Ton / Tons per Month
- Tianjin Port
- T/T
Product Details
Thickness: | 6, 20 | Section Shape: | Round | Outer Diameter: | 168 - 273 mm |
Place of Origin: | Tianjin, China | Secondary Or Not: | Non-secondary | Application: | Structure Pipe |
Technique: | Hot Rolled | Certification: | Other | Surface Treatment: | Other, Polish |
Alloy Or Not: | Is Alloy |
Product Description
Ferritic Stainless Steel Properties and Applications
Ferritic steels are high chromium, magnetic stainless steels that have a low carbon content.
Known for their good ductility, resistance to corrosion and stress corrosion cracking, ferritic steels are commonly used in automotive applications, kitchenware and industrial equipment.
This grain structure is typical of alpha iron and is what gives ferritic steels their magnetic properties.
Ferritic steels cannot be hardened or strengthened by heat treatment, but have good resistance to stress-corrosion cracking. They can be cold worked and softened by annealing.
While not as strong or corrosion resistant as austenitic grades, the ferritic grades generally have better engineering properties.
Ferritic Stainless Steel Properties and Applications
Though generally very weldable, some ferritic steel grades can be prone to sensitization of the weld heat-affected zone and weld metal hot cracking. Weldability limitations, therefore, restrict the use of these steels to thinner gauges.
Due to their lower chromium and nickel content, standard ferritic steel grades are usually less expensive than their austenitic counterparts. Chromium content can range from 10.5 to 27 percent and, like martensitic grades, there is generally little to no nickel content. Specialty grades often include molybdenum, and to a lesser degree make use of aluminum and titanium.
Types:
Group 1 (type 409/410L): These have the lowest chromium content of all stainless steels and are ideal for slightly corrosive environments where localized rust is acceptable. The least expensive of all stainless steels, type 409 was initially created for automotive exhaust systems silencers, but can now be found in automotive exhaust tubing and catalytic convertor casings. Type 410L is often used for containers, buses and LCD monitor frames.
Group 2 (type 430): The most commonly used ferritic steel, type 430 has a higher chromium content and is, consequently, more resistant to corrosion by nitric acids, sulfur gases and many organic and food acids. In some applications, this grade can be used as a replacement for austenitic grade 304. Type 430 is often found in interior appliances, including washing machine drums, kitchen sinks, cutlery, indoor panels, dishwashers and other cooking utensils.
Group 3 (type 430Ti, 439 and 441): Having better weldability and formability characteristics than Group 2 ferritic steels, Group 3 steels can be used to replace austenitic type 304 austenitic in a wider range of applications, including in sinks, exchange tubes, exhaust systems and welded parts of washing machines.
Group 4 (type 434, 436, 444): With a higher molybdenum content, these ferritic stainless steel grades have enhanced corrosion resistance and are used in hot water tanks, solar water heaters, exhaust system parts, electric kettles, microwave oven elements, as well as automotive trip. Grade 444, in particular, has a pitting resistance equivalent (PRE) to Grade 316, allowing it to be used in more corrosive outdoor environments
Group 5 (446, 445, 447): This group of specialty stainless steels is characterized by a relatively high chromium content. The result is steels with excellent corrosion and scaling (or oxidation) resistance. In fact, the corrosion resistance of Grade 447 is equivalent to that of titanium metal. Molybdenum is also commonly added to improve corrosion resistance. Applications for Group 5 steels are found in highly corrosive coastal and offshore environments.
Contact Us
- Cenanze (Tianjin) Construction Equipment Co., Ltd.
- Contact nameCreema Ping
- Phone86-22-58103881
- AddressRoom 1012, Building A, Changying Business Square, Northwest Side, Crossing of Jingjin Road and Longzhou Road
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