Hot selling ss 304 seamless pipe
Alloy 309/309S (UNS S30900/S30908) austenitic stainless steel is typically used for elevated temperature applications. Its high chromium and nickel content provides comparable corrosion resistance, superior resistance to oxidation, and the retention of a larger fraction of room temperature strength than the common austenitic Alloy 304
Alloy 309/309S/309H(UNS S30900, S30908, S30909) W. Nr. 1.4833
General Properties
Alloy 309 (UNS S30900) is an austenitic stainless steel developed for use in high temperature corrosion resistance applications. The alloy resists oxidation up to 1900°F (1038°C) under non-cyclic conditions. Frequent thermal cycling reduces oxidation resistance to approximately 1850°F (1010°C).
Because of its high chromium and low nickel content, Alloy 309 can be utilized in sulfur containing atmospheres up to 1832°F (1000°C). The alloy is not recommended for use in highly carburizing atmospheres since it exhibits only moderate resistance to carbon absorption. Alloy 309 can be utilized in slightly oxidizing, nitriding, cementing and thermal cycling applications, albeit, the maximum service temperature must be reduced.
When heated between 1202 – 1742°F (650 – 950°C) the alloy is subject to sigma phase precipitation. A solution annealing treatment at 2012 – 2102°F (1100 – 1150°C) will restore a degree of toughness.
309S (UNS S30908) is the low carbon version of the alloy. It is utilized for ease of fabrication. 309H (UNS S30909) is a high carbon modification developed for enhanced creep resistance. It most instances the grain size and carbon content of the plate can meet both the 309S and 309H requirements.
Alloy 309 can be easily welded and processed by standard shop fabrication practices.
Applications
Furnaces — burners, doors, fans, piping and recuperators
Fluidized Bed Furnaces — grids, piping, wind boxes
Paper Mill Equipment
Petroleum Refining — catalytic recovery systems, recuperators
Power Generation — pulverized coal burners, tube hangers
Thermal Processing — annealing covers and boxes, burners grids, doors, fans, lead pans and neutral salt pots, muffles and retorts, recuperators, walking beams
Waste Treatment — incinerators, rotary kilns and calciners
Chemical Analysis
Weight % (all values are maximum unless a range is otherwise indicated)
Mechanical Properties
Typicals Values at 68°F (20°C)
Saky Steel Co.,Ltd is located in Jiangsu Province. The company was founded in 1995. Now the company covers totally 220,000 square meters . The company has a total employee of 150 out of whom 120 are professionals .The company has been continually expanding itself ever since it's founded . Now the company is a ISO9001:2000 certified company and has been continually
awarded by the local government .
The company through investment steel smelting and forging factory resume stability, a wide range of available resources.Main produce and process stainless steel pipe/tube, stainless steel coil/sheet/plate/strip, stainless steel bar/rod/shaft/profile, stainless steel wire/wire rod/wire rope.Our company supply products from TISCO, LISCO, BAOSTEEL, HBIS and so on.
Product Process
Q: Are you trading company or manufacturer ?
A: We are factory.
Q: How long is your delivery time?
A: Generally it is 5-10 days if the goods are in stock. or it is 15-20 days if the goods are not in stock, it is according to quantity.
Q: Do you provide samples ? is it free or extra ?
A: Yes, we could offer the sample for free charge but do not pay the cost of freight.
Q: Why Sakysteel is your best choice ?
1 We have shown remarkable growth as leading manufacturer and exporter of Stainless Steel Products which are used in various industries.
2 Advantages : We offer competitive price with best service .
3 We have exported to Ecuador, Singapore, Australia, Vietnam, Indonesia, Malaysia, Turkey, South Africa, Chile, Mexico, Brazil, Peru, Ghana, Bahrain etc. So we are rich in export experience and specialize in stainless steel .
4 Our company is engaged in stainless steel area over 20 years, we understand the performance and application scope.
5 Shipment of goods -More than 30 countries worldwide
6 Every process will be checked by responsible QC,which insures every product's quality ;
7 We have win reputation based on ourselves factory.
1 Email the tracking No. for you to track the parcels.
2 Problem solving
3 Problem happen→send pictures→send sample-→analyses problem→ Negotiation result
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