309H UNS S30909 WN SO SW blind plate lap joint flange forging disc ring bleed ring

309 is an austenitic heat resistant alloy with oxidation resistance to 1900°F under constant temperature conditions. When frequent thermal cycling is involved, the alloy is resistant to about 1850°F. The high chromium and relatively low nickel content of 309 provide good resistance to high temperature sulfur bearing atmospheres. 309 has only moderate resistance to carbon absorption and is not suggested for use in highly carburizing atmospheres.

Often in many product forms, the grain size and carbon content can meet both the 309S and 309H requirements. Prolonged exposure to the 1100-1600°F temperature range will cause some sigma to form, lowering room temperature ductility and impact resistance. Should sigma formation be anticipated, care should be taken to avoid heavy mechanical impact at room temperature. 309 has a machinability rating of 43% relative to AISI B1112 steel. Room temperature forming is suggested. Weld with AWS E309-16 covered electrodes or ER309 bare wire.

Chemistry

Specifications

AMS 5523
ASME SA 240, ASME SA 312, ASME SA 479
ASTM A 240, ASTM A 276, ASTM A 276 Condition A, ASTM A 276 Condition S, ASTM A 312, ASTM A 479
EN 1.4833
UNS S30908, UNS S30909
Werkstoff 1.4833

Inventory

309 Pipe, 309 Plate, 309 Rod Coil, 309 Sheet, 309 Weld Wire

Common Trade Names

309 Stainless

Features

· Oxidation resistant to 1900°F

· Moderate strength at high temperature

· Ease of fabrication

· Good sulfidation resistance

· Good weldability

Applications

· Annealing covers and boxes

· Carbon saggers

· Waste incinerators

· Pulverized coal burners

· Brazing fixtures

· Lead pans, neutral salt pots

· Muffles, retorts

· Furnace fans and shafts

· Radiant tubes for aluminum and steel annealing

· Glass forming equipment

· Thermowells

· Paper mill equipment

· Power boiler tube hangers

· Rotary kilns and calciners

· Anchor bolts

Physical Properties

Density: 0.285 lb/inch3
Melting Point: 2500 - 2590°F

* 70°F to indicated temperature.

Mechanical Properties

Representative Tensile Properties

Typical Creep- Rupture Properties

We can provide 309H material in the form of flange, fittings, pipes, fasteners.

Huitong Group was established in 1978. After 38 years'development and innovation,by now,Huitong Group has set up multiple subsidiary companies.Among them,Zhengzhou Huitong Pipe Fitting Co.,Ltd.,with the indepent right of import and export, is mainly engaged in exporting steel pipe and pipe fittings for Huitong Group and assisting another subsidiary company of Huitong Group:Zhengzhou Huitong Machanical Equipment Co.,Ltd., in exporting machanical equipment.

Zhengzhou Huitong Pipeline Equipment Co.,Ltd.,with the strong support of Huitong Group,and years'development and innovation, are more and more professional in technical service and can manufacure products with all kinds of material,shape and size. Especially in elbows, tee, reducer, flange and pipe cap etc., we have gained more than 20 product patent, and hundreds of technology patent. Also,we have gradually taken an ireplacable role in High-pressure,high-temperature and anti-corrosion area. With the continuous construction of engery in China,such as petrol gas,electric power,etc.,our company has become the purchasing center of whole set fittings for such projects.In 2009,a foreign trade team established,is manily engaged in oil gas and electric power projects abroad.By now, our products have been exported to Canada,Malaysia,Parkistan,UAE, Eygpt,the Middle East countries, etc.. We have passed the qualification of ISO9001:2000 and API quality certification system. High-quality products and high-class service are well received by abroad customers in this industry. The unique diversified production line can offer you one-package serive, you can pruchase all complex products from us at one time. What's more, our sufficient material stock and conventional product stock can ensure you receive satisfied product in the shortest time.

With powerful financial strength,advanced managerial concept, excellent marketing service,strict quality control system and integrated marketing team,we would like to develop together with you hand in hand. Adhering to the operation principle of "faith first and clients foremost", we always supply high quality products, complete after-sales service and favorable prices. We sincerely hope to establish long-term cooperation with you on the basis of mutual benefits, reciprocity and common development.