Alloys 309 and 309S are austenitic chromium-nickel stainless steels that are often used for higher temperature applications. Due to their high chromium and nickel content, Alloys 309 and 309S are highly corrosion resistant, have outstanding resistance to oxidation, and excellent heat resistance while providing good strength at room and elevated temperatures.

stainless steel plates 309s

The only significant difference between 309 and 309S is the carbon content. Alloy 309S has a much less carbon composition which minimizes carbide precipitation and improves weldability. 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.

stainless steels plate 309s

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.

stainless steel 309s plate s

Alloy 309 is not designed for service in wet corrosive environments. The high carbon content, which is present to enhance creep properties, has a detrimental effect on aqueous corrosion resistance. The alloy is prone to intergranular corrosion after long term exposure at high temperatures. However, due to its high chromium content (23%), Alloy 309 is more corrosion resistant than most heat resistant alloys.

Product Features:

Corrosion resistant
Accurate dimensions
Can sustain high pressure & temperature load
Rust proof finish
Smooth transition from flange thickness to pipe
Ensure excellent stress distribution

Specification:

Standard	ASTM A240 / ASME SA240
Thickness	1.0mm – 100mm
Width	1000mm-2000mm
Production	Hot-Rolled (HR) / Cold-Rolled (CR)

Material & Grade :

Stainless Steel :
Grade: 304, 304L, 304H, 309, 309S, 316, 316L, 316H, 310, 310S, 317, 317L, 321, 347, 904L

Chemical Composition :

%	C	Cr	Ni	P	S	Si	Mn	Fe
Min	-	22	12	-	-	-	-	Balance
Max	0.08 (309s) 0.20 (309)	24	15	0.045	0.03	0.75	2.0	-

Physical Properties :

Mechanical & Physical Properties	21°C	537.8°C	649°C	760°C	871°C	982°C
Ultimate Tensile Strength /Mpa	620.5	-	358.5	-	124.1
0.2% Yield Strength /Mpa	310.3	-	151.7	-	-
Elongation %	50	-	26	-	32
Minimum Creep 0.0001% per hr	-	-	110.3	23.4	9.7	1.5
10,000 hr Rupture Strength	-	-	118.6	33.1	11	3.9
Coefficient of Thermal Expansion µm/m⁰C	-	17.5	-	-	18.2
Thermal Conductivity /kcal/(hr.m.°C)	11	17.1	18.5	-	-
Modulus of Elasticity / x105 Mpa	1.97	1.55	1.45	1.24	1.24

Other grades also available :

Nickel :
Grade: Nickel 200, Nickel 201
Inconel :
Grade: Inconel 600, Inconel 601, Inconel 625, Inconel 718
Duplex Steel :
Grade: UNS F44, F45, F51, F53, F55, F60, F61
Carbon Steel :
Grade: WPB , WPBW, WPHY 42, WPHY 46, WPHY 52, WPH 60, WPHY 65 & WPHY 70
Incoloy :
Grade: Incoloy 800, Incoloy 800H, Incoloy INCOLOY 800HT,Incoloy 825
Hastalloy :
Grade: Hastalloy B2, Hastalloy B3, Hastalloy C22, Hastalloy C276, Hastalloy X
Titanium :
Grade: Gr1, Gr2, Gr3, Gr5, Gr7, Gr11
Monel :
Grade: Monel 400, Monel K500, Monel R-405

Product Usage & Application :

Usefull in Paper & Pulp Companies
Usefull in High Pressure Applications
Usefull in Oil and Gas Industry
Usefull in Chemical Refinery
Usefull in Pipeline
Usefull in High Temperature Application
Usefull in Water Pipe Line
Usefull in Nuclear Power Plants
Usefull in Food Processing and Dairy Industries
Usefull in Boiler & Heat Exchangers

Why Choose Us :

You can get the perfect material according to your requirement at the least possible price.
We also offer Reworks, FOB, CFR, CIF, and door to door delivery prices. We suggest you to do deal for shipping which will be quite economical.
The materials we provide are completely verifiable, right from raw material test certificate to the final dimensional statement.(Reports will show on requirement)
e guarantee to give a response within 24hours(usually in the same hour)
You can get stock alternatives, mill deliveries with minimizing manufacturing time.
We are fully dedicated to our customers. If it will not possible to meet your requirements after examining all options, we will not mislead you by making false promises which will create good customer relations.

Tests we carry out (including both Destructive and Non-Destructive) :

Positive material recognition
Mechanical examining like tensile, Elongation and reduction of area.
Large-scale test
Chemical examination-Spectro analysis
Firmness test
Pitting protection test
Small tests
X-ray test
Impact analysis
Eddy current examining
Hydrostatic analysis
Prompt test

Packing :

Packing is quite important especially in a case of international shipments in which consignment pass through various channels to reach the ultimate destination, so we put special concern regarding packaging.
We pack our goods in numerous ways based on the products. We pack our products in multiple ways, such as,